/// <summary>
/// NewDataReader
/// </summary>
public static IWhizzDataReader NewDataReader(IDataReader reader, string name, DataStorageType storageType)
{
IWhizzDataReader dataReader = null;
switch (storageType)
{
case DataStorageType.Firebird:
dataReader = new FirebirdDataReader(reader, name);
break;
case DataStorageType.SQLServer:
dataReader = new SQLServerDataReader(reader, name);
break;
}
return dataReader;
}
/// <summary>
/// Executes the current command and returns a SafeDataReader
/// so the caller can iterate through the returned data.
/// </summary>
public IWhizzDataReader ExecuteReader()
{
CheckDisposedState();
//Make sure if the user tries to open a second DataReader on the same
//connection that we throw an exception. This is probably due to a
//programming error which needs to be fixed.
if (this.DataReader != null)
{
throw new Exception();
}
FbDataReader reader = null;
try
{
// Execute the reader...
reader = this.Command.ExecuteReader();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
// Make it safe...
this.DataReader = new FirebirdDataReader(reader, this.connection.Database);
// Return...
return this.DataReader;
}
/// <summary>
/// Executes the current command and returns a SafeDataReader
/// so the caller can iterate through the returned data.
/// Specifies a timeout value, in seconds...
/// </summary>
public IWhizzDataReader ExecuteReader(int timeOut)
{
CheckDisposedState();
//Make sure if the user tries to open a second DataReader on the same
//connection that we throw an exception. This is probably due to a
//programming error which needs to be fixed.
if (this.DataReader != null)
{
throw new Exception();
}
//Execute the datareader and store a reference so that we can close
//the reader gracefully in the future.
// Set the timeout...
this.Command.CommandTimeout = timeOut;
FbDataReader reader = null;
try
{
// Execute the reader...
reader = this.Command.ExecuteReader();
}
catch (ThreadAbortException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
// Make it safe...
this.DataReader = new FirebirdDataReader(reader, this.connection.Database);
// Return...
return this.DataReader;
}
/// <summary>
/// Checks if the data reader object of this FirebirdDBProvider is disposed and, if not, closes it and disposes it.
/// This is needed for code that plans to execute a reader more than once on the same provider object, as
/// this FirebirdDBProvider only allows one instance of a reader to exist at a time.
/// </summary>
public void CloseDataReader()
{
if (this.DataReader != null)
{
this.DataReader.Dispose();
this.DataReader = null;
}
}