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• Data confusion - Selecting data in one DataGridView based on selection in another

  - by Logan Young

  This probably isn't the best way to do what I want, but I can't think of anything else to try... NB: I'm using Visual Basic.NET My form has 2 DataGridView controls. One of these is bound to a DataSet, the other isn't visible - at least not until the user selects a uniqueidentifier cell in the 1st grid. When the user makes this selection, the 2nd grid will become visible and display the row from another with the same id as the one selected in the 1st grid. So, basically, I want to dynamically display data in one grid based on user selection in another grid. My code looks like this so far... Private Sub RulesGrid_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles RulesGrid.CellClick Try FlagsGrid.Visible = True ''// MsgBox(RulesGrid.CurrentCell.Value.ToString()) Dim sql As String = "SELECT * FROM ctblMKA_Status_Flags " + _ "WHERE intStatusID = '" & RulesGrid.CurrentCell.Value & "'" DSFlags = GetDS(sql) DSFlags.DataSetName = "FlagsDataSet" FlagsGrid.DataSource = DSFlags ProgressBar.Visible = False Catch ex As Exception MsgBox(ex.ToString) End Try End Sub I feel like I'm missing something here... Any ideas anyone?

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• Problem in calling a function from different class using protocols-iphone

  - by Muniraj

  I use cocos2d for my game. In which I play a movie and have a separate overlay view for controls.The touches are detected in the overlay view. Now when the touches are detected the function in the game code has to be invoked. But the function is not detected and there is no error. I dont know what has gone wrong. Someone please help me. The code are as follows The protocol part is @protocol Protocol @required -(void) transition1:(id) sender; @end The function which is to be invoked in the game code is (void) transition1:(id) sender { [[Director sharedDirector] replaceScene: [ [Scene node] addChild: [Layer4 node] z:0] ]; } The code in the overlay view in MovieOverlayViewController.h import "Protocol.h" @interface MovieOverlayViewController : UIViewController { UIImageView *overlay; NSObject <Protocol> *transfer; } @end The code in the overlay view in MovieOverlayViewController.m @implementation MovieOverlayViewController (id)init { if ((self = [super init])) self.view = [[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease]; return self; } -(void) viewWillAppear:(BOOL)animated { overlay = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"overlay.png"]] autorelease]; [self.view addSubview:overlay]; } (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint point = [touch locationInView:self.view]; NSLog(@"pointx: %f pointy:%f", point.x, point.y); if (CGRectContainsPoint(CGRectMake(1, 440, 106, 40), point)) { // the function is called here [transfer transition1: nil]; } else if (CGRectContainsPoint(CGRectMake(107, 440, 106, 40), point)) NSLog(@"tab 2 touched"); } (void)dealloc { [overlay release]; [super dealloc]; } @end

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• Filling a region draws it off canvas

  - by Xanyx

  Hi Using the following code in Delphi 2007: procedure TfrmTest.PaintBox1Paint(Sender: TObject); const Rect_Size = 10; begin PaintBox1.Canvas.Brush.Color := clYellow; PaintBox1.Canvas.FillRect(Rect(0, 0, PaintBox1.width, PaintBox1.height)); PaintBox1.Canvas.Brush.Color := clRed; DrawARect(PaintBox1.Canvas, 0, 0, Rect_Size, Rect_Size); end; procedure TfrmTest.DrawARect(ACanvas: TCanvas; iLeft, iTop, iWidth, iHeight: Integer); var rgnMain: HRGN; begin rgnMain := CreateRectRgn(iLeft, iTop, iLeft + iWidth, iTop + iHeight); try SelectClipRgn(ACanvas.handle, rgnMain); ACanvas.FillRect(ACanvas.ClipRect); SelectClipRgn(ACanvas.handle, 0); finally DeleteObject(rgnMain); end; end; I get this: (Yellow area shows boundaries of PaintBox1). HMMM, NOT ALLOWED TO POST IMAGE Please go to: http://www.freeimagehosting.net/uploads/62cf687d29.jpg (Linked image shows a form with a yellow box [PaintBox1] in the center. However my red rectange [rgnMain] has been drawn at pos 0,0 on the form) My expectation was that the red rectangle would be at the top left of the PaintBox1 canvas, not the form's canvas. Why is it not? Can regions only be used with controls that have a Windows handle? Thanks

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• Will WCF allow me to use object references across boundries on objects that implement INotifyPropert

  - by zimmer62

  So I've created a series of objects that interact with a piece of hardware over a serial port. There is a thread running monitoring the serial port, and if the state of the hardware changes it updates properties in my objects. I'm using observable collections, and INotifyPropertyChanged. I've built a UI in WPF and it works great, showing me real time updating when the hardware changes and allows me to send changes to the hardware as well by changing these properties using bindings. What I'm hoping is that I can run the UI on a different machine than what the hardware is hooked up to without a lot of wiring up of events. Possibly even allow multiple UI's to connect to the same service and interact with this hardware. So far I understand I'm going to need to create a WCF service. I'm trying to figure out if I'll be able to pass a reference to an object created at the service to the client leaving events intact. So that the UI will really just be bound to a remote object. Am I moving the right direction with WCF? Also I see tons of examples for WCF in C#, are there any good practical use examples in VB that might be along the lines of what I'm trying to do?

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• Windows Workflow Foundation 4.0 Designer Rehosting with Custom Activities

  - by Robert

  I have several WF 4.0 workflows that I have created for an application my company is developing. Some of these workflows are simple, and some are very complex (i.e. many steps, several different types of activities, custom activities). For many of these workflows, I have created several custom code activities to support some internal process types. The workflows work great and we have had very few problems when it comes to maintaining them within VS 2010. We now want to move that responsibility off to our business users, so I have created a WPF application to rehost the WF designer (according to the MS samples). My problem is that when I open one of the workflows that contains custom code activities, those activities are represented as red boxes with the error message of "Activity could not be loaded because of errors in XAML." I have done research and have found several posts that mention that this is usually a problem with namespacing and referencing. The rehosted designer is in a namespace similar to this: Company.Application.Workflow.Designer And the custom code activities are contained within a separate custom workflow library, which I have included as a reference in the designer project. The library's namespace is similar to this: Company.Application.Workflow.Data.Activities As I have mentioned, the library is set as a reference in the designer's project, and I see it being copied to the output when I build the project. I have also included the reference in the XAML of the main designed application. What am I missing?

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• Refactoring Rails 3 Routes

  - by Martin

  Hello, I have this in my routes: get '/boutique/new' => 'stores#new', :as => :new_store, :constraints => { :id => /[a-z0-9_-]/ } post '/boutique' => 'stores#create', :as => :create_store, :constraints => { :id => /[a-z0-9_-]/ } get '/:shortname' => 'stores#show', :as => :store, :constraints => { :id => /[a-z0-9_-]/ } get '/:shortname/edit' => 'stores#edit', :as => :edit_store, :constraints => { :id => /[a-z0-9_-]/ } put '/:shortname' => 'stores#update', :as => :update_store, :constraints => { :id => /[a-z0-9_-]/ } delete '/:shortname' => 'stores#delete', :as => :destroy_store, :constraints => { :id => /[a-z0-9_-]/ } Is there a cleaner way to do the same? It doesn't look any elegant and even less if I add some more controls/actions to it. Thank you.

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• first major web app

  - by vbNewbie

  I have created a web app version of my previous crawler app and the initial form has controls to allow the client to make selections and start a search 'job'. These searches 'jobs' will be run my different threads created individually and added to a list to keep track of. Now the idea is to have another web form that will display this list of 'jobs' and their current status and will allow the jobs to be cancelled or removed only from the server side. This second form contains a grid to display these jobs. Now I have no idea if I should create the threads in the initial form code or send all user input to my main class which runs the search and if so how do I pass the the thread list to the second form to have it displayed on the grid. Any ideas really appreciated. Dim count As Integer = 0 Dim numThread As Integer = 0 Dim jobStartTime As Date Dim thread = New Thread(AddressOf ResetFormControlValues) 'StartBlogDiscovery) jobStartTime = Date.Now thread.Name = "Job" & jobStartTime 'clientName Session("Job") = "Job" & jobStartTime 'clientName thread.start() thread.sleep(50000) If numThread >= 10 Then For Each thread In threadlist thread.Join() Next Else numThread = numThread + 1 SyncLock threadlist threadlist.Enqueue(thread) End SyncLock End If this is the code that is called when the user clicks the search button on the inital form. this is what I just thought might work on the second web form if i used the session method. Try If Not Page.IsPostBack Then If Not Session("Job") = Nothing Then Grid1.DataSource = Session("Job") Grid1.DataBind() End If End If Finally

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• How to focus a control in an MDIParent when all child windows have closed?

  - by Tim Gradwell

  I have a control in my parent mdi form which I wish to be given the focus if all mdi children have closed. I've tried hooking into the child form's FormClosed event and setting the focus from there but when I test it, my control is not left with focus when I close the mdi child. Can anyone tell me what I'm missing? In the sample below, "first focus" gets hit and does its job correctly (if I comment out the first focus line, my tree does not get focus on startup, so it must be doing its job, right?) Unfortunately, even though "second focus" gets hit, my tree does not end up with the focus when I close the child window. Sample using System; using System.Windows.Forms; namespace mdiFocus { class ParentForm : Form { public ParentForm() { IsMdiContainer = true; tree = new TreeView(); tree.Nodes.Add("SomeNode"); tree.Dock = DockStyle.Left; Controls.Add(tree); } protected override void OnShown(EventArgs e) { Form child = new Form(); child.MdiParent = this; child.Show(); child.FormClosed += new FormClosedEventHandler(child_FormClosed); tree.Focus(); // first focus works ok } void child_FormClosed(object sender, FormClosedEventArgs e) { tree.Focus(); // second focus doesn't seem to work, even though it is hit :( } TreeView tree; } static class Program { [STAThread] static void Main() { Application.Run(new ParentForm()); } } }

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• How to call windows form from native cpp

  - by Jenuel

  I have an existing project using c/c++ .NET. Currently I have been given a task to create a windows form from my existing code. So i have add new project windows form application in the existing c/c++ projects.form.h, form.cpp has been automatically created. Now I am having problem to call the window from my c files. Even i could not call the form.h file from my c program. Is there any solution for this problem. Listed here is the coding.... login.c int LoginMain(int id,int task) { LoginClear(); LoginEntry(id,task); dp_in = 1; Rep(); //I WOULD LIKE TO CALL THE FORM AT THIS STAGE Cashier(); dp_in = 0; Login(); return(0); } form.cpp [STAThreadAttribute] int main(array ^args) { // Enabling Windows XP visual effects before any controls are created Application::EnableVisualStyles(); Application::SetCompatibleTextRenderingDefault(false); // Create the main window and run it Application::Run(gcnew Form1()); return 0; }

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• WP7 help with menu effects

  - by MattMacdonald

  Kinda new to Silverlight and have some experience with WPF but I'm doing a project with a group for a class making a game for WP7. I am currently in charge of the menu system for the game and I had a few ideas for "flashy" menu transitions. I got some going for the main menu but I wanted to do something cool for the options submenu. Anyway my idea is to either fashion an expander or to have sort of a variation of a dialog box. But the way I envisioned it would be in either case the menu items blur but are still visible while the expanded menu is displayed or while the dialog is active. If I'm being confusing sorry :) but think of Windows 7 glass effect on the menu while other options are available. What I'm getting at is I want to give this a shot but I have no idea how I would go about doing something like this. Could anyone point me in the right direction or outline some key steps for me to build off? I tried finding something like this on Google but no such luck.

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• Dynamic control click event not firing properly

  - by Wil

  I'm creating a next/previous function for my repeater using pageddatasource. I added the link button control dynamically in my oninit using the following code. LinkButton lnkNext = new LinkButton(); lnkNext.Text = "Next"; lnkNext.Click += new EventHandler(NextPage); if (currentPage != objPagedDataSource.PageCount) { pnlMain.Controls.Add(lnkNext); } So in my initial page_load, the next link comes up fine. There are 5 pages in my objPagedDataSource. currentPage variable is 1. The "NextPage" event handler looks like this public void NextPage(object sender, EventArgs e) { if (HttpContext.Current.Request.Cookies["PageNum"] == null) { HttpCookie cookie = new HttpCookie("PageNum"); cookie.Value = "1"; } else { HttpCookie cookie = HttpContext.Current.Request.Cookies["PageNum"]; cookie.Value = (Convert.ToInt32(cookie.Value) + 1).ToString(); } this.BindRepeater(); } So I am incrementing the cookie I am using to track the page number and then rebinding the repeater. Here is the main issue. The first time I click Next, it works, it goes to Page 2 without any problems. When on Page 2, I click Next, it goes back to Page 1. Seems like the Next event is not wiring up properly. Not sure why, any ideas?

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• How do I force all Tree itemrenderers to refresh?

  - by Richard Haven

  I have item renderers in an mx.controls.Tree that I need to refresh on demand. I have code in the updateDisplayList that fires for only some of the visible nodes no matter what I do. I've tried triggering a change that they should all be listening for; I have tried clearing and resetting the dataProvider and the itemRenderer properties. private function forceCategoryTreeRefresh(event : Event = null) : void { trace("forceCategoryTreeRefresh"); var prevDataProvider : Object = CategoryTree.dataProvider; CategoryTree.dataProvider = null; CategoryTree.validateNow(); CategoryTree.dataProvider = prevDataProvider; var prevItemRenderer : IFactory = CategoryTree.itemRenderer; CategoryTree.itemRenderer = null; CategoryTree.itemRenderer = prevItemRenderer as IFactory; _categoriesChangeDispatcher.dispatchEvent(new Event(Event.CHANGE)); } The nodes refresh properly when I scroll them into view (e.g. the .data gets set), but I cannot force the ones that already exist to refresh or reset themselves. Any ideas?

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• Create Extension Method to Produce Open & Closing Tags like Html.BeginForm()

  - by DaveDev

  Hi Guys I wonder if it's possible to create an extension method which has functionality & behaviour similar to Html.BeginForm(), in that it would generate a complete Html tag, and I could specificy its contents inside <% { & } %> tags. For example, I could have a view like: <% using(Html.BeginDiv("divId")) %> <% { %> <!-- Form content goes here --> <% } %> This capability would be very useful in the context of the functionality I'm trying to produce with the example in this question This would give me the ability to create containers for the types that I'll be <% var myType = new MyType(123, 234); %> <% var tag = new TagBuilder("div"); %> <% using(Html.BeginDiv<MyType>(myType, tag) %> <% { %> <!-- controls used for the configuration of MyType --> <!-- represented in the context of a HTML element, e.g.: --> <div class="MyType" prop1="123" prop2="234"> <!-- add a select here --> <!-- add a radio control here --> <!-- whatever, it represents elements in the context of their type --> </div> <% } %> I realise this will produce invalid XHTML, but I think there could be other benefits that outweigh this, especially since this project doesn't require that the XHTML validate to the W3C standards. Thanks Dave

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• Rate my C# code (~300 SLOC) using GDI+/Backgroundworker

  - by sebastianlarsson

  Hi, I want to get some feedback on my code! Below is some background info. I am taking a pre-certification course in C# (Sweden, 15 ECTS). The focus of the course is theoretical and only limited practical work. I dont find the assignments very hard at all to tell you the truth, but since I only have very limited work experience as a developer (I have worked 15h/week at Ericsson since November) I think I would benefit from having the certificate (70-536 and more probably). I am currently reading Martin Fowler's "Refactoring: Improving the design of existing code" and I tried to apply his techniques to my latest lab in the course. I have been on the lookout for a website which have the idea of providing feedback on code, but so far I have yet to discover any. Please take a look on my code and tell me what you think. It is only roughly 300 lines of code divided into a couple of classes. GDI+, backgroundworker and user controls are what the lab is about. I reckon you may have to spend as little as a couple of minutes on looking on the solution. Link to solution: http://www.filefactory.com/file/b18h7d5/n/Lab4_Lab5_SebastianLarsson.zip Regards and thank you, Sebastian

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• Invalid Pointer Operation, advice requested with debugging

  - by Xanyx

  I appear to have created code that is trashing memory. Having never had such problems before, i am now settign an Invalid Pointer Operation. In the following the value of the const string sFilename gets trashed after my call to PromptForXYZPropertiesSettings. // Allow the user to quickly display the properties of XYZ without needing to display the full Editor function PromptForXYZProperties(const sFilename:string; var AXYZProperties: TXYZProperties): boolean; var PropEditor: TdlgEditor; begin PropEditor:= TdlgEditor.create(nil); try PropEditor.LoadFromFile(sFilename); Other Details: Delphi 2007, Windows 7 64 bit, but can reproduce when testing EXE on XP REMOVING CONST STOPS PROBLEM FROM EXHIBITING (but presumably the problem is thus just lurking) PropEditor.PromptForXYZPropertiesSettings creates and shows a form. If I disable the ShowModal call then the memory is not trashed. Even though i have REMOVED ALL CONTROLS AND CODE from the form So I would like some advice on how to debug the issue. I was thinking perhaps watching the memory pointer where the sFilename var exists to see where it gets trashed, but not sure how i would do that (obviously needs to be done within the app so is owned memory). Thanks

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• Theme-aware XAML resources in a WP7 project

  - by SandRock

  I'm making a Windows Phone 7 application and I'm a bit confused with dark/light themes. With a panorama, you very often set a background image. The issue is it's very hard to make a picture which is right for both dark and light themes. How are we supposed to proceed? Is there a way to force a dark/light theme for a panorama? This will avoid making theme-specific panorama background pictures. Then how do I do? I found xaml files in C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.0\Design. If this is a right way to proceed, how can I import them for my panorama? Or if there's no way (or if it's wrong) to force a dark/light theme: how to write conditional XAML to set correct resources? Now I have the following XAML which is fine with the dark theme: <ImageBrush x:Key="PageBackground" ImageSource="Resources/PageBackground.png" Stretch="None" /> <ImageBrush x:Key="PanoramaBackground" ImageSource="Resources/PanoramaBackground.png" Stretch="None" /> But when I use a light theme, black controls and black texts are hard to read with my dark background pictures. So I made different pictures that I can use this way: <ImageBrush x:Key="PageBackground" ImageSource="Resources/PageBackgroundLight.png" Stretch="None" /> <ImageBrush x:Key="PanoramaBackground" ImageSource="Resources/PanoramaBackgroundLight.png" Stretch="None" /> Now my issue is to make XAML conditionnal to declare the right thing depending on the current theme. I found no relevant way on the Internet. I would prefer not to use code or code-behind for that because I believe XAML is able to do this (I just don't know how).

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• Cocoa button won't display image

  - by A Mann

  Just started exploring Cocoa so pretty much a total noob. I've written a very simple game. Set it up in Interface Builder and got it working fine. It contains a number of buttons and I'm now trying to get the buttons to display images. To start with I'm trying to get an image displayed on just one of the buttons which is called tile0 . The image file (it's nothing but a green square at the moment, but I'm just trying to get that working before I attempt anything more exotic) is sitting in the same directory as the class file which controls the game. I have the following code sitting in my wakeFromNib method: NSString *myImageFileName = [[NSString alloc] init]; myImageFileName = @"greenImage.jpg"; NSImage *myImage = [[NSImage alloc] initByReferencingFile:myImageFileName]; [tile0 setImage: myImage]; Trouble is, the game runs fine, but the image isn't appearing on my button. Is there someone who could kindly tell me if I'm doing something obviously wrong? Many Thanks.

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• Actionscript Removing Display Objects

  - by Chunk1978

  i don't understand why none of my display objects are not being removed. when i press the button, i'm expecting a trace and removal of both shapes and the button, but nothing happens: import fl.controls.Button; var shape1:Shape = new Shape(); shape1.name = "Shape1"; shape1.graphics.lineStyle(4, 0x000000); shape1.graphics.beginFill(0x000055, 0.5); shape1.graphics.drawRoundRect(50, 50, 100, 75, 20, 30); shape1.graphics.endFill(); addChild(shape1); var shape2:Shape = new Shape(); shape2.name = "Shape2"; shape2.graphics.lineStyle(4, 0xFFFF99); shape2.graphics.beginFill(0x550000, 0.5); shape2.graphics.drawRoundRect(100, 75, 200, 175, 50, 10); shape2.graphics.endFill(); addChild(shape2); button1.addEventListener(MouseEvent.CLICK, pushButton); function pushButton(evt:MouseEvent):void { for(var amount:int = numChildren; amount == 0; amount--) { trace(amount); var disObj:DisplayObject = getChildAt(amount); trace("Removing " + disObj.name); removeChildAt(amount); } }

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• DIV inside TD to make it appear correctly

  - by Daniel Svensson

  Hi, I have a <table> generated from code-behind and now facing a problem. In one of the TD i need to have a DIV that is setup with JQuery so that when i click a link the DIV slideToggles. Now i need the TD belonging to that TR not to expand the TR. To solve this i have used an old trick that is to place the JQuery DIV inside another surrounding DIV with height 1px and make the TR not expanding with the heigth of the DIV that slides out. In IE the sliding DIV is partially under the table and in Firefox the DIV appears over the table but it's trasparent, the text from the data in the table shows thru. I have tried to alter the Z-index in various ways but it's no good. Anyone that has an idea or alternatively solution that has worked for them. HtmlGenericControl containerDiv = new HtmlGenericControl("div"); containerDiv.ID = "containerDiv"; containerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.Width, "100%"); containerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.Height, "1px"); containerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.ZIndex, "999"); HtmlGenericControl innerDiv = new HtmlGenericControl("div"); innerDiv.ID = System.Guid.NewGuid().ToString() + "_annualDiv"; inner.Style.Add(System.Web.UI.HtmlTextWriterStyle.Width, "100%"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.Height, "300px"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.ZIndex, "1000"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.BorderStyle, "solid"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.BorderColor, "Black"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.BorderWidth, "1px"); innerDiv.Style.Add(System.Web.UI.HtmlTextWriterStyle.BackgroundColor, "white"); innerDiv.InnerHtml = "Here is a list of links coming later"; conDiv.Controls.Add(innerDiv);

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• javascript not firing when asp.net user control loads

  - by Jawahar

  I am trying to fire a Javascript call when an ASP.net user control to an aspx page. The Web site allows users to add user controls to a page (similar to adding a widget etc to a page like google widgets). But when the control is added the javascript does not fire, only if the page is refreshed will it fire the javascript. IF the next time the website is accessd and the controlis still there the javascript fires too. Do I need to use the RegisterClientScript method to register the call (setAutoTimer()) on the control load or OnPreRender event. In the User control I have this at the start of the ascx file: <script language="javascript" type="text/javascript"> $(document).ready(function () { if ($("#alarmList").length) { setAutoTimer(); getData(); } }); function setAutoTimer() { setInterval(getData, 10000); } function getData() { $.ajax({ type: "POST", url: "Service.asmx/getListData data: "{'inverterid': '" + "1'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (msg) { AjaxSucceeded(msg); }, error: AjaxFailed }); } function AjaxSucceeded(result) { $("#alarmList").empty(); $("#alarmsListTemplate").tmpl(result.d) .appendTo("#alarmList"); } function AjaxFailed(result) { alert(result.status + ' ' + result.statusText); } </script>

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• iPhone: Same Rows Repeated in Each Section of Grouped UITableview

  - by Rank Beginner

  I have an app that is a list of tasks, like a to do list. The user configures the tasks and that goes to the SQLite db. The list is displayed in a tableview. The SQL table in question consists of a taskid int, groupname varchar, taskname varchar, lastcompleted datetime, nextdue datetime, weighting integer. I currently have it working by creating an array from each column in the SQL table. In the tableView:cellForRowAtIndexPath: method, I create the controls for each task by binding their values to the array for each column. I want to add configurable task groups that should display as the section titles. I got the task groups to display as the section headers. My problem is that all the task rows are repeated in each group under each header. How do I get the correct rows to show up only under the correct section? I'm really new to development period and took on a hobby of trying to teach myself how to develop iphone apps. So, pretty please, be a little more detailed than you normally would with a professional developer. :)

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• datagridviewcomboboxcolumn with datasource issue?

  - by Sarrrva

  i have some propblem in datagridviewcombobocolumn with custom datasource property in vb.net. when i add datasource it does not populate in datagridview combobox column it giving nothing.. any one please help me out from this problem... code comboboxcell: Public Overrides Sub InitializeEditingControl(ByVal rowIndex As Integer, ByVal initialFormattedValue As Object, ByVal dataGridViewCellStyle As DataGridViewCellStyle) ' Set the value of the editing control to the current cell value. MyBase.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle) Dim ctl As ComboEditingControl = CType(DataGridView.EditingControl, ComboEditingControl) ctl.DropDownStyle = ComboBoxStyle.DropDown ctl.AutoCompleteSource = AutoCompleteSource.ListItems ctl.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.Suggest If (Me.DataGridView.Rows(rowIndex).Cells(0).Value <> Nothing) Then Dim GetValueFromRowToUseForBuildingCombo As String = Me.DataGridView.Rows(rowIndex).Cells(0).Value.ToString() ctl.Items.Clear() Dim dt As New DataTable() Try dt = TryCast(DirectCast(Me.DataGridView.Columns(ColumnIndex), ComboColumn).DataSource, DataTable) Catch ex As Exception MsgBox("error") End Try If (dt Is Nothing) Then ctl.Items.Add("") Else Dim thing As DataRow For Each thing In dt.Rows ctl.Items.Add(thing(0).ToString) Next End If If Me.Value Is Nothing Then ctl.SelectedIndex = -1 Else ctl.SelectedItem = Me.Value End If ctl.EditingControlDataGridView = Me.DataGridView End If End Sub from code: Dim widgets As New WidgetDataHandler Dim obj = widgets.GetAllWigetTypes() Dim dt As New DataTable Dim ListofmyObjects As New List(Of widget_types)(obj) Dim objList As New cObjectToTable(Of widget_types)(ListofmyObjects) dt = objList.GetTable() Dim obj1 For Each obj1 In obj blPersons.Add(obj1) Next Dim col1 As New DataGridViewTextBoxColumn col1.DisplayIndex = 0 col1.DataPropertyName = "Id" col1.HeaderText = "Id" dgvi00.Columns.Add(col1) Dim col2 As New ComboColumn col2.DisplayIndex = 1 col2.SortMode = DataGridViewColumnSortMode.Automatic col2.HeaderText = "Name" col2.DataPropertyName = "Name" col2.ToolTipText = "Select something from my combo" Dim dst As New DataSet 'Dim dt1 As New DataTable 'dt1.Columns.Add(col2.HeaderText) 'For Each thing In dt.Rows ' MsgBox(thing(1).ToString) ' dt1.Rows.Add(thing(1).ToString) 'Next dst.Tables.Add(dt) col2.DataSource = dst.Tables(0) col2.DisplayMember = "Name" Me.dgvi00.Columns.AddRange(col2) dgvi00.DataSource = blPersons.BindingSource 'setup the bindings for the binding navigator Dim bn As New _365_Media_Library.BindingNavigatorWithFilter bn.Dock = DockStyle.Bottom bn.GripStyle = ToolStripGripStyle.Hidden Me.Controls.Add(bn) bn.BindingSource = blPersons.BindingSource note : its working good in standalone application regards and thanks sarva

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• RichTextBox text is not shown C#

  - by user271077

  using richtextbox control programatically i'm appending text to the richtextbox . richTextBox1.AppendText("hello"); somehow the text appears in the richTextBox1.Text but is not shown in the form. any idea of what might be the problem? (I checked the forecolor seems ok). Thanks in advance Edit: found the root cause (had by mistake the initializeComponent() twice. ) private void InitializeComponent() { this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.SuspendLayout(); // // richTextBox1 // this.richTextBox1.Location = new System.Drawing.Point(114, 104); this.richTextBox1.Name = "richTextBox1"; this.richTextBox1.Size = new System.Drawing.Size(100, 96); this.richTextBox1.TabIndex = 0; this.richTextBox1.Text = ""; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(284, 262); this.Controls.Add(this.richTextBox1); this.Name = "Form1"; this.Text = "Form1"; this.Load += new System.EventHandler(this.Form1_Load); this.ResumeLayout(false); } public Form1() { InitializeComponent(); InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { richTextBox1.AppendText("hello world"); }` but still curious about why did this cause this weird behavior?

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• XSL(like) declarative language as MVC view over strongtyped model?

  - by Martin Kool

  As a huge XSL fan, I am very happy to use xsl as the view in our proprietary MVC framework on ASP.NET. Objects in the model are serialized under the hood using .NET's xml serializer, and we use quite atomic xsl templates to declare how each object or property should transform. For example: <xsl:template match="/Article"> <html> <body> <div class="article"> <xsl:apply-templates /> </div> </body> </html> </xsl:template> <xsl:template match="Article/Title"> <h1> <xsl:apply-templates /> </h1> </xsl:template> <xsl:template match="@*|text()"> <xsl:copy /> </xsl:template> This mechanism allows us to quickly override default matching templates, like having a template matching on the last item in a list, or the selected one, etc. Also, xsl extension objects in .NET allow us just the bit of extra grip that we need. Common shared templates can be split up and included. However Even though I can ignore the verbosity downside of xsl (because Visual Studio schema intellisense + snippets really is slick, praise to the VS-team), the downside of not having intellisense over strongtyped objects in the model is really something that's bugging me. I've seen ASP.NET MVC + user controls in action and really starting to love it, but I wonder; Is there a way of getting some sort of intellisense over XML that we're iterating over, or do you know of a language that offers the freedom and declarativeness of XSL but has the strongtype/intellisense benefits of say webforms/usercontrols/asp.net.mvc-view? (I probably know the answer: "no", and I'll find myself using Phil Haack's utterly cool mvc shizzle soon...)

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• Conflict with @Html.LabelFor and W3C Validator?

  - by Tyler

  I have a model that I am using to present an index of a model from a database and have given a display name to some of the rows that may need spaces in them, (I.e. "weekstarting" in a db would be given a display name of "Week Starting"). So I set the display name for my model like this: [DisplayName("Week Starting")] public DateTime WeekStarting { get; set; } and then in the table headers for my table I use the following line of code to display the field name using its given display name: @Html.LabelFor(x => x.First().WeekStarting) The above all works fine. But I am using the W3C validator and it is giving me the following error for the example I have given: The for attribute of the label element must refer to a form control. Forgive me if it is obvious but what am I doing wrong here? I am not using a form I am simply displaying an index of items in a table. I have tried to look for an answer and saw someone suggest that the form controls being referred to need ids (even though I'm not using a form) but this would not be applicable in this instance because if I tried to set an id in the index it would be duplicated with each item in the index: foreach (var item in Model.Tbms) { <tr><td>@item.value</td><tr>.... would be repeated for each item, and also unsure where I would put the id in any case, the td? } Or is there a better way to label the field header, with my preferred display name in the first place? I guess I could just swap @Html.LabelFor... for Hard code field name but do I have to?

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