IDateEditSettings.NullValue Property

Specifies a null value for the date editor.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
DateTime NullValue { get; set; }

Property Value

Type	Description
DateTime	An object that specifies a null value.

Remarks

If a grid column is bound to the nullable type, use the NullValue property to override the column editor’s null value at runtime. Each time a user clears the editor’s content, the value is set to NullValue. If a grid column is bound to the regular (non-nullable) type, specify the NullValue property to allow users to clear column editor content.

You can use the NullText property to specify the prompt text displayed when the editor is set to a null value.

To specify the null value in markup, use the DxDateEditSettings.NullValue property.

The IDateEditSettings interface allows you to get and customize settings of a date editor at runtime. You can get editor settings in the following ways:

• Call the GetColumnEditSettings method to get editor settings of the column bound to the specified data source field.

  Important

  You need to enclose your code between BeginUpdate and EndUpdate method calls to change values of Grid component parameters outside the Grid component markup. Otherwise, an exception occurs.

  var dateEditSettings = e.Grid.GetColumnEditSettings<IDateEditSettings>("HireDate");
  if(dateEditSettings != null) {
      e.Grid.BeginUpdate();
      dateEditSettings.NullValue = new DateTime(2023, 01, 01);
      e.Grid.EndUpdate();
  }
  

• Handle the CustomizeFilterRowEditor event to customize a cell editor in the filter row.

  void Grid_CustomizeFilterRowEditor(GridCustomizeFilterRowEditorEventArgs e) {
      if(e.EditSettings is IDateEditSettings dateEditSettings)
          dateEditSettings.NullValue = new DateTime(2023, 01, 01);
  }
  

• Handle the CustomizeDataRowEditor event to customize a cell editor in a data row.

  void Grid_CustomizeDataRowEditor(GridCustomizeDataRowEditorEventArgs e) {
      if(e.EditSettings is IDateEditSettings dateEditSettings)
          dateEditSettings.NullValue = new DateTime(2023, 01, 01);
  }