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DataColumn.ToString Method

Gets the Expression of the column, if one exists.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)
public override string ToString()

Return Value

Type: System.String
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)
    {
        Console.WriteLine(column.ToString());
    }
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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