Questions on UI for WPF Forum

1 answer

380 views

DataForm Validation - ValidatingItem()

Hi,

i'm validaitin my Item with "ValidatinItem="MyForm_ValidatinItem":

private void VerbindungForm1_ValidatingItem(object sender, System.ComponentModel.CancelEventArgs e)

{

var employer = this.VerbindungForm1.CurrentItem as Verbindungen;

if (employer.Name.Count() < 1)

{

RadWindow.Alert("You have to enter a " + employer.Name);

}

This Works fine, but is it possible to chance the background of this fild now? Or set a border with Tooltip? And how do i stop the Comit if the Validation is false?

Thanks Best Regards
Rene

DataForm

answered on 23 Nov 2012

1 answer

124 views

VS2012 XAML Design Time Exception

Hi,

I'm getting the following XAML design time exception in VS2012.

Exception

NullReferenceException: Object reference not set to an instance of an object.

Here's the stack trace:

   at Telerik.Windows.Controls.RichTextBoxUI.StatusBar.LayoutModeSelector.get_SelectedLayoutMode()
   at Telerik.Windows.Controls.RichTextBoxUI.StatusBar.LayoutModeSelector.set_SelectedLayoutMode(DocumentLayoutMode value)
   at Telerik.Windows.Controls.RichTextBoxUI.RadRichTextBoxStatusBar.OnDocumentLayoutModeChanged()
   at Telerik.Windows.Controls.RichTextBoxUI.RadRichTextBoxStatusBar.OnAssociatedRichTextBoxChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.Activate(Object item)
   at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
   at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
   at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
   at MS.Internal.Data.DataBindEngine.Run(Object arg)
   at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(Object sender, EventArgs e)
   at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()

Any idea's what may be causing it?

Thanks,

Rob

RichTextBox

answered on 23 Nov 2012

0 answers

158 views

ROW numbering format

i already created gridbound column.. wanted to add numbering column due to user request.
i get Error: system.data.datarowview at No column.

<telerik:GridBoundColumn UniqueName="RowNumber" HeaderText="No" EditFormColumnIndex="1"></telerik:GridBoundColumn>

aspx.cs:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
if (e.Item is GridDataItem)
{
GridDataItem dataItem = (GridDataItem)e.Item;
dataItem["RowNumber"].Text = Convert.ToString(e.Item.ItemIndex + 1);

}
}

GridView

asked on 23 Nov 2012

5 answers

107 views

Customize RadGridView row or item

Hi,

I have this RadGridView:

<telerik:RadGridView x:Name="RadGridView1" GroupRenderMode="Flat" IsSynchronizedWithCurrentItem="True"

IsReadOnly="True"

AutoGenerateColumns="False"

CanUserFreezeColumns="False"

CanUserResizeColumns="True">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="#Case" DataMemberBinding="{Binding caseId}" Width="Auto"></telerik:GridViewDataColumn>>

<telerik:GridViewDataColumn Name="CategoriesGridViewDataColumn" Header="Categories" Width="Auto">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<Grid Margin="0" Name="categoriesGird">

<Grid.RowDefinitions>

<RowDefinition Height="1*"/>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="1*"/>

</Grid.ColumnDefinitions>

<TextBlock Grid.Row="0" Grid.Column="0" Background="Red"></TextBlock>

<TextBlock Grid.Row="0" Grid.Column="1" Background="Blue"></TextBlock>

</Grid>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

</telerik:RadContextMenu.ContextMenu>

</telerik:RadGridView>

This give me something like the image in attachments.
As you can see I have 2 TextBlock for each row (column categories). But I want to fill the GridView table with information that I have in a a class that i created (number of categories is dynamic, so I want the number of TextBlock for each row depends how many categories i have in a list):

public class EmailTest

{

public EmailTest() { }

public EmailTest(string caseId, List<TextBlock> categories)

{

this.caseId = caseId;

this.categories= categories;

}

public string caseId{ get; set; }

public List<TextBlock>categories{ get; set; }

}

How can I solve this problem?

GridView

answered on 22 Nov 2012

1 answer

138 views

[Solved] Final release schedule

Hello,

the PivotGrid is a really great control. When is it planned to be final? And will the final control contain some exporting functionality?

Best regards,

Michael

PivotGrid

answered on 22 Nov 2012

1 answer

68 views

Pie Chart Issue

I am generating a pie chart in c# code. The resulting pie chart looks good, except that the labels are all straight along the centre, instead of where they are supposed to be, as can be seen in the image. Any idea what I am doing incorrectly?

Chart

answered on 22 Nov 2012

1 answer

154 views

RadGridView does not scroll to follow position of the keyboard cursor when editing a cell

After following the instruction in the forum post How do you enter multiple lines of text in a cell I now have a nice way to enter multiple lines of text into a cell of my RadGridView control however if you actually attempt to use this for text that is of any significant size you will notice that the RadGridView control will not scroll along with keyboard cursor within the TextBox. To see the effect load the example from the aforementioned post and attempt to type in the the second column and create enough lines so that the text wraps past the bottom of the visible scroll region of the RadGridView. Has anybody found away to work around this? I've noticed all of the scroll into view methods but none seem to be specific to a position within a child control of an edit template of a column of the RadGridView. I'm guessing one could look for changes in size of the hosted TextBox and then attempt to adjust the scroll position of the RadGridView but I'm wondering if anybody else has already solved this problem as it seems like it would be a common one.

After writing this post I realized that the same issue may also exist when entering simple single line text where the right portion of the column happens to be partially off of the horizontal scroll region and sure enough that also exhibits the same problem So I guess my question is a general one, how to make RadGridView follow the keyboard cursor when editing text in one of the cells?

GridView

answered on 22 Nov 2012

1 answer

180 views

Defer Refresh

Is it possible to defer the filtering until some point, suchas when the DataFilter loses focus?
Thanks in advance,
Steve

DataFilter

answered on 22 Nov 2012

0 answers

141 views

Binding two comboboxes to one table with composite primary key

Hello,

Is it possible to bind two comboboxes to one table with composite primary key?

Suppose one has a table MyTable with two fields (int Level, varchar2 Code) which forms composite primary key.

The corresponding entity is

public class MyTable

{

public MyEnum Level {get; set;}

public string Code {get; set;}

}

where MyEnum is some enum.

I would like to bind two comboboxes to the list of such entities so that one combobox shows list of available items of MyEnum,

and the other one list of codes corresponding to the selected Level. Is it possible?

Thanks in advance.

Yours faithfully,

Mikhail.

ComboBox

asked on 22 Nov 2012

2 answers

212 views

[Solved] RadChart as RadGridView column template

Hi,
I'm trying to show a RadGridView with a RadChart in each row.
Binding the grid's ItemSource to the relevant property works, all charts show the data labels,
However, only the last row's chart shows the actual value heights (see attached image).

Another issue is the commented ChartArea.AxisX. uncommenting this property section causes an NullReferenceException to be thrown from Telerik.Windows.Controls.Charting.AxisX.CalculateItemRange(DataSeries dataSeries, Int32 index)

Window1.xaml:

<Window x:Class="testApp.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:my="clr-namespace:testApp"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"

xmlns:telerikChart="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Charting"

xmlns:telerikCharting="clr-namespace:Telerik.Windows.Controls.Charting;assembly=Telerik.Windows.Controls.Charting"

Title="Window1" Height="300" Width="300">

<Window.Resources>

<my:Window1ViewModel x:Key="MyViewModel"/>

</Window.Resources>

<Grid x:Name="LayoutRoot" DataContext="{StaticResource MyViewModel}">

<telerik:RadGridView ItemsSource="{Binding Items}" AutoGenerateColumns="False">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name" DataMemberBinding="{Binding Label}"/>

<telerik:GridViewDataColumn Header="Values">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<telerikChart:RadChart ItemsSource="{Binding Values}"

UseDefaultLayout="False" MaxWidth="200" MaxHeight="100">

<telerikCharting:ChartArea x:Name="MyChartArea">

<telerikCharting:ChartArea.AxisY>

<telerikCharting:AxisY/>

</telerikCharting:ChartArea.AxisY>

<!--<telerikCharting:ChartArea.AxisX>

<telerikCharting:AxisX/>

</telerikCharting:ChartArea.AxisX>-->

</telerikCharting:ChartArea>

<telerikChart:RadChart.SeriesMappings>

<telerikCharting:SeriesMapping ChartAreaName="MyChartArea">

<telerikCharting:SeriesMapping.SeriesDefinition>

<telerikCharting:LineSeriesDefinition LegendDisplayMode="None"/>

</telerikCharting:SeriesMapping.SeriesDefinition>

<telerikCharting:SeriesMapping.ItemMappings>

<telerikCharting:ItemMapping DataPointMember="YValue"/>

</telerikCharting:SeriesMapping.ItemMappings>

</telerikCharting:SeriesMapping>

</telerikChart:RadChart.SeriesMappings>

</telerikChart:RadChart>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</Window>

Window1ViewModel.cs:

using System.Collections.Generic;

using System.Collections.ObjectModel;

namespace testApp

{

class Window1ViewModel

{

public ObservableCollection<ItemsClass> Items { get; set; }

public Window1ViewModel()

{

Items = new ObservableCollection<ItemsClass>

{

new ItemsClass("Test1", new[] {0.1, 0.3, 0.5, 0.2}),

new ItemsClass("Test2", new[] {0.2, 0.3, 0.5, 0.2}),

new ItemsClass("Test3", new[] {0.3, 0.3, 0.5, 0.2})

};

}

public class ItemsClass

{

public string Label { get; set; }

public IEnumerable<double> Values { get; set; }

public ItemsClass(string label, IEnumerable<double> values)

{

Label = label;

Values = values;

}

Any idea?
Thanks,
Edo

Chart

answered on 22 Nov 2012