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Pre-Filter not working

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GridView

This is a migrated thread and some comments may be shown as answers.

Håkan asked on 22 Nov 2013, 08:49 AM

Hi!

I have a GridView that I want to pre-filter with checkboxes.
I have read a blog about this here
http://blogs.telerik.com/xamlteam/posts/09-11-27/pre-filtering-radgridview-for-silverlight.aspx
with the following code:

ColumnFilterDescriptor countryColumnFilter = new ColumnFilterDescriptor((IDataFieldDescriptor)this.playersGrid.Columns[2]);

countryColumnFilter.DistinctFilter.DistinctValues.Add("England");

countryColumnFilter.DistinctFilter.DistinctValues.Add("Spain");

this.playersGrid.FilterDescriptors.Add(countryColumnFilter);

The problem is that I get an error saying that "Cannot create an instance of the abstract class or interface "Telerik.Windows.Controls.GridView.ColumnFilterDescriptor".

Its pretty old code so I guess this has changed, but how do I do to make it work now?
I use the last Silverlight 4 version.

Regards,
Håkan

2 Answers, 1 is accepted

Accepted

answered on 22 Nov 2013, 05:05 PM

Hello Håkan,

Actually, the mentioned forum post is quite old. Please check the following code snippet which demonstrates how to add ColumnFilterDescriptor:

Telerik.Windows.Controls.GridViewColumn countryColumn = this.clubsGrid.Columns["Name"];

Telerik.Windows.Controls.GridView.IColumnFilterDescriptor countryFilter = countryColumn.ColumnFilterDescriptor;

countryFilter.SuspendNotifications();

// This is the same as the end user selecting a distinct value through the UI.

countryFilter.DistinctFilter.AddDistinctValue("Arsenal");

countryFilter.DistinctFilter.AddDistinctValue("Spain");

countryFilter.DistinctFilter.AddDistinctValue("Uzbekistan");

countryFilter.DistinctFilter.AddDistinctValue("Netherlands");

countryFilter.DistinctFilter.AddDistinctValue("Austria");

countryFilter.DistinctFilter.AddDistinctValue("Finland");

countryFilter.DistinctFilter.AddDistinctValue("Pakistan");

// Resume the notifications to force the data engine to update the filter.

countryFilter.ResumeNotifications();

I strongly recommend you to take a look at this help article as well.

As a side note I must mention that the support for WPF 3.5 and Silverlight 4 has been discontinued as of Q3 2012. You can check this blog post for more information.

Regards,
Yoan
Telerik

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