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Change row style when field value is null

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GridView
This is a migrated thread and some comments may be shown as answers.
Orit
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Orit asked on 23 Jun 2009, 10:29 AM
Hi

I want to change the style of a row when some fiekd is null
here is my code
<telerik:RadGridView.Resources>   
<Style TargetType="{x:Type telerik:GridViewRow}">  
<Style.Triggers> 
<DataTrigger Binding="{Binding Path=ParentID}" Value="NULL">  
<DataTrigger.Setters> 
<Setter Property="FontSize" Value="14" /> 
<Setter Property="FontWeight" Value="Bold" /> 
</DataTrigger.Setters> 
</DataTrigger> 
</Style.Triggers> 
</Style> 
</telerik:RadGridView.Resources> 
it doesnt work.

thanks.

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Rossen Hristov
Telerik team
answered on 23 Jun 2009, 12:50 PM
Hi Orit,

You will need to use the x:Null Markup Extension. "NULL" is simply the string "NULL" and has no special meaning to the compiler. Here is how to do this:

<Window x:Class="Ticket209422_RowStyleAccordingToDataItem.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
    Title="Window1" Height="300" Width="300"
    <Grid> 
        <telerik:RadGridView Name="RadGridView1" ColumnsWidthMode="Auto"
            <telerik:RadGridView.Resources> 
                <Style TargetType="{x:Type telerik:GridViewRow}"
                    <Style.Triggers> 
                        <DataTrigger Binding="{Binding Path=DigitalSignature}" Value="{x:Null}"
                            <DataTrigger.Setters> 
                                <Setter Property="Background" Value="Red" /> 
                                <Setter Property="FontSize" Value="14" /> 
                            </DataTrigger.Setters> 
                        </DataTrigger> 
                    </Style.Triggers> 
                </Style> 
            </telerik:RadGridView.Resources> 
        </telerik:RadGridView> 
    </Grid> 
</Window> 
 

I have prepared a small sample project that demonstrates this. Please, examine the sample and let me know if you have any other questions.

All the best,
Ross
the Telerik team

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Orit
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Rossen Hristov
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