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DataTable.ColumnChanging Event
.NET Framework 3.0
Occurs when a value is being changed for the specified DataColumn in a DataRow.
Namespace: System.Data
Assembly: System.Data (in system.data.dll)
DataTable Members
System.Data Namespace
Assembly: System.Data (in system.data.dll)
For more information, see Working with DataTable Events.
private static void DataTableColumnChanging() { DataTable custTable = new DataTable("Customers"); // add columns custTable.Columns.Add("id", typeof(int)); custTable.Columns.Add("name", typeof(string)); custTable.Columns.Add("address", typeof(string)); // set PrimaryKey custTable.Columns[ "id" ].Unique = true; custTable.PrimaryKey = new DataColumn[] { custTable.Columns["id"] }; // add a ColumnChanging event handler for the table. custTable.ColumnChanging += new DataColumnChangeEventHandler(Column_Changing ); // add ten rows for(int id=1; id<=10; id++) { custTable.Rows.Add( new object[] { id, string.Format( "customer{0}", id), string.Format("address{0}", id) }); } custTable.AcceptChanges(); // change the name column in all the rows foreach(DataRow row in custTable.Rows ) { row["name"] = string.Format("vip{0}", row["id"]); } } private static void Column_Changing(object sender, DataColumnChangeEventArgs e ) { Console.WriteLine( "Column_Changing Event: name={0}; Column={1}; proposed name={2}", e.Row["name"], e.Column.ColumnName, e.ProposedValue ); }
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Reference
DataTable ClassDataTable Members
System.Data Namespace
Other Resources
Creating and Using DataTablesCommunity Additions
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