Hi,
I have added a RadColorPicker control on xaml and binded (two way) its selected color property with a string. I am raising an error in cs file for it if some color is not matching with the predefined string. But it does not show any validation error (Red color box).
Please suggest any solution.

Thanks
Naveen

Hello 

I am getting following error when i select a color in ColorPicker.

"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

Any Suggestions?
Kris

 

I have a datagrid with colopicker inside CellTemplate.
<controls:ChildWindow>
            <sdk:DataGrid  Grid.Row="1"
        ItemsSource="{Binding ColumnColors}"
        x:Name="dgColors" IsReadOnly="True"
        SelectionMode="Extended"
        AutoGenerateColumns="False" GridLinesVisibility="All">
                <sdk:DataGrid.Columns>
    <sdk:DataGridTemplateColumn Width="Auto" MinWidth="200" Extensions:GridColumnExtentions.BindableTitle="{Binding DisplayValue, Converter={StaticResource _localizationKeysConverter}, Source={StaticResource _LocalizationKeys}}">
                        <sdk:DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <telerik:RadColorPicker
            Grid.Column="1" Grid.Row="5" Margin="5,0,5,5"
            AutomaticColor="Transparent"
            NoColorText="{Binding ResetColor, Converter={StaticResource _localizationKeysConverter}, Source={StaticResource _LocalizationKeys}}"  
            SelectedColor="{Binding ColorBrush, Mode=TwoWay}"
          
            VerticalAlignment="Stretch"   
            Visibility="{Binding IsOneColumnChart, Converter={StaticResource _booleanToVisibilityConverter}}" Style="{StaticResource RadColorPickerStyle1}"/>
                            </DataTemplate>
                        </sdk:DataGridTemplateColumn.CellTemplate>
                    </sdk:DataGridTemplateColumn>
        </sdk:DataGrid.Columns>
  </sdk:DataGrid>
</controls:ChildWindow>
When I try to expand color picker, Exception thrown.
Error:
Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.NullReferenceException: Object reference not set to an
instance of an object.
at MS.Internal.XcpImports.MethodEx(IntPtr ptr, String name, CValue[]
cvData)
at MS.Internal.XcpImports.MethodEx(DependencyObject obj, String name)
at MS.Internal.XcpImports.UIElement_UpdateLayout(UIElement element)
at Telerik.Windows.Controls.PopupWrapper.AdjustPopupLocation()
at Telerik.Windows.Controls.PopupWrapper.OnPopupOpened(Object sender,
EventArgs e)
at MS.Internal.CoreInvokeHandler.InvokeEventHandler(UInt32 typeIndex,
Delegate handlerDelegate, Object sender, Object args)
at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr
unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String
eventName, UInt32 flags)

I have a ColorPircker on a ToolBar bound  to a string property.  Everything is working as expected, but I noticed an uncaught exception being thrown in one of the Telerik dlls. Here it is:

A first chance exception of type 'System.NullReferenceException' occurred in Telerik.Windows.Controls

I've verified that the string is never null, so I am assuming this is coming from inside the Controls dll.  Has anyone else noticed this before?

-Scott

I see the offical demo Demo about ColorPicker FirstLook , the first colorpicker set IsRecentColorsActive true,but it's not working .

then i do it myself , the bug is confirmed.

Hi, when the palette is populated with a large number of colours it seems every 7th colour (vertically) has a larger gap below it. This produces a messy looking palette.

This applies to our HighlightColorPicker controls but the regular ColorPicker controls in the Table border and background dialogs are fine.

We are only setting a few things as below. Are there some defaults that I am missing which might help? I've tried looking at the objects in debug mode but can't see anything obvious. I've tried adjusting the data template, but it seems this only impacts the item inside each square (i.e. setting margin will produce a space between the containing square and the colour rectangle).

We are running on 2013.2 so let me know if we should update to fix this. Thanks.

Code (table controls):
colorSelector.AutomaticColor = Colors.Transparent;
colorSelector.ColorPropertyPath = "CustomColor";
colorSelector.HeaderPaletteVisibility = Visibility.Collapsed;
colorSelector.StandardPaletteVisibility = Visibility.Collapsed;
colorSelector.NoColorVisibility = Visibility.Collapsed; 
colorSelector.MainPaletteHeaderText = "My Colours";
colorSelector.PaletteItemsTemplate = this.ColorPickerDataTemplate;

XAML (HighlightColorPicker):

<ColorPickers:HighlightColorPicker Name="fontColorPicker"
                                                  ColorPropertyPath="CustomColor"
                                                  HeaderPaletteVisibility="Collapsed"
                                                  StandardPaletteVisibility="Collapsed"
                                                  MainPaletteHeaderText="My Colours"
                                                  NoColorVisibility="Collapsed"
                                                  PaletteItemsTemplate="{StaticResource ColorPickerTemplate}"
                                                  Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/FontForeColor.png"
                                                  telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeFontForeColorCommand}"
                                                  />

I have successfully used a solution provided in this forum to remove the ARGB tooltip from the main palette of a ColorPicker (http://www.telerik.com/community/forums/silverlight/colorpicker/remove-palette-item-tooltip.aspx).  However, I also need to remove the tooltips from the header and standard palettes.  The solution provided in the earlier thread does not work for me, as I have three separate ribbon buttons using the ColorPicker style.  They all need different images which I am providing, but when I apply the colorpickerStyle from the solution, the custom images are lost and the ColorPicker fails to open when clicking the dropdown, crashing the editor.

Here is my relevant XAML, using the styles provided in the above solution:

Thanks for your help!
David Magill
Virtify, Inc.

Hi

I am trying to style the colorpicker to use a custom image instead of the "A" that is displayed.
Atatched is the sample xaml and image that has details of what i am trying to do.

could you please help me in getting the bucket fill image inside the colorpicker??

thanks,
Vipin

Is there an example of how to use the ColorPicker and ColorEditor combined to provide a basic color selection capability with an optional advanced mode for custom colors?

Hi All,

I need color picker with No Color option in silverlight. same as RadColor picker of Ajax(Please find attched image).

No color option should return "Null" value.

Thanks and Regards,
Ruchi Patel