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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
)

Parameters

column
Type: System.Data.DataColumn
A DataColumn.

Return Value

Type: System.Boolean
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


.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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