public Task CheckDbConnection()
{
return(Task.Run(() =>
{
DbConnection connection = null;
try
{
connection = DbUtility.GetDbConnection(this.connectionDetail);
connection.Open();
}
catch (Exception ex)
{
throw DbUtility.GetDbException(ex);
}
finally
{
if (connection != null)
{
connection.Close();
}
}
}));
}
public Task <int[]> Save(DbSaveEventArgs argument)
{
return(Task.Run(() =>
{
DbConnection connection = null;
DbTransaction transaction = null;
int[] updatedRowCount;
try
{
if (argument.ChangedTableSet == null || argument.ChangedTableSet.Tables.Count <= 0)
{
throw new Exception(Properties.Resources.ERROR_ChangeTableEmpty);
}
updatedRowCount = new int[argument.ChangedTableSet.Tables.Count];
string select = string.Empty;
connection = DbUtility.GetDbConnection(this.connectionDetail);
connection.Open();
transaction = connection.BeginTransaction();
for (int i = 0; i < argument.ChangedTableSet.Tables.Count; i++)
{
var columnNameList = argument.ChangedTableSet.Tables[i].Columns.Cast <DataColumn>().Select(c => c.ColumnName);
select = string.Format(@" SELECT `{0}`
FROM {1} ", string.Join("`, `", columnNameList),
argument.ChangedTableSet.Tables[i].TableName);
var adapter = DbUtility.GetDataAdapter(this.connectionDetail.AdapterType, select, connection);
var myCB = DbUtility.GetCommandBuilder(this.connectionDetail.CommandBuilderType, adapter);
adapter.SelectCommand.Transaction = transaction;
adapter.InsertCommand = myCB.GetInsertCommand();
adapter.UpdateCommand = myCB.GetUpdateCommand();
adapter.DeleteCommand = myCB.GetDeleteCommand();
adapter.ContinueUpdateOnError = argument.ContinueUpdateOnError;
updatedRowCount[i] = adapter.Update(argument.ChangedTableSet.Tables[i]);
}
transaction.Commit();
}
catch (Exception ex)
{
if (transaction != null)
{
transaction.Rollback();
}
throw DbUtility.GetDbException(ex);
}
finally
{
if (connection != null)
{
connection.Close();
}
}
return updatedRowCount;
}));
}
public Task <DataTable> Select(DbLoadEventArgs argument)
{
return(Task.Run(() =>
{
DbConnection connection = null;
try
{
var tmtDbParams = new DbParams(this.connectionDetail.ParameterType, this.connectionDetail.Culture, argument.IsCaseSensitive);
if (string.IsNullOrWhiteSpace(argument.TableName))
{
throw new Exception(Properties.Resources.ERROR_TableNameEmpty);
}
string selectColums;
if (argument.ColumnDbNameList?.Length > 0)
{
if (argument.UseBackticks)
{
selectColums = $"`{string.Join("`, `", argument.ColumnDbNameList)}`";
}
else
{
selectColums = string.Join(", ", argument.ColumnDbNameList);
}
}
else
{
selectColums = "*";
}
var select = $" SELECT {selectColums} FROM {argument.TableName} ";
var(sWhere, paramArray) = tmtDbParams.GetWhere(argument.SearchConditionList, this.connectionDetail.IsMysql);
if (paramArray.Count > 0)
{
if (string.IsNullOrWhiteSpace(argument.DefaultWhereStatement) == false)
{
select += $"{sWhere} AND {argument.DefaultWhereStatement}";
}
else
{
select += sWhere;
}
}
else
{
if (string.IsNullOrWhiteSpace(argument.DefaultWhereStatement) == false)
{
select += $"WHERE {argument.DefaultWhereStatement}";
}
}
if (string.IsNullOrWhiteSpace(argument.DefaultOrderByStatement) == false)
{
select += $" ORDER BY {argument.DefaultOrderByStatement} ";
}
if (argument.LimitOffset.HasValue)
{
select += $" LIMIT 100 OFFSET {argument.LimitOffset} ";
}
else
{
select += " LIMIT 100 ";
}
connection = DbUtility.GetDbConnection(this.connectionDetail);
connection.Open();
var adapter = DbUtility.GetDataAdapter(this.connectionDetail.AdapterType, select, connection);
if (paramArray.Count > 0)
{
adapter.SelectCommand.Parameters.AddRange(paramArray.ToArray());
}
var table = new DataTable(argument.TableName);
if (argument.LoadSchema)
{
adapter.FillSchema(table, SchemaType.Source);
}
adapter.Fill(table);
return table;
}
catch (Exception ex)
{
throw DbUtility.GetDbException(ex);
}
finally
{
if (connection != null)
{
connection.Close();
}
}
}));
}
