DataGridBoolColumn.AllowNull Property

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets a value indicating whether null values are allowed.

public:
 property bool AllowNull { bool get(); void set(bool value); };

public bool AllowNull { get; set; }

member this.AllowNull : bool with get, set

Public Property AllowNull As Boolean

Property Value

Boolean

true if null values are allowed, otherwise, false. The default is true.

Examples

The following code example sets the AllowNull property.

void SetAllowNull()
{
   DataGridBoolColumn^ myGridColumn = dynamic_cast<DataGridBoolColumn^>(dataGrid1->TableStyles[ 0 ]->GridColumnStyles[ 0 ]);
   myGridColumn->AllowNull = false;
}

private void SetAllowNull(){
    DataGridBoolColumn myGridColumn = (DataGridBoolColumn)dataGrid1.TableStyles[0].GridColumnStyles[0];
    myGridColumn.AllowNull = false;
 }

Private Sub SetAllowNull()
    Dim myGridColumn As DataGridBoolColumn = CType(dataGrid1.TableStyles(0).GridColumnStyles(0), DataGridBoolColumn)
    myGridColumn.AllowNull = False
End Sub

Remarks

When this property is set to false, the check boxes in the column have only two states: checked (true) and unchecked (false).

Applies to

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