Пример #1
0
        public static bool CreateScratchMdb(HluDataSet.incidDataTable incidTable, 
            HluDataSet.incid_mm_polygonsDataTable incidMMTable)
        {
            try
            {
                _incidTable = incidTable;
                _incidMMTable = incidMMTable;

                _scratchMdbPath = String.Empty;
                try { _scratchMdbPath = Path.GetTempPath(); }
                catch
                {
                    _scratchMdbPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
                    _scratchMdbPath += Path.DirectorySeparatorChar.ToString();
                }

                _scratchMdbPath += Path.GetFileNameWithoutExtension(Path.GetRandomFileName()) + ".mdb";

                OdbcCP32 odbc = new OdbcCP32();
                odbc.CreateDatabase(_scratchMdbPath);
                string connString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};", _scratchMdbPath);
                string defaultSchema = "";
                bool promptPwd = false;

                _scratchDb = new DbOleDb(ref connString, ref defaultSchema, ref promptPwd,
                    Properties.Resources.PasswordMaskString, Settings.Default.UseAutomaticCommandBuilders,
                    true, Settings.Default.DbIsUnicode, Settings.Default.DbUseTimeZone, 255,
                    Settings.Default.DbBinaryLength, Settings.Default.DbTimePrecision,
                    Settings.Default.DbNumericPrecision, Settings.Default.DbNumericScale);

                return true;
            }
            catch
            {
                if (File.Exists(_scratchMdbPath))
                {
                    try
                    {
                        if ((_scratchDb != null) && (_scratchDb.Connection.State != ConnectionState.Closed))
                            _scratchDb.Connection.Close();
                        File.Delete(_scratchMdbPath);
                    }
                    catch { }
                }
                return false;
            }
        }
        private string ExportMdb(string targetListStr, string fromClauseStr, List<List<SqlFilterCondition>> exportFilter,
            DbBase dataBase, List<ExportField> exportFields, DataTable exportTable, int[] sortOrdinals,
            int[] matrixOrdinals, int[] formationOrdinals, int[] managementOrdinals, int[] complexOrdinals, int[] bapOrdinals, int[] sourceOrdinals, 
            int[][] fieldMap, out int exportRowCount)
        {
            exportRowCount = -1;
            int outputRowCount = 0;
            DbOleDb dbOut = null;

            string tempPath = String.Empty;
            try { tempPath = Path.GetTempPath(); }
            catch { tempPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData); }
            tempPath = Path.Combine(tempPath, Path.GetFileNameWithoutExtension(Path.GetRandomFileName()) + ".mdb");

            try
            {
                if (File.Exists(tempPath)) File.Delete(tempPath);
                OdbcCP32 odbc = new OdbcCP32();
                odbc.CreateDatabase(tempPath);
                string connString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};", tempPath);
                string defaultSchema = "";
                bool promptPwd = false;
                dbOut = new DbOleDb(ref connString, ref defaultSchema, ref promptPwd,
                    Properties.Resources.PasswordMaskString, Settings.Default.UseAutomaticCommandBuilders,
                    true, Settings.Default.DbIsUnicode, Settings.Default.DbUseTimeZone, 255,
                    Settings.Default.DbBinaryLength, Settings.Default.DbTimePrecision,
                    Settings.Default.DbNumericPrecision, Settings.Default.DbNumericScale);

                //---------------------------------------------------------------------
                // FIX: 054 Improve error reporting during exports.
                //
                // Throw an error if the table cannot be created.
                if (!dbOut.CreateTable(exportTable))
                    throw new Exception("Error creating the export table");
                //---------------------------------------------------------------------

                DataSet datasetOut = new DataSet("Export");

                IDbDataAdapter adapterOut = dbOut.CreateAdapter(exportTable);
                adapterOut.MissingSchemaAction = MissingSchemaAction.AddWithKey;
                adapterOut.Fill(datasetOut);
                int[] pkOrdinals = exportTable.PrimaryKey.Select(c => c.Ordinal).ToArray();
                exportTable.PrimaryKey = pkOrdinals.Select(o => exportTable.Columns[o]).ToArray();
                adapterOut.TableMappings.Clear();
                adapterOut.TableMappings.Add(exportTable.TableName, datasetOut.Tables[0].TableName);

                // Save the export table structure so that the field
                // properties can be examined during the export.
                DataTable exportTable2 = exportTable;

                exportTable = datasetOut.Tables[0];

                //---------------------------------------------------------------------
                // CHANGED: CR13 (Export features performance)
                // Improve the performance as much as possible when
                // creating the attribute database.
                //
                // Turn off notifications and index maintenance whilst
                // inserting the records.
                exportTable.BeginLoadData();
                //---------------------------------------------------------------------

                // If there is only one long list then chunk
                // it up into smaller lists.
                if (exportFilter.Count == 1)
                {
                    try
                    {
                        List<SqlFilterCondition> whereCond = new List<SqlFilterCondition>();
                        whereCond = exportFilter[0];
                        exportFilter = whereCond.ChunkClause(240).ToList();
                    }
                    catch { }
                }

                //---------------------------------------------------------------------
                // FIX: 047 Break exporting attributes into chunks to avoid errors
                // with excessive sql lengths.
                //
                outputRowCount = 0;
                exportRowCount = 0;

                //---------------------------------------------------------------------
                // FIX: 046 Don't export duplicate record details for the
                // same incid.
                //
                // Set the field map indexes to the start of the array.
                int[] fieldMapIndex = new int[fieldMap.Length];
                for (int k = 0; k < fieldMap.Length; k++)
                {
                    fieldMapIndex[k] = 1;
                }
                //---------------------------------------------------------------------

                for (int j = 0; j < exportFilter.Count; j++)
                {
                    DataRow exportRow = exportTable.NewRow();
                    bool rowAdded = false;

                    // Union the constituent parts of the export query
                    // together into a single SQL string.
                    string sql = ScratchDb.UnionQuery(targetListStr, fromClauseStr,
                        sortOrdinals, exportFilter[j], dataBase);

                    // Execute the sql to retrieve the records.
                    using (IDataReader reader = _viewModelMain.DataBase.ExecuteReader(sql,
                        _viewModelMain.DataBase.Connection.ConnectionTimeout, CommandType.Text))
                    {
                        string currIncid = String.Empty;
                        string prevIncid = String.Empty;
                        int currMatrixId = -1;
                        int currFormationId = -1;
                        int currManagementId = -1;
                        int currComplexId = -1;
                        int currBapId = -1;
                        int currSourceId = -1;
                        int currSourceDateStart = 0;
                        int currSourceDateEnd = 0;
                        List<int> matrixIds = null;
                        List<int> formationIds = null;
                        List<int> managementIds = null;
                        List<int> complexIds = null;
                        List<int> bapIds = null;
                        List<int> sourceIds = null;
                        string currSourceDateType = String.Empty;
                        int exportColumn;

                        // Read each record and process the contents.
                        while (reader.Read())
                        {
                            // Get the current incid.
                            currIncid = reader.GetString(_incidOrdinal);

                            //---------------------------------------------------------------------
                            // FIX: 046 Don't export duplicate record details for the
                            // same incid.
                            //
                            // Get the current matrix id.
                            if (_matrixIdOrdinal != -1)
                            {
                                object matrixIdValue = reader.GetValue(_matrixIdOrdinal);
                                if (matrixIdValue != DBNull.Value)
                                    currMatrixId = (int)matrixIdValue;
                                else
                                    currMatrixId = -1;
                            }

                            // Get the current formation id.
                            if (_formationIdOrdinal != -1)
                            {
                                object FormationIdValue = reader.GetValue(_formationIdOrdinal);
                                if (FormationIdValue != DBNull.Value)
                                    currFormationId = (int)FormationIdValue;
                                else
                                    currFormationId = -1;
                            }

                            // Get the current Management id.
                            if (_managementIdOrdinal != -1)
                            {
                                object ManagementIdValue = reader.GetValue(_managementIdOrdinal);
                                if (ManagementIdValue != DBNull.Value)
                                    currManagementId = (int)ManagementIdValue;
                                else
                                    currManagementId = -1;
                            }

                            // Get the current Complex id.
                            if (_complexIdOrdinal != -1)
                            {
                                object ComplexIdValue = reader.GetValue(_complexIdOrdinal);
                                if (ComplexIdValue != DBNull.Value)
                                    currComplexId = (int)ComplexIdValue;
                                else
                                    currComplexId = -1;
                            }

                            // Get the current bap id (or equivalent lookup table field).
                            if (_bapIdOrdinal != -1)
                            {
                                object bapIdValue = reader.GetValue(_bapIdOrdinal);
                                if (bapIdValue != DBNull.Value)
                                    currBapId = (int)bapIdValue;
                                else
                                    currBapId = -1;
                            }

                            // Get the current source id (or equivalent lookup table field).
                            if (_sourceIdOrdinal != -1)
                            {
                                object sourceIdValue = reader.GetValue(_sourceIdOrdinal);
                                if (sourceIdValue != DBNull.Value)
                                    currSourceId = (int)sourceIdValue;
                                else
                                    currSourceId = -1;
                            }
                            //---------------------------------------------------------------------

                            //---------------------------------------------------------------------
                            // CHANGED: CR17 (Exporting date fields)
                            // Store all of the source date fields for use later when
                            // formatting the attribute data.
                            //
                            // Get the current source date start.
                            if ((_sourceDateStartOrdinals.Count() > 0) &&
                                !reader.IsDBNull(_sourceDateStartOrdinals[0]))
                                currSourceDateStart = reader.GetInt32(_sourceDateStartOrdinals[0]);

                            // Get the current source date type.
                            if ((_sourceDateEndOrdinals.Count() > 0) &&
                                !reader.IsDBNull(_sourceDateEndOrdinals[0]))
                                currSourceDateEnd = reader.GetInt32(_sourceDateEndOrdinals[0]);

                            // Get the current source date type.
                            if ((_sourceDateTypeOrdinals.Count() > 0) &&
                                !reader.IsDBNull(_sourceDateTypeOrdinals[0]))
                                currSourceDateType = reader.GetString(_sourceDateTypeOrdinals[0]);
                            //---------------------------------------------------------------------

                            // If this incid is different to the last record's incid
                            // then process all the fields.
                            if (currIncid != prevIncid)
                            {
                                // If the last export row has not been added then
                                // add it now.
                                if (!exportRow.IsNull(fieldMap[0][1]))
                                {
                                    exportTable.Rows.Add(exportRow);
                                    rowAdded = true;

                                    // Increment the output row count.
                                    outputRowCount += 1;

                                    // Commit the outputs and update the export row count
                                    // every 10,000 records to avoid excessive memory use.
                                    if (outputRowCount >= 10000)
                                    {
                                        exportRowCount += adapterOut.Update(datasetOut);
                                        outputRowCount = 0;
                                    }
                                }

                                // Store the last incid.
                                prevIncid = currIncid;

                                //---------------------------------------------------------------------
                                // FIX: 046 Don't export duplicate record details for the
                                // same incid.
                                //
                                matrixIds = new List<int>();
                                formationIds = new List<int>();
                                managementIds = new List<int>();
                                complexIds = new List<int>();
                                bapIds = new List<int>();
                                sourceIds = new List<int>();

                                // Reset the field map indexes to the start of the array.
                                for (int k = 0; k < fieldMap.Length; k++)
                                {
                                    fieldMapIndex[k] = 1;
                                }
                                //---------------------------------------------------------------------

                                // Create a new export row ready for the next values.
                                exportRow = exportTable.NewRow();
                                rowAdded = false;

                                // Loop through all the fields in the field map
                                // to transfer the values from the input reader
                                // to the correct field in the export row.
                                for (int i = 0; i < fieldMap.GetLength(0); i++)
                                {
                                    //---------------------------------------------------------------------
                                    // FIX: 046 Don't export duplicate record details for the
                                    // same incid.
                                    //
                                    // Set the export column ordinal from the current
                                    // field map index for this field.
                                    exportColumn = fieldMap[i][fieldMapIndex[i]];

                                    // Increment the field map index for this field.
                                    fieldMapIndex[i] += 1;
                                    //---------------------------------------------------------------------

                                    // If this field is not mapped from the input reader
                                    // set the export table value to null.
                                    if (fieldMap[i][0] == -1)
                                        continue;

                                    // Store the input value of the current column.
                                    object inValue = reader.GetValue(fieldMap[i][0]);

                                    // If the value is null then skip this field.
                                    if (inValue == DBNull.Value)
                                        continue;

                                    // Get the properties for the current export field.
                                    ExportField exportField = exportFields.Find(f => f.FieldOrdinal == i);

                                    //---------------------------------------------------------------------
                                    // FIX: 048 Enable fields to be exported using a different
                                    // data type.
                                    //
                                    // Convert the input value to the output value data type and format.
                                    object outValue;
                                    outValue = ConvertInput(fieldMap[i][0], inValue, reader.GetFieldType(fieldMap[i][0]),
                                        exportTable2.Columns[exportColumn].DataType,
                                        (exportField != null) ? exportField.FieldFormat : null,
                                        currSourceDateStart, currSourceDateEnd, currSourceDateType);
                                    //---------------------------------------------------------------------

                                    // If the value is not null.
                                    if (outValue != null)
                                    {
                                        // Get the maximum length of the column.
                                        int fieldLength = exportTable2.Columns[exportColumn].MaxLength;

                                        // If the maximum length of the column is shorter
                                        // than the value then truncate the value as it
                                        // is transferred  to the export row.
                                        if ((fieldLength != -1) && (fieldLength < outValue.ToString().Length))
                                            exportRow[exportColumn] = outValue.ToString().Substring(0, fieldLength);
                                        else
                                            exportRow[exportColumn] = outValue;
                                    }
                                }
                            }
                            else
                            {
                                // Loop through all the fields in the field map
                                // to transfer the values from the input reader
                                // to the correct field in the export row.
                                for (int i = 0; i < fieldMap.GetLength(0); i++)
                                {
                                    // Only process fields that have multiple outputs
                                    // specified in the field map.
                                    if (fieldMapIndex[i] < fieldMap[i].Length)
                                    {
                                        //---------------------------------------------------------------------
                                        // FIX: 046 Don't export duplicate record details for the
                                        // same incid.
                                        //
                                        // Set the export column ordinal from the current
                                        // field map index for this field.
                                        exportColumn = fieldMap[i][fieldMapIndex[i]];

                                        // If the value is not null and the string value is different
                                        // to the last string value for this incid, or, the column is
                                        // allowed to have duplicates and the bap or source is different
                                        // to the last bap or source, then output the value.
                                        if (Array.IndexOf(matrixOrdinals, exportColumn) != -1)
                                        {
                                            if (matrixIds.Contains(currMatrixId))
                                                continue;
                                        }
                                        else if (Array.IndexOf(formationOrdinals, exportColumn) != -1)
                                        {
                                            if (formationIds.Contains(currFormationId))
                                                continue;
                                        }
                                        else if (Array.IndexOf(managementOrdinals, exportColumn) != -1)
                                        {
                                            if (managementIds.Contains(currManagementId))
                                                continue;
                                        }
                                        else if (Array.IndexOf(complexOrdinals, exportColumn) != -1)
                                        {
                                            if (complexIds.Contains(currComplexId))
                                                continue;
                                        }
                                        else if (Array.IndexOf(bapOrdinals, exportColumn) != -1)
                                        {
                                            if (bapIds.Contains(currBapId))
                                                continue;
                                        }
                                        else if (Array.IndexOf(sourceOrdinals, exportColumn) != -1)
                                        {
                                            if (sourceIds.Contains(currSourceId))
                                                continue;
                                        }

                                        // Increment the field map index for this field.
                                        fieldMapIndex[i] += 1;
                                        //---------------------------------------------------------------------

                                        // If this field is not mapped from the input reader
                                        // set the export table value to null.
                                        if (fieldMap[i][0] == -1)
                                            continue;

                                        // Store the input value of the current column.
                                        object inValue = reader.GetValue(fieldMap[i][0]);

                                        // If the value is null then skip this field.
                                        if (inValue == DBNull.Value)
                                            continue;

                                        // Get the properties for the current export field.
                                        ExportField exportField = exportFields.Find(f => f.FieldOrdinal == i);

                                        //---------------------------------------------------------------------
                                        // FIX: 048 Enable fields to be exported using a different
                                        // data type.
                                        //
                                        // Convert the input value to the output value data type and format.
                                        object outValue;
                                        outValue = ConvertInput(fieldMap[i][0], inValue, reader.GetFieldType(fieldMap[i][0]),
                                            exportTable2.Columns[exportColumn].DataType,
                                            (exportField != null) ? exportField.FieldFormat : null,
                                            currSourceDateStart, currSourceDateEnd, currSourceDateType);
                                        //---------------------------------------------------------------------

                                        // If the value is not null.
                                        if (outValue != null)
                                        {
                                            // Get the maximum length of the output column.
                                            int fieldLength = exportTable2.Columns[exportColumn].MaxLength;

                                            // If the maximum length of the column is shorter
                                            // than the value then truncate the value as it
                                            // is transferred  to the export row.
                                            if ((fieldLength != -1) && (fieldLength < outValue.ToString().Length))
                                                exportRow[exportColumn] = outValue.ToString().Substring(0, fieldLength);
                                            else
                                                exportRow[exportColumn] = outValue;
                                        }
                                    }
                                }
                            }

                            //---------------------------------------------------------------------
                            // FIX: 046 Don't export duplicate record details for the
                            // same incid.
                            //
                            // Store the current ids so that they are not output again.
                            matrixIds.Add(currMatrixId);
                            formationIds.Add(currFormationId);
                            managementIds.Add(currManagementId);
                            complexIds.Add(currComplexId);
                            bapIds.Add(currBapId);
                            sourceIds.Add(currSourceId);
                            //---------------------------------------------------------------------
                        }
                    }

                    // If the last export row has not been saved then
                    // save it now.
                    if (!rowAdded && (!exportRow.IsNull(fieldMap[0][1])))
                    {
                        exportTable.Rows.Add(exportRow);
                        rowAdded = true;

                        // Increment the output row count.
                        outputRowCount += 1;
                    }
                }
                //---------------------------------------------------------------------

                // Commit any remaining outputs and update the export row count.
                exportRowCount += adapterOut.Update(datasetOut);

                // Turn notifications and index maintenance back on again.
                exportTable.EndLoadData();

                //---------------------------------------------------------------------
                // FIX: 054 Improve error reporting during exports.
                //
                // Exit if no records were exported.
                if (exportRowCount < 1)
                    throw new Exception("Export query did not retrieve any rows");

                return tempPath;
                //---------------------------------------------------------------------

            }
            //---------------------------------------------------------------------
            // FIX: 054 Improve error reporting during exports.
            //
            catch (Exception ex)
            {
                MessageBox.Show(String.Format("Export failed. The error message was:\n\n{0}.",
                    ex.Message), "HLU: Export", MessageBoxButton.OK, MessageBoxImage.Error);

                // Delete the temporary database if it was created.
                if (File.Exists(tempPath))
                {
                    try { File.Delete(tempPath); }
                    catch { _viewModelMain.ExportMdbs.Add(tempPath); }
                }

                // Return a null database path as the export didn't finish.
                return null;
            }
            //---------------------------------------------------------------------
            finally
            {
                if ((dbOut != null) && (dbOut.Connection.State != ConnectionState.Closed))
                {
                    try { dbOut.Connection.Close(); }
                    catch { }
                }
            }
        }
        private string ExportMdb(string sql, DataTable exportTable, int incidOrdinal,
            List<int> fieldCountList, out int exportRowCount)
        {
            exportRowCount = -1;
            DbOleDb dbOut = null;
            string tempPath = String.Empty;
            try { tempPath = Path.GetTempPath(); }
            catch { tempPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData); }
            tempPath = Path.Combine(tempPath, Path.GetFileNameWithoutExtension(Path.GetRandomFileName()) + ".mdb");

            try
            {
                if (File.Exists(tempPath)) File.Delete(tempPath);
                OdbcCP32 odbc = new OdbcCP32();
                odbc.CreateDatabase(tempPath);
                string connString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};", tempPath);
                string defaultSchema = "";
                bool promptPwd = false;
                dbOut = new DbOleDb(ref connString, ref defaultSchema, ref promptPwd,
                    Properties.Resources.PasswordMaskString, Settings.Default.UseAutomaticCommandBuilders,
                    true, Settings.Default.DbIsUnicode, Settings.Default.DbUseTimeZone, 255,
                    Settings.Default.DbBinaryLength, Settings.Default.DbTimePrecision,
                    Settings.Default.DbNumericPrecision, Settings.Default.DbNumericScale);
                dbOut.CreateTable(exportTable);
                DataSet datasetOut = new DataSet("Export");

                IDbDataAdapter adapterOut = dbOut.CreateAdapter(exportTable);
                adapterOut.Fill(datasetOut);
                int[] pkOrdinals = exportTable.PrimaryKey.Select(c => c.Ordinal).ToArray();
                exportTable.PrimaryKey = pkOrdinals.Select(o => exportTable.Columns[o]).ToArray();
                adapterOut.TableMappings.Clear();
                adapterOut.TableMappings.Add(exportTable.TableName, datasetOut.Tables[0].TableName);
                exportTable = datasetOut.Tables[0];

                DataRow exportRow = null;
                bool rowAdded = false;

                using (IDataReader reader = _viewModelMain.DataBase.ExecuteReader(sql,
                    _viewModelMain.DataBase.Connection.ConnectionTimeout, CommandType.Text))
                {
                    int runTotal = 0;
                    int[][] fieldMapTemplate = fieldCountList.Select((i, index) =>
                        new int[] { index, index + runTotal, i, (runTotal += i - (i > 0 ? 1 : 0)) })
                        .Select(e => new int[] { e[0], e[1], e[1] + e[2] }).ToArray();

                    int[] dupsAllowed = (from e in exportTable.Columns.Cast<DataColumn>()
                                         let q = from c in _viewModelMain.HluDataset.incid_sources.Columns.Cast<DataColumn>()
                                                 where !Regex.IsMatch(c.ColumnName,
                                                    @"(\Aincid\z|_(importance|id)\z)", RegexOptions.IgnoreCase)
                                                 select c.ColumnName
                                         where q.Count(n => Regex.IsMatch(e.ColumnName,
                                             n + @"(_[0-9]+)*\z", RegexOptions.IgnoreCase)) == 1
                                         select e.Ordinal).ToArray();

                    int[][] fieldMap = new int[fieldMapTemplate.Length][];
                    string currIncid = String.Empty;
                    string prevIncid = String.Empty;

                    while (reader.Read())
                    {
                        currIncid = reader.GetString(incidOrdinal);
                        if (currIncid != prevIncid)
                        {
                            prevIncid = currIncid;
                            fieldMap = fieldMapTemplate.Select(a => new int[] { a[0], a[1], a[2] }).ToArray();
                            if (exportRow != null)
                            {
                                exportTable.Rows.Add(exportRow);
                                rowAdded = true;
                            }
                            exportRow = exportTable.NewRow();
                            rowAdded = false;
                            for (int i = 0; i < fieldMap.GetLength(0); i++)
                            {
                                object item = reader.GetValue(fieldMap[i][0]);
                                if (item != DBNull.Value)
                                    exportRow[fieldMap[i][1]] = reader.GetValue(fieldMap[i][0]);
                                fieldMap[i][1]++;
                            }
                        }
                        else
                        {
                            for (int i = 0; i < fieldMap.GetLength(0); i++)
                            {
                                if (fieldMap[i][1] < fieldMap[i][2])
                                {
                                    object item = reader.GetValue(fieldMap[i][0]);
                                    if ((item != DBNull.Value) && (!item.Equals(exportRow[fieldMap[i][1] - 1]) ||
                                        (Array.IndexOf(dupsAllowed, fieldMap[i][1]) != -1)))
                                        exportRow[fieldMap[i][1]++] = item;
                                }
                            }
                        }
                    }
                }

                if (!rowAdded && (exportRow != null)) exportTable.Rows.Add(exportRow);

                exportRowCount = adapterOut.Update(datasetOut);

                return exportRowCount != -1 ? tempPath : null;
            }
            catch
            {
                if (File.Exists(tempPath))
                {
                    try { File.Delete(tempPath); }
                    catch { _viewModelMain.ExportMdbs.Add(tempPath); }
                }
                return null;
            }
            finally
            {
                if ((dbOut != null) && (dbOut.Connection.State != ConnectionState.Closed))
                {
                    try { dbOut.Connection.Close(); }
                    catch { }
                }
            }
        }
 /// <summary>
 /// Handles event when Manage DSN button is clicked
 /// </summary>
 /// <param name="param"></param>
 /// <remarks></remarks>
 private void ManageDsnCommandClick(object param)
 {
     //DispatcherHelper.DoEvents();
     OdbcCP32 odbccp32 = new OdbcCP32();
     bool result = odbccp32.ManageDatasources(_windowHandle);
     OnPropertyChanged("DsnList");
 }