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DataRow.IsNull Method (DataColumn)

Gets a value that indicates whether the specified DataColumn contains a null value.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

public bool IsNull (
	DataColumn column
)
public boolean IsNull (
	DataColumn column
)
public function IsNull (
	column : DataColumn
) : boolean

Parameters

column

A DataColumn.

Return Value

true if the column contains a null value; otherwise, false.

The following example prints each column of each row in each table of a DataSet. If the row is set to a null value, the value is not printed.

Private Sub PrintRows(dataSet As DataSet)
    Dim table As DataTable
    Dim column As DataColumn
    Dim row As DataRow
    For Each table In dataSet.Tables
       For Each row In table.Rows
          For Each column In table.Columns
             If Not row.IsNull(column) Then 
                Console.WriteLine(row(column).ToString())
             End If
          Next column
       Next row
     Next table
End Sub

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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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