How to Disable Edit Mode for Cells and Columns in WPF DataGrid?
In WPF DataGrid, you can disable editing for particular columns by setting the AllowEditing property to False. Also you can disable editing for particular cells by handling the CurrentCellBeginEdit event.
In the CurrentCellBeginEdit event, you can cancel the Edit mode for certain cells by setting the Cancel property to True. In the following code, the Edit mode is disabled for the cells if the value is null.
C#
this.datagrid.CurrentCellBeginEdit += datagrid_CurrentCellBeginEdit;
private void datagrid_CurrentCellBeginEdit(object sender, CurrentCellBeginEditEventArgs args)
{
var recordindex = this.datagrid.ResolveToRecordIndex
(args.RowColumnIndex.RowIndex);
if (recordindex >= 0)
{
var reflector = this.datagrid.View.GetPropertyAccessProvider();
var recorddata = this.datagrid.View.GroupDescriptions.Count > 0 ? this.datagrid.View.Records[recordindex] :
this.datagrid.View.TopLevelGroup.DisplayElements[recordindex] as RecordEntry;
var value = reflector.GetValue(recorddata.Data, args.Column.MappingName);
if (value == null)
args.Cancel = true;
}
}
The following example has disabled Edit mode for cells using the CurrentCellBeginEdit event. For differentiating the Edit mode disabled cells, you can set separate background color for those cells by customizing styles for GridCell. Here, you can change the background property of the GridCell based on value, using CellBackgroundConverter.
Refer the following code snippet to apply GridCell Style.
XAML
<Window.Resources>
<local:CellBackgroundConverter x:Key="cellbackgroundconverter"/>
</Window.Resources>
<syncfusion:GridTextColumn MappingName="EmployeeDesignation" >
<syncfusion:GridTextColumn.CellStyle>
<Style TargetType="syncfusion:GridCell">
<Setter Property="Background"
Value="{Binding EmployeeDesignation,
Converter = {StaticResource cellbackgroundconverter}}" />
</Style>
</syncfusion:GridTextColumn.CellStyle>
</syncfusion:GridTextColumn>
Here, if the value of the cell is null, it means you have applied the background color Gray. The following code snippet for CellBackgroundConverter.
C#
public class CellBackgroundConverter : IValueConverter
{
public object Convert(object value, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
if ( value==null)
return Brushes.Gray;
return DependencyProperty.UnsetValue;
}
public object ConvertBack(object value, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
The following screenshot displays the difference between the Normal and Edit mode disabled cells.
You can refer to the following samples to display the edit mode for cells in SfDataGrid with different background for the disabled cells.
WPF: DisableEditmode_WPF
Conclusion
I hope you enjoyed learning about how to disable edit mode for cells and columns in WPF DataGrid.
You can refer to our WPF Grid feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WPF Grid example to understand how to create and manipulate data.
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