CODEWITHSUNDEEP
wpfdatagridwpfdatagrid
HCL
HCL

Reputation: 36775

Prevent DataGrid row from being deleted

I want to protect some rows of a DataGrid to be protected from deletion by the user, although the property CanUserDeleteRows is set to true.

Is there a possibility to protect some rows, hopefully through a databinding or a trigger? The ItemsSource is bound to an ObservableCollection of T.

Upvotes: 11

Views: 8751

Answers (2)

ChrisNel52
ChrisNel52

Reputation: 15153

If you have a property on your bound objects that can be used to determine if the current row can be deleted , like 'IsDeleteEnabled', then you can bind the DataGrid's CanUserDeleteRows property to SelectedItem.IsDeleteEnabled.

For example,

<DataGrid Name="dataGrid1" 
        CanUserDeleteRows="{Binding ElementName=dataGrid1, Path=SelectedItem.IsDeleteEnabled}"

Upvotes: 17

Josh
Josh

Reputation: 2975

Never done this with a DataGrid. Usually, when I need to control something like this, I use a ListBox and a DataTemplate with a Grid within to give it the idea of a Grid or a ListView with a GridView in the template because they both give you more control over the interaction.

A shot in the dark, since you're binding, you could use a DataGridTemplateColumn.CellEditingTemplate and make your own Delete button/text which is visible or enabled based off logic within your binding object. Maybe something like this (I didn't test this, but it should be a direction you can head)?

<dg:DataGridTemplateColumn Header="Action">
    <dg:DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <Text Content="Delete" />
        </DataTemplate>
    </dg:DataGridTemplateColumn.CellTemplate>

    <dg:DataGridTemplateColumn.CellEditingTemplate>
        <DataTemplate>
            <ButtonEnabled="{Binding Path=IsDeleteEnabled, Mode=OneWay}" Content="Delete" Command="{Binding Path=DeleteMe}" />
        </DataTemplate>
    </dg:DataGridTemplateColumn.CellEditingTemplate>
</dg:DataGridTemplateColumn>

Using this method, since the command is bound to the individual object, you would probably have to raise an event your screen's ViewModel handles to remove that row from the ObservableCollection.

Again, not sure if this is the best way, but it's my 10 minute stab at it. So if it's horrible, please don't vote me down too much.

Upvotes: 0

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