System.Data Namespace   DataColumnCollection Class

Returns the index of a DataColumn with the specified name.

[ VB ]
Overloads Public Function IndexOf ( _
   ByVal columnName As String _
) As Integer

[ C# ]
public int IndexOf (
   String columnName
);

[ C++ ]
public: int IndexOf (
   String* columnName
);

[ JScript ]
public function IndexOf (
   columnName : String
) : int

columnName

The name of the DataColumn to find.

The index of the DataColumn if it is in the collection; otherwise, -1.

Use the IndexOf method to determine the index of a given column.

Before calling IndexOf, you can test for the existence of a column by using the Contains method.

The following example returns the index of a named column in a DataColumnCollection.

private void GetIndexes ( DataTable myTable ) {
   DataColumnCollection myCols = myTable.Columns;
   // get the index of the column named "City", if it exists.
   if ( myCols.Contains ( "City" ) ) {
      Response.Write ( myCols.IndexOf ( "City" ) );
   }
}

Private Sub GetIndexes ( ByVal myTable As DataTable )
   Dim myCols As DataColumnCollection = myTable.Columns
   ' get the index of the column named "City", if it exists.
   If myCols.Contains ( "City" ) Then
      Response.Write ( myCols.IndexOf ( "City" ) )
   End If
End Sub

DataColumnCollection Members   DataColumnCollection.IndexOf Overload List   Contains