I have added several columns into gridview in the code, the binding is something like a[" + Index + "].b while Index  is a number like 0,1,2. So how to solve the problem since the added column cannot be drag or sort. I have already tried set DataType, seems like not ok.

Hey all,

So to start, let me say that I have a project built out to learn with...I'm trying things out just to figure out better patterns and whatnot when building up apps since I've been doing a lot of that lately and I've started a blog to document my experiences.

What I was doing initially was creating a project to figure out which was better to use...a BackgroundWorker or Task for doing background processing of getting a data source for the grid.  What I ended up with was a test app that is buried under a mountain of bad perf and it locks the UI up until it's darn good and ready to let it go.  As far as I can tell in my source code...I'm not attaching any of the BackgroundWorker or Task threads to the UI thread...so I'm pretty confused as to what's going on.

If I just do one at a time, the table starts filling up with data before the RadBusyIndicator can even bring up it's UI...if I try 2 or 3...I start seeing the RadBusyIndicator doing it's thing...but the UI is still responsive.  If I do all 12...the UI is stuck for a good 10 minutes (my test database has more than 250,000 records in each table).

My source files can be found at the following blog post (If you'd rather I posted them here I can do that as well...)

Any thoughts as to what I'm doing wrong?  Thanks in advance.  :)

I have the same issue with the DataFormComboBoxField in a RadDataForm : (more detailed : http://www.telerik.com/forums/edit-lookup-values-with-dataformcomboboxfield )

Either i get the problem i first came for, either i have this one (with a GridViewComboBoxColumn or a DataFormComboBoxField):
                <telerik:GridViewComboBoxColumn Header="Retour 2"
                                                   DisplayMemberPath="Name"
                                                   DataMemberBinding="{Binding Team, Mode=TwoWay}"
                                                   ItemsSource="{Binding Paths, Source={StaticResource EscortViewModel}}"
                                                   />
With that, when i load the usercontrol, the value is not set/displayed in the column... BUT, when i change it, it calls the set of the viewmodel and update the ViewModel (so the displayed values).
What i can't find is how mix the two to display the data when the usercontrol is loaded AND update the value !
Thank you very much

I have the same issue with the DataFormComboBoxField in a RadDataForm : (more detailed : http://www.telerik.com/forums/edit-lookup-values-with-dataformcomboboxfield )

Either i get the problem i first came for, either i have this one (with a GridViewComboBoxColumn or a DataFormComboBoxField):
                <telerik:GridViewComboBoxColumn Header="Retour 2"
                                                   DisplayMemberPath="Name"
                                                   DataMemberBinding="{Binding Team, Mode=TwoWay}"
                                                   ItemsSource="{Binding Paths, Source={StaticResource EscortViewModel}}"
                                                   />
With that, when i load the usercontrol, the value is not set/displayed in the column... BUT, when i change it, it calls the set of the viewmodel and update the ViewModel (so the displayed values).
What i can't find is how mix the two to display the data when the usercontrol is loaded AND update the value !
Thank you very much

Hello！

I have a problem when using Windows8TouchTheme,

when alert in Windows8TouchTheme, the punctuations can not show incorrect.

but in windows7theme,it is all right.

 

Hello,
Reading http://docs.telerik.com/devtools/wpf/controls/raddataform/how-to/raddatafor-edit-lookup-values-with-radcombobox.html
I have a viewmodel with (simplified):
Agent
    - long Id
    - string FirstName
    - Team Team
Team
   - long Id
   - string Name

In an UserControl (simplified):
<UserControl.Resources>
        <viewmodels:EscortViewModel x:Key="EscortViewModel" />
</UserControl.Resources>
<Grid x:Name="LayoutRoot" DataContext="{StaticResource EscortViewModel}">
<Grid.Resources>
            <DataTemplate x:Key="AgentEditTemplate">
                    <telerik:DataFormDataField Label="Last Name" DataMemberBinding="{Binding LastName, Mode=TwoWay}" Grid.Row="0" Grid.Column="1"/>
                    <telerik:DataFormComboBoxField Label="Team"
                                                   SelectedValuePath="Id"
                                                   DisplayMemberPath="Name"
                                                   Grid.Row="2" Grid.Column="1"
                                                   DataMemberBinding="{Binding Team.Id, Mode=TwoWay}"
                                                   ItemsSource="{Binding Teams, Source={StaticResource EscortViewModel}}"
                                                   />
                </Grid>
            </DataTemplate>
</Grid.Resources>
        <StackPanel>
            <telerik:RadGridView x:Name="agentViewer"
                                    ItemsSource="{Binding Agents}"
                                    AutoGenerateColumns="False"
                                    RowIndicatorVisibility="Collapsed"
                                    IsReadOnly="True"
                                    >
                <telerik:RadGridView.Columns>
                    <telerik:GridViewToggleRowDetailsColumn />
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding FirstName, Mode=OneWay}" Header="Name" />
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding Team.Name, Mode=OneWay}" Header="Team" />
                </telerik:RadGridView.Columns>
                <telerik:RadGridView.RowDetailsTemplate>
                    <DataTemplate>
                        <Grid Background="DarkGray">
                        <Grid Margin="15">
                            <telerik:RadDataForm x:Name="agentDataEdit"
                                                    CurrentItem="{Binding}"
                                                    Header="Edit agent:"
                                                    AutoGenerateFields="False"
                                                    EditTemplate="{StaticResource AgentEditTemplate}"
                                                    ReadOnlyTemplate="{StaticResource AgentEditTemplate}"
                                                    NewItemTemplate="{StaticResource AgentEditTemplate}"
                                                    >
                                </telerik:RadDataForm>
                        </Grid>
                        </Grid>
                    </DataTemplate>
                </telerik:RadGridView.RowDetailsTemplate>
            </telerik:RadGridView>
                <Grid Background="DarkGray" x:Name="panelAddNew">
                    <Grid Margin="15">
                        <telerik:RadDataForm x:Name="agentDataNew"
                                                    Header="Add agent:"
                                                    AutoGenerateFields="False"
                                                    EditTemplate="{StaticResource AgentEditTemplate}"
                                                    ReadOnlyTemplate="{StaticResource AgentEditTemplate}"
                                                    NewItemTemplate="{StaticResource AgentEditTemplate}"
                                                    ItemsSource="{Binding Agents}"
                                                    >
                        </telerik:RadDataForm>
                    </Grid>
                </Grid>
        </StackPanel>
</Grid>

Almost everything works great. In the complete form, i can edit string, long and enum (with DataFormComboBoxField). What i can't do is the binding with the Agent.Team.Id.
In fact, the value from DB is displayed (team "A" or "B"...) but when i edit the form and change the Team (list displayed in the DataFormComboBoxField), it never return in the set of the Agent.Team property.
Am I missing something or did i do something wrong ? Is there a bug or an other syntax for the DataMemberBinding="{Binding Team.Id, Mode=TwoWay}" ?
I would like to not use an Agent.TeamId property but the object please.
Thank you very much.

I would like to set the selected PageSize when showing RadDiagramPrintPreview. How can I I achieve that as the PageInfo.PageSize property of RadDiagramPrintPreview is read only?

 

My diagram page size is set to Tabloid but when I lunch RadDiagramPrintPreview for my diagram the selected PageSize is set to letter.

I have a grid that has a cell validating event, which sets the isValid property of the edit to false when required. As expected, I am unable to move away from the cell until I correct the error. However, I notice that the grid is still updating the underlying VM with the incorrect value. Surely this is wrong.

This is causing me an issue, because the user can still initiate a save (due to a complicated winform/wpf integration), and as such persist the incorrect value.

Hi,

The question is similar to pie chart. Basically, I have a bar chart, and the feature I wanted is that:

When mouse hover on bar, the according category axis label can be highlighted (customized color) too. Same goes that when mouse is over category axis label, the according bar area will be highlighted.

 

Same as selection behavior, I can click on category axis label to make a selection, drag-area to do multiple selection from category axis label, same as I do this from data plot area.

 

Thanks,

Mingxue

Hi,

I'm using RadDiagramView on big diagram and I need to export png images.

png encoding and 91 dpi is ok for my needs, so I'm calling ExportToImage method leaving default parameters as follows:

On big diagrams, i'm in trouble because the quality of exported images is very low (seems blurred); I cannot understand why.

I have cloned your github xaml sdk examples and pushed it on my personal account on this url https://gitlab.com/webartoli/repro-lowquality-exporttoimage-radtreeview. You can find a repro starting Diagram/Autoscrolling project.

Repro changes:

• Positions button will move shapes on graph
• Export image will export png file of current diagram in current directory with random filename.

attached a picture with a comparison of the same shape on a small diagram (300 x 150px) and on a big diagram (6100 x 6100 px).

 

Am I doing something wrong ?

How can I manage properly all the options, in order to obtain the same quality regardless of the size of the diagram ?

 

Thanks

Claudio