Name

ColumnChanging

Synopsis

DataColumnChangeEventHandler ColumnChanging;

The ColumnChanging event is raised when the value for column in the DataRow is being changed.

Example

The following code demonstrates how to handle the ColumnChanging event:

DataTable dt = new DataTable();

dt.ColumnChanging += new DataColumnChangeEventHandler(dt_ColumnChanging);



private void dt_ColumnChanging(object sender,

    DataColumnChangeEventArgs e)

{

    MessageBox.Show("ColumnChanging: Name = " + e.Column.ColumnName + "; "  +

        "ProposedValue = " + e.ProposedValue.ToString() + "; " +

        "Row Id = " + e.Row["Id"].ToString());

}

Note

The event handler receives an argument of type DataColumnChangeEventArgs, which contains properties that provide specific information about the event as described in Table 23-13.