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[Solved] Validation problem
Hi,

I have a MVVM application which showed a strange behavior.
To reproduce it I "switched to event mode" which has:

<telerik:RadGridView Grid.Row="1" ItemsSource="{Binding Bearings}" AutoGenerateColumns="False" ShowInsertRow="True" ShowGroupPanel="False" RowValidating="RadGridView_RowValidating" CanUserDeleteRows="True" CanUserInsertRows="True">
        <telerik:RadGridView.Columns>
            <telerik:GridViewDataColumn  Header="Ordnungszahl" Width="*" DataMemberBinding="{Binding Ordnungszahl}" IsFilterable="True" SortMemberPath="Ordnungszahl" IsSortable="True" />
            <telerik:GridViewDataColumn Header="BauartenCode" DataMemberBinding="{Binding BauartenCode}" Width="120" IsFilterable="False" IsSortable="True" />
            <telerik:GridViewDataColumn Header="AussenDMCode" DataMemberBinding="{Binding AussendurchmCode}" Width="120" IsFilterable="False" IsSortable="False" />
            <telerik:GridViewDataColumn Header="Stufe" DataMemberBinding="{Binding Stufe}" Width="120" IsFilterable="False" IsSortable="False"  />
            <telerik:GridViewDataColumn Header="Unterstufe" DataMemberBinding="{Binding Unterstufe}" Width="120" IsFilterable="False" IsSortable="False"/>
        </telerik:RadGridView.Columns>
    </telerik:RadGridView>

In code behind I do nothing more than:

private void RadGridView_RowValidating(object sender, Telerik.Windows.Controls.GridViewRowValidatingEventArgs e) {
        e.IsValid = false;
    }


When I hit ESC twice - editing is ended and the "old values" are displayed - but the row still displays "invalid" (red exclamation mark, red background).

What I expect is that the row becomes valid since it has the original (valid) values after "CancelEdit" (Hitting ESC twice).

The second problem (in debug) I get a "ArgumentNullException" (Parameter instance must not be null) when I add a row without entering anything hit ESC twice.

Manfred
GridView
Yordanka
Telerik team
 answered on 22 May 2013
13 answers
172 views
[Solved] GridView sorting on touch
Hi,
My gridview sort works great on mouse click but there is no response on touch input. Can you please tell me how to enable it for touch input?

Thanks.
GridView
Yordanka
Telerik team
 answered on 22 May 2013
3 answers
156 views
[Solved] Data export fails: Please provide writable stream for export!
Hello,

I'm trying to export my GridView to csv and I'm getting the following error: Please provide writable stream for export!

   bei Telerik.Windows.Controls.GridView.GridViewDataControl.Export(Stream stream, GridViewExportOptions options) in c:\TB\221\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Exporting\GridViewDataControl.Exporting.cs:Zeile 17.
   bei Data_Transfer_GUI.GridViewExportProvider.<>c__DisplayClass6.<Export>b__0()
   bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   bei MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)


This is my code:

var grid = pExportObject as RadGridView;
if (grid != null)
{
    string extension = "csv";
    var dialog = new SaveFileDialog();
    dialog.DefaultExt = extension;
    dialog.Filter = "CSV (*.csv)|*.csv";
    dialog.FilterIndex = 1;
 
    var format = ExportFormat.Html;
 
    if (dialog.ShowDialog() == true)
    {
        FileInfo fi = new FileInfo(dialog.FileName);
 
        switch (fi.Extension)
        {
            case ".xls":
                format = ExportFormat.Html;
                break;
            case ".xml":
                format = ExportFormat.ExcelML;
                break;
            case ".doc":
                format = ExportFormat.Html;
                break;
            case ".csv":
                format = ExportFormat.Csv;
                break;
        }
 
        using (var stream = dialog.OpenFile())
        {
            var exportOptions = new GridViewExportOptions();
            exportOptions.Format = format;
            exportOptions.ShowColumnFooters = true;
            exportOptions.ShowColumnHeaders = true;
            exportOptions.ShowGroupFooters = true;
 
            try
            {
                // Check if this thread has access to this object.
                grid.Dispatcher.VerifyAccess();
 
                // The thread has access to the object, so update the UI.
                grid.Export(stream, exportOptions);
            }
            // Cannot access objects on the thread.
            catch (InvalidOperationException ex)
            {
                // Placing job onto the Dispatcher of the UI Thread.
                grid.Dispatcher.BeginInvoke(DispatcherPriority.Normal,
                    new Action(() => grid.Export(stream, exportOptions)));
            }                       
 
        }
    }


The error occurs at this line:

grid.Dispatcher.BeginInvoke(DispatcherPriority.Normal,
    new Action(() => grid.Export(stream, exportOptions)));

When I hover the stream and open the tooltip I see that
stream.Length' threw an exception of type 'System.ObjectDisposedException'

Second thing is, that I can't understand why the InvalidOperationException is raised. The GridView is on the UI-Thread. It should be not necessary to invoke here. The export is called from a simple command which is called from the UI--Thread.

Do you have an idea why this all happens?

Thank you very much!
Kind regards







GridView
Dimitrina
Telerik team
 answered on 22 May 2013
1 answer
401 views
No Scroll bar
I have got an application with an outlook bar on one side and a panel on the other.  
I'm actually using a busy control.  When a user clicks on an option the specified control gets injected into the panel.  

This all works great and as it should.  My problem is that the scollbar never appears in the panel the control.  
I have a attached a pic and a link to a screen capture that may explain what i mean better.  



https://docs.google.com/file/d/0BwHgkQgjXmQvN0ZNVV9mTzNtdEU/edit?usp=sharing


<Border  BorderBrush="Silver">
       <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="150" />
                <ColumnDefinition Width="600" />
                 
            </Grid.ColumnDefinitions>
 
 
    <telerik:RadOutlookBar x:Name="outlookBar"
                           telerik:StyleManager.Theme="Office_Blue"
                        IsMinimized="{Binding ElementName=isMinimizedCheckBox, Path=IsChecked, Mode=TwoWay}"
                        IsMinimizable="{Binding ElementName=isMinimizableCheckBox, Path=IsChecked, Mode=TwoWay}"
                        IsVerticalResizerVisible="{Binding ElementName=isVerticalResizerVisibleCheckBox, Path=IsChecked, Mode=TwoWay}"
                         HorizontalAlignment="Stretch">
 
         <telerik:RadOutlookBarItem Header="Table Admin" FontWeight="Bold" x:Name="GroupTableAdmin"
                                     Icon="/Images/TableSmall.png" Tag="TableAdmin">
            <telerik:RadListBox Name="LstTableAdmin" SelectionMode="Single"
                                SelectionChanged="LstTableAdmin_SelectionChanged">
                <telerik:RadListBoxItem Content="Contracts" />
                <telerik:RadListBoxItem Content="Projects" />
                <telerik:RadListBoxItem Content="Task Types" />
                <telerik:RadListBoxItem Content="Task Groups" />
                <telerik:RadListBoxItem Content="Project/Contract" />
                <telerik:RadListBoxItem Content="TaskTypes/Groups" />
            </telerik:RadListBox>
        </telerik:RadOutlookBarItem>
 
        <telerik:RadOutlookBarItem Header="Work" FontWeight="Bold"  Icon="/Images/CalendarSmall.png">
                    <telerik:RadListBox Name="Lstworking" SelectionMode="Single"
                                        SelectionChanged="Lstworking_SelectionChanged">
                        <telerik:RadListBoxItem Content="Staff" />
                <telerik:RadListBoxItem Content="Full Time Days" />
                <telerik:RadListBoxItem Content="Part Time Days" />
            </telerik:RadListBox>
        </telerik:RadOutlookBarItem>
         
         
        <telerik:RadOutlookBarItem Header="Holidays" FontWeight="Bold"
                                   Icon="/Images/SunSmall.png">
            <telerik:RadListBox Name="LstHolidays" SelectionMode="Single">
                <telerik:RadListBoxItem Content="Public Holidays" />
            </telerik:RadListBox>
        </telerik:RadOutlookBarItem>
 
            <telerik:RadOutlookBarItem Header="My Staff" Icon="/Images/UsersSmall.png"
                                   x:Name="groupMyStaff" FontWeight="Bold" Tag="My Staff">
            <telerik:RadListBox Name="lstMyStaff" SelectionMode="Single"
                                        SelectionChanged="lstMyStaff_SelectionChanged"/>
        </telerik:RadOutlookBarItem>
         
    </telerik:RadOutlookBar>
     
      
      
 
      
 
    <telerik:RadBusyIndicator IsBusy="True" Grid.Column="1"
                            ScrollViewer.VerticalScrollBarVisibility="Visible"
                                Name="Progress" DisplayAfter="0"
                                telerik:StyleManager.Theme="Summer">
    </telerik:RadBusyIndicator>
 
 
 
    </Grid>
 
</Border>


Injected Control 
<UserControl
xmlns:TimeSheetsManagerControlLibrary="clr-namespace:TimeSheetsManagerControlLibrary"  
x:Class="ctrl_Contracts"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF4"
xmlns:telerikControls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"
    
<UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="../MyStyles.xaml" />
                <ResourceDictionary Source="../DataTemplates.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
</UserControl.Resources>
 
        <StackPanel VerticalAlignment="Top" Height="Auto">
 
        <telerik:RadButton Click="RadButton_Click" Width="200" HorizontalAlignment="Left" >
             <Image Source="/images/Print.png"/>
       </telerik:RadButton>
 
 
 
            <telerik:RadDataForm
Name="DataForm1"
     AutoGenerateFields="False" AutoEdit="True"
  AutoCommit="True"
    Style="{StaticResource MyDataFormStyle}"
ItemsSource="{Binding Contracts, Mode=TwoWay}"
CurrentItem="{Binding  SelectedItem,Mode=TwoWay}"
EditTemplate="{StaticResource ContractDataTemplate}"
NewItemTemplate="{StaticResource ContractDataTemplate}"
ReadOnlyTemplate="{StaticResource ContractDataTemplate}">
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="EditEnded">
                        <i:InvokeCommandAction Command="{Binding UpdateCommand}"/>
                    </i:EventTrigger>
                </i:Interaction.Triggers>
            </telerik:RadDataForm>
 
            <telerik:RadGridView x:Name="Grid" SelectionMode="Single"
                                 ScrollMode="RealTime" telerik:StyleManager.Theme="Summer"
                                 ScrollViewer.VerticalScrollBarVisibility="Visible"
                            ItemsSource="{Binding  Contracts, Mode=TwoWay}"
                            CurrentItem="{Binding  SelectedItem, Mode=TwoWay}"
                            SelectedItem="{Binding  SelectedItem, Mode=TwoWay}"
                            Style="{StaticResource MyGridViewStyle}"  >
                <telerik:RadGridView.Columns>
                    <telerik:GridViewDataColumn Header="ContractCode" Width="90"
                                DataMemberBinding="{Binding ContractCode}" />
                    <telerik:GridViewDataColumn Header="ContractDescription" Width="290"
                                DataMemberBinding="{Binding ContractDescription}" />
                    <telerik:GridViewCheckBoxColumn Header="Current" Width="20"
                                DataMemberBinding="{Binding Current}" />
                </telerik:RadGridView.Columns>
            </telerik:RadGridView>
 
 
 
        </StackPanel>
     
</UserControl>




#Region "Private Methods"
    Private Sub LoadControl(Control As Object)
        Me.Progress.IsBusy = True

        Control.Load()

        Me.Progress.Content = Control
        Me.Progress.IsBusy = False
    End Sub
#End Region


General Discussions
Pavel R. Pavlov
Telerik team
 answered on 22 May 2013
0 answers
318 views
Issue with enabling dropdown on Focus.
Hi,

I do have radautocompletebox with the dropdown button.

On clicking the button and on focus of the radautocomplete box, the dropdown is supposed to open.
The issue is when I select an item from the dropdown opened by button click and select an item from it, the selected item automatically sets to the text box inside the radautocompletebox thereby focusing on the same and the onFocus method gets called which is opening dropdown again which is not required.
This process happens so rapidly that two values (one from each dropdown) gets selected on a single click.
Kindly let me know in case if I am going wrong somewhere.

Below is the xaml code:
<ScrollViewer VerticalAlignment="Top" HorizontalScrollBarVisibility="Disabled" Grid.Column="0" VerticalScrollBarVisibility="Auto" Height="40" Width="186"  >
                        <telerik:RadAutoCompleteBox WatermarkContent="{Binding Path=WatermarkContent}"  HorizontalAlignment="Left" Name="radDeseaseCategoryAutoCompleteBox" Width="186"
                                    SelectionMode="Multiple"
                                    FilteringBehavior="{StaticResource EmptyTextFilteringBehavior}"
            TextSearchMode="Contains"
            TextSearchPath="Name" MinHeight="35"
                                     AutoCompleteMode="Suggest"
                                     ItemsSource="{Binding Path=DiseaseCategoryCollection, Source={StaticResource reportDropdownInfo}}"
                                     SelectedItems="{Binding Path=SelectedDiseaseCategoryCollection, Mode=TwoWay, ValidatesOnDataErrors=True, NotifyOnValidationError=True}"
                                     GotFocus="DeseaseCompleteBoxGotFocus" LostFocus="DeseaseCompleteBoxLostFocus"
                                    >
                            <telerik:RadAutoCompleteBox.DropDownItemTemplate>
                                <DataTemplate>
                                    <TextBlock Text="{Binding Name}" Width="190"/>
                                </DataTemplate>
                            </telerik:RadAutoCompleteBox.DropDownItemTemplate>
                            <telerik:RadAutoCompleteBox.BoxesItemTemplate>
                                <DataTemplate>
                                    <TextBox Text="{Binding Name}" IsEnabled="False" TextWrapping="Wrap" Width="140" MaxWidth="140"  Background="White" />
                                </DataTemplate>
                            </telerik:RadAutoCompleteBox.BoxesItemTemplate>
                        </telerik:RadAutoCompleteBox>
                    </ScrollViewer>
                    <telerik:RadButton Grid.Column="1" IsTabStop="False"
                               Click="DeseaseRadButtonClick"
                               VerticalAlignment="Top" HorizontalAlignment="Right"
                               Width="15"
                               Height="40" Grid.Row="1">
                        <Path Data="M0,0 L4,0 L4,4 z" Fill="Black" HorizontalAlignment="Right" Height="5" Stretch="Fill" VerticalAlignment="Center" Width="5" UseLayoutRounding="False" RenderTransformOrigin="0.5,0.5">
                            <Path.RenderTransform>
                                <RotateTransform Angle="135" />
                            </Path.RenderTransform>
                        </Path>
                    </telerik:RadButton>

Here is the method in code behind. .

 private void MechOfActRadButtonClick(object sender, RoutedEventArgs e)
        {
            radMecofActionAutoCompleteBox.Focus();
        }

        private void RadMecofActionAutoCompleteBoxGotFocus(object sender, RoutedEventArgs e)
        {
            radMecofActionAutoCompleteBox.WatermarkContent = "";
            radMecofActionAutoCompleteBox.Populate(radMecofActionAutoCompleteBox.SearchText);
        }
AutoCompleteBox
Avani
Top achievements
Rank 1
 asked on 22 May 2013
1 answer
194 views
ApplicationButton Content (text) Color
I'm using Expression Blend and I'm editing my ApplicationButtonStyle.  I cannot figure out how to change the color of the text inside the Grid that contains the ContentPresenter, TextBlock, and Image.  Changing the Background/Foreground colors in TextBlock or ContentPresenter doesn't work.  What I'm trying to do is have my ApplicationButton tab look the same as a RadRibbonTab, but I can't figure out the Context (or text) color part.
RibbonView and RibbonWindow
Tina Stancheva
Telerik team
 answered on 22 May 2013
1 answer
193 views
Change RadDiagramConnection.TargetConnectorPosition in OrgChartDiagram
Hi!

I use polyline in OrgChartDiagram with OrgTreeRouter. And I can't change TargetConnectorPosition property of polyline connection (only with Straight, Bezier). After change TargetConnectorPosition to "Right" it returned to initial state ("Left"). I need connection like red on image. How can I do it?

Diagram
Petar Mladenov
Telerik team
 answered on 22 May 2013
3 answers
150 views
ArgumentNullException in bar charts
Occasionally we are seeing the following exception from our dashboards that show bar charts. Unfortunately I haven't been able to reproduce this in the lab: is this something that can be fixed?

System.ArgumentNullException

Value cannot be null.
Parameter name: owner

Stack Trace:
   at System.Windows.Automation.Peers.UIElementAutomationPeer..ctor(UIElement owner)
   at Telerik.Windows.Automation.Peers.BarSeriesAutomationPeer.GetChildrenCore()
   at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
   at System.Windows.Automation.Peers.AutomationPeer.UpdateChildren()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
   at System.Windows.Automation.Peers.AutomationPeer.UpdatePeer(Object arg)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
ChartView
Petar Marchev
Telerik team
 answered on 22 May 2013
2 answers
474 views
Get row content by using RelativeSource
Hello All,

I have RadGridView  which hava a button embeded.  The button is binded with a command and the command parameter is the content of each row.  The bind expression of CommandParameter is "{Binding Path=Content, RelativeSource={RelativeSource TemplatedParent}}".   The problem is the command cannot get its parameter.  I am sure the command binding is works, because it is working well if I using a DataGrid insteast.   Does anyone could help me.

Thank you && Best Regards
Wei
 

 

<telerik:RadGridView x:Name="TradesGridView" 
 
ItemsSource="{Binding Trades, Mode=TwoWay}"
 CanUserFreezeColumns="False">
<telerik:RadGridView.Columns >
<telerik:GridViewColumn Header="Amend" >
<telerik:GridViewColumn.CellTemplate>
<DataTemplate>
<controls:RadButton Grid.Column="4" IsBackgroundVisible="False" Margin="10 2" MinWidth="30" ToolTipService.ToolTip="Amend Trade"
  
 Command="{Binding Path=DataContext.AmendCommand, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DockPanel}}}"
  
CommandParameter="{Binding Path=Content, RelativeSource={RelativeSource TemplatedParent}}">
 
<Path Data="M3.6943,11.9199L4.1323,9.5549C4.1443,9.4019,4.1953,9.2459,4.2973,9.1289L9.4233,4.0049L11.8853,6.4669L6.7593,11.5919C6.7043,11.6469,6.4893,11.7749,6.4183,11.7869L4.0083,12.2339C3.7943,12.2749,3.6533,12.1349,3.6943,11.9199 M4.8903,11.4789L6.2383,11.2519L10.9273,6.5619L10.3673,6.0059L5.7093,10.6679L4.8153,9.7169L4.5693,11.1329C4.7253,11.1989,4.8253,11.3219,4.8903,11.4789 M12.4513,5.9019L9.9893,3.4399L10.7863,2.6439C11.0063,2.4229,11.3643,2.4229,11.5853,2.6439L13.2483,4.3069C13.4683,4.5269,13.4683,4.8849,13.2483,5.1059z"
Fill="#FF333333" Stretch="Fill" Width="12" Height="12" />
</controls:RadButton>
</DataTemplate>
</telerik:GridViewColumn.CellTemplate>
</telerik:GridViewColumn>


GridView
Qin
Top achievements
Rank 1
 answered on 22 May 2013
3 answers
342 views
[Solved] Load image make change and save back to database
Hi

I'm not sure if WPF is the right technology or which Telerik control is best suited for the following scenario, so I would appreciate any recommendations that anyone can give me.

Secnario:

The user will load images from a database that were captured on camera.
The user will need to view at least 4 images at a time and maybe click one to view in full screen.(carousel control?).
The user should be able to draw circle on the image to highlight certain parts of the image.  This image must then be saved back to the database as a copy of the original with the users changes/highlights.

Can this be done in WPF with Telerik controls or can it be done easier with a different technology.

Thanks
Paul
ImageEditor
Paul
Top achievements
Rank 1
 answered on 21 May 2013
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Top users last month
Miljana
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