Been trying for a while to see what slows down the loading of some forms in my application.

Eventually I just decided to make a bunch of radgrids show up in a simple application when i hit a button. I did that because in my initial form I have about 6 radgrids (they have very few rows each) and it bugs me to see how slow it's loading on an old computer.

just so you understand what i did i made a user control with 6 of these inside and when i hit the button it added the control inside the grid of the mainwindow.

   <telerik1:RadGridView ShowGroupPanel="False"  telerik1:TouchManager.IsTouchHitTestVisible="False"  Grid.Column="2" Grid.Row="3" Name="radGridView1" IsEnabled="True" CanUserReorderColumns="False" IsReadOnly="True"<br>                                  RowIndicatorVisibility="Collapsed" DataLoadMode="Asynchronous" <br>                                  AutoGenerateColumns="False" IsFilteringAllowed="False"<br>                                  ItemsSource="{Binding Someth.Oth}"<br>                                  SelectedItem="{Binding OthSel}"<br>                                  CanUserInsertRows="False" CanUserDeleteRows="False" Grid.ColumnSpan="3" Margin="1,1,1,0"><br>            <telerik1:RadGridView.Columns><br>                <telerik1:GridViewDataColumn Header="Nume" DataMemberBinding="{Binding Person.Name}"  <br>                                                         Width="4*" TextWrapping="Wrap" IsReadOnly="True"/><br>                <telerik1:GridViewDataColumn Header="Prenume" DataMemberBinding="{Binding <span style="font-size: 14.44444465637207px;">Person</span><br>.SurName}"  <br>                                                         Width="4*" TextWrapping="Wrap" IsReadOnly="True"/><br>                <telerik1:GridViewDataColumn Header="Legitimatie" DataMemberBinding="{Binding <span style="font-size: 14.44444465637207px;">Person</span><br>.Badge}"  <br>                                                         Width="4*" TextWrapping="Wrap" IsReadOnly="True"/><br>            </telerik1:RadGridView.Columns><br>        </telerik1:RadGridView><br>

anyway, after profiling with redgate i came to see that there was a big chunk used by telerik.windows.input.touch.touchmanager.registertouchableelement. Something about TouchIndicator.

As you can see I already have telerik1:TouchManager.IsTouchHitTestVisible="False" . Did not do a thing.


Basically i do not need touch in my application . At all. If the computer is powerful enough and they want to, sure, I'll enable it for them. But not if it takes so much performance from my app.

Second thing that was showing up in the profile was the GridView.GridViewScrollViewer, the measureoveride. I don't use scroll either but I don't think it's related only to that (right?). As I looked in, most of it was spent on GridViewHeaderRow measureoverride. This is something I could also see with WPFPerf on my application and also in the test. Why is the header so consuming? In my application I don't even show it for some and it still eats up a lot.

Thank you for any input.

Is there a good way to determine if a RadDocument has been changed? I know you do not have a sophisticated compare capability. If you what is your recommendation on determining if the document has been changed.

Hi,

I have a button inside the RadExpander and have the command property as well. However I am getting the error in the output saying the command property is not found in my view model. I have set the relative source to the rad expander as well.

The thing is I have the button inside the Rad Expander header and have the command property and it is working perfectly.

I am using Prism Framework with MEF.

Please see below the code,

<telerik:RadExpander Grid.Row="0" Margin="5" >

<telerik:RadExpander.Header>

<Grid>

<telerik:RadButton Margin="0,0,10,0" Style="{DynamicResource RadImageButton}"

Command="{Binding Path=DataContext.CollapseCommand, RelativeSource={RelativeSource FindAncestor, AncestorType=telerikinput:RadExpander}}"

Visibility="{Binding Converter={StaticResource VisibilityConverter}, Path=IsHeaderExpand}"> 

</telerik:RadButton>

<telerik:RadButton Margin="0,0,10,0" Style="{DynamicResource RadImageButton}"

Command="{Binding Path=DataContext.ExpandCommand,RelativeSource={RelativeSource FindAncestor, AncestorType=telerikinput:RadExpander}}"

Visibility="{Binding Converter={StaticResource VisibilityConverter}, Path=IsCollapse}">

</telerik:RadButton>

<Label Content="Search Criteria" Margin="40,10,0,0" Style="{DynamicResource LabelBoldContentStyle}" HorizontalAlignment="Left"/>

</Grid>

</telerik:RadExpander.Header>

<Grid Margin="5">

<Button Grid.Row="7" Grid.Column="7" Height="28" Width="50" Margin="0,0,46,0"

Content="Search" HorizontalAlignment="Right" FontWeight="Bold"

Command="{Binding Path=DataContext.SearchComamnd, RelativeSource={RelativeSource FindAncestor, AncestorType=telerik:RadExpander}}"/>

</Grid>

Please let me know what I am missing in my code ?

Thnx,
Sivakumar

Hi,

I am having a problem with the GridView: if the row is marked invalid because a property is invalid, the user is unable to edit any other cell.

Let's say I have a GridView that is letting me edit a class called Person that has 3 properties

• Name: the person's name
• Type: which allows the user to choose between Child or Adult
• Age: that is validated according to the Person type (child is allowed to be between 1 - 19, adult is allowed to be between 19-120)

Now, let's say the user adds a new Person and enters a name, selects child as the person type by accident and enters an age of 30. Because the Person is actually not a child, the age property becomes invalid and the row is set to invalid.

At this point the user is not able to change the Type to Adult because they cannot leave the age field.

This is particularly a problem if the user attempts to save a person without entering an age or type because the row becomes invalid, the type is not selected and the field that the user is stuck in is the Age field. They cannot edit the type column and so the age is always going to be invalid.

How do I get around this?

Thank you,

-Rebecca

Please forgive my lack of understanding on how the Persistence Framework functions.

I have an application where I allow users to set what columns on a Grid View are visible or hidden.  When they close the application, I want to save their preferences.  When they open the application, I want to reload their preferences from the last time they used the program. 

This seems like a good job for Persistence Framework.  I began by looking at this WPF online help example:http://www.telerik.com/help/wpf/persistence-framework-getting-started.html

The code that saves my Grid View layout as a stream seems to be working, however, I'm having trouble reloading the layout once the application has been closed and re-opened.  When I re-open the application my Stream object is nothing, so the PersistenceManager.Load method throws an error.  I don't understand how to retrieve my saved Grid View Layout.

Can you describe how Persistence Framework functions, and help me understand how I retrieve and apply my saved Grid View layout?

Any assistance is greatly appreciated.  Thank you.

Hello,
I have GridView with some columns with If I reduce width of GridView, unnecessary horizontal scrollbar appears. But when I click it, scrollbar disappears. There are no problems when all columns have How can I fix it ?

Hey guys,

I have RadRibbonDropDownButtons with drop down content inside a RadRibbonView.QuickAccessToolBar.  I also have functionality to dynamically change telerik themes.

When the application opens, I am able to click the RadRibbonDropDownButtons and see the drop down content perfectly fine, but when I change themes the drop down content does not open. All other telerik components work fine.

Below is the code to dynamically change themes. Any ideas on what would cause the button's not to display their drop down content?

Specifications:

Telerik libraries - RadControls for WPF Q2 3013 SP1
My Project: WPF desktop application in.Net 4.0 C#.

The problem:

I'm adding rows to the RagGridView through an ItemsSource binding to an observable collection.  Whenever an item is added to the collection, the RagGridView control reloads all previously added rows along with the new row.  It also re-instantiates user controls from the exsting rows.  For example, If I have 20 rows, and one gets added from the collection, the entire 20 rows are reloaded before the new one gets loaded. This makes the GUI get slower and slower as rows are added.

What's worse: When items are added that will be displayed out of the scrolling view, the RagGridView reloads all the old rows and then it eventually (after about 15 items are added that are not visible) goes into an infinite loop reloading all the rows that are not visible.  This locks up the GUI and fills up system memory since it re-instantiates user controls.  This infinite loop happens in my situation after about 45 to 50 rows total are in the grid control.

Here's the XAML definition of the control:


Here is the stack trace from my RowLoaded callback method while the RadGridControl is caught in the infinite loop:



And here's the stack trace when the control is instantiating my CircularProgressBar user control in the infinite loop:



I have tried turning data virturalization on and off with no change the results.  I have used the RadGridConrol with much success in the past, but I'm stumped here.  I hope I'm just missing something stupid.

Any suggestions?  Thanks.

I have a hyperlink in a cell of a GridView, I'm trying to use Automated UI Test to record the action of clicking on the hyperlink, the automation works well with the DataGrid that comes with Visual Studio but when I tried using Telerik's GridView, it fails. The error message I get, is along the lines, that it cannot detect the hyperlink. Could anyone please guide me on how to resolve this problem?