Questions on UI for WPF Forum

2 answers

186 views

GridViewComboBoxColumn perormance, makes scrolling impossible

Hi,
When i bind 3000 records in RadGrid (only one column) GridViewComboBoxColumn
i got terrible performance.

I need to do this from code behind.

to reproduce problem make WPF in Browser application, and add this page

<Page x:Class="Bug_Demo_ComboBoxColumn_Scroll.Page1"       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"        xmlns:telerikGrid="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"       mc:Ignorable="d"        d:DesignHeight="300" d:DesignWidth="300"       Title="Page1">     <Grid>         <telerik:RadGridView              Name="dgDynGrid"                        AutoGenerateColumns="False"                            EnableColumnVirtualization="True"             EnableRowVirtualization="True"                         ShowGroupPanel="False"             IsFilteringAllowed="False"             DataLoadMode="Asynchronous"               CanUserInsertRows="True"                          CanUserResizeColumns="False"             CanUserFreezeColumns="False"             RowIndicatorVisibility="Collapsed"               />          </Grid> </Page>

Then make two classes:

    public class Persons     {         public int Id { get; set; }         public string Name { get; set; }         public string PlaceId { get; set; }     }

    public class Place     {         public int PlaceId { get; set; }         public string PlaceName { get; set; }     }

in constructor of "Page1" fill test data:

List<Place> places = new List<Place>();             for (int i = 0; i < 3000; i++)             {                 Place p = new Place();                 p.PlaceId = i;                 p.PlaceName = "PlaceWithID" + i.ToString();                 places.Add(p);             }             List<Persons> persons = new List<Persons>();             for (int i = 0; i < 3000; i++)             {                 Persons p = new Persons();                 p.Id = i;                 p.PlaceId = i.ToString();                 persons.Add(p);             }

Add column:

Telerik.Windows.Controls.GridViewComboBoxColumn column = new Telerik.Windows.Controls.GridViewComboBoxColumn();             column.DataMemberBinding = new Binding("PlaceId");             column.DisplayMemberPath = "PlaceName";             column.SelectedValueMemberPath = "PlaceId";             column.ItemsSource = places;             dgDynGrid.Columns.Add(column);             dgDynGrid.ItemsSource = persons;

is it possible to turn on virtualization in GridViewComboBoxColumn ?

GridView

answered on 03 Sep 2011

1 answer

38 views

It is possible mark in timeline bar the seleted appointment(s) and the appointment dragged?

It is possible mark in timeline bar the seleted appointment(s) and the appointment dragged? The link contains a screenshot where I've drawn the red lines with the Paint program:

ScheduleView

answered on 02 Sep 2011

2 answers

65 views

Not answered how to insert update delete auto use RadGridView?

GridView windows control can insert update delete automatic and insert connection to SQL.How can i do like that in RadGridView?if can,can you make a video to easy understand?I want to insert update delete like the demo Command of RadGridView 100% with SQL server using C#.how con i do?

thank you thank you very very much!Please!

GridView

answered on 02 Sep 2011

9 answers

531 views

RadGridView validation and IDataErrorInfo

I am using the RADGrid view in a WPF application and need to add validation for a couple of properties that are bound to the grid. I have implemented IDataErroinfo on may data object class that is the source of my binding. The validation is working almost like I need it to.

when the application loads and my property values are not valid the validation works as expected. My cells with invalid data is surrounded with a red line and I get the icon displayed in front of the row with errors. When I edit the cell and correct the data the red outline of the cell goes away it I tab out the cell or hit enter. However the error icon stays unless I hit the enter key or tab through all the cells in the row.

The behavior I am trying to achieve is that when the user leaves(by using the enter key,tab out of the cell or when the cell loses focus) the cells and no other cells contain data the error icon disappears as well.

I am also using the cell validating event on the RadGrid view to validate the cell data and that seems to work except the error indicator stays there.

Thanks,
Alan Frye

GridView

answered on 02 Sep 2011

3 answers

285 views

Keep RadButton on Pressed State or Activated state.

Hello, how can I keep my button from its pressed state? For example, I clicked on the ViewByday Button, then its pressed state or activated state is still there unless i'll click another radbutton. Please help. Thanks

Buttons

answered on 02 Sep 2011

2 answers

135 views

Value Converter In GridViewDataColumn in RadTreeListView colums

Hi,
I am having an issue in binding a Value Converter in a GridViewDataColumn in RadTreeListView columns. If i add the same to DataTemplate then it works fine. Is there any way to directly use with the GridViewDataColumn .

Please find the code below.

This does not work.

<

telerik:RadTreeListView x:Name="rtlvPeopleInfo" >

<telerik:RadTreeListView.Columns>

<telerik:GridViewDataColumn x:Name="gvcPlanFinish" DataMemberBinding="{Binding PlanEndDate}" Header="Plan Finish"

Background="{Binding PlanEndDate, Converter={StaticResource PlanFinishBackColorConverterKey}}"
DataFormatString="{}{0:MM-dd-yyyy}" />

</telerik:RadTreeListView.Columns>

</telerik:RadTreeListView>

But if i am doing the same in code behind with data template that works fine

private

void SetValueConvertersInColumns()

{

GridViewDataColumn gvcPlanFinish = new GridViewDataColumn();

FrameworkElementFactory tbPlanWork = new FrameworkElementFactory(typeof(TextBlock));

Binding bndText = new Binding("PlanEndDate");

bndText.Mode =

BindingMode.TwoWay;

tbPlanWork.SetBinding(

TextBlock.TextProperty, bndText);

Binding bndPlanWorkBackGround = new Binding("PlanEndDate");

bndPlanWorkBackGround.Converter =

this.FindResource("PlanFinishBackColorConverterKey") as IValueConverter;

tbPlanWork.SetBinding(

TextBlock.BackgroundProperty, bndPlanWorkBackGround);

DataTemplate dataTemplate = new DataTemplate();

dataTemplate.VisualTree = tbPlanWork;

gvcPlanFinish.CellTemplate = dataTemplate;

gvcPlanFinish.CellTemplate.Seal();

gvcPlanFinish.DataMemberBinding =

new Binding("PlanEndDate");

rtlvTreeListView.Columns.Add(gvcPlanFinish); //Adding the new column

}

TreeListView

answered on 02 Sep 2011

1 answer

122 views

Displaying a text message

Hello I am working with the RadDatePicker and it works fine but I can't seem to figure out how tp display text in the textbox part, other than a watermark. We use it for insurance expiration dates and one of the possible fields would be "No End" instead of a date. How can I do this? Thank you again for your help.

Sean

DatePicker

answered on 02 Sep 2011

3 answers

258 views

problem with radwindow as usercontrol

Hello i try the latest internal build from Q2 2011 for WPF 4. I have some radwindows as usercontrol
defined in the main xaml file. I get compiler errors and can't get it to run.
In code i call CtlNewPerson.ShowDialog()
This sample is runnning under Q1 SP1 latest internal build correctly.
Can you please check this issue.
best regards ...

<telerik:RadWindow x:Name="WindowNewPerson" Width="800" Height="626" Header="Test ..." WindowStartupLocation="CenterScreen" telerik:StyleManager.Theme="Windows7" FontFamily="Verdana" IsRestricted="True" ResizeMode="NoResize" >

<telerik:RadWindow.Background>

<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">

<GradientStop Color="White"/>

<GradientStop Color="#FFE5EAEC" Offset="1"/>

</LinearGradientBrush>

</telerik:RadWindow.Background>

<telerik:RadWindow.Effect>

<DropShadowEffect BlurRadius="50" ShadowDepth="10" Opacity="0.5" Direction="290" RenderingBias="Performance"/>

</telerik:RadWindow.Effect>

<local:ScrNewPerson x:Name="CtlNewPerson"/>

</telerik:RadWindow>

Window

answered on 02 Sep 2011

3 answers

141 views

Handling Wrong Image Tags

Hi

I'm currently evaluating the RichtextControl of Telerik.

When I try to import HTML with a image tag, which has an image that does not exist, I got a pixelFormat error.

How can I handle missing images in HTML ?

Here is the load code

  public void Load(string htmlInput)
        {
             HtmlFormatProvider provider = new HtmlFormatProvider();
        
            RadDocument telDoc = provider.Import(input);
            telerikTextBox.Document = telDoc;
 
            //spellchecker language anpassen
            telerikTextBox.IsSpellCheckingEnabled = false;
 
            this.telerikTextBox.SpellChecker.SpellCheckingCulture = new CultureInfo("en-US");        
        
        }

I tried it with the using the

LoadImageFromUrl

event from HtmlImportSettings

But this didn't helped

 Bitmap image = new Bitmap(16, 16);
 
        void settings_LoadImageFromUrl(object sender, LoadImageEventArgs e)
        {
            if (e != null)
            {
 
                MemoryStream memStream = new MemoryStream();
 
                image.Save(memStream, ImageFormat.Bmp);
 
               
 
                 e.ImageElement.Init(memStream, ".bmp");
            }
        }

RichTextBox

answered on 02 Sep 2011

1 answer

106 views

Ambiguous match found

I have a problem changing a property of the RadTileView control (e.g. IsEnabled) using the properties panel. I get always an error message. I did the following steps:

Create a new WpfApplication
I dropped a RadExpander control
I dropped a RadTileView control
Select the RadExpander, click the IsEnabled property in the property panel
à there is no problem
Select the RadTileView, click the IsEnabled property in the property panel
à I get the message “Property value is not valid”

Error message in MainWindow:

Ambiguous match found.

at System.RuntimeType.GetPropertyImpl(String name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)

at System.Type.GetProperty(String name)

at MS.Internal.ComponentModel.DependencyPropertyKind.get_IsDirect()

at System.ComponentModel.DependencyPropertyDescriptor.FromProperty(DependencyProperty dependencyProperty, Type targetType)

at Microsoft.Expression.Platform.WPF.WpfDependencyPropertyImplementation.get_Attributes()

at Microsoft.Expression.DesignModel.Metadata.DependencyPropertyReferenceStep.get_Attributes()

at Microsoft.Expression.DesignModel.Metadata.ClrObjectMetadata.InitializeAlternateContentPropertiesIfNecessary()

at Microsoft.Expression.DesignModel.Metadata.ClrObjectMetadata.GetContentProperties()

at Microsoft.Expression.DesignModel.Metadata.ClrObjectMetadata.get_ContentProperties()

at Microsoft.Expression.DesignModel.Core.ViewNodeManager.InvalidateInternal(List`1 invalidRoots, Boolean forceValidateExpressionCache)

at Microsoft.Windows.Design.Platform.ViewProducerBase.ApplyUpdate(Delta delta)

at Microsoft.Windows.Design.Platform.ViewProducerBase.IncrementalRebuild(DocumentTreeManager tree, Damage damage)

at Microsoft.Windows.Design.Platform.ViewProducerBase.UpdateView(DocumentTreeManager tree, Damage damage)

at Microsoft.Windows.Design.DocumentModel.ViewProducer.UpdateView(UpdateDamageArguments args)

TileView

answered on 02 Sep 2011