protected override object CreateInstance(Type itemType)
{
object[] items = base.GetItems(null);
int i = 1;
while (true)
{
bool found = false;
foreach (object obj in items)
{
MySqlParameter p = (MySqlParameter)obj;
if (p.ParameterName.Equals( "parameter" + i ))
{
found = true;
break;
}
}
if (! found) break;
i ++;
}
MySqlParameter parm = new MySqlParameter("parameter"+i, MySqlDbType.VarChar);
return parm;
}
/// <summary>
/// Executes a single command against a MySQL database, possibly inside an existing transaction.
/// </summary>
/// <param name="connection"><see cref="MySqlConnection"/> object to use for the command</param>
/// <param name="transaction"><see cref="MySqlTransaction"/> object to use for the command</param>
/// <param name="commandText">Command text to use</param>
/// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
/// <param name="ExternalConn">True if the connection should be preserved, false if not</param>
/// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
private static MySqlDataReader ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, string commandText, MySqlParameter[] commandParameters, bool ExternalConn )
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = connection;
cmd.Transaction = transaction;
cmd.CommandText = commandText;
cmd.CommandType = CommandType.Text;
if (commandParameters != null)
foreach (MySqlParameter p in commandParameters)
cmd.Parameters.Add( p );
//create a reader
MySqlDataReader dr;
// call ExecuteReader with the appropriate CommandBehavior
if (ExternalConn)
{
dr = cmd.ExecuteReader();
}
else
{
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
// detach the SqlParameters from the command object, so they can be used again.
cmd.Parameters.Clear();
return dr;
}
private MySqlParameter CreateParameter(DataRow row, bool Original)
{
MySqlParameter p;
if (Original)
p = new MySqlParameter( "@Original_" + (string)row["ColumnName"], (MySqlDbType)row["ProviderType"],
ParameterDirection.Input, (string)row["ColumnName"], DataRowVersion.Original, DBNull.Value );
else
p = new MySqlParameter( "@" + (string)row["ColumnName"], (MySqlDbType)row["ProviderType"],
ParameterDirection.Input, (string)row["ColumnName"], DataRowVersion.Current, DBNull.Value );
return p;
}
object System.ICloneable.Clone()
{
MySqlParameter clone = new MySqlParameter( paramName, dbType, direction,
sourceColumn, sourceVersion, paramValue );
return clone;
}
/// <summary>
/// Adds the specified <see cref="MySqlParameter"/> object to the <see cref="MySqlParameterCollection"/>.
/// </summary>
/// <param name="value">The <see cref="MySqlParameter"/> to add to the collection.</param>
/// <returns>The index of the new <see cref="MySqlParameter"/> object.</returns>
public MySqlParameter Add(MySqlParameter value)
{
if ( value.ParameterName == null ) throw new ArgumentException("parameter must be named");
_parms.Add(value);
return value;
}
