Questions on UI for WPF Forum

2 answers

384 views

RadComboBox and RadTextBox with custom Validation classes

I have a WPF application that I am validating ComboBox and TextBox controls using custom Validation classes in XAML.
The following is my ComboBox and it is a required field. I have not found any examples of similar code for validation using RadComboBox.

<ComboBox Width="225" VerticalAlignment="Center" IsEditable="True" IsReadOnly="False"> 
   <ComboBox.ItemTemplate> 
      <DataTemplate> 
         <TextBlock Text="{Binding}" /> 
      </DataTemplate> 
   </ComboBox.ItemTemplate> 
   <ComboBox.Text> 
      <Binding Path="Name" UpdateSourceTrigger="LostFocus"
               NotifyOnValidationError="True"
               NotifyOnSourceUpdated="True"
               NotifyOnTargetUpdated="True"> 
          <Binding.ValidationRules> 
             <Validator:RequiredFieldRule FieldName="Field Name Prompt" /> 
          </Binding.ValidationRules> 
       </Binding> 
    </ComboBox.Text> 
</ComboBox>
Here is my Window.Resources code to display the validation error message:
<Style TargetType="ComboBox"> 
    <Setter Property="VerticalAlignment" Value="Center" /> 
    <Style.Triggers> 
        <Trigger Property="Validation.HasError" Value="true"> 
            <Setter Property="ToolTip"
                    Value="{Binding RelativeSource={x:Static RelativeSource.Self}, 
                            Path=(Validation.Errors).CurrentItem.ErrorContent}" />
RequiredFieldRule is a class in my application derived from ValidationRule.  
 
 


When I replace 'ComboBox' with ' RadComboBox' the Style used to set the ToolTip with the error message does not work.  
Any help would be greatly appreciated.

General Discussions

answered on 26 Oct 2010

9 answers

210 views

How to sync Grid with a Textbox?

Hi there,

I try to syncronisize the Grid with one Textbox. Everytime I click on a other cell, the Textbox should show the value of the cell. Now when I change the value of the cell, the text in the Textbox have to change too. (Like MS-Excel do)
The datasource of the Grid is a DataTable and dependending to this DataTable the Grids Rows and Columns where build by Runtime. The Datatable will get his Data from various Textfiles so it should be different each time its loaded.

I hope someone understand what I want to say and can help me.

GridView

answered on 26 Oct 2010

1 answer

157 views

Columns does not displaying

Hello!

Now I testing a trial version of RadControls, and I have one issue:

I trying to create RadGridView with 40+ columns, with binds to ObservableCollection<>.

When I start my application, I can see the horizontal scrollbar, but not all of my columns are visible. If I will make several random clicks on RadGridView component, scrollbar width increases, and all columns became visible. What I do wrong?

1.<Grid>

2. <telerik:RadGridView Name="dataGrid1"

3. EnableColumnVirtualization="True"

4. EnableRowVirtualization="True"

5. DataLoadMode="Asynchronous"

6. />

7.</Grid>

01.public partial class MainWindow : Window

02. {

03. /// <summary>

04. /// Here is sample data class with a lot of fields

05. /// </summary>

06. class MyDataClass

07. {

08. public bool IsChecked { get; set; }

09. public int Number { get; set; }

10. public int Num43ber { get; set; }

11. public int Num4ber { get; set; }

12. public int Nu543mber { get; set; }

13. public int Num45ber { get; set; }

14. public int Nu5343mber { get; set; }

15. public int Num435ber { get; set; }

16. public int Num4vd5ber { get; set; }

17. public int Nu543sdmber { get; set; }

18. public int Num4sd5ber { get; set; }

19. public int Nu43mber { get; set; }

20. public int Num4fsdf35ber { get; set; }

21. public int Nu54fds3vmber { get; set; }

22. public int Nu52435mber { get; set; }

23. public int Num43dsad5ber { get; set; }

24. public int Num5435ber { get; set; }

25. public int Nu4532mber { get; set; }

26. public int Nu45mber { get; set; }

27. public int f5344 { get; set; }

28. public int Nufdmber { get; set; }

29. public int Nu3fg45mber { get; set; }

30. public int Nu52dfg435mber { get; set; }

31. public int Numfdg43dsad5ber { get; set; }

32. public int Numfdg5435ber { get; set; }

33. public int Nudfg4532mber { get; set; }

34. public int Nu4fdg5mber { get; set; }

35. public int f53fdg44 { get; set; }

36. public int Nufgfdmber { get; set; }

37. public int Nufgdf345mber { get; set; }

38. //

39. public int Nufds45mber { get; set; }

40. public int f5dsf344 { get; set; }

41. public int Nasdfufdmber { get; set; }

42. public int Nadsfu3fg45mber { get; set; }

43. public int Nudasf52dfg435mber { get; set; }

44. public int Nasdfumfdg43dsad5ber { get; set; }

45. public int Nudsafmfdg5435ber { get; set; }

46. public int Nuadsfdfg4532mber { get; set; }

47. public int Nudsf4fdg5mber { get; set; }

48. public int f5dsaf3fdg44 { get; set; }

49. public int Nuadffgfdmber { get; set; }

50. public int LASTCOLUMN { get; set; }

51. }

52.

53. // here is sample collection

54. ObservableCollection<MyDataClass> list;

55. public MainWindow()

56. {

57. InitializeComponent();

58. list = new ObservableCollection<MyDataClass>();

59. // fill the collection with some elements

60. for (int i = 0; i < 50; i++)

61. list.Add(new MyDataClass() { IsChecked = true, Number= i });

62. // bind it to RadGridView

63. dataGrid1.ItemsSource = list;

64. }

65. }

Thanks. And sorry for my bad english, please :(.

GridView

answered on 26 Oct 2010

1 answer

69 views

Filtering with List

Hello,

Here is my question.

We have the GridView, and some columns are bound to the List<MyType>.We've made a custom filter like shown in some of your. demos. Now we need to filter those columns, but the DataMemberBinding is set to the List. Some code:

01.<DataTemplate x:Key="cellTemplate">

02. <DataTemplate.Resources>

03. <my:PercentsConverter x:Key="PerConv">

04. </DataTemplate.Resources>

05. <TextBlock>

06. <TextBlock.Text>

07. <MultiBinding Converter ="{StaticResource PerConv}"

08. ConverterParameter="MyParam">

09. <Binding Path="ListValues"/>

10. <Binding Path="SomeValues"/>

11. </MultiBinding>

12. </TextBlock.Text>

13. </TextBlock>

14.</DataTemplate>

01.var tCol = new GridViewDataColumn()

02.{

03. Header = temp.ToString(),

04. CellTemplate = datatemplate,

05. CellStyleSelector = new CellStyleSelector(),

06. DataMemberBinding = new Binding("ListValues"),

07. IsFilterable = true,

08. FilteringControl = new Filtering()

09. {

10. Minimum = 0,

11. Maximum = 100

12. },

13.};

When we start the program there is no filter at these columns at all.

GridView

answered on 26 Oct 2010

3 answers

545 views

XamlParseException was thrown

Type reference cannot find type named '{clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls}TransparentTheme'.
   at MS.Internal.Xaml.Context.ObjectWriterContext.ServiceProvider_Resolve(String qName)
   at MS.Internal.Xaml.ServiceProviderContext.System.Windows.Markup.IXamlTypeResolver.Resolve(String qName)
   at System.Windows.Markup.TypeTypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at System.Windows.Baml2006.TypeConverterMarkupExtension.ProvideValue(IServiceProvider serviceProvider)
   at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider)

ComboBox

answered on 26 Oct 2010

1 answer

234 views

How to set focus on a ComboBox cell and open the combo box.

Hi..
I have a button that adds a new row to the grid. I need to set focus to the new row and open the first cell - which is combo box and set focus.
I have tried the following but it does not work.. any ideas? thanks

this.gridPO_det.ScrollIntoViewAsync(new_det

, (f) =>

{

GridViewRow row = f as GridViewRow;

if (row != null)

{

GridViewCell cell = row.Cells[0] as GridViewCell;

cell.BeginEdit();

Dispatcher.BeginInvoke(

new Action(() =>

{

((

RadComboBox)cell.GetEditingElement()).IsDropDownOpen = true;

}));

}

});

GridView

answered on 26 Oct 2010

1 answer

156 views

Assigning RadContextMenu to Custom Templated Control

I have several custom WPF controls whose visual representations are defined by a XAML template. My goal is to define a RadContextMenu in a ResourceDictionary and then, in code, assign it to be the context menu for my custom controls, similary to the following:

ResourceDictionary resourceDictionary = new ResourceDictionary();

resourceDictionary.Source = new Uri(

"MyLibrary;component/Resources/Resources.xaml", UriKind.Relative);

Grid mainGrid = Template.FindName("mainGrid", this) as Grid;

if(mainGrid != null)

{

RadContextMenu.SetContextMenu(this, (RadContextMenu)resourceDictionary["DefaultControlContextMenu"]);

}

At runtime, the RadContextMenu gets assigned correctly, but whenever I right-click on my custom control the following exception is thrown:

System.InvalidOperationException: Cannot perform action because the specified Storyboard was not applied to this object for interactive control.

I've noticed that others have gotten a similar exception with the RadTreeView and RadTransitionControl, and I need to know what to do for a workaround on this. Is the problem related to the fact that I am using a control template?

Thanks,

Greg

ContextMenu

answered on 26 Oct 2010

1 answer

71 views

confirmation prompt when editing cell

I need to show a Confirm prompt one a user is finished editing a cell.

Here is my current CellEditEnded eventhandler:

private void gvAccounts_CellEditEnded(object sender, GridViewCellEditEndedEventArgs e)

{

if (e.EditAction == Telerik.Windows.Controls.GridView.GridViewEditAction.Cancel)

return;

oldNickname = e.OldData.ToString();

newNickname = e.NewData.ToString();

// nothing has changed

if (oldNickname == newNickname)

return;

RadWindow.Confirm("Are you sure you want to change this nickname to " + newNickname + "?", this.ChangeNickname);

}

oldNickname and newNickname are global variables so I can keep up with the new/old values.

however, when any button on the prompt is clicked (or anywhere on the screen is clicked) another CellEditEnded event is fired but e.OldData is the same as e.NewData which overwrites my global variables.

I don't understand why the second event is firing.

GridView

answered on 26 Oct 2010

1 answer

112 views

Series Connectors not getting disabled

Hi,

I am drawing a Rad Chart with multiple line series. And although while creating a series I explicitly write code to disable the connector:

DataSeries lineSeries = new DataSeries();
SplineSeriesDefinition lineDataSeries = new SplineSeriesDefinition();
LabelSettings settings = new LabelSettings();
settings.ShowConnectors = false;
settings.Distance = 10;
lineDataSeries.LabelSettings = settings;
.
.
.

Later I assign this series to the RadChart's default view. But still it doesn't disable the labels.

LineChartTrancheResults.DefaultView.ChartArea.DataSeries.Add(lineSeries )

Do I need to do something else?

Thanks,
Farhan

Chart