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  • Issue with IDataErrorInfo with text box in Expander

    - by Amit
    I have one expander and which contain text box, text is validating through IDataErrorInfo, it is working fine when i enter wrong information, it popup with red rectangle. but issue arises when i tried to collase the expander, and red rectangle is still there. it stayed on Expander so please provide soem good solution....

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  • Where has XamlPad gone in .NET 4.0 / Windows SDK v7.1 / Visual Studio 2010?

    - by elck03
    I can't find XamlPad anywhere after I installed .NET 4.0 / Visual Studio 2010 and Windows 7 SDK - v7.1. I tried searching C:\Program Files\Microsoft SDKs\Windows\v7.1\bin and did a dir /s xamlpad.exe to see if the Windows Index service didn't get to that folder yet. And it's not under Start Menu - All Programs - Windows SDK v7.1 -- Tools. Where has it gone? Did MS deprecate it? Thanks

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  • Binding to static property

    - by Anthony Brien
    I'm having a hard time binding a simple static string property to a text box. Here's the class with the static property: public class VersionManager { private static string filterString; public static string FilterString { get { return filterString; } set { filterString = value; } } } In my xaml, I just want to bind this static property to a text box: <TextBox> <TextBox.Text> <Binding Source="{x:Static local:VersionManager.FilterString}"/> </TextBox.Text> </TextBox> Everything compiles, but at run time, I get the following exception: Cannot convert the value in attribute 'Source' to object of type 'System.Windows.Markup.StaticExtension'. Error at object 'System.Windows.Data.Binding' in markup file 'BurnDisk;component/selectversionpagefunction.xaml' Line 57 Position 29. Any idea what I'm doing wrong?

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  • Text viewing in a delimited space

    - by Maurizio Reginelli
    I need to visualize a text into a delimited space. If I add a simple TextBlock I have a problem: when the text is longer than the available space, it is cropped at the end. I tried to insert the TextBlock inside a Viewbox: this solution works for a text longer than the available space, but increase the size of the text when it is shorter. Is there a way to reduce the size of the text only when it is longer than the available space?

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  • 'System.Windows.Data.MultiBinding' is not a valid value for property 'Text'.

    - by chaiguy
    I'm trying to write a custom MarkupExtension that allows me to use my own mechanisms for defining a binding, however when I attempt to return a MultiBinding from my MarkupExtension I get the above exception. I have: <TextBlock Text="{my:CustomMarkup ...}" /> CustomMarkup returns a MultiBinding, but apparently Text doesn't like being set to a MultiBinding. How come it works when I say: <TextBlock> <TextBlock.Text> <MultiBinding ... /> </TextBlock.Text> </TextBlock> But it doesn't work the way I'm doing it?

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  • How to update a custom dependency property when the datasource list changes

    - by John
    Hi We have a user control with a custom dependency property (DP). The DP is bound to an ObservableCollection. When a new item is added to the collection programatically, the databinding does not update the target DP. Why? We think it's because, unfortunately, in our case the target is not a ListBox or ListView, but a Canvas. The DP, when changed or initialized, is supposed to draw a Shape (!) onto the Canvas, and the shape's position and size is bound to the collection item's two properties: WIDTH, LEFT. Ideally we don't want to clear the Canvas and redraw all items just becasue one has been added (or deleted). But how? So: How can the custom DP take care of drawing the shape for the new collection item? What callback do we need, at what point in time does this have to happen, and what specific MetaDataOptions might there? Also, are there any good resources out there concerning all these dependency property options. They are quite confusing. MSDN does not really help with what we're trying to do. Thanks!

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  • access list element from thread

    - by phm
    Hello I have a "List" in the main application and I am trying to access its elements from within a thread. I am getting this exception: {"The calling thread cannot access this object because a different thread owns it."} System.SystemException {System.InvalidOperationException} Thanks

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  • How to Access a Control present inside a DataTemplate

    - by Subhen
    Hi, I have Few TextBlock inside the Data template as follow: <DataTemplate> <StackPanel x:Name="stackPanelItems" Orientation="Horizontal"> <TextBlock x:Name="myTextBox" HorizontalAlignment="Center" VerticalAlignment="Top" FontSize="14" /> </StackPanel> </DataTemplate> Now we need to Make the myTextBox Collsapsed in some scenarios but dont want to use the loaded or click event and then access the control via sender. Can I used any other method or way? Thanks, Subhen

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  • CollectionViewSource & Selective Column Display

    - by Berryl
    By selective column display i mean the following: a control shows a listing of widgets (WidgetVm.DisplayName), with the default display name being in English (WidgetVm.EnglishName), but with the option to show the widget in French (WidgetVm.FrenchName). There also sorting and filtering available, which is why CollectionViewSource seems ideal. I know you can have multiple views over the same source but I haven't figured out how to do this yet. Is that the right approach to solving this? How? Cheers, Berryl

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  • How to make an invisible button to run a command

    - by Denis Mitropolskiy
    I have a form with TextBox and two Buttons. One button has IsDefault property set to true, and IsCancel set to true for other button. TextBox is CommandTarget for both buttons. When I'm pressing Enter or ESC keys on TextBox, it works as I'm pressing on corresponding button. I want to remove buttons from the form. They should not be visible, but the textbox should react on Enter or ESC as before. I cannot just set button's Visible property to collapsed - in this case they does not work at all. And I prefer to avoid of tracking keyboard events. Is it possible?

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  • Entity Framework - refresh objects from database

    - by Nebo
    I'm having trouble with refreshing objects in my database. I have an two PC's and two applications. On the first PC, there's an application which communicates with my database and adds some data to Measurements table. On my other PC, there's an application which retrives the latest Measurement under a timer, so it should retrive measurements added by the application on my first PC too. The problem is it doesn't. On my application start, it caches all the data from database and never get new data added. I use Refresh() method which works well when I change any of the cached data, but it doesn't refresh newly added data. Here is my method which should update the data: public static Entities myEntities = new Entities(); public static Measurement GetLastMeasurement(int conditionId) { myEntities.Refresh(RefreshMode.StoreWins, myEntities.Measurements); return (from measurement in myEntities.Measurements where measurement.ConditionId == conditionId select measurement).OrderByDescending(cd => cd.Timestamp).First(); } P.S. Applications have different connection strings in app.config (different accounts for the same DB).

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  • Access Elements inside a DataTemplate... How to for more than 1 DataTemplate?

    - by GaaTY
    I've got 2 DataTemplates defined for a Listbox Control. 1 Template is for the UnSelected State and the other one is for the Selected State(showing more detail than the UnSelected State). I followed the example here: http://blogs.msdn.com/b/wpfsdk/archive/2007/04/16/how-do-i-programmatically-interact-with-template-generated-elements-part-ii.aspx about how to access the Elements inside the DataTemplates from Code behind. I get it right, but it only finds and returns an element of the UnSelected DataTemplate. But when i search for an element in the Selected DataTemplate i get a NullReferenceException. What could i be doing wrong?

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  • Get rid of XAML Window from Taskbar

    - by griegs
    If I have a XAML window that I show with ShowDialog, is there a way to make it (not) appear in the taskbar? The problem is that I can set the window to be topmost but if that window opens another dialog and I set that also to be topmost, I can put the second behind the first by clicking in the taskbar. This tends to confuse users.

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  • Do you prefer a Grid of ContentControl elements?

    - by rasx
    Today I am led to say for the greatest level of flexibility using a Grid of ContentControl elements is the way to go. Are there any caveats coming for choosing this strategy? (Note that, of course, I am not referring to the DataGrid or the GridView of a ListView.)

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  • Regular Expression Help in .NET

    - by Matt H.
    I have a simple pattern I am trying to match, any characters captured between parenthesis at the end of an HTML paragraph. I am running into trouble any time there is additional parentheticals in that paragraph: i.e. If the input string is "..... (321)</p" i want to get the value (321) However, if the paragraph has this text: "... (123) (321)</p" my regex is returning "(123) (321)" (everything between the opening "(" and closing ")" I am using the regex pattern "\s(.+)</p" How can I grab the correct value (using VB.NET) This is what I'm doing so far: Dim reg As New Regex("\s\(.+\)</P>", RegexOptions.IgnoreCase) Dim matchC As MatchCollection = reg.Matches(su.Question) If matchC.Count > 0 Then Dim lastMatch As Match = matchC(matchC.Count - 1) Dim DesiredValue As String = lastMatch.Value End If

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  • Set binding for DataTemplate components in code

    - by Chouppy
    Hi; sorry if I'm not clear, it's not really clear in my head too (especially after trying to find my way in other posts :p) What I'm willing to do is creating DataGrids in code, with zero to numerous columns containing a button, which will call one same function but with a "parameter" (different for each column). Here is what I got so far : DataGrid created in code DataTemplate defined in the xaml resources (with a button) DataGridTemplateColumn which uses the above DataTemplate Is it possible to bind the button's properties (in the DataTemplate), to the DataGridTemplateColumn properties (in my case, the column header would be ok), and how? Is there a way to get an access to the DataTemplate components (the button for example) in code, and modify their properties? Is it possible (and not hazardous) to create a DataTemplate in code? I declared mine in xaml because I found a post advising to do so instead of code. Thanks for your help.

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  • Conditional XAML

    - by Nicholas
    For easy of development I'm using a ViewBox to wrap all content inside a Window. This is because my development machine has a smaller screen than the deployment machine so using a ViewBox allows for better realisation of proportion. Obviously there is no reason for it to be there on Release versions of the code. Is there an easy method to conditionally include/exclude that 'wrapping' ViewBox in XAML? E.g. <Window> <Viewbox> <UserControl /*Content*/> </Viewbox> </Window>

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  • Buttons in the corners?

    - by Rick Ratayczak
    I'd like to have 4 buttons one in each corner of a window. But I want the stuff in the grid/window to be "behind" the buttons, as if they float on top. In html you would use the zOrder and absolute positioning. <Grid x:Name="ButtonRoot"> <Button Name="bTopLeft" VerticalAlignment="Top" HorizontalAlignment="Left" /> <Button Name="bTopRight" VerticalAlignment="Top" HorizontalAlignment="Right" /> <Button Name="bBottomLeft" VerticalAlignment="Bottom" HorizontalAlignment="Left" /> <Button Name="bBottomRight" VerticalAlignment="Bottom" HorizontalAlignment="Right" /> <!-- Other junk here --> </Grid> The problem is, the buttons will not be "over" things, as the things will "wrap" around the buttons. How do I achieve this effect?

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  • Why does this IF statement fail?

    - by ChosenOne
    If variable path is empty, and editor.Text is not empty, the SaveFileDialog should be displayed. Now, why on earth is this damn thing failing??? I have tried this with many different variations of code with the same result: FAIL: if(path.Length >= 1) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } At the top of code file I have: path = String.Empty; So why the heck it this failing every single time, even after trying all of the below variations? if(path.Length > 1) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } and if(String.IsNullOrEmpty(path)) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } and if(String.IsNullOrWhiteSpace(path)) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } This is making me very angry. How could this fail? Setting a break point reveals that path is definitely null/"".

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  • How to set the RelativeSource in a DataTemplate that is nested in a HierarchicalDataTemplate?

    - by Dabblernl
    I have the following XAML, that does all that it is supposed to, except that the MultiBinding on the FontSize fails on retrieving the Users. As you can see Users is an IEnumerable<UserData> that is part of the HierarchicalDataTemplate's DataContext. How do I reference it?? <TreeView Name="AllGroups" ItemsSource="{Binding}" > <TreeView.Resources> <HierarchicalDataTemplate DataType="{x:Type PrivateMessengerUI:GroupContainer}" ItemsSource="{Binding Users}" > <Label Content="{Binding GroupName}"/> </HierarchicalDataTemplate> <DataTemplate DataType="{x:Type PrivateMessenger:UserData}"> <TextBlock Text="{Binding Username}" ToolTip="{StaticResource UserDataGroupBox}" Name="GroupedUser" MouseDown="GroupedUser_MouseDown"> <TextBlock.FontSize> <MultiBinding Converter="{StaticResource LargeWhenIAmSelected}"> <Binding ElementName="Root" Path="SelectedUser"/> <Binding RelativeSource="???" Path="DataContext.Users"/> </MultiBinding> </TextBlock.FontSize> </TextBlock> </DataTemplate> </TreeView.Resources> </TreeView>

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