UpdateCommand Property (MySqlDataTable)
Gets or sets a MySQL statement used to update records in the data source.
'Declaration
Public Shadows Property UpdateCommand As MySqlCommand
Property Value
A
MySqlCommand used during an update operation to update records in the data source that correspond to modified rows in the
System.Data.DataSet.
This sample shows how to modify and display data using
MySqlDataTable.
public void UseDataTable(MySqlConnection myConnection)
{
MySqlDataTable myDataTable = new MySqlDataTable("SELECT * FROM Test.Dept", myConnection);
try
{
myDataTable.Active = true;
myDataTable.Rows[3]["DName"] = "Researches";
myDataTable.UpdateCommand = new MySqlCommand("UPDATE Test.Dept SET DeptNo = :DeptNo, DName = :DName, Loc = 'Modified' " +
"WHERE DeptNo = :oldDeptNo", myConnection);
myDataTable.UpdateCommand.Parameters.Add("DeptNo", MySqlType.Int, 0, "DeptNo");
myDataTable.UpdateCommand.Parameters.Add("DName", MySqlType.VarChar, 15, "DName");
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", MySqlType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original;
Console.WriteLine(myDataTable.Update()+" rows updated.");
myDataTable.Active = false;
//Refresh the table to check custom updates
myDataTable.Active = true;
foreach(DataRow myRow in myDataTable.Rows)
{
foreach(DataColumn myCol in myDataTable.Columns)
{
Console.Write(myRow[myCol]+"\t");
}
Console.WriteLine();
}
}
finally
{
myDataTable.Active = false;
}
}
Public Sub UseDataTable(ByVal myConnection As MySqlConnection)
Dim myDataTable As MySqlDataTable = New MySqlDataTable("SELECT * FROM Test.Dept", myConnection)
Try
myDataTable.Active = True
myDataTable.Rows(3)("DName") = "Researches"
myDataTable.UpdateCommand = New MySqlCommand("UPDATE Test.Dept SET DeptNo = :DeptNo, DName = :DName, Loc='Modified' " & _
"WHERE DeptNo = :oldDeptNo", myConnection)
myDataTable.UpdateCommand.Parameters.Add("DeptNo", MySqlType.Int, 0, "DeptNo")
myDataTable.UpdateCommand.Parameters.Add("DName", MySqlType.VarChar, 15, "DName")
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", MySqlType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original
Console.WriteLine(myDataTable.Update() & " rows updated.")
myDataTable.Active = False
' Refresh the table to check custom updates
myDataTable.Active = True
Dim myRow As DataRow
Dim myCol As DataColumn
For Each myRow In myDataTable.Rows
For Each myCol In myDataTable.Columns
Console.Write(myRow(myCol) & Chr(9))
Next myCol
Console.WriteLine()
Next myRow
Finally
myDataTable.Active = False
End Try
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2