Questions on UI for WPF Forum

3 answers

95 views

It seems like there are a 2 problems if you try to validate your data by using IDataErrorInfo.

- The UI doesn't get updated properly. I set the background to red for a test and added a breakpoint at the validation part of the code. The code gets validated properly but the background stays red once the error is resolved.
- If you enter a wrong value the text gets moved to the top left corner of the cell and you aren't able to edit the cell until you press escape.

GridView

answered on 01 Apr 2010

1 answer

53 views

Setting TickLineStyle makes ticks disappear completely

Hi Telerik,

When I set tick line styles as follows:

    
            <Style x:Key="AxisTickStyle" TargetType="Line">  
        
                    <Setter Property="Stroke">  
        
                        <Setter.Value> 
        
                            <SolidColorBrush Color="{DynamicResource ColorDarkGray}" />               
        
                        </Setter.Value>           
        
                    </Setter> 
        
                </Style>

    
            chart.DefaultView.ChartArea.AxisX.AxisStyles.TickLineStyle = Application.Current.Resources["AxisTickStyle"] as Style;  
        
            chart.DefaultView.ChartArea.AxisX.AxisStyles.MinorTickLineStyle = Application.Current.Resources["AxisTickStyle"] as Style;

They dissappear completely, looks like the actually width of them decreases to 0 because the ItemLabels come to the edge of the axis

Any help would be appreciated

Rav

Chart

answered on 01 Apr 2010

6 answers

2.4K+ views

WPFWindow ShowDialog not working the second time?

Hi,

We've got the following code in the application's App class's constructor (the fact that we're doing this in the App class appears to be related to the issue):

                                bool allGood = false;         
                        do         
                        {         
                            LoginWindow loginWindow = new LoginWindow();         
                            loginWindow.ShowDialog();         
                                     
                            if (loginWindow.DialogResult.GetValueOrDefault(false))         
                            {         
                                try         
                                {         
                                    // Try and do something...         
                                    allGood = true;         
                                }         
                                catch (Exception)         
                                {         
                                    lastLoginFailed = true;         
                                }         
                            }         
                            else         
                                return;         
                        } while (!allGood);         

In the LoginWindow, there's a button whose Click handler ends with a call to Close(). The "Try and do something" code tries something that may possibly throw an Exception. If it does, then allGood stays false and the loop happens again. If it doesn't throw an exception, allGood is set to true and the job ends.

The problem is this - the first call to ShowDialog works fine. The second call does nothing.

Any idea what we're doing wrong here?

Thanks,

yonadav

Window

answered on 31 Mar 2010

1 answer

168 views

how to get the parent name when selecting the child

hi

am using rad tree view, i want to get the parent value, when am selecting a child
i mean, when i click on sub items in the tree i can get the values by selected items, but i want to get the child value and corresponding parent value when am cliking the child. how i can do it

TreeView

answered on 31 Mar 2010

4 answers

133 views

Rebind does not call RowLoaded.. how to refresh conditionally formatted data

Hello,
I call Rebind to refresh my data. But I'm using the RowLoaded event to format my data conditionally.
It appears that the Rebind does not call this event.
How can I refresh my data and format it conditionally.
Thank You

GridView

answered on 31 Mar 2010

1 answer

151 views

Set the size of Bar series gap

My chart has 3 Bar series, the 3 bars are shown next to each other and there's a gap between it and the next group of 3 bars. Is there a way to set the size of this gap? In my case I need it to be 0 (no gap).

Chart

answered on 31 Mar 2010

2 answers

101 views

How many views are instantiated per TabControl?

Hi,

I have a TabControl where a list of my view model objects are bound.

The ContentTemplate uses a UserControl:

<Setter.Value>

<Views1:ControlUnitView Margin="10" />

</Grid>

</DataTemplate>

</Setter.Value>

</Setter>

I had expected that each tab item gets its own copy of the user control. This seems not to be the case. Instead only one user control is created but the data context is switched between each tab selection. Is this the expected behavior?

Within my user control, I have a grid. I want to copy the selected items from my view model to the SelectedItems property of the grid after the tab changed. I tried to use the datacontext-Changed event. However, when i set the SelectedItems list during this event, the items are not highlighted. But that's the only event I get within my user control. Is there a better way to accomplish this?

Thanks

Kind regards

Hartmut

TabControl

answered on 31 Mar 2010

1 answer

194 views

Binding Min and Max value of a gauge

I am able to bind an 'IndicatorList Value' in XAML to a source. But if I try to bind 'Min' and 'Max' of a 'Linear/RadialScale', it throws an error. How can I do that, as in my project these three values come from a class.

Gauges

answered on 31 Mar 2010

2 answers

84 views

Problem with grouping

Hi team !!

I use the following code to expand a group in my grid:

goalsDataGrid.ExpandGroup(goalsDataGrid.Items.OfType<IGroup>().ElementAt(1));

The groups are of type "Essential" and "Desired". But suppose i haven't added any record of type "Desired", ElementAt(1) refers to a record of type "Desired".

Now, when i have not yet added an item of type "Desired", obviously the above-mentioned single line of code will throw an ArgumentOutOfRangeException. How do i manipulate the code to expand a group only if it is present?

Regards,

Jimit.

GridView

answered on 30 Mar 2010

9 answers

113 views

Mr.

In the TreeView Data Binding sample, I set IsDragDropEnabled="True". Then tried to drap and drop a Team from one Division to another Division, but it didn't work.

By the way, how could I change the post title. I want to change the post title to be "Problem of Drag and Drop in TreeView Data Binding".

TreeView

answered on 30 Mar 2010