Prevent row change Datagridview

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  - 1
    - Big picture question about the deployment of Winforms exe's I work in a company with a large corporate intranet. Many of the servers are both SQL Server hosts and file servers. For reasons beyond my understanding (i.e. management), it has been proposed that a new Winforms application be deployed by putting it on the same server as the database server it uses. Presumably users would just set up mapping to that server via Windows Explorer and probably set up a shortcut icon on their desktop. (I really haven't given much thought to this sort of a problem, since much of my recent work as been in Webforms.) What would be the drawbacks of this approach, if any? Tag: Prevent row change Datagridview Tag: 111779
  - 2
    - how to raise user events in VS 2005 (COM) sub-Winform, handle in V I am trying to raise a user-defined Event in a VB.NET 2005 COM Class (sub)form and have my calling VB6 form handle it. Code samples follow. In the VS 2005 code two events are coded identically - when they are RAISEd in reaction to a Framework Event they WORK, but when they are RAISEd in response to by user action within the VB.NET 2005 Subform they do NOT: =================================== ' 1. Here are the Events, defined in the same fashion in the VS 2005 (sub)form =================================== #Region "User-Defined Variables" Public Event ExitOBRpayerDialog() Public Event NetworkAvailabilityChanged( _ ByVal IsAvailable As Boolean) =================================== ' 2. Here are the Event Handlers for the Subs that will Raise the Events ' to the calling VB6 form, both added in the VS 2005 (sub)form constructor =================================== #Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call AddHandler Me.FormClosing, AddressOf frmOBRpayer_FormClosing AddHandler My.Computer.Network.NetworkAvailabilityChanged, _ AddressOf My_NetworkAvailabilityChanged AddHandler btnCustom.Click, AddressOf btnCustom_Click End Sub =================================== 3. Here are the VS 2005 Subs that are supposed to Raise the Events. When the OS raises the My.Computer.Network.NetworkAvailabilityChanged event, both User Events are raised by the first Sub below. They BOTH fire and are handled properly by the VB6 calling form!!! When either of the other two Subs is executed it is because of a Form Event, i.e. a user clicking a button (Form Close in the 2nd sub and btnCustom in the second). In this case, NEITHER User Event that is RAISED gets back to the VB6 program and neither is handled!!! The VB6 code for both Events is similar also, but I include it further below for completeness anyhow. WHY oh WHY cannot I fire my User Events with a form button click? WHY does an Event raised by the OS work and a user action does not??? (BTW, the way the OS fires both events is when I pull the network cable out of my workstation). =================================== Public Sub My_NetworkAvailabilityChanged(ByVal sender As Object, _ ByVal e As _ Microsoft.VisualBasic.Devices.NetworkAvailableEventArgs) RaiseEvent ExitOBRpayerDialog() RaiseEvent NetworkAvailabilityChanged(e.IsNetworkAvailable) Application.DoEvents() End Sub ----------------------------------------------------------------------------- Public Sub frmOBRpayer_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Dim crCloseReason As Windows.Forms.CloseReason Dim ev As New Microsoft.VisualBasic.Devices.NetworkAvailableEventArgs(False) Try crCloseReason = CloseReason.UserClosing crCloseReason = e.CloseReason Select Case crCloseReason Case CloseReason.UserClosing PayerCode = "71LA" RaiseEvent ExitOBRpayerDialog() ' DOES NOT FIRE - why oh why? Application.DoEvents() Case Else PayerCode = "OOPS" If OBRMode Then RaiseEvent ExitOBRpayerDialog() ' DOES NOT FIRE - why oh why? Application.DoEvents() Else RaiseEvent ExitOBRpayerDialog() ' DOES NOT FIRE - why oh why? Application.DoEvents() End If End Select Catch ex As Exception If exceptionPolicy.HandleException(ex) Then Me.handle_Ignorable_Exception(ex) Finally Call My_NetworkAvailabilityChanged(Me, ev) ' DOES NOT FIRE even though the Sub is the one that RAISEs bothEvents! End Try End Sub ----------------------------------------------------------------------------- Public Sub btnCustom_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) ' Does a custom form operation. First removes any errors on the form, ' then restores the data at it looked before the last user Save. Dim ev As New Microsoft.VisualBasic.Devices.NetworkAvailableEventArgs(True) Try Call My_NetworkAvailabilityChanged(Me, ev) ' DOES NOT FIRE even though the Sub is the one that RAISEs bothEvents! Catch ex As Exception If exceptionPolicy.HandleException(ex) Then Me.handle_Ignorable_Exception(ex) End Try End Sub =================================== ' 4. Here is the VB6 calling form code for handling the two User-Defined Events =================================== Option Explicit Private WithEvents clsOBRPayer As frmOBRpayer ... Private Sub Form_Load() ' Instantiate the object defined above as "With Events" ' Note that this object is NEVER reset to 'Nothing'. Set clsOBRPayer = New frmOBRpayer ... ' Here is where the .NET (sub) form is actually run Public Sub cmdManipulatePayers_Click() Screen.MousePointer = vbHourglass With clsOBRPayer .Billing_Patient_ID = 902264244 .Admit_ID = 1 .Patient_First_Name = "Silly" .Patient_Last_Name = "Willy" .OBRMode = True .runForm End With Screen.MousePointer = vbDefault End Sub ----------------------------------------------------- ... ' Here are the Event Handlers for the two User-Defined events. BOTH are ' handled and ONLY handled when the OS fires the ' My.Computer.Network.NetworkAvailabilityChanged event ----------------------------------------------------- Private Sub clsOBRPayer_ExitOBRpayerDialog() ShowPayerCode End Sub Private Sub clsOBRPayer_NetworkAvailabilityChanged( _ ByVal IsAvailable As Boolean) ShowAvailable IsAvailable End Sub Private Sub ShowPayerCode() Dim intReturnCode As Integer intReturnCode = MsgBox("PayerCode: [" & _ clsOBRPayer.PayerCode & "], " & _ "Application_Startup_Path: [" & _ clsOBRPayer.Application_Startup_Path & "].") End Sub Private Sub ShowAvailable(IsAvailable As Boolean) MsgBox (IIf(IsAvailable, "Online", "Offline")) End Sub =================================== Help would be much appreciated! Warm regards, -- triunity Tag: Prevent row change Datagridview Tag: 111776
  - 3
    - Click-Once w/ parms not passing into app Problem: I've created a click-once deployed application that cannot receive paramters from the query string in the URL of the click once page. I've followed this to the letter: http://msdn2.microsoft.com/en-us/library/ms172242(VS.80).aspx My query string is always blank. Here's my actual URL: http://MyMachine/MyApplication/publish.htm?test=something The application starts up just fine, it's just that ApplicationDeployment.CurrentDeployment.ActivationUri.Query is always blank. Has anyone ever gotten this to work? Tag: Prevent row change Datagridview Tag: 111774
  - 4
    - Using the TextRenderer Class I've been working with the "TextRenderer" class. I'd like to get it to display text in a PictureBox and add an ellipsis if the box is too small for all of the text. I've created a form with a PictureBox (picTest1) that's too small for all of the text and this is the "Paint" event for the PictureBox: Private Sub picTest1_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) _ Handles picTest1.Paint Const MSSG As String = "This is the PictureBox text. " & _ "It is very long in order to test the wrapping and " & _ "ellipse functions of the TextRenderer class." TextRenderer.DrawText(e.Graphics, MSSG, _ Nothing, e.ClipRectangle, Nothing, _ TextFormatFlags.HorizontalCenter _ Or TextFormatFlags.Top _ Or TextFormatFlags.WordBreak _ Or TextFormatFlags.WordEllipsis) End Sub It works fine on a single line, but when I add the "WordBreak" flag, the ellipsis disappear. The documentation says you can't combine the "ExpandTabs" flag with one of the "Ellipsis" flags, but it doesn't say that this won't work with "WordBreak". Am I doing something wrong? Is there any other technique for rendering the text and adding an ellipsis if the PictureBox is too small? Tag: Prevent row change Datagridview Tag: 111772
  - 5
    - Cheking of entered symbols in current Treenode Hi there! In my Treeview Control I am trying to edit some of the nodes. For this purpose I am using mytree.beginedit(), so after this the node is ready for editing. But I need to avoid of entering some symbols during editing. So I need smth like KeyPress Event for current TreeNode to be fired to implement some symbol cheking. Could you advice me smth? Treeview property LabelEdit is set to True. Thanks in advance! Dmitriy. *** Sent via Developersdex http://www.developersdex.com *** Tag: Prevent row change Datagridview Tag: 111769
  - 6
    - grid of user controls Hi Looking for a bit of advice here. I'm building an application that needs to display a grid (days in a year or month along the top and people down the side) in which each cell is a user control. The number of rows and columns are both variable. I've contemplated and partially tried various ways to tackle this, e.g.: - DataGrid (need to define columns, styles? - not got that far) - DataGridView (ditto - better / easier than DataGrid?) - Adding controls to a scrollable panel (possible issues with running out of window handles with large grid) I did also try doing this by rendering a large bitmap - this ran fairly nicely when it worked but I kept getting OutOfMemory exceptions and I would have to sacrifice a lot of flexibility and interactivity. As you can see I have a few ideas and I was wondering if anyone out there had any suggestions, alternatives or hints on what best practice might be with this sort of thing? Thanks in advance Tag: Prevent row change Datagridview Tag: 111766
  - 7
    - Control.CheckForIllegalCrossThreadCalls Hi, What are the consequences of setting the Control.CheckForIllegalCrossThreadCalls to False on application that uses threading? Tag: Prevent row change Datagridview Tag: 111765
  - 8
    - Passing arguments to ClickOnce applications Hello, Is there a simple way for passing arguments to applications deployed with ClickOnce and having off-line capabilities. My app takes arguments if I start it with the whole path to it "c:\whole\path\myapp.exe /arg=123" but as I do not know where the application reside on the client PC's I don't know the whole path. Is there a way to do so by a system-variable as %the_path_to_your_app% or what so ever, or is there any work around. tnx a lot Jean Paul Tag: Prevent row change Datagridview Tag: 111764
  - 9
    - Custom Software Development iTechArt Group - Custom Software Development and Offshore outsourcing Company http://www.itechart.com/ Offshore custom software development company iTechArt - Web site and Content Management Solutions development, CMS consulting: Ektron, Drupal and DotNetNuke iTechArt Group provides high quality custom software development services and offshore software development. On December 2006, iTechArt Group became an authorized Microsoft Certified Partner. This means that our company has been recognized by Microsoft for our vast expertise and authorized to custom software development; provide IT service consulting and custom business solutions. Custom Software Development and Offshore outsourcing Company iTechArt has worked together since 2003 to design build and deliver .NET Web Content Management software solutions that help clients meet their strategic objectives. We are agile oriented development partner able to consistently deliver solid results. iTechArt software development team assemblies specialists in the development of custom software applications and offshore software outsourcing services. Working concepts of our company are based on proven approaches and international standards used for custom software development such as Capability Maturity Model Integration for Software Engineering (CMMI- SW). In the same breath we have our own standpoint on software development process management which is fully effective and comprehensible for our clients. iTechArt offers software development in the next main directions: 1. Custom Software Development (Offshore outsourcing for worldwide based software development companies.) 2. Software Development for Digital Signage (Media content development and remote displays / information kiosks Web-based software application management.) 3. Web Site Development (E-commerce solutions, CMS/DotNetNuke/Ektron/ Drupal, Web 2.0/PHP/MySQL/AJAX, Flash/Action script/Flex and many more.) 4. Offshore Development Center (Dedicated development team of software developers. Our offshore development centers operate as an extension to clients' existing software engineering business.) Contact iTechArt ( http://www.itechart.com/ )about custom software development, end-to-end software solutions, outsourcing software development, custom DotNetNuke module development, DotNetNuke consulting, dotnetnuke hosting, first class Java and .Net developers, software application design, software testing, Quality Assurance, functionality testing and defect analysis, performance and stress testing, usability testing, Microsoft Media Services and Adobe Media Flash Server solutions, digital signage solutions and custom development, Ektron CMS400.NET developers, CMS, .NET Web Content Management software solutions Web: http://www.itechart.com/ http://www.itechart.com/Pages/ProductsServices/HowWeWork.aspx http://www.itechart.com/Pages/ProductsServices/BusinessModels.aspx http://www.itechart.com/Pages/ProductsServices/CustomSoftwareDevelopment.aspx http://www.itechart.com/Pages/ProductsServices/DotNetNukeModuleDevelopment.aspx Tag: Prevent row change Datagridview Tag: 111763
  - 10
    - how to make list view multiline in winform? Hi All, I am developing an application for WM5.0 in C#. I need to show a form in which i want to show list of details. Now i want to show the form similar to the form which is shown for the contact detail in WM5.0 device. In which name and number of the person comes in the same row. Basically the question is how to maek the list view multiline. MEans every row sontains more than one line,like in the contacts and also when you click on the particular contact,it shows the details of the phone numbers. Please help to resolve this. Thanks Tag: Prevent row change Datagridview Tag: 111762
  - 11
    - Using The TextRender Class I've been working with the "TextRenderer" class. I'd like to get it to display text in a PictureBox and add an ellipsis if the box is too small for all of the text. I've created a form with a PictureBox (picTest1) that's too small for all of the text and this is the "Paint" event for the PictureBox: Private Sub picTest1_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) _ Handles picTest1.Paint Const MSSG As String = "This is the PictureBox text. " & _ "It is very long in order to test the wrapping and " & _ "ellipse functions of the TextRenderer class." TextRenderer.DrawText(e.Graphics, MSSG, _ Nothing, e.ClipRectangle, Nothing, _ TextFormatFlags.HorizontalCenter _ Or TextFormatFlags.Top _ Or TextFormatFlags.WordBreak _ Or TextFormatFlags.WordEllipsis) End Sub It works fine on a single line, but when I add the "WordBreak" flag, the ellipsis disappear. The documentation says you can't combine the "ExpandTabs" flag with one of the "Ellipsis" flags, but it doesn't say that this won't work with "WordBreak". Am I doing something wrong? Is there any other technique for rendering the text and adding an ellipsis if the PictureBox is too small? Tag: Prevent row change Datagridview Tag: 111755
  - 12
    - Reference Caller's Application Variables from DLL I want to be able to access some global variables (defined in a winforms "ApplicationEvents.vb") from a DLL. I assume I need to pass a reference to the application object to the DLL. If so, how would I define it in the DLL and how would I set it in the main app? Is there some other way to get a reference to the DLL instantiator's application object from inside the DLL? Thanks. Tag: Prevent row change Datagridview Tag: 111754
  - 13
    - Debugging a Windows Service Hi guys, I'm trying to do just this, debug a Windows Service. I tried some ways I found around the net but I wasn't able to get it to work. This I found at http://www.codeproject.com/dotnet/DebugWinServices.asp and seems like a nice approach, but when it talks about "<Your Service's Primary Method Here>" I don't know what to do... =/ Any help, will gonna be VERY welcome. //#if (!DEBUG) // System.ServiceProcess.ServiceBase[] ServicesToRun; // ServicesToRun = new ServiceBase[] { new Service1() }; // ServiceBase.Run(ServicesToRun); //#else // // Debug code: this allows the process to run as a non-service. // // It will kick off the service start point, but never kill it. // // Shut down the debugger to exit // Service1 service = new Service1(); // service.<Your Service's Primary Method Here>(); // // Put a breakpoint on the following line to always catch // // your service when it has finished its work // System.Threading.Thread.Sleep(System.Threading.Timeout.Infinite); //#endif Thanks, Charly. Tag: Prevent row change Datagridview Tag: 111753
  - 14
    - wierd grid problem - 2003 I have inherited an app, so I'm using the 2003 IDE... I'm trying to change the grid size, however, it doesn't matter whether it's 2,2 or 200, 200 or whether Snap to Grid is on or off It keeps the same grid size and snap to grid is always on. Anyone have a fix for this, or at least any ideas? Tag: Prevent row change Datagridview Tag: 111751
  - 15
    - finding files in adirectory hi, how to get the number of files in a directory...including the files in the subdirectories... is there any default method of Directory class.. please help out Tag: Prevent row change Datagridview Tag: 111749
  - 16
    - help on regex i want a reg exp for the below format.. 1.0.00.0000 i tried as follows \d\.\d\.\d{2}\.\d{4} but it's accepting -ves numbers also(-1.0.00.0000) I want only +ve numbers in my input..how do i check it? Tag: Prevent row change Datagridview Tag: 111748
  - 17
    - autoscaling of winforms hi, i'm a newbie to winforms.... i've designed few forms... but when the resolution is changed to lowest number.. i'm not able to see certain buttons on my form... how do i fix this issue... do i need to set any properties on the winforms or controls? please do help out.... Tag: Prevent row change Datagridview Tag: 111747
  - 18
    - Redirecting keys using ActiveX RDP control in C# Hi, I'm writing a simple Rdp client in C#. In the Remote Desktop connection provided with windows, we can configure to redirect the winkey, and other hot keys such as alt+tab under the Local Resource tab. But I've been unable to do the same in an AcvtiveX RDP Client. Reading on MSDN i thought the following will work - private void Form1_Load(object sender, EventArgs e) { userControl11.axMsRdpClient1.Server = "testserver";//put server here userControl11.axMsRdpClient1.Connect(); userControl11.axMsRdpClient1.AdvancedSettings2.EnableWindowsKey = 0; userControl11.axMsRdpClient1.AdvancedSettings2.HotKeyCtrlEsc = 0x23; } but it doesn't seem to work.So every time I hit the windows key, its the local computers windows menu that pops up. I want the remote computer's windows to do so. Same with the alt+tab and other escape sequences Anybody knows how to do this? Rahul *** Sent via Developersdex http://www.developersdex.com *** Tag: Prevent row change Datagridview Tag: 111743
  - 19
    - Usercontrol validating with messagebox and tabcontrol For a Windows forms application I use the following construction. I have a form with a TabControl. On each TabPage there is a custom user control. The custom user control gets some parameters from the form, to set the data of the user control. In the validating event of the custom user control I check or there are any changes made by the user. If so, a message box is shown with the question â??Save changes?â?? The validating event is fired on tab switch and form close, that is what I want. But the problem is, on tab switch the message box is shown, but after that the tabs donâ??t switch any more. Is there a way to achieve this goal, user controls that a self responsible for their data saving? Tag: Prevent row change Datagridview Tag: 111741
  - 20
    - MessageBox in the middel of the application form, not in the middle of the screen - .net 1.1 , VS 2003 Hello, I have the following problem, which seems to be simple, but I see no solution. If I have for example: MessageBox.Show(......) this messagebox is allways in the middle of the screen. But on a screen with 1920x1200 pixel this is not very good because the application is for exampel in the top right corner. Is there any way to have the messageBox in the middle of the parent form? Must run under .net 1.1 / VS2003. Thank you for any help. Rolf Welskes Tag: Prevent row change Datagridview Tag: 111738
  - 21
    - Problem with one touch deployment I can create a new project, add a button that displays a MessageBox and then publish it to the localhost. This works as expected. However, when I publish an existing application, I get no errors yet the publish location is empty! This existing project was once copied across from another machine but I have been publishing it to a file location with no problems, when I switch it to a URL, it doesn't work. The publish URL is http://localhost/test - note this works with a new project just not with the existing project. I have tried a filesystem path "c:\inetpub\wwwroot\test" and I get the same problem. Any help much appreciated... -- Best regards Mark Tag: Prevent row change Datagridview Tag: 111735
  - 22
    - autoscaling of winforms hi, i'm a newbie to winforms.... i've designed few forms... but when the resolution is changed to lowest number.. i'm not able to see certain buttons on my form... how do i fix this issue... do i need to set any properties on the winforms or controls? please do help out.... Tag: Prevent row change Datagridview Tag: 111732
  - 23
    - String Alignment problem Friends, My Problem is related to writing a text file from a database using .Net. in a particular string format. I have a dataset with a table, let suppose in this table there are three fields. - Code - Description - Amount At the time of writing a text file I use in a for loop - String.Format("{0,10}{1, 40} {2,-10}", DS.Table(0).Row(i) ("Code").ToString(), DS.Table(0).Row(i)("Description").ToString(), DS.Table(0).Row(i)("Amount").ToString()) But the problem is related to the alignment. Data comes like in following format: 01Code 01Desc 2000 02Code 02Desc 3000 03CodeABC 03Desc 4000 04xyz 04Desc 5000 I want Data comes in following proper alignment format. 01Code 01Desc 2000 02Code 02Desc 3000 03CodeABC 03Desc 4000 04xyz 04Desc 5000 So anybody knows the solutions of this problem, please and please reply imediately, its urgent. Rahul Tag: Prevent row change Datagridview Tag: 111727
  - 24
    - Problem with returning to XP with dual boot vista. I recently got Windos Vista, and I wanted to have it without losing windows XP, so I installed it on a seperate partition as a dual boot. Windows Vista works fine, but when I try to get back into Windows XP, I get a message saying the Hardware Ajustment Layer has been corrupted (HAL.DDL) I put in my Win XP disk to try to run recovery console, and it does not even detect that I have windows XP. All my user data is still on the C: drive, while vista is on F:, and it is locked from me being able to access it from Vista due to the password I put on XP. I even tried altering the access controlls. (cacls icacls), and I can not get to my data. Tag: Prevent row change Datagridview Tag: 111726
  - 25
    - Database backup from the application code ... Hi, The task I want to do is backing up the sql server 2000 database which my application connect to from a client machine and saving this backup on the server machine. Is it possible to do that ? and if yes what code can I write to accomplish this task ? Thank you. Tag: Prevent row change Datagridview Tag: 111725
- Next
  - 1
    - Need help in identifying a control I have seen controls like the PropertyGrid that have a label titled Properties and have a Pin and cCose button on the label. What control is used to create the label with a pin and close button? Bill Tag: Prevent row change Datagridview Tag: 111723
  - 2
    - preventing the label from getting focus? hi , I have a groupbox with labels and textboxes , just like a regular form. I've set the tabindex for each consecutive textbox to tabindex of the prior textbox +1. The labels have high indexes , but they still recieve focus after every textbox Is there any way to prevent this? Thanks Gideon Tag: Prevent row change Datagridview Tag: 111715
  - 3
    - From Console::WriteLine() to message box /* I am trying to use message box instead of Console::WriteLine() to upgrade my code from just using the console to using GUI. In the bottom 2 lines, #1 works, but I have hard time to make # 2 works. Can anybody give a hand here to make the information to be shown on the message box instead of being shown on the console. I am using visual C++ .NET 2003 Thanks */ #include "stdafx.h" #include <gcroot.h> #using <mscorlib.dll> using namespace System; using namespace System::Runtime::InteropServices; typedef void* HWND; [DllImportAttribute("User32.dll", CharSet=CharSet::Auto)] extern "C" int MessageBox(HWND hw, String* text, String* caption, unsigned int type); __gc class MClass { public: int val; MClass(int n) //costructor { val = n; } }; class UClass { public : gcroot<MClass*> mc; UClass(MClass* pmc) //constructor { mc = pmc; } int getValue() //get function { return mc->val; } }; int _tmain() { Console::WriteLine(S"Testing..."); //Create a managed object and assign 3 to it MClass* pm = new MClass (3); //Create an unmanaged object and assign the value of the manged object (pm) to it UClass uc(pm); Console::WriteLine(S"Value is {0}", __box(uc.getValue())); //<-------- This will work # 1 //MessageBox(0, uc.getValue(), S"Message Box...", 0 ); //<------- this will not work # 2 return 0; } Tag: Prevent row change Datagridview Tag: 111711
  - 4
    - TabPage Control OnClick Event I am trying to run code that binds a DataGridView control on a TabPage. I inserted the code in the TabPage_Click event, but when the tab is clicked, the event never fires. I understand it is necessary to set the StandardClick style to enabled. I can't seem to find a StandardClick style on the TabControl, but I used the following code in the Form_Load event. this.SetStyle(ControlStyles.StandardClick, true); this.UpdateStyles(); Still no click event... Am I doing something wrong? -- Regards, Fred Chateau http://hotelmotelnow.com Tag: Prevent row change Datagridview Tag: 111709
  - 5
    - host WindowsForm control in MFC Hi: We have a problem when host a Windowform control in MFC. The logic we used just as Chris Sells article: http://msdn.microsoft.com/msdnmag/issues/03/03/WindowsForms/#S4 Everything went good. The control hosted in a MFC dialog. After open/close the dialog for couple of times, then we have following error: Managed Debugging Assistant 'ReportAvOnComRelease' has detected a problem in 'v:\Barracuda\Console\Bin\Barracuda.exe'. Additional Information: An exception was caught but handled while releasing a COM interface pointer through Marshal.Release or Marshal.ReleaseComObject or implicitly after the corresponding RuntimeCallableWrapper was garbage collected. This is the result of a user refcount error or other problem with a COM object's Release. Make sure refcounts are managed properly. The COM interface pointer's original vtable pointer was 0x78307604. While these types of exceptions are caught by the CLR, they can still lead to corruption and data loss so if possible the issue causing the exception should be addressed If it happens in the debug, you click the Continue button for couple of times, it can recovered from the exception. Anyone have idea what is going on? Thanks in advance. Tag: Prevent row change Datagridview Tag: 111708
  - 6
    - Displaying new controls and threads. I have a .NET UI threading question. I know the general rule that UI contents can't be changed from another thread. Here's my specific situation. I built a DLL that contains a unified GUI layout for several projects we're working on. The layout is basically a Form with a TableLayoutPanel (1 row, 2 columns), call it myMainTableLayoutPanel. Col0 contains a TreeView that we'll use to display different steps that application takes. The TreeNodes for the tree are provided by the individual groups when they use the DLL. Col1 contains essentially a blank panel where each product group will plug their own content. As far as this main DLL is concerned, accessing the TreeView (giving it the contents, changing color/checkboxes of the nodes) and displaying "something" in the blank panel on Col1, all follow the delegate threading model (use delegates and Invoke() methods). Now we come to the individual groups that are writing what essentially is a plugin for the DLL. lets say I write a plugin that will display calculation of Pi in the blank panel of Col1. To do that, I have created a PiCalculationPane (name it piCalculatorPane) that has some label used to print out how many digits of Pi have been calculated so far. Basically, I am talking about dynamically changing the contents of the pane that is displayed in blank panel. The application that displays the blank panel runs in its own thread. How far do I have to follow the UI threading model? If I want to update the Pi calculation in the piCalculatorPane, do I just call piCalculatorPane.Invoke(delegate fcn) and within fcn update the data, or do I have to chain the Invoke call down to myMainTableLayoutPanel? Sorry for a long and winded question, Thanks, Andrei Tag: Prevent row change Datagridview Tag: 111704
  - 7
    - Seeing the selected node after TreeView expansion Hi there, I have a treeview withmany nodes within it, at many levels. I have writen a function which collapses the list at a certain node level and another function for expanding the list out fully. The problem is that after I expand the list, the end (bottom section) of the expanded list comes into view, resulting in the fact that sometimes the selected node is not visable after expansion. I wish to adjust the view so that the selected items appears at the top of the treeview's view (window). How would you solve this? Barry. Tag: Prevent row change Datagridview Tag: 111701
  - 8
    - NumericUpDown.Select(Int32, Int32) does not work - Bug? (.Net 2.0) I want to select the Text in a derived NumericUpDown control when the user enters the control by overriding OnEnter() and within this method calling this.Select(0, this.Text.Length). However, the behavior is not as I expected - nothing happens. Further more, Visual Studio does not offer the Text Property in its AutoCompletion, even though the Text property exists in the NumericUpDown Class. Does anybody have any ideas why this strange behavior occurs with the NumericUpDown control? Regards Stephan Tag: Prevent row change Datagridview Tag: 111700
  - 9
    - -Ann- File Explorer components for Vista Hi The component suite for full-featured shell exploring has been released. Comprehensive support of Vista GUI (Views, Icons) specifics is added. News is at: http://www.pisyslabs.com/TrueFolderExplorer.aspx -- Thanks - Jerry Tag: Prevent row change Datagridview Tag: 111699
  - 10
    - Data Binding in depth Hello, I'm moving from asp.net to windows forms programming and I have some difficulties in learning data binding.. (DatabindingSource, TableAdapter, etc etc) Can someone tell me about some free tutorial on this argument? thanks M.A. Tag: Prevent row change Datagridview Tag: 111697
  - 11
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Hi all,
How do I prevent row change in a Datagridview? Is there something like a
BeforeCurrentRowChanged with an eventarg that could prevent from changing
current row?

I'm using datagridview bind with a datatable.

(I think old ADO had an event that could achieve this!)

TIA,
DC

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Re: Prevent row change Datagridview by Larry

Larry
Wed Jun 06 13:05:09 CDT 2007

> Hi all,
> How do I prevent row change in a Datagridview? Is there something like a
> BeforeCurrentRowChanged with an eventarg that could prevent from changing
> current row?
>
> I'm using datagridview bind with a datatable.

Did you check these out:

DataGridView.CellValidating
DataGridView.RowValidating

Also see section 4.1 here (written by the "DataGridView" manager at MSFT):

http://www.windowsclient.net/Samples/Go%20To%20Market/DataGridView/DataGridView%20FAQ.doc

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Re: Prevent row change Datagridview by cjard

cjard
Thu Jun 07 09:27:05 CDT 2007

On Jun 6, 6:31 pm, "Dinis Correia" <dinis_...@hotmail.com> wrote:
> Hi all,
> How do I prevent row change in a Datagridview?

Make it read only.

> Is there something like a
> BeforeCurrentRowChanged with an eventarg that could prevent from changing
> current row?
Define "Changing the current row" - do you mean edit the row, or alter
which row is current?

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