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• Regular expression to remove all text except...

  - by Barryman9000

  There may be an easier way, and if there is I'm all for it. However - my ASP.NET page has a TON of controls on it, and I've given them all ID's that start with underscore. I copied all the markup into Notepad++ and I'm trying to find a regular expression that will find everything but the controls and replace it with whitespace. that way I'll have a text file that has all my control names which I'll probably throw into Excel and do some string manipulation to add ".Text = " etc. Any suggestions?

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• Can anyone telme whats wrong in this part of code

  - by Mobin

  string name = ((DateTimePicker)sender).Name.ToString(); name = name.Substring(0, name.Length - 1); name = name + "4"; TimeSpan duration = new TimeSpan(); duration = ((DateTimePicker)sender).Value - ((DateTimePicker)panel2.Controls[name]).Value; name = name.Substring(0, name.Length - 1); name = name + "6"; ((MaskedTextBox)panel2.Controls[name]).Text = duration.ToString(); on execution it gives me Object reference not set to instance of an object similar functionality is used on other places but can't find out what i have to reinitialize here :$

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• ASP.net SessionState Error in Design Mode

  - by stringo0

  I'm getting a weird error in the design view for a user creation page for 2 controls: Error Creating Control - wCreateUser Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. (There's some more) I've done both of these, but I'm still getting the error in design mode. The controls work fine when compiled, and on the live site - this is just in the Visual Web Developer 2010 Design view for the page. Any ideas as to how I can resolve this? Thanks!

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• Image surrounded by text in WPF

  - by niao

  Greetings, I have some control which display bunch of textblocks and image. I would like the image to be surrounded by text. I have already implemented some functionality by using FlowDocument and custom bindable run control. (These controls are included inside user control). When I generate lots of these controls in treeview, application goes into infinite loop. I asked on forums before about this problem and the answer was that it can be WPF issue. Howver when I removed bindable run from my user control, problem dissappeared. Now I am trying to implement other solution where image will be surrounded by text. Can someone please help me? EDIT: Generally i would like to achieve something like this

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• What adapter to use for ExpandableListView with non-TextView views?

  - by David

  I have an ExpandableListView in which I'd like to have controls other than TextView. Apparently, SimpleExandableListViewAdapter assumes all the controls are TextViews. A cast exception is generated if they are not. What is the recommended solution? Options I can think of include: - Use some other included adapter. But I can't tell if they all have the same assumption. - Create my own adapter. Is there a doc which describes the contract, ie the sequence of method calls an adapter will encounter? I expected the existing adapters to require the views to conform to some interface to allow any conforming view to be used, rather than hardcode to textview and limit where they can be used.

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• WinForm - WPF integration; Piece by Piece

  - by Refracted Paladin

  I have a medium sized WinForm App (1 Form that hosts 40 user controls) that we use in house. I want to migrate over to WPF but I cannot do a Mass ReRelease. My idea was, for now, to recreate the App 1 User Control at a time in WPF and have that hosted in the existing WinForm App. I would make them look nearly identical, at this point, so there would be no need for mass retraining. My question is more to the point of, has any one else tried this and how does the data portion work. I have recreated one of the WinForms User Controls as a WPF user Control. Do I need to publish that as a User Control Library? How, then, would I access the DAL for that UC? I use a Linq to Sql data layer.

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• lock users in SAP

  - by dino

  How to completely disable the lock users in SAP? What setting controls this (login / failed_user_auto_unlock)?

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• WPF runtime control creation

  - by xyz

  Is there any good tutorial for creating WPF controls entirely at runtime? Thanks

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• Physical aspx pages in MVC

  - by Xulfee

  If we want to use physical aspx pages in MVC for some reasons with server controls, is that possilbe to use them.

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• How to block the UI during asynchronous operations in WPF

  - by mcintyre321

  We have a WPF app (actually a VSTO WPF app). On certain controls there are multiple elements which, when clicked, load data from a web service and update the UI. Right now, we carry out these web requests synchronously, blocking the UI thread until the response comes back. This prevents the user clicking around the app while the data is loading, potentially putting it into an invalid state to handle the data when it is returned. Of course the app becomes unresponsive if the request takes a long time. Ideally, we'd like to have the cancel button active during this time, but nothing else. Is there a clever way of doing this, or will we have to switch the requests to execute asynchronously using backgroundworker and write something that disables all the controls apart from the cancel button while a request is in progress?

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• How do you write a consistent UI Automation for MS? MSAA & UI Automation don't seem to overlap.

  - by Greg

  Working on a general Automation tool, considering moving from Win32 Message hooks to .net UI Automation, however the feature set of UI Automation doesn't cover all we have in Win32 and still doesn't seem to support all the GUI on Windows. One such example is Windows Live Messenger. Windows Live messenger 2009 is still using the older DirectUIHwnd to draw the gui. This means that you can't use windows messages to send to the controls, because the controls don't have their own HWND. It also seems to defeat the new .net UI Automation framework though the documentation seems to make out as if it can be joined in the UI Automation and Microsoft Active Accessibility document. Looking at MS Accessibility pointed to Active Accessibility 2.0 SDK Tools which showed that MSAA can interact with the contents. Is there some trick to getting the older MSAA technology that UI Automation seems to be trying to replace to actually work with UI Automation? I'd rather not have multiple solutions trying to automate the same windows for windows unlike Windows Live Messenger where each of these techniques is valid and will work.

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• Should I use the Model-View-ViewModel (MVVM) pattern in Silverlight projects?

  - by Jon Galloway

  One challenge with Silverlight controls is that when properties are bound to code, they're no longer really editable in Blend. For example, if you've got a ListView that's populated from a data feed, there are no elements visible when you edit the control in Blend. I've heard that the MVVM pattern, originated by the WPF development community, can also help with keeping Silverlight controls "blendable". I'm still wrapping my head around it, but here are some explanations: http://www.nikhilk.net/Silverlight-ViewModel-Pattern.aspx http://mark-dot-net.blogspot.com/2008/11/model-view-view-model-mvvm-in.html http://www.ryankeeter.com/silverlight/silverlight-mvvm-pt-1-hello-world-style/ http://jonas.follesoe.no/YouCardRevisitedImplementingTheViewModelPattern.aspx One potential downside is that the pattern requires additional classes, although not necessarily more code (as shown by the second link above). Thoughts?

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• How to return focus from GridView or DataGrid to other control on the page

  - by Senthilkumar

  I Want to know how to focus to control after completing tab navigation for the grid view. I have certain controls in my page and GridView/DataGrid as last control, when I navigate (Tab key navigation) on my page. I can navigate from first control to GridView but when I finish all editable items in grid the tab control goes to browser address bar. I need this should focus to again first control on the page. My question is how can I do this? If it is an ordinary controls then I can use (on key down) attribute of the same.. here how can I get access to the last row's last column on the grid view.

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• How do I use master page container in partial view

  - by user200295

  I have several partial views with Javascript that I am trying to move to the bottom of the page. To do this I am trying to use a container in the master page Master Page - <asp:ContentPlaceHolder ID="Foot" runat="server"></asp:ContentPlaceHolder> Partial view(ascx) <asp:Content ID="header" ContentPlaceHolderID="head" runat="server"> ... </asp:Content> But I get this error Parser Error Message: Content controls have to be top-level controls in a content page or a nested master page that references a master page. So how do I ensure that the Javascript for the partial view is at the bottom of the page? Especially in cases where the html layout needs to be at the top of the page?

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• C#.NET How to access fields in user control dynamically?

  - by Conor H

  Hi, I'm making a settings screen at the moment that will have a radiobutton group which will determine what controls are displayed. The different settings are contained within a UserControl. I am dynamically creating this UserControl like so: panel = new btSettings(); this.Controls.Add(panel); panel.Location = new Point(15, 49); Just wondering how I can access the fields within this control and design time when the object will only be created during run time? Thanks.

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• MVVM-Light Loaded Evented Executing Twice

  - by user275561

  Let me show the code first, The Control <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Controls:MatrixGrid x:Name="matrixGrid"> <i:Interaction.Triggers> <i:EventTrigger EventName="Loaded"> <cmd:EventToCommand Command="{Binding MatrixLoaded}" CommandParameter="{Binding ElementName=matrixGrid}" /> </i:EventTrigger> </i:Interaction.Triggers> </Controls:MatrixGrid> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> In The ViewModel Class I have public RelayCommand<MatrixGrid> MatrixLoaded { get; private set; } In The Constructor of the View Model I have MatrixLoaded = new RelayCommand<MatrixGrid>(MatrixGridAction); Now When I put a Breakpoint on the Function MatrixGridAction, The breakpoint is hit twice. Am I doing something wrong or is this a bug?

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• How to set skin at runtime in Flex 4

  - by Ben

  Hi, I have a bunch of custom controls based on a SkinnableContainer. When adding the control at design time, I can specify a skin by using the skinClass attribute on the tag. I need to add some of these elements during runtime, and I can't figure out how to specify the skinClass for my controls. eg. var something:CustomThing = new CustomThing(); /* mistery code here to attach the skin ? */ addElement(something); How do I do this? Thanks!

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• Mouse Capture and Selection

  - by Tommy

  I have a control, that moves around alot of different controls inside of it in the form of a grid. So basically, none of the container control is shown at any point. But i do have capture of all the mousedown and mousemove events of the controls inside. What id like to do, is create an effect alot like the desktop of a windows computer, where you can drag, and every control that is inside of the mouse's drag will be thrown in a list, and when the mouse is released i can perform an action on all the selected items. Is this possible?

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• Dynamically display properties of a control

  - by Ram

  Hi, To access the properties of windows controls in multi threaded application, I have modified my code as specified here solution. Although for calling the "SetControlValueMethod" I also need to pass the type of control and its specific property as text. I am looking for more convenient approach for callingvoid SetControlValueMethod(Control controlType,string propertyName, object value) Can I have all controls as a enum as first parameter. can I have properties of the selected control appear for second parameter, I don't want to type property name there. Can I have them appearing like enum for selected control?

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• System.Timers.Timer leaking due to "direct delegate roots"

  - by alimbada

  Apologies for the rather verbose and long-winded post, but this problem's been perplexing me for a few weeks now so I'm posting as much information as I can in order to get this resolved quickly. We have a WPF UserControl which is being loaded by a 3rd party app. The 3rd party app is a presentation application which loads and unloads controls on a schedule defined by an XML file which is downloaded from a server. Our control, when it is loaded into the application makes a web request to a web service and uses the data from the response to display some information. We're using an MVVM architecture for the control. The entry point of the control is a method that is implementing an interface exposed by the main app and this is where the control's configuration is set up. This is also where I set the DataContext of our control to our MainViewModel. The MainViewModel has two other view models as properties and the main UserControl has two child controls. Depending on the data received from the web service, the main UserControl decides which child control to display, e.g. if there is a HTTP error or the data received is not valid, then display child control A, otherwise display child control B. As you'd expect, these two child controls bind two separate view models each of which is a property of MainViewModel. Now child control B (which is displayed when the data is valid) has a RefreshService property/field. RefreshService is an object that is responsible for updating the model in a number of ways and contains 4 System.Timers.Timers; a _modelRefreshTimer a _viewRefreshTimer a _pageSwitchTimer a _retryFeedRetrievalOnErrorTimer (this is only enabled when something goes wrong with retrieving data). I should mention at this point that there are two types of data; the first changes every minute, the second changes every few hours. The controls' configuration decides which type we are using/displaying. If data is of the first type then we update the model quite frequently (every 30 seconds) using the _modelRefreshTimer's events. If the data is of the second type then we update the model after a longer interval. However, the view still needs to be refreshed every 30 seconds as stale data needs to be removed from the view (hence the _viewRefreshTimer). The control also paginates the data so we can see more than we can fit on the display area. This works by breaking the data up into Lists and switching the CurrentPage (which is a List) property of the view model to the right List. This is done by handling the _pageSwitchTimer's Elapsed event. Now the problem My problem is that the control, when removed from the visual tree doesn't dispose of it's timers. This was first noticed when we started getting an unusually high number of requests on the web server end very soon after deploying this control and found that requests were being made at least once a second! We found that the timers were living on and not stopping hours after the control had been removed from view and that the more timers there were the more requests piled up at the web server. My first solution was to implement IDisposable for the RefreshService and do some clean up when the control's UnLoaded event was fired. Within the RefreshServices Dispose method I've set Enabled to false for all the timers, then used the Stop() method on all of them. I've then called Dispose() too and set them to null. None of this worked. After some reading around I found that event handlers may hold references to Timers and prevent them from being disposed and collected. After some more reading and researching I found that the best way around this was to use the Weak Event Pattern. Using this blog and this blog I've managed to work around the shortcomings in the Weak Event pattern. However, none of this solves the problem. Timers are still not being disabled or stopped (let alone disposed) and web requests are continuing to build up. Mem Profiler tells me that "This type has N instances that are directly rooted by a delegate. This can indicate the delegate has not been properly removed" (where N is the number of instances). As far as I can tell though, all listeners of the Elapsed event for the timers are being removed during the cleanup so I can't understand why the timers continue to run. Thanks for reading. Eagerly awaiting your suggestions/comments/solutions (if you got this far :-p)

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• Drag and drop + custom drawing in Android

  - by Rich

  I am working on something that needed custom drag-and-drop functionality, so I have been subclassing View, doing a bunch of math in response to touch events, and then rendering everything manually through code on the canvas in onDraw. Now, the more functionality I add, the more the code is growing out of control and I find myself writing a ton more code than I would expect to write in a high level environment like Android. Is this how it's done, or am I missing something? If I'm not doing anything fancy in the UI, the framework handles the majority of my interactions. Built-in controls handle the touches and drags, and my code is pretty much limited to business logic and data. Is there a way to leverage the power of some of the UI controls and things like animations while also doing some of it manually in the onDraw canvas? Is there an accepted standard of when to use one or the other (if indeed the two approaches can be mixed)?

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• Adding checkbox dynamically

  - by shiv09

  public Form1 f1 = new Form1(); int p = 150; int q = 100; public void add() { //CheckBox c = new CheckBox(); //c.Location = new Point(p, q); //c.Text = f1.sub[0]; //this.Controls.Add(c); CheckBox chkBox = new CheckBox(); chkBox.Location = new Point(p, q); chkBox.Text = "Checked"; chkBox.Checked = false; chkBox.CheckState = CheckState.Checked; chkBox.CheckedChanged += new EventHandler(chkBox_CheckedChanged);// this.Controls.Add(chkBox); chkBox.Text = f1.sub[1];//The problem is here...whatever value I supply to sub[] it gives the below mentioned error } Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Here sub[] is a list in form1 which has 5 values...

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• ASP MVC Library for comments

  - by Jack

  Is there any freeware library (controls) for ASP MVC implementing posting and displaying comments?

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• Asp.net Script manager conflicting with button

  - by DJPB

  Hi there. I'm working on an asp.net app and I have some controls that are created dinamically on the OnInit event. One of that controls is an asp button that has been working fine until now. When I add a ScriptManager to my page, that same button is unnable to postback. It's only working if a take the ScriptManager out. has anything like this ever appened to somebody else? Am I invalidating the page somehow? Tks ps: this is my scrip manager tag: <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnableScriptGlobalization="true" EnableScriptLocalization="true"> </asp:ScriptManager> //My Dynamic Button: Button button1 = new Button { ID = "button1", Text = "Ok" }; button1.Click += new EventHandler(Button1_Click);

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• How to build a Windows Forms email-aware text box?

  - by Patrick Linskey

  Hi, I'm building a C# client app that allows a user to communicate with one or more existing users in a system via an email-like metaphor. I'd like to present the user with a text entry box that auto-completes on known email addresses, and allows multiple delimiter-separated addresses to be entered. Ideally, I'd also like the email addresses to turn into structured controls once they've been entered and recognized. Basically, I'm modeling the UI interaction for adding users after Facebook's model. Are there any Windows Forms controls out there with the ability to do something like this? Is there any well-established terminology for a hybrid textbox / control list box (no, not a ComboBox) or something that I should be searching for? Thanks, -Patrick

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