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Adding custom filter properties to default GridView column filter

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GridView

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

Martin asked on 24 Jun 2020, 02:47 PM

I want to create custom filter properties for my column in the RadGridView, similar to the example given here: https://docs.telerik.com/devtools/winforms/controls/gridview/filtering/excel-like-filtering#customizing-excel-like-filtering-popup

What I have is a column with bool values that are converted to icons. I want to create a column filter where I have custom provided names for the properties which represents the bool values. According to this: https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/how-to/howto-customize-the-default-field-filter-editor a plain TextBox will be shown for a bool column, but I would like to show a StringFilterEditor with my own values for true and false. I would prefer to do this without creating a custom template.

Is this possible?

Thanks in advance

4 Answers, 1 is accepted

answered on 29 Jun 2020, 03:05 PM

column-filter.png

This is how the column that I have is defined:

<telerik:GridViewDataColumn
DataMemberBinding="{Binding ReminderPassed, Mode=OneWay, Converter={StaticResource BoolToColumnFilterTextConverter}}"
x:Name="ReminderIcon"
CellStyle="{StaticResource IncidentListTextEffects}"
Header=""
FilterMemberPath="ReminderPassed"
IsReadOnly="True"
IsVisible="{Binding IsTemplateList, Converter={StaticResource InvertBoolConverter}}"
SortMemberPath="RemindAtLocal">
<telerik:GridViewDataColumn.CellTemplate>
<DataTemplate>
<TextBlock
Margin="2,0"
Padding="0"
FontFamily="{StaticResource TelerikWebUI}"
Text="{StaticResource GlyphWarning}">
<TextBlock.Visibility>
<MultiBinding>
<MultiBinding.Converter>
<valueConverters:CompareDateTimeToVisibilityConverter />
</MultiBinding.Converter>
<Binding Mode="OneWay" Path="RemindAtLocal" />
<Binding
Mode="OneWay"
Path="Now"
Source="{StaticResource DateTimeNowTicker}" />
</MultiBinding>
</TextBlock.Visibility>
</TextBlock>
</DataTemplate>
</telerik:GridViewDataColumn.CellTemplate>
</telerik:GridViewDataColumn>

It is bound to a bool value which is converted to a string. This solved the problem of showing the StringFilterEditor. Now the problem is that the filter values are "True" and "False" instead of what the converter is returning (see the attached file for a visual of how it looks).

And here is my converter:

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace NTS.Client.Features.Incidents.ValueConverters
{
class BoolToColumnFilterTextConverter : IValueConverter
{
/// <summary>
/// This converter is used for the filtering of the ReminderIcon column in the incident list
/// It is needed to display the correct names for the checkboxes in the filter list
/// </summary>
/// <param name="values"></param>
/// <param name="targetType"></param>
/// <param name="parameter"></param>
/// <param name="culture"></param>
/// <returns></returns>
public object Convert(object obj, Type targetType, object parameter, CultureInfo culture)
{

bool reminderPassed = (bool)obj;

if(obj == null || reminderPassed)
{
return "Påminnelsetid passerad";
}
else
{
return "Påminnelsetid inte passerad";
}

}

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
}

I want the strings returned by the converter to show up in the column filter. How do I do that?

Thanks :)