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INullable::IsNull Property

Indicates whether a structure is null. This property is read-only.

Namespace:  System.Data.SqlTypes
Assembly:  System.Data (in System.Data.dll)

property bool IsNull {
	bool get ();
}

Property Value

Type: System::Boolean
SqlBoolean true if the value of this object is null. Otherwise, false.

The default value for any System.Data.SqlTypes instance is null. Use IsNull property to test for null values.

The following code example creates a DataTable with two columns defined as SqlInt32 and SqlString. The code adds one row of known values, one row of null values and then iterates through the DataTable, assigning the values to variables and displaying the output in the console window.

No code example is currently available or this language may not be supported.

This example displays the following results:

isColumnNull=False, ID=123, Description=Side Mirror
isColumnNull=True, ID=Null, Description=Null

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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