ToString Method

DataColumn.ToString Method

Gets the Expression of the column, if one exists.

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

public override string ToString ()
public String ToString ()
public override function ToString () : String
Not applicable.

Return Value

The Expression value, if the property is set; otherwise, the ColumnName property.

The following example uses the ToString property to return the default string of each member of a collection of DataColumn objects.

private void PrintColumns(DataTable table)
    // Print the default string of each column in a collection.
    foreach(DataColumn column in table.Columns)

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.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

Community Additions

© 2015 Microsoft