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

SqlBooleantrue 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
Available since 1.1
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