public ColumnName ( int columnNumber ) : string | ||
columnNumber | int | Number of column to retrieve. |
Результат | string |
/// <summary> /// Initialize the DatabaseRow with a single row form a Halide.H3Reader object. /// </summary> /// <param name="reader">An open Halide.H3Reader object that can be used to read a row from a database.</param> public DatabaseRow(H3Reader reader) { _fieldCount = reader.FieldCount; try { _dataItems = new DatabaseItem[_fieldCount]; if (_dataIndex != null) _dataIndex.Clear(); for (int x = 0; x < _fieldCount; x++) { _dataItems[x] = new DatabaseItem(); String columnName = reader.ColumnName(x).ToLower(); _dataIndex.Add(columnName, x); _dataItems[x].IsNullable = reader.GetColumnAllowNulls(columnName); _dataItems[x].ColumnName = columnName; _dataItems[x].ColumnSize = reader.GetColumnSize(columnName); _dataItems[x].ColumnSQLType = reader.GetDataTypeName(columnName).ToLower(); _dataItems[x].IsAutoIncrementing = reader.GetColumnIsAutoIncrement(columnName); _dataItems[x].IsIdentity = reader.GetColumnIsIdentity(columnName); _dataItems[x].IsPrimaryKey = reader.GetColumnIsKey(columnName); _dataItems[x].SystemDataType = reader.GetColumnSystemDataType(columnName).ToLower(); _dataItems[x].Value = reader.GetString(columnName); } } catch { } }
/// <summary> /// Generate CSV data from a SQL Server request. Converts quotation marks to """. /// </summary> /// <param name="select">SQL Server command to execute, which retrieves a dataset.</param> /// <param name="connectionStringName">Connection String name in the Web.config file.</param> /// <param name="includeHeaders">Include column names as a header row in the CSV file.</param> /// <param name="alwaysUseQuotes">Wrap all values in quotation marks. False will omit quotation marks around numeric values.</param> /// <returns>StringBuilder result with the new CSV data.</returns> public static StringBuilder GenerateCSV(String select, String connectionStringName, Boolean includeHeaders, Boolean alwaysUseQuotes) { StringBuilder csv = new StringBuilder(); using (H3Reader reader = new H3Reader(select, true, connectionStringName)) { #region Build header row if (includeHeaders) { for (Int32 x = 0; x < reader.FieldCount; x++) { if (x > 0) { csv.Append(","); } csv.Append("\"" + reader.ColumnName(x) + "\""); } csv.Append("\r\n"); } #endregion #region Build data rows ArrayList types = new ArrayList(); types.Add("int"); types.Add("bigint"); types.Add("float"); types.Add("decimal"); types.Add("numeric"); types.Add("money"); types.Add("tinyint"); types.Add("int"); types.Add("smallint"); types.Add("smallmoney"); types.Add("real"); while (reader.Read()) { for (Int32 x = 0; x < reader.FieldCount; x++) { if (x > 0) { csv.Append(","); } if (!alwaysUseQuotes && types.Contains(reader.GetDataTypeName(x).ToLower())) { csv.Append(reader[x]); } else { csv.Append("\"" + reader[x].Replace("\"", """) + "\""); } } csv.Append("\r\n"); } #endregion } return csv; }