.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
MarieAdela
Imran Ghani
Post New Web Links

Get Control screen position from a MVVM View Model (not using CodeBehind in the control)

Posted By:      Posted Date: October 07, 2010    Points: 0   Category :WPF
 

Hi, I am using a MVVM pattern for a WPF UserControl. I need to be able to position a dialog over the top of the control, so I need the top left screen coords for the control.

IF, I was to use code behind, the following seems to do the job..

 private void UserControl_MouseDoubleClick(object sender, MouseButtonEventArgs e)
  {
   Point controlPos = PointToScreen(new Point(0, 0));
   ...
   }

The controlPos above seems to give the correct result. However, is there anyway of doing this without having to use any code behind in the actual control (eg have the code purley perhaps in the View model class, of have something in the Controls XAML?

Thanks in advance for any help

regards

Peter




View Complete Post


More Related Resource Links

How to position one control relative to another one even after resizing windows?

  

I used following Jquery code trying to make image close to a table. It worked fine after first load, but the position changed after window is resized. Any ideas? thanks

$(document).ready(function() {
            var pos = $("#mytable").offset();
            var width = $("#mytable").width();
            var left = pos.left + width + 20;
            var top = pos.top + 200;
            $("#ctl00_ContentPlaceHolder1_imgPreview").css({
                position: 'absolute',
                zIndex: 5000,
                left: left,
                top: top
            });
        });


Custom Control Design view error

  

Hi

I have created a custom control from scratch and it works fine as in you can build the project that uses it and it works fine at runtime. Problem is when you go to design view the control shows an error in the place of where the control should be rendered.

Error: '<SomeValue>' Could not be set to '<SomeProperty>'


This shows up on all my custom set properties. These properties are created as basic as possible. I can give the properties values in Source view and run the app just fine. I can even add a Onclick event. If I don't set any custom properties the control will render fine in Design view. It's only when I set a value to a custom property.


Property Code Example:

public string Text
        {
            get
            {
                string ret = "";
                object obj = ViewState["Text"];
                if (obj != null)
                {
                    ret = obj.ToString();
                }
                return ret;
            }
            set
            {
                ViewState["Text"] = value;
            }
        }


I've even removed the Category and Description tags with no difference.

I don't know if what I said makes sens, but I hope it

Applying custom CSS to the MOSS 2007 Calendar control Month view

  

hi,

I have a requirement to use the MOSS 2007 Calendar Control - month view is to apply a custom css to have a look and feel as per our requirements.

We tried applying the custom css to the MOSS 2007 calendar control - month view, it does take the custom css and applies it, but when i click on any date and come back to the calendar control, it changes the CSS of the MOSS calendar control back to the default one.

Let me know if anyone has any suggestion on  how to customize the calendar control for css for our intranet application.

Your response would be highly appreciated.

regards

Ram

 

 


PC

Templates in MVC 2 View User Control?

  

Is there a way to create templates in an MVC 2 View User Control much like the ability of a Web User Control? or should I just use a Web User Control? With MVC 2, should Web User Controls be avoided?


MVVM and Animation Control

  
I've been struggling with what should be a fairly straightforward issue...hoping someone's got a solution.I'm using MVVM in a scenario where I'm using a MediaElement in a View. The MediaElement has a Storyboard that I customize using DataBinding. The scenario works well when I'm using EventTriggers to control playback, but I have not discovered how to manipulate things using DataTriggers.My Storyboard consists of a ParallelTimeline, which contains the MediaTimeline (with Source, BeginTime and Duration databound to the ViewModel. I've got two buttons that are attached to the Storyboard in EventTriggers calling PauseStoryboard and ResumeStoryboard. This works well, but it's not the best paradigm for me.I am trying to accomplish a design where, if I have two such Views each containing a MediaElement with this type of Storyboard, when one Storyboard reaches its end point, the other View's MediaElement is triggered to play.I have tried to use a DataTrigger design, but I am having problems freezing the Storyboard because I'm using DataBinding to set some of the Storyboard parameters.Does anyone have any ideas as to how I can control a MediaElement via Storyboard/Timeline using DataTrigger instead of EventTrigger? Am I missing something obvious in MVVM?--- Jim ---

Using MVVM with new Ribbon Control Library

  
Hi, As new ribbon for wpf http://www.microsoft.com/downloads/details.aspx?FamilyID=2BFC3187-74AA-4154-A670-76EF8BC2A0B4&displaylang=en is officially released, I am looking for a way to use new ribbon control library in my application respecting the MVVM pattern, I used ribbon 2007 repecting MVVM by extending the RibbonCommand with CanExecute and Exceute properties, but Microsoft has dumped RibbonCommand in new release. Any help on new Ribbon with MVVM is appreciated.

Drag drop functinality not working on Explore View control for file containing special characters in

  
We have created a control which uses explorer view control for file drag and drop. This functinality works fine for a file having filename without special characters but it gives an error if we drag and drop a file having special characters in the file name. The reason for this is Sharepoint uses WebDAV protocol for file transfer to the Sharepoint document library and WebDAV protocol has limitation that it does'nt accept file with special characters. Please let me know the way how I can accomplish drag and drop of file with special characters in file name, onto Explorer View control with WebDAV.

Drag drop functinality not working on Explore View control for file containing special characters in

  
We have created a control which uses explorer view control for file drag and drop. This functinality works fine for a file having filename without special characters but it gives an error if we drag and drop a file having special characters in the file name. The reason for this is Sharepoint uses WebDAV protocol for file transfer to the Sharepoint document library and WebDAV protocol has limitation that it does'nt accept file with special characters. Please let me know the way how I can accomplish drag and drop of file with special characters in file name, onto Explorer View control with WebDAV.

Building a user control with MVVM

  
Hi there, I created a custom user control that retrieve rows from database and will create all the buttons on runtime. My current approach is write all codes in the code behind of user control. And also I add a click event handler to each buttons that created on runtime. When any of the button is clicked, inside the click handler function will raise a RoutedEvent. And at the parent control, I add a handler to the custom user control to handle which button is clicked. The problems is : 1) I don't want to write all codes at the code behind. I tried to create a view model class for the user controls, but I failed to bind the event to view model as I wanted to retrieve the object that call this event. ICommand doesn't provide the information for it. 2) Even if I successful created a view model class, when a click event is triggered, the view model will handle it then it fire another event to user control class then the user control class fire another event to the main parent control. Which I think this is stupid >_< 3) I want to know how to user MVVM in this situation. Thanks & Regards, Rambo Ong

Can't access a control in a listview layout template with codebehind

  
While running ItemDetabound upon load of a listivew, I am trying to access the text in a label of the LayoutTemplate of a different Listview.  It works fine if I try access the same labels under the same names if they are in the same listview, but not if they are in a different one.  It was working for a while, can't figure out what I changed, but now says that object doesn't exist.   Here is the html code for the labels: <LayoutTemplate> <table ID="Table2" runat="server" cellpadding="0" cellspacing="0"> <tr ID="Tr1" runat="server" style="padding-left: 0px"> <th ID="Th1" runat="server" style="text-align: left; white-space:nowrap; "> <asp:Label ID="Label1" runat="server">Label 1</asp:Label> </th> <th ID="Th2" runat="server" style="white-space:nowrap; width: 150px" >

Unable to store combo box value to data grid view control

  
Hello,         I am using fw 3.5 SP1 with VS2008. I have bind my object collection with data grid view. I can see different values in combo box inside data grid view. But when I select any one value from combo box the selected value is changed to first value of combo box as soos as user leave the cell of the gird. Can anyone tell me where should I look for this problem so that my selected value remains same as user did select it.   Nilkanth Desai  

Controls Disappear in Custom Control Design View

  
I have a site using eight (so far) custom web user controls  and two of them have started misbehaving in design view.  When designing the control itself some (in one control) or all (in the other) regular controls (labels, text boxes, etc.) disappear from the design view surface.  They can still be seen in the source view and if the control is hosted on a regular .aspx page the control displays properly.  The code window recognizes all controls in the objects dropdown list and I can write appropriate code.  The controls run properly on their hosted pages.  If I switch to Split view and select controls in the source view panel a very small area od the design surface becomes selected (like one pixel for any of us who remember programming old DOS applications with 80-column screens) but no controls can be seen. In short, the controls work in every respect except that I cannot see all or part of the design surface in Design view when editing the controls directly.  I've double-tripple checked the source code for anything that may be causing this and just don't see anything.  (The controls aren't that complicated.)

Grid view control problem

  
HiI am using the grid view control where i am using <asp:CommandField for editing & deleting i want to visible false of this coloumn with edit & delete button..how do this.Thanks<asp:GridView DataKeyNames="StaffCalendarId"  PagerSettings-Mode="NumericFirstLast"                                                        PagerStyle-HorizontalAlign="Center" ShowHeader="true" AllowPaging="true" AutoGenerateColumns="False"                                                        Width="100%" ID="gvEventInfo" runat="server" CellPadding="4" ForeColor="#333333"                            &nbs

Problem in tab control with MVVM Pattern

  
Hi,  Am new to wpfpatter and mvvm also. I have problem, i need to assign the same shortcut key(say alt+N) to two button in different tab. i have used the following code to assign the shortcut. problem in when i click the shortcut key in tab one it will get trigger the tab two button event. --xmal code is     <UserControl.InputBindings>         <KeyBinding Command="{Binding Path=Delete1Command}" Modifiers="Alt" Key="N"></KeyBinding>         <KeyBinding Command="{Binding Path=Delete2Command}"   Modifiers="Alt" Key="N"></KeyBinding>     </UserControl.InputBindings>        <TabControl  Height="100" HorizontalAlignment="Left"  Name="tabControl1" VerticalAlignment="Top" Width="200">             <TabItem Header="tabItem1" Name="tabItem1">                 <Grid>                     <Button Content="Button1" Height="23&q

Designer View control hierarchy

  
I have been trying to figure this out for quite a while today... You know the little control hierarchy tool at the bottom of the "Design" and "Code" view of the Designer file? It's gone for some reason. I tried reverting from a Project to a Website too, and still didn't fix the problem. I can see the hierarchy in code view, but not the design view. It's probably some kind of silly option but I couldn't find anything online about anyone else having this problem. Also, when I click on a control in the design view, and I go to the Code view, it just puts me at the top of the page rather than highlighting the control's code and bringing me to it automatically. This is very frustrating, lol. 

How do I get the ordinal position of a control without knowing, and more importantly, not needing to

  
Hello, How do I get the ordinal position of a control without knowing, and more importantly, not needing to know it's parent type? For example, this XMAL: <Parent of unknown type>      <Control Name="Control_1" />      <Control Name="Control_2" />      <Control Name="Control_3" />      <Control Name="Control_4" /> </Parent of unknown type> How do I get "Control_3"s ordinal position within its parent control? I know that I can do this:     UIElement p = (UIElement)Control_3.Parent; or even:     FrameworkElement p = (FrameworkElement)Control_3.Parent; but neither of those allow:     int i = p.Children.IndexOf(Control_3); nor     int i = p.Items.IndexOf(Control_3); If the parent is a StackPanel, I can do:     StackPanel p = (StackPanel)Control_3.Parent; and then I can do:     int i = p.Children.IndexOf(Control_3); I really do not want to have to cast the parent to a specific type, that would be a pain since there several types that could have children or items. Regards, Robert

Binding ListView Control Using MVVM

  
In this short post I will show you how you can bind the list view control and get the selected value of the list view control using MVVM pattern. For this post I have added one list view control which hold the grid view control in it view and when item is selected in the grid view the selected item is shown at the end of the screen. In the Image 1the selected items are not shown ( only the label fields are shown) but in the Image 2 when user click on any of the item the detail is shown.
Categories: 
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend