IndexOf Method (String, String)
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DataTableCollection.IndexOf Method (String, String)

Note: This method is new in the .NET Framework version 2.0.

Gets the index in the collection of the specified DataTable object.

Namespace: System.Data
Assembly: System.Data (in

public int IndexOf (
	string tableName,
	string tableNamespace
public int IndexOf (
	String tableName, 
	String tableNamespace
public function IndexOf (
	tableName : String, 
	tableNamespace : String
) : int



The name of the DataTable object to look for.


The name of the DataTable namespace to look in.

Return Value

The zero-based index of the DataTable with the specified name, or -1 if the table does not exist in the collection.

You specify the name of the DataTable object by using the TableName property.

The following example returns the index of a named table in the DataTableCollection.

private void GetIndexes()
    // Get the DataSet of a DataGrid.
    DataSet thisDataSet = (DataSet)DataGrid1.DataSource;

    // Get the DataTableCollection through the Tables property.
    DataTableCollection tables = thisDataSet.Tables;

    // Get the index of the table named "Authors", if it exists.
    if (tables.Contains("Authors"))

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

.NET Compact Framework

Supported in: 2.0

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