/// <summary>
/// Read datatable from database with request parameters
/// </summary>
/// <param name="request">The request with all parameters</param>
/// <returns>A datatable filled with results</returns>
private DataTable GetDataTable(SqlRequest request)
{
// Reading data from database
TurboDBConnection conn = GetConnection(request.DataSourceName, request.DataSourcePassword);
TurboDBDataAdapter apt = new TurboDBDataAdapter(BuildSqlString(request), conn);
DataTable tb = new DataTable();
apt.Fill(tb);
return(tb);
}
/// <summary>
/// Executes the respective command for each inserted, updated, or deleted row in the DataSet.
/// </summary>
/// <remarks>
/// e.g.:
/// UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
/// </remarks>
/// <param name="insertCommand">A valid transact-SQL statement to insert new records into the data source</param>
/// <param name="deleteCommand">A valid transact-SQL statement to delete records from the data source</param>
/// <param name="updateCommand">A valid transact-SQL statement used to update records in the data source</param>
/// <param name="dataSet">The DataSet used to update the data source</param>
/// <param name="tableName">The DataTable used to update the data source.</param>
public static void UpdateDataset(TurboDBCommand insertCommand, TurboDBCommand deleteCommand, TurboDBCommand updateCommand, DataSet dataSet, string tableName)
{
if( insertCommand == null ) throw new ArgumentNullException( "insertCommand" );
if( deleteCommand == null ) throw new ArgumentNullException( "deleteCommand" );
if( updateCommand == null ) throw new ArgumentNullException( "updateCommand" );
if( tableName == null || tableName.Length == 0 ) throw new ArgumentNullException( "tableName" );
// Create a TurboDBDataAdapter, and dispose of it after we are done
TurboDBDataAdapter dataAdapter = new TurboDBDataAdapter();
try
{
// Set the data adapter commands
dataAdapter.UpdateCommand = updateCommand;
dataAdapter.InsertCommand = insertCommand;
dataAdapter.DeleteCommand = deleteCommand;
// Update the dataset changes in the data source
dataAdapter.Update (dataSet,tableName);
// Commit all the changes made to the DataSet
dataSet.AcceptChanges();
}
catch (TurboDBException E)
{string strError=E.Message;}
finally{dataAdapter.Dispose();}
}
/// <summary>
/// Execute a TurboDBCommand (that returns a resultset) against the specified TurboDBTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", new TurboDBParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">A valid TurboDBTransaction</param>
/// <param name="commandType">The CommandType (TableDirect, Text)</param>
/// <param name="commandText">The T-SQL command using "FOR XML AUTO"</param>
/// <param name="commandParameters">An array of TurboDBParamters used to execute the command</param>
/// <returns>An XmlReader containing the resultset generated by the command</returns>
public static string ExecuteXml(TurboDBTransaction transaction, CommandType commandType, string commandText, params TurboDBParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// // Create a command and prepare it for execution
TurboDBCommand cmd = new TurboDBCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, (TurboDBConnection)transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// Create the DataAdapter & DataSet
TurboDBDataAdapter obj_Adapter =new TurboDBDataAdapter (cmd);
DataSet ds=new DataSet();
ds.Locale =CultureInfo.InvariantCulture;
obj_Adapter.Fill(ds);
// Detach the TurboDBParameters from the command object, so they can be used again
cmd.Parameters.Clear();
string retval= ds.GetXml();
ds.Clear();
obj_Adapter.Dispose ();
return retval;
}
/// <summary>
/// Execute a TurboDBCommand (that returns a resultset) against the specified TurboDBConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// string r = ExecuteXml(conn, CommandType.Text, "Select * from TableTransaction where ProdId=?", new TurboDBParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">A valid TurboDBConnection</param>
/// <param name="commandType">The CommandType (TableDirect, Text)</param>
/// <param name="commandText">The T-SQL command using "FOR XML AUTO"</param>
/// <param name="commandParameters">An array of TurboDBParamters used to execute the command</param>
/// <returns>An string containing the resultset generated by the command</returns>
public static string ExecuteXml(TurboDBConnection connection, CommandType commandType, string commandText, params TurboDBParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
bool mustCloseConnection = false;
// Create a command and prepare it for execution
TurboDBCommand cmd = new TurboDBCommand();
try
{
PrepareCommand(cmd, connection, (TurboDBTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );
// Create the DataAdapter & DataSet
TurboDBDataAdapter obj_Adapter =new TurboDBDataAdapter (cmd);
DataSet ds=new DataSet();
ds.Locale =CultureInfo.InvariantCulture;
obj_Adapter.Fill(ds);
// Detach the TurboDBParameters from the command object, so they can be used again
cmd.Parameters.Clear();
string retval= ds.GetXml();
ds.Clear();
obj_Adapter.Dispose ();
return retval;
}
catch
{
if( mustCloseConnection )
connection.Close();
throw;
}
}
/// <summary>
/// Execute a TurboDBCommand (that returns a resultset) against the specified TurboDBTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", new TurboDBParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">A valid TurboDBTransaction</param>
/// <param name="commandType">The CommandType (TableDirect, Text)</param>
/// <param name="commandText">The T-SQL command</param>
/// <param name="commandParameters">An array of TurboDBParamters used to execute the command</param>
/// <returns>A dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(TurboDBTransaction transaction, CommandType commandType, string commandText, params TurboDBParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// Create a command and prepare it for execution
TurboDBCommand cmd = new TurboDBCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, (TurboDBConnection)transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
// Create the DataAdapter & DataSet
//using( TurboDBDataAdapter da = new TurboDBDataAdapter(cmd) )
TurboDBDataAdapter da = new TurboDBDataAdapter(cmd);
DataSet ds = new DataSet();
ds.Locale =CultureInfo.InvariantCulture;
// Fill the DataSet using default values for DataTable names, etc
da.Fill(ds);
// Detach the TurboDBParameters from the command object, so they can be used again
cmd.Parameters.Clear();
// Return the dataset
return ds;
}
/// <summary>
/// Private helper method that execute a TurboDBCommand (that returns a resultset) against the specified TurboDBTransaction and TurboDBConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// FillDataset(conn, trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", ds, new string[] {"orders"}, new TurboDBParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">A valid TurboDBConnection</param>
/// <param name="transaction">A valid TurboDBTransaction</param>
/// <param name="commandType">The CommandType (TableDirect, Text)</param>
/// <param name="commandText">The T-SQL command</param>
/// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
/// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
/// by a user defined name (probably the actual table name)
/// </param>
/// <param name="commandParameters">An array of TurboDBParamters used to execute the command</param>
private static void FillDataset(TurboDBConnection connection, TurboDBTransaction transaction, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params TurboDBParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
// Create a command and prepare it for execution
TurboDBCommand command = new TurboDBCommand();
bool mustCloseConnection = false;
PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// Create the DataAdapter & DataSet
TurboDBDataAdapter dataAdapter = new TurboDBDataAdapter(command);
try
{
// Add the table mappings specified by the user
if (tableNames != null && tableNames.Length > 0)
{
string tableName = "Table";
for (int index=0; index < tableNames.Length; index++)
{
if( tableNames[index] == null || tableNames[index].Length == 0 ) throw new ArgumentException( "The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames" );
dataAdapter.TableMappings.Add(tableName, tableNames[index]);
tableName += (index + 1).ToString();
}
}
// Fill the DataSet using default values for DataTable names, etc
dataAdapter.Fill(dataSet);
// Detach the TurboDBParameters from the command object, so they can be used again
command.Parameters.Clear();
if( mustCloseConnection )
connection.Close();
}
finally
{
dataAdapter.Dispose();
}
}
