Questions on UI for WPF Forum

5 answers

127 views

TreeView calls CollecectionChanged event on Drag&Drop

So the structure of my tree is something like:

RootObject

ChildObject1

GrandChildObject1

ChildObject2

GrandChildObject2

Problem 1: When I drag and drop GrandChildObject1 to ChildObject2, the collection in ChildObject1 calls its Delete method, and I don't want that, since there's a few steps I need to do before removing GrandChildObject1 from ChildObject1.

Problem 2: When I drop GrandChildObject1 into ChildObject2, there's a few steps I need to do before finally adding GrandChildObject1 to ChildObject2. So doing this, also triggers the Add Method, so I end up having two children of the same item (one added by the TreeView itself, and one I add with my own method in the TreeView.RadTreeView_DragEnded event).

So, is there a way to prevent the TreeView from handling this, and not losing the little Drag&Drop preview when the drag starts? I just want to disable the TreeView from triggering a change in the Collection. I found out it was doing it by setting a breakpoint here:

                    private void GrandChildren_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)         
            {         
                this.NotifyPropertyChanged("GrandChildren"); // breakpoint here        
            }         

EDIT: The collection of GrandChildren is an ObservableCollection<T>, and I can't change that to BindingList<T> or List<T>

Thanks!

TreeView

answered on 08 Apr 2010

2 answers

223 views

GridViewCell Background color binding issue

Hello,

I would like to bind cell background color to cell value (via converter of course). However when I declare style in GridViewResource like this:

    
            <Style TargetType="{x:Type telerik:GridViewCell}"> 
        
              <Setter Property="Background"> 
        
                <Setter.Value> 
        
                  <SolidColorBrush Color="{Binding Converter={StaticResource decimalToColor}}" /> 
        
                </Setter.Value> 
        
               </Setter> 
        
            </Style>

which simply should return Brushes.Red.Color for value < 0 Green for value > 0 and left color White when value is equal to 0. In debug mode I discovered that value passed to value converter is eqal to whole object (I'm binding ItemSource to collection of custom business objects) instead of being equal to object property value which is binded to column.

When I try to do something like this:

    
            <telerik:GridViewDataColumn Width="45" DataType="{x:Type sys:Decimal}" Header="H1" DataMemberBinding="{Binding Path=H1, Mode=TwoWay}" DataFormatString="{}{0:n0}" IsGroupable="False" IsSortable="False" IsFilterable="False"> 
        
              <telerik:GridViewColumn.CellStyle> 
        
                 <Style TargetType="{x:Type telerik:GridViewCell}"> 
        
                   <Setter Property="Background"> 
        
                     <Setter.Value> 
        
                       <SolidColorBrush Color="{Binding Converter={StaticResource cellBGConverter}}" /> 

                     </Setter.Value> 
        
                   </Setter> 
        
                </Style> 
        
              </telerik:GridViewColumn.CellStyle> 
        
            </telerik:GridViewDataColumn>

it's even working, color is changed (value converter gets cell value), but I get an error:

"System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=H1; DataItem='DailyPosition' (HashCode=7712694); target element is 'SolidColorBrush' (HashCode=16353339); target property is 'Color' (type 'Color')
"
which cause low performance :(
Any ideas? How to get cell value in first style declaration?

Thanks in advance,
MC

GridView

answered on 08 Apr 2010

0 answers

106 views

Conversion of WordML tags to HTML Tags

Hi Team,

May I'm posting in worng place, but i don't know where to post it.

Actually my problem is....

I have content which is in wordml format stored in database, now I have to replace those tags and should display it in Textbox again.

my actual content in DB is

------------------
<w:document xmlns:ve="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:wne="http://schemas.microsoft.com/office/word/2006/wordml" xml:space="preserve"> <w:body> <w:sect> <w:p> <w:pPr> <w:jc w:val="left" /> <w:spacing w:after="180" w:before="180" /> </w:pPr> <w:r> <w:rPr> <w:rFonts w:ascii="Tahoma" w:hAnsi="Tahoma" w:cs="Tahoma" /> <w:sz w:val="16" /> <w:b w:val="off" /> <w:i w:val="off" /> <w:color w:val="000000" /> </w:rPr> <w:t>dsafdsfdsafdfdsfdsfdfdf</w:t> </w:r> </w:p> <w:p> <w:pPr> <w:jc w:val="left" /> <w:spacing w:after="180" w:before="180" /> </w:pPr> <w:r> <w:rPr> <w:rFonts w:ascii="Tahoma" w:hAnsi="Tahoma" w:cs="Tahoma" /> <w:sz w:val="16" /> <w:b w:val="off" /> <w:i w:val="off" /> <w:color w:val="000000" /> </w:rPr> </w:r> </w:p> </w:sect> </w:body> </w:document>

----------------------
Now I've to display actual content in Textbox by removing tags

Please suggest me a solution or any replated information

Thanks in advance.

Regards,

Sundari

General Discussions

asked on 07 Apr 2010

1 answer

128 views

Licence needed for using the maps?

Hi there,

when using the Map control, do I need to get also a licence from the map provider (Bing->Microsoft)?

Kind regards,
Sörnt

Map

answered on 07 Apr 2010

1 answer

308 views

Databind PeogressBar example needed

Is it possible to databind the value of a RadProgressBar in XAML? For example:

    
            <telerik:RadProgressBar  
        
                 Name="PercentBar"  
        
                 Orientation="Horizontal"  
        
                 Margin="3"  
        
                 Value="{Binding Path=My_Percent, StringFormat=P0}" />

Seems simple, but this particular code throws the following error:

    
            System.InvalidOperationException was unhandled 
        
            Message: A TwoWay or OneWayToSource binding cannot work on the read-only  
        
            property 'My_Percent' of type 'System.Data.Common.DataRecordInternal'.

There is no example in the current documentation for the control.

ProgressBar

answered on 07 Apr 2010

2 answers

68 views

Default Styles

Hi...

Do you have some where your default styles for the grid view ?

I can't manage to load them in blend and modify them, so I thought to manually insert them to my app.xaml.

10x

Eran.

GridView

answered on 07 Apr 2010

7 answers

726 views

MDi for rad windows

Dear all
can some one give simple code for makie mdi for radwindows
(Multiple Document Interface (MDI) Design)

i need to make an aplication that creates multi radwindow on the mainwindow.
1.all the subwindow cannot go out of the mian page.
2.when i activiate the main window all the sub window will still on the front.

Window

answered on 07 Apr 2010

1 answer

235 views

MediaPlayer and/or QuickTime

Hi!

We have two issues concerning the title of this post:

1) We're porting an application from VB6 to WPF. In VB6 we're using QuickTimePlayer to play MP4 files, but WPF MediaPlayer does not native play them and there is not any Support/Control using QuickTimePlayer directly. Questions: Is there a way to get MP4 files running in MediaPlayer (ideally without installing huge codec packages)? Or is there a way to get QuickTimePlayer into WPF not using WindowsFormsHost?

2) In the WPF application we need to play video files from stream because they are cryptographically secured an will be encrypted while streaming to the player (because only the application itself should be able to play the files). Is there a way within MediaPlayer?

Thx!

General Discussions

answered on 07 Apr 2010

7 answers

164 views

RadDocking Object reference not set to an instance of an object when hosted in windows forms

Hello,

I'm running internal build 2010.1.326.35. When i host the RadDocking control inside of a windows form using a ElementHost I'm getting "Object reference not set to an instance of an object."

sample code.

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.ComponentModel; 
        
            using System.Data; 
        
            using System.Drawing; 
        
            using System.Linq; 
        
            using System.Text; 
        
            using System.Windows.Forms; 
        
            namespace WindowsFormsApplication1 
        
            { 
        
                public partial class Form1 : Form 
        
                { 
        
                    public Form1() 
        
                    { 
        
                        try 
        
                        { 
        
                            InitializeComponent(); 
        
                            this.elementHost1.Child = new UserControl1(); 
        
                        } 
        
                        catch (Exception ex) 
        
                        { 
        
                            MessageBox.Show(ex.ToString()); 
        
                        } 
        
                    } 
        
                } 
        
            }

usercontrol code

    
            <UserControl x:Class="WindowsFormsApplication1.UserControl1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:radDock="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Docking"> 
        
                <Grid> 
        
                    <radDock:RadDocking /> 
        
                </Grid> 
        
            </UserControl>

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Text; 
        
            using System.Windows; 
        
            using System.Windows.Controls; 
        
            using System.Windows.Data; 
        
            using System.Windows.Documents; 
        
            using System.Windows.Input; 
        
            using System.Windows.Media; 
        
            using System.Windows.Media.Imaging; 
        
            using System.Windows.Navigation; 
        
            using System.Windows.Shapes; 
        
            namespace WindowsFormsApplication1 
        
            { 
        
                /// <summary> 
        
                /// Interaction logic for UserControl1.xaml 
        
                /// </summary> 
        
                public partial class UserControl1 : UserControl 
        
                { 
        
                    public UserControl1() 
        
                    { 
        
                        InitializeComponent(); 
        
                    } 
        
                } 
        
            }

any suggestions for a workaround would be great. we have a conference coming up next week to demonstrate our product and this control is in all of our WPF maintenance screens.

Thanks much
~Boots

Docking

answered on 07 Apr 2010

2 answers

271 views

Refresh Gridview when database updated

Problem:
1. How to Refresh Radgridview when i Insert Record in database and update record.
2.when i am Insert or Update Record than in radgridview that row is selected.

i am useing sql server 2005.

i am use to set data source of radgridview like " radgridview1.ItemsSource = ds; " ==> ds is dataset.

i am beginner so if possible than tel me by code it is easy to understand.......

can u help me as early as possible ....

GridView

answered on 06 Apr 2010