Filtering ListView

[Tino]

Quick question about filtering. I have a ListView with several columns including a checkbox column. I want to filter the listview on one column ("Title'), based on a textbox value as the user types. I thought the below might work, but it doesn't seem to work, the filtering doesn't look right. Please tell me why this approach doesn't work. Thanks.

Code to add the filter:

private FilterDescriptor _valueFilter;

_valueFilter = new FilterDescriptor("Title", FilterOperator.Contains, "");
lstvwLookups.FilterDescriptors.Add(_valueFilter);

 

Code to update the filter:

private void txtFilter_TextChanged(object sender, EventArgs e)
{
    _valueFilter.Value = ((TextBoxChangedEventArgs)e).Text;
}

[Tino]

Never mind, I found the error. I was filtering on e.Text instead of sender (as RadTextBoxControl) Text.

[Dess | Tech Support Engineer, Principal]

Hello, Tino,     

I am glad that the problem you were facing is now resolved. Additional information about the filtering functionality in RadListView is available in the following help article: https://docs.telerik.com/devtools/winforms/listview/features/filtering

You can also have a look at the Demo application >> ListView >> First look example which provides a filter box as well.

I hope this information helps. If you have any additional questions, please let me know. 

Regards,
Dess
Progress Telerik

[Tino]

Thanks yes I saw that of course but it doesn't show a filter-as-you-type sample which is what I was after.

[Dess | Tech Support Engineer, Principal]

Hello, Tino,     

In the Demo application >> ListView >> First look example there is a filter box which demonstrates a filter as you type example which uses the FilterDescriptor instance to perform filtering. 

I hope this information helps. If you have any additional questions, please let me know. 

Regards,
Dess
Progress Telerik

[Arun]

Hi, 

I have tried this following code to filter the listview on Enter event of the textbox. But it's not filtering. Can you please help to resolve please?

Private Sub radTxtSearch_KeyDown(sender As Object, e As KeyEventArgs) Handles radTxtSearch.KeyDown
        If e.KeyCode = Keys.Enter Then
            radLstDetails.EnableFiltering = True
            Dim typeFilter As New FilterDescriptor("Column 4", FilterOperator.Contains, radTxtSearch.Text)
            radLstDetails.FilterDescriptors.Add(typeFilter)
            radLstDetails.ListViewElement.DataView.Refresh()
        End If
    End Sub

[Dess | Tech Support Engineer, Principal]

Hello, Arun,  

Following the provided code snippet I have prepared a sample project to test the behavior on my end. Filtering RadListView works as expected. Please refer to the attached gif file. However, I have added clearing the FilterDescriptors collection before adding a new FilterDescriptor.

Please give the attached sample project a try and see how it works on your end.

I hope this information helps. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik