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• InfoPath FormControl on STA worker thread

  - by Rob Ford

  I have a .NET class that exposes two public methods: one to create an InfoPath form and another to Export to one of the supported formats. I’m using the Microsoft FormControl to do this. It’s hosted by a Form that does not get displayed. I get called by a Winforms app, but on an MTA worker thread instead of the UI thread. So I create an STA thread and execute on that, which works exactly once and then results in this exception: System.InvalidOperationException was unhandled Message="Unable to get the window handle for the 'FormControl' control. Windowless ActiveX controls are not supported." Source="System.Windows.Forms" StackTrace: at System.Windows.Forms.AxHost.EnsureWindowPresent() at System.Windows.Forms.AxHost.InPlaceActivate() at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state) at System.Windows.Forms.AxHost.CreateHandle() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.AxHost.EndInit() at InfoPathCreateStaThreadTest.FormControlHost.InitializeComponent() in C:\Windows\Temp\InfoPathCreateStaThreadTest\InfoPathCreateStaThreadTest\FormControlHost.Designer.cs:line 65 After some experimenting, I started to suspect this is a message pumping problem. I then came across this, which makes me more strongly suspect so: http://blogs.msdn.com/cbrumme/archive/2004/02/02/66219.aspx I tried various methods of pumping messages with no luck. I should mention that the alternative of automating the InfoPath app is not viable unless I can figure out how to hide the app. Any help would be much appreciated.

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• How do I detect if both left and right buttons are pushed?

  - by Greg McGuffey

  I would like have three mouse actions over a control: left, right and BOTH. I've got the left and right and am currently using the middle button for the third, but am curious how I could use the left and right buttons being pressed together, for those situations where the user has a mouse without a middle button. This would be handled in the OnMouseDown method of a custom control. UPDATE After reviewing the suggested answers, I need to clarify that what I was attempting to do was to take action on the mouse click in the MouseDown event (actually OnMouseDown method of a control). Because it appears that .NET will always raise two MouseDown events when both the left and right buttons on the mouse are clicked (one for each button), I'm guessing the only way to do this would be either do some low level windows message management or to implement some sort of delayed execution of an action after MouseDown. In the end, it is just way simpler to use the middle mouse button. Now, if the action took place on MouseUp, then Gary's or nos's suggestions would work well. Any further insights on this problem would be appreciated. Thanks!

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• Migrate style from TabItem to TabHeader

  - by OffApps Cory

  Good day! I have a TabControl with TabItems that have been customized via a control template. This control template specifies a trigger whereby on mouseover, the content of tab header grows slightly. <ControlTemplate> <Storyboard x:Key="TabHeaderGrow"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TabName" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="1.1"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="TabName" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"> <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="1.1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> <ControlTemplate.Triggers> <EventTrigger RoutedEvent="Mouse.MouseEnter"> <BeginStoryboard Storyboard="{StaticResource TabHeaderGrow}"/> </EventTrigger> When I mouseover any of the tabs they work as expected, however the trigger also fires when I mouseover any of the elements in the tab body. I know that I need to migrate the control styling to a tabHeader controlTemplate, but I am unsure how to do that. I can't seem to do template binding for the content of the tabheader. Any help would be appreciated.

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• How do I DYNAMICALLY cast in C# and return for a property

  - by ken-forslund

  I've already read threads on the topic, but can't find a solution that fits. I'm working on a drop-down list that takes an enum and uses that to populate itself. i found a VB.NET one. During the porting process, I discovered that it uses DirectCast() to set the type as it returns the SelectedValue. See the original VB here: http://jeffhandley.com/archive/2008/01/27/enum-list-dropdown-control.aspx the gist is, the control has Type _enumType; //gets set when the datasource is set and is the type of the specific enum The SelectedValue property kind of looks like (remember, it doesn't work): public Enum SelectedValue //Shadows Property { get { // Get the value from the request to allow for disabled viewstate string RequestValue = this.Page.Request.Params[this.UniqueID]; return Enum.Parse(_enumType, RequestValue, true) as _enumType; } set { base.SelectedValue = value.ToString(); } } Now this touches on a core point that I think was missed in the other discussions. In darn near every example, folks argued that DirectCast wasn't needed, because in every example, they statically defined the type. That's not the case here. As the programmer of the control, I don't know the type. Therefore, I can't cast it. Additionally, the following examples of lines won't compile because c# casting doesn't accept a variable. Whereas VB's CType and DirectCast can accept Type T as a function parameter: return Enum.Parse(_enumType, RequestValue, true); or return Enum.Parse(_enumType, RequestValue, true) as _enumType; or return (_enumType)Enum.Parse(_enumType, RequestValue, true) ; or return Convert.ChangeType(Enum.Parse(_enumType, RequestValue, true), _enumType); or return CastTo<_enumType>(Enum.Parse(_enumType, RequestValue, true)); So, any ideas on a solution? What's the .NET 3.5 best way to resolve this?

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• Windows theme affecting ListView header

  - by LihO

  I've created new Windows Forms Application (C#) with one simple form containing ListView. Then I changed the View Property to Details and increased the size of the font used in this ListView and here's the result: This is how it looks on Windows XP with Windows Classic theme: and here's the result with Windows XP theme: Creating the same Windows Forms Application in Visual C++ instead of C# yields same result. EDIT : Thanks to Kamil Lach, we already know that Visual Styles is what makes the appearance of ListView change. This can be avoided either by removing Application.EnableVisualStyles() call or by changing the Application.VisualStyleState. Both of these solutions yield the following result: This looks fine, but this change affects the appearance of other controls which is not good. I'd like my ListView to be the only control that is not affected by Visual Styles. I've also found similar questions that try to deal with it: Can you turn off visual styles/theming for just a single windows control? How do I disable visual styles for just one control, and not its children? Unfortunately, none of mentioned solutions works. Any C# solution that would make the ListView header have the correct height would be appreciated.

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• ms-excel: bubble trouble - creating amazing looking charts [closed]

  - by every_answer_gets_a_point

  i am reading this article: http://www.juiceanalytics.com/writing/bubble-trouble/ i would like to make a chart that looks like this in excel. is vba a requirement? can anyone help me to start?

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• why PaintComponent event in Java happen everytime I use its Graphics Event?

  - by Pooya

  Consider this code: public class StateChartPanel extends JPanel { private LightContext LC; public StateChartPanel(LightContext lc){ LC=lc; } public void paintComponent( Graphics G ){ super.paintComponent( G ); LC.DrawStateChart((Graphics2D)G); } } StateChartPanel is a panel to draw something (a state chart). It sends its Graphics object to LC which use it to draw shapes but whenever it draws something the PaintComponent event of StateChartPanel happens again and it causes my application to hang.

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• C# ASP.NET Binding Controls via Generic Method

  - by OverTech

  I have a few web applications that I maintain and I find myself very often writing the same block of code over and over again to bind a GridView to a data source. I'm trying to create a Generic method to handle data binding but I'm having trouble getting it to work with Repeaters and DataLists. Here is the Generic method I have so far: public void BindControl<T>(T control, SqlCommand sql) where T : System.Web.UI.WebControls.BaseDataBoundControl { cmd = sql; cn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { control.DataSource = dr; control.DataBind(); } dr.Close(); cn.Close(); } That way I can just define my CommandText then make a call to "BindControls(myGridView, cmd)" instead of retyping this same basic block of code every time I need to bind a grid. The problem is, this doesn't work with Repeaters or DataLists. Each of these controls inherit their respective "DataSource" and "DataBind" methods from different classes. Someone on another forum suggested that I implement an interface, but I'm not sure how to make that work either. The GridView, Datalist and Repeater get their respective "DataBind" methods from BaseDataBoundControl, BaseDataList, and Repeater classes. How would I go about creating a single interface to tie them all together? Or am I better off just using 3 overloads for this method? Dave

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• Crystal Reports format diagramm series axis

  - by Laoneo

  I'm using Crystal Reports Basic from Visual Studio. Now I want to create a 3D-Block Diagram but the series axis has the text from my columns of the dataset. Here is how my chart preview looks like and here is how it is configured in the diagram assistant All the texts on the series axis should be formatted like Monday, Tuesday, etc. and not Sum of SimultaneousMissionsWeekDayTable.Monday, Sum of SimultaneousMissionsWeekDayTable.Tuesday. Somebody any clue......

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• Constraining to parent container with MouseDragElementBehavior

  - by anonymous

  Hi all, I just had a question regarding constraining a control's drag and drop movement to its parent canvas. I tried using the ConstrainToParentBounds property on the MouseDragElementBehavior, however, when this is used the drag must be done really slowly or the movement of the control is choppy or stops altogether. So I am attempting to implement my own boundary constraints. I seem to be running into difficulty though. I am still using the MouseDragElementBehavior but am attempting to supplement it by also handling mouseleftbuttondown, mousemove, mouseleftbuttonup events. I know that these are working (haven't been overridden by the MouseDragElementBehavior) as I have tested them using other methods. I will post my current code below: private void Control_MouseMove(object sender, MouseEventArgs e) { MyControl mc = (MyControl)sender; Canvas canvas = (Canvas)mc.parent; GeneralTransform ct = canvas.TransformToVisual(Application.Current.RootVisual as UIElement; Point canvas_offset = ct.Transform(new Point(0,0)); double canvasTop = canvas_offset.Y; double canvasLeft = canvas_offset.X; GeneralTransform gt = mc.TransformToVisual(Application.Current.RootVisual as UIElement); Point offset = gt.Transform(new Point(0,0)); double controlTop = offset.Y; double controlLeft = offset.X; if(isMouseCaptured) { if(controlTop < canvasTop) { mc.Opacity = 1; //to test if conditions are being met, seems to indicate ok mc.setValue(Canvas.TopProperty, canvasTop); } if(controlLeft < canvasLeft) { mc.Opacity = 1; mc.setValue(Canvas.TopProperty, canvasTop); } } } This is what my code looks like at the moment (I realize there is nothing there for right/bottom). I've tried a bunch of different things at this point and none of them seem to give the desired result; the control's movement is still not constrained to the canvas. Any help/pointers would be greatly appreciated. Thanks!

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• Are these jobs for developer or designers or for client itself?

  - by jitendra

  Spell checking grammar checking Descriptive alt text for big chart , graph images, technical images To write Table summary and caption Descriptive Link text Color Contrast checking Deciding in content what should be H2 ,H3, H4... and what should be <strong> or <span class="boldtext"> Meta Description and keywords for each pages Image compression To decide Filenames for images,PDf etc To decide Page's <title> for each page

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• looking for overview of readystate and browsers

  - by Matt

  I'm finding a lot of problems with trying to determine readyState between IE8, FF3, and Chrome. so far this is what I find: Chrome, FF do not fire an event for .onReadyStateChanged Chrome, FF support .onLoad IE8 supports .onReadyStateChanged, but does not support .onLoad IE8 has also returned loaded, and complete. Mostly it states loaded, but every now and then it spits out complete. Can anyone point me to a chart or overview of browsers and the way they handle readyStates?

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• How do I get a ComboBox SelectionChanged event to fire from a nested ListBoxItem?

  - by Stephen McCusker

  This is a rather complex problem that has me really confused right now. Any help would be greatly appreciated. The Setup: ListBox of Type A UserControls -ListBoxItem of Type A UserControl --ListBox of Type B UserControls ---ListBoxItem of Type B UserControl ----ListBox of Type C UserControls -----ListBoxItem of Type C UserControl (contains the ComboBox) In other words, the Type A control has a ListBox of Type B controls that has a ListBox of Type C controls. All of the controls are hierarchical in nature. Type A contains the data that's needed to load the Type B controls and the Type B contains the data that's needed to load the Type C controls. The Type C control has a standard ComboBox in it for changing the values of the present items. In addition to the above structure, I have drag and dropping tied to the PreviewMouseLeftButtonDown event on both the Type A and Type B UserControl levels to handle reordering/deleting/etc commands in the GUI. All of this is working as intended. The Problem: When I attempt to change the value in the ComboBox, the SelectionChanged event never fires on the Type C "level" unless I'm careful enough to click on the borders/spacing in between any Type A or B controls. This happens when my ComboBox popout menu overlaps on either a Type A or B control located below itself. The selection events for Type A or B are firing instead of the Type C events, so the ComboBox is never changing its value reliably. In the debugger, the code for handling the drag and drop is triggering on the next ListBoxItem that's located underneath the ComboBox. Thoughts: Is there a way I can make my ComboBox popup take prevalence over the items behind it while double-nested in a ListBox (ie, ignore anything behind it while it's open)? Is there some way to reroute the incorrectly firing SelectionChanged events down to the ComboBox that's supposed to be triggering them?

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• Binding problem in C# wpf

  - by Cinaird

  I have a problem whit binding in wpf i have a textbox where i can do some input, then i try to bind the textinput to a custom usercontrol. This work for the usercontrol within RowDetailsTemplate but not in the CellTemplate. For each object in the CellTemplate i get this error output: System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=ScaleTextBox'. BindingExpression:Path=Text; DataItem=null; target element is 'Chart' (Name=''); target property is 'MaxValue' (type 'Int32') My code looks like this: XAML <ToolBarTray ToolBarTray.IsLocked="True" DockPanel.Dock="Top" Height="25"> <ToolBar Name="ButtonBar" > <TextBox Height="23" Name="ScaleTextBox" Width="120" Text="400"/> </ToolBar> </ToolBarTray> <DataGrid ItemsSource="{Binding Path=Items}" AutoGenerateColumns="False" IsReadOnly="True" RowHeight="25" RowDetailsVisibilityMode="VisibleWhenSelected"> <DataGrid.RowDetailsTemplate> <DataTemplate> <StackPanel Orientation="Vertical" > <my:UserControl ItemsSource="{Binding Path=Samples}" MaxValue="{Binding ElementName=ScaleTextBox, Path=Text}"/>--> </StackPanel> </DataTemplate> </DataGrid.RowDetailsTemplate> <DataGrid.Columns> <DataGridTemplateColumn MinWidth="150" Header="Chart" > <DataGridTemplateColumn.CellTemplate> <DataTemplate> <my:UserControl ItemsSource="{Binding Path=Samples}" MaxValue="{Binding ElementName=ScaleTextBox, Path=Text}"/><!-- this is the problem --> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> </DataGrid> C# public static readonly DependencyProperty MaxValueProperty = DependencyProperty.Register("MaxValue", typeof(int), typeof(PingChart), new FrameworkPropertyMetadata(MaxValuePropertyChanged)); private static void MaxValuePropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e) { Console.WriteLine(e.NewValue); } What do i do wrong?

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• How can I prevent a textbox from taking focus on the postback when I have a calendar extender on it?

  - by Biff MaGriff

  Hello, I have repeater, inside this repeater is a user control. In my c# codebehind on my user control I dynamically add a textbox and assign a calendar extender to it. Similar to this. //custom control protected void Page_Load(object o, EventArgs e) { TextBox tb = new TextBox(); tb.ID = "myTextBox"; MaskedEditExtender meeDate = new MaskedEditExtender(); meeDate.ID = "meeDate"; meeDate.TargetControlID = this.UniqueID + "$" + tb.ID; meeDate.Mask = "99/99/9999"; meeDate.MaskType = MaskedEditType.Date; CalendarExtender ce = new CalendarExtender(); ce.ID = "ceCalendar"; ce.TargetControlID = this.UniqueID + "$" + tb.ID; this.Controls.Add(tbDate); this.Controls.Add(meeDate); this.Controls.Add(ce); } This works well, however after I postback the textbox takes focus and the calendar extender fires and it looks really.... dumb. How can I stop this?

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• google piechart shows up really small when its inside of a jquery ui tab

  - by oo

  i am using the google piechart but if i put the chart inside of a jquery ui tab it shows up very small. is there some css conflict here maybe. Has anyone been able to get google piechart working inside of a jquery ui tab where its not the first visible tab ?

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• IE 8 issue where window.close() is not occuring after winword.exe is fired to print a document

  - by Dave

  In my web application, a popup page is called using window.open javascript. There is a Print button on the page that has an onclick event that calls a printchecks() function. The code in the printchecks() function is function printchecks(){ window.print(); window.close(); } Issue is that the window.print brings up the printer dialog fine and then you select a printer. The page is actually then printed and is a reference to an rtf document that opens in winword.exe behind the scenes. For some reason in IE 8, the window.close() does not occur. This worked in IE 7. In both cases, WINWORD.EXE process appears to run in the background after the page is printed but in the case of IE 8, control is not give back to that popup page until the WINWORD.EXE process dies which takes a minute or so. I am thinking that becasue control is not being sent back to the page in IE 8, the page is not closed automatically. You can close the page after control is given back after the minute or so. This does happen in IE on both Windows XP and Windows 7. Any ideas if there is a setting in IE 8 or some other reason this may be occuring?

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• TFS: Choose which Team Project to add a solution too.

  - by Patricker

  I have a solution which I developed in VS2008 and which I am trying to add to Source Control (TFS 2010, though the issue happened in TFS 2008 as well). I have several TFS workspaces on my computer and I have access to several Team Projects. When I right click the solution in my Solution Explorer and choose the "Add Solution to Source Control" option I am never given an option of choosing which Workspace or which Team Project to add the existing solution too. VS2008 then proceeds to add it to the same team project every time. I have tried selecting an alternate workspace/team project in every window where I can see an option for it but it always adds it back to the same one. I even tried changing the name of my new workspace so that alphabetically it was the first thinking that it might be somehow related to that... no luck. I then tried goign to the Change Source Control window where you can add/remove bindings on a solution/project but that window also defaults to the same Team Project as trying to add the solution directly does... Any help would be greatly appreciated with this, maybe I'm just missing something?

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• WM_NOTIFY and superclass chaining issue in Win32

  - by DasMonkeyman

  For reference I'm using the window superclass method outlined in this article. The specific issue occurs if I want to handle WM_NOTIFY messages (i.e. for custom drawing) from the base control in the superclass I either need to reflect them back from the parent window or set my own window as the parent (passed inside CREATESTRUCT for WM_(NC)CREATE to the base class). This method works fine if I have a single superclass. If I superclass my superclass then I run into a problem. Now 3 WindowProcs are operating in the same HWND, and when I reflect WM_NOTIFY messages (or have them sent to myself from the parent trick above) they always go to the outermost (most derived) WindowProc. I have no way to tell if they're messages intended for the inner superclass (base messages are supposed to go to the first superclass) or messages intended for the outer superclass (messages from the inner superclass are intended for the outer superclass). These messages are indistinguishable because they all come from the same HWND with the same control ID. Is there any way to resolve this without creating a new window to encapsulate each level of inheritance? Sorry about the wall of text. It's a difficult concept to explain. Here's a diagram. single superclass: SuperA::WindowProc() - Base::WindowProc()---\ ^--------WM_NOTIFY(Base)--------/ superclass of a superclass: SuperB::WindowProc() - SuperA::WindowProc() - Base::WindowProc()---\ ^--------WM_NOTIFY(Base)--------+-----------------------/ ^--------WM_NOTIFY(A)-----------/ The WM_NOTIFY messages in the second case all come from the same HWND and control ID, so I cannot distinguish between the messages intended for SuperA (from Base) and messages intended for SuperB (from SuperA). Any ideas?

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• How to generate spectrum color palettes

  - by ddimitrov

  Is there an easy way to convert between color models in Java (RGB, HSV and Lab). Assuming RGB color model: How do I calculate black body spectrum color palette? I want to use it for a heatmap chart. How about single-wavelength spectrum? Edit: I found that the ColorSpace class can be used for conversions between RGB/CIE and many other color models.

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• Are these jobs for developer or designers or for client itself? for a web-site projects

  - by jitendra

  Spell checking grammar checking Descriptive alt text for big chart , graph images, technical images To write Table summary and caption Descriptive Link text Color Contrast checking Deciding in content what should be H2 ,H3, H4... and what should be <strong> or <span class="boldtext"> Meta Description and keywords for each pages Image compression To decide Filenames for images,PDf etc To decide Page's <title> for each page

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• Question about Client IDs

  - by George

  I have a user control that is emmitting javascript using the ClientId function. For example: Out &= "ValidatorHookupControlID(" & Quote & ddlMonth.ClientID & Quote & "), document.all(" & Quote & CustomValidator1.ClientID & Quote & "));" & vbCrLf It appears to me that the ClientID function DOES not return the ultimate ID that is sent to the browser. Instead, the ClientID function only appears to be aware of its current parent control, which in this case is a the User Control and so the ID that is returned is the ID "dtmPassportExpirationDate_ddlMonth" When in fact the usercontrol is included in a master page and the ultimate ID that is used is: "ctl00_phPageContent_dtmPassportExpirationDate_ddlMonth" I may be nuts, but that's what it appears to be doing. I expect that the ClientID function would return the ultimate ID used in the HTML. Am I missing something?

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• silverlight plugin is not working on server

  - by Samir

  Hello, i am using silverlight plugin 3.0 to display the chart.it is working fine on local pc but it is not working on server,it is not displaying any thing. i have checked the MIME type also in iis.its over there. please tell me whats the problem thanking you samir

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• How to retrieve checkboxlist values in the controller in asp.net mvc

  - by sukumar

  I am having a form in a view page that looks as below: <form runat="server" id="dcrsubmit"> <asp:CheckBoxList ID="CheckBoxList1" runat="server"> <asp:ListItem>test1</asp:ListItem> <asp:ListItem>test2</asp:ListItem> <asp:ListItem>test3</asp:ListItem> <asp:ListItem>test4</asp:ListItem> <asp:ListItem>test5</asp:ListItem> <asp:ListItem>test6</asp:ListItem> </asp:CheckBoxList> ....other controls </form> Now when the form is posted, I am trying to retrieve the values submitted in the controller as below: [AcceptVerbs(HttpVerbs.Post)] public ActionResult testmethod(FormCollection formValues) { string s = formvalues.get("CheckBoxList1"); . . /* other code */ . } The string value shows null when I submit the form by checking some checkboxes. Is this the way to retrieve the values or am I doing something wrong? And I cannot use html control because all other controls on the form are server controls and I am not sure if I can only make this control a html control. And I am not sure how can I bind the values to it?

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• Migrating from jQuery to Prototype

  - by Craig Gardner

  I'm starting to write code using Prototype coming from a jQuery background. Is there any chart that shows the prototype equivalent method to use in place of specific jQuery methods? More specifically, I'm looking for a $('#my-id').prepend('some stuff') equivalent in prototype?

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