Name

ColumnChanged

Synopsis

DataColumnChangeEventHandler ColumnChanged;

The ColumnChanged event is raised after the value for a column in the DataRow has been changed.

Example

The following code demonstrates how to handle the ColumnChanged event:

DataTable dt = new DataTable();

dt.ColumnChanged += new DataColumnChangeEventHandler(dt_ColumnChanged);



private void dt_ColumnChanged(object sender,

    DataColumnChangeEventArgs e)

{

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

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

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

}

Notes

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

Table 23-13. DataColumnChangeEventArgs properties

Property	Description
Column	Returns a reference to the DataColumn that changes.
ProposedValue	Gets or sets a reference to an object representing the proposed value for the column.
Row	Returns a reference to the DataRow of the column that changes.