Questions on UI for WPF Forum

7 answers

160 views

Hi there,

I am getting a serious NullReferenceException (haven't managed to catch it by exceptions and it crashes my client), and it goes something like this:

   at Telerik.Windows.Controls.Map.BingMapProvider.InitializeProvider() in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Map\Providers\BingMapProvider.cs:line 542
   at Telerik.Windows.Controls.Map.BingMapProvider.ImageryService_GetImageryMetadataCompleted(Object sender, GetImageryMetadataCompletedEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Map\Providers\BingMapProvider.cs:line 499
   at Telerik.Windows.Controls.Map.VEWPFImageryService.ImageryServiceClient.OnGetImageryMetadataCompleted(Object state) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Service References\VEWPFImageryService\Reference.cs:line 2106
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

It seems to be happening at random, so I can't pin it down. Is there any way I can solve this please?

Thanks,
Simon.

Map

answered on 06 May 2010

1 answer

150 views

How to consume data from a ms access database using a chart

Hi I am having problems trying to bind the radChart to a ms access database. Does anyone have a solution?. Or just a short tutorial. I see none in this forum at all.

Chart

answered on 06 May 2010

1 answer

117 views

[Solved] Error during creation of WPF Project

Hi,

I try to create a Radcontrol WPF Project, but an error occur during creation.
You can see the detail of the error in the attached file.

Conf:
VS 2010 RTM
RadControl for WPF 2010.1.422

Kind regards.

General Discussions

answered on 06 May 2010

1 answer

96 views

sample for line graph with 80K data points

Hi,

I am trying to draw a line graph with two data series with each data series with about 80000 data points - that performs well? I find that after about 1000 data points it is a hog.

Is there anyway to create a line graph with 80K datapoints that is fairly quick? I don't need any frills on the chart - simple vanilla chart would be great.

thanks in advance,

Jas

Chart

answered on 06 May 2010

1 answer

120 views

Grouping and "not-allowed-sign"

1. I have a column in my Grid. It is not allowed to use grouping for this column (IsGroupable="False" ). When I try to drag-drop the column-title to the GroupPanel it just does not do anything. And that is what is expected, but the"not-allowed-image" did not show up.
2. Another column in the Grid is allowed to use grouping. When I drag-drop the title to the GroupPanel everything works fine.
But... when I try to drag-drop the title back again, this also works, but now the "not-allowed-sign" shows up.

Should this not be the other way around: the "not-allowed-sign" shows when I try to group a column with IsGroupable="False"...?

GridView

answered on 06 May 2010

1 answer

193 views

Validating / Styling

Hi

I have a small problem. When I validate a TextBoxes Value and than giving the User a visual feedback everything works prefectly fine.

When I do this with a RadComboBox, the only thing that works is the validation part. But I don't get any visual feedback. Here is the XAML part in my App.xaml

    
            <Application x:Class="CDM.App" 
        
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                         xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                         xmlns:telerikInput="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input" 
        
                         > 
        
                <Application.Resources> 
        
                <Storyboard x:Key="FlashError"> 
        
                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00"  
        
                                                   Storyboard.TargetProperty="(UIElement.Visibility)"> 
        
                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/> 
        
                            <DiscreteObjectKeyFrame KeyTime="00:00:05" Value="{x:Static Visibility.Hidden}"/> 
        
                        </ObjectAnimationUsingKeyFrames> 
        
                    </Storyboard> 
        
                <Style x:Key="myErrorTemplate" TargetType="Control"> 
        
                    <Setter Property="Validation.ErrorTemplate"> 
        
                        <Setter.Value> 
        
                            <ControlTemplate> 
        
                                <StackPanel Orientation="Vertical"> 
        
                                    <Border BorderBrush="Red" BorderThickness="1"> 
        
                                        <AdornedElementPlaceholder Name="mycontrol"> 
        
                                            <Label Foreground="White" Background="Red"  
        
                                                       Content="{Binding ElementName=mycontrol,  
        
                                                                 Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"> 
        
                                                    <Label.Triggers> 
        
                                                        <EventTrigger RoutedEvent="FrameworkElement.Loaded"> 
        
                                                            <BeginStoryboard Storyboard="{StaticResource FlashError}" /> 
        
                                                        </EventTrigger> 
        
                                                    </Label.Triggers> 
        
                                                </Label> 
        
                                        </AdornedElementPlaceholder> 
        
                                    </Border> 
        
                                    <!--<Label Foreground="White" Background="Red"  
        
                                                       Content="{Binding ElementName=mycontrol,  
        
                                                                 Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"> 
        
                                    </Label>--> 
        
                                </StackPanel> 
        
                            </ControlTemplate> 
        
                        </Setter.Value> 
        
                    </Setter> 
        
                    <Style.Triggers> 
        
                        <Trigger Property="Validation.HasError" Value="true"> 
        
                            <Setter Property="ToolTip"  
        
                                        Value="{Binding  
        
                                                RelativeSource={x:Static RelativeSource.Self}, 
        
                                                Path=(Validation.Errors)[0].ErrorContent}" /> 
        
                        </Trigger> 
        
                    </Style.Triggers> 
        
                </Style> 
        
                  <Style TargetType="TextBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                <Style TargetType="CheckBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                    <Style TargetType="telerik:RadComboBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                </Application.Resources> 
        
            </Application>

And here the the C# Part for Validation. Allthough I am convincied that the validation works. Tested it several times.

    
                public Platten() 
        
                    { 
        
                        this.preisReference.AssociationChanged += new CollectionChangeEventHandler(preisReference_AssociationChanged); 
        
                        this.AddError("preis", "Preiscode fehlt!"); 
        
                    } 
        
                    void preisReference_AssociationChanged(object sender, CollectionChangeEventArgs e) 
        
                    { 
        
                        if (e.Action == CollectionChangeAction.Remove) 
        
                        { 
        
                            OnPropertyChanging("preis"); 
        
                        } 
        
                        else 
        
                        { 
        
                            if (e.Action == CollectionChangeAction.Add) 
        
                            { 
        
                                this.RemoveError("preis"); 
        
                            } 
        
                            OnPropertyChanged("preis"); 
        
                        } 
        
                    } 
        
                    #region IDataErrorInfo Members 
        
                    private Dictionary<string, string> m_validationErrors = new Dictionary<string, string>(); 
        
                    private void AddError(string columnName, string msg) 
        
                    { 
        
                        if (!m_validationErrors.ContainsKey(columnName)) 
        
                        { 
        
                            m_validationErrors.Add(columnName, msg); 
        
                        } 
        
                    } 
        
                    private void RemoveError(string columnName) 
        
                    { 
        
                        if (m_validationErrors.ContainsKey(columnName)) 
        
                        { 
        
                            m_validationErrors.Remove(columnName); 
        
                        } 
        
                    } 
        
                    public bool HasErrors 
        
                    { 
        
                        get { return m_validationErrors.Count > 0; } 
        
                    } 
        
                    public string Error 
        
                    { 
        
                        get 
        
                        { 
        
                            if (m_validationErrors.Count > 0) 
        
                            { 
        
                                return "Customer data is invalid"; 
        
                            } 
        
                            else 
        
                            { 
        
                                return null; 
        
                            } 
        
                        } 
        
                    } 
        
                    public string this[string columnName] 
        
                    { 
        
                        get 
        
                        { 
        
                            if (m_validationErrors.ContainsKey(columnName)) 
        
                            { 
        
                                return m_validationErrors[columnName]; 
        
                            } 
        
                            else return null; 
        
                        } 
        
                    } 
        
                    #endregion

Thanks for your help.

ComboBox

answered on 06 May 2010

2 answers

168 views

[Solved] RadTreeView(WPF) - Reaching Tag Property

Hi,
I added items to a treeview programmatically(with two for loop) and set the tag property to a value for each of an Child item. But there is a problem.

RadTreeViewItem rti;

for (int i = 0; i < ParentCount; i++)

{

rti =

new RadTreeViewItem();

rti.Header = Parent[i].Name;

for (int j = 0; j < ChildCount; j++)

{

rti.Items.Add(Child[j].Name);

rti.Tag = Child[j].Number);

}

MyRadTreeView.Items.Add(rti); //MyRadTreeView is declared at XAML code.

}

I want to reach rti's Tag property from any of an event(Selected, SelectionChange...), but none of these events give me the Tag property's value. The Tag's value comes with null.
How can I achieve this issue?

TreeView

answered on 06 May 2010

1 answer

154 views

Resize the width of the outlookbar

I was wondering how you would allow the user to resize the width of the Outlook Bar at runtime. I am playing with the trial version of the controls and I did not see the ability to resize the outlook bar width once it is on the screen. Do you need to pair this control with another Telerik control to get this functionality? I basically want to set an initial width and give the user the ability to resize. Please let me know if you have an example.

Thanks,

Joel

OutlookBar

answered on 06 May 2010

5 answers

86 views

GridView and .net3.0

Hi ..

does GridView control works with .net 3.0, I know the demo requires .net3.5 but can we use the conrol with application that uses .net 3.0 not 3.5

Thanks
Wisam

GridView

answered on 06 May 2010

7 answers

520 views

[Solved] Root node expand problem

Hi everyone. I have problems on expanding the root node of the treeview at start. I do not use data binding and I have about 4 hierarhical levels. In code at runtime I call the ExpandAll() for the level 0 nodes but they do not expand. If I expand the level 0 nodes afterwards in the UI I can see that all other levels below are expanded.

TreeView

answered on 06 May 2010