ParkingWindow revisited

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ Winforms
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - Issue with Data bound Text box validation I have a C# Windows forms application which uses XSD file created in memory dataset. On one of the forms I have bunch of text boxes to enter values for various columns of a table and they all are data bound. For one of text boxes value entered must be unique and I want to check this uniqueness as soon as user leaves corresponding text box after entering any value. I have tried following two methods and none seems to be working 1. If I try to attach a UniqueConstraint on corresponding column then it will not get fired until acceptchanges is not called and thus I cannot validate value as soon as user leaves field. 2. If I try to get a DataView with a rowfilter based upon value entered by user then it does not looks into rows which have â??modifiedâ?? or â??addedâ?? row state. I have tried to use all possible combination of DataViewRowState enumeration values but nothing seems to be able to force returned DataView to include modified or added status rows. Thus I get duplicate values in table So I have two questions â?? 1. Is it possible to enforce UniqueConstraint before AcceptChanges is called on Row / Table (may be in column changing event itself)? 2. What can cause an DataView to skip â??modifiedâ?? or â??addedâ?? row state rows even if DataViewRowState. CurrentRows has been specified for RowViewState of DataView? My apologies for possibly a vague explanation of my problem and thanks in advance for any thoughts. KT --- Posted using Wimdows.net NntpNews Component - Post Made from http://www.DotNetJunkies.com/newsgroups Our newsgroup engine supports Post Alerts, Ratings, and Searching. Tag: ParkingWindow revisited Tag: 73673
  - 2
    - Smart client template solution ??? HI! I am currently at the beginning of a new project and I would like to start with something out of the box. As we started our Web project we used IBuySpy Portal and it worked fine because we did not waste our time on authentification, authorisation and all that but we were able to start right wit the logic of the application. Is there something like that for SmartClient? I mean template solution containing the newest application blocks of Microsoft? Any comments or help will be highly appreciated. gicio Tag: ParkingWindow revisited Tag: 73671
  - 3
    - Change Cell Style Hi! I want to change the cell style of a datagrid. I only want to change the cell (5,5) and set the forecolor RED. How can I do?? Thx. Tag: ParkingWindow revisited Tag: 73669
  - 4
    - Custom TabContrl and TabStrip Problem Hi, I have a prolem please see if u can suggest something. I am developing a TabControl derived from Control. It consists of other control called TabStrip which is also derived frm control. My TabControl can be aligned vertically or horizontally. When it is horizontal i am docking TabStrip at the Top of the TabControl. When the alignment is changed am docking it at the Right so that it becomes Vertical. When am setting the Alignment of the TabControl to Vertical, the tabstrip is docked to the right inside the TabControl so that the tabs are shown vertically. Now when i am using my TabControl it is working fine in designer mode, when am toggleing between horizontal and vertical. But when i run the application the tabStrip's ( even though it is docked at the Right) location becomes (0,0) and it is show to the Left. Don't know why it's location becomes (0,0) whe i run the applicatiion.??? And whern i click on the Tab then it goes to the Right. However, when in Design mode it shows very well to the Right. --Nilesh Tag: ParkingWindow revisited Tag: 73667
  - 5
    - Custom TabControl using TabStrip and Dock probelm I am developing a TabControl derived from Control. It consists of other control called TabStrip which is also derived frm control. My TabControl can be aligned vertically or horizontally. When it is horizontal i am docking TabStrip at the Top of the TabControl. When the alignment is changed am docking it at the Right so that it becomes Vertical. When am setting the Alignment of the TabControl to Vertical, the tabstrip is docked to the right inside the TabControl so that the tabs are shown vertically. Now when i am using my TabControl it is working fine in designer mode, when am toggleing between horizontal and vertical. But when i run the application the tabStrip's ( even though it is docked at the Right) location becomes (0,0) and it is show to the Left. Don't know why it's location becomes (0,0) whe i run the applicatiion.??? And whern i click on the Tab then it goes to the Right. However, when in Design mode it shows very well to the Right. Any one can please help me suggest what's going wrong here?? --Nilesh Tag: ParkingWindow revisited Tag: 73666
  - 6
    - Cuatom TabControl using TabStrip and Docking Problem I am developing a TabControl derived from Control. It consists of other control called TabStrip which is also derived frm control. My TabControl can be aligned vertically or horizontally. When it is horizontal i am docking TabStrip at the Top of the TabControl. When the alignment is changed am docking it at the Right so that it becomes Vertical. When am setting the Alignment of the TabControl to Vertical, the tabstrip is docked to the right inside the TabControl so that the tabs are shown vertically. Now when i am using my TabControl it is working fine in designer mode, when am toggleing between horizontal and vertical. But when i run the application the tabStrip's ( even though it is docked at the Right) location becomes (0,0) and it is show to the Left. Don't know why it's location becomes (0,0) whe i run the applicatiion.??? And whern i click on the Tab then it goes to the Right. However, when in Design mode it shows very well to the Right. Any one can please help me suggest what's going wrong here?? --Nilesh Tag: ParkingWindow revisited Tag: 73665
  - 7
    - TabStrip TabControl and Docking Problem... I am developing a TabControl derived from Control. It consists of other control called TabStrip which is also derived frm control. My TabControl can be aligned vertically or horizontally. When it is horizontal i am docking TabStrip at the Top of the TabControl. When the alignment is changed am docking it at the Right so that it becomes Vertical. When am setting the Alignment of the TabControl to Vertical, the tabstrip is docked to the right inside the TabControl so that the tabs are shown vertically. Now when i am using my TabControl it is working fine in designer mode, when am toggleing between horizontal and vertical. But when i run the application the tabStrip's ( even though it is docked at the Right) location becomes (0,0) and it is show to the Left. Don't know why it's location becomes (0,0) whe i run the applicatiion.??? And whern i click on the Tab then it goes to the Right. However, when in Design mode it shows very well to the Right. Any one can please help me suggest what's going wrong here?? --Nilesh Tag: ParkingWindow revisited Tag: 73664
  - 8
    - Docking and Custom TabControl Problem... I am developing a TabControl derived from Control. It consists of other control called TabStrip which is also derived frm control. My TabControl can be aligned vertically or horizontally. When it is horizontal i am docking TabStrip at the Top of the TabControl. When the alignment is changed am docking it at the Right so that it becomes Vertical. When am setting the Alignment of the TabControl to Vertical, the tabstrip is docked to the right inside the TabControl so that the tabs are shown vertically. Now when i am using my TabControl it is working fine in designer mode, when am toggleing between horizontal and vertical. But when i run the application the tabStrip's ( even though it is docked at the Right) location becomes (0,0) and it is show to the Left. Don't know why it's location becomes (0,0) whe i run the applicatiion.??? And whern i click on the Tab then it goes to the Right. However, when in Design mode it shows very well to the Right. Any one can please help me suggest what's going wrong here?? --Nilesh Tag: ParkingWindow revisited Tag: 73663
  - 9
    - NullReferenceException in UnsafeNativeMethods.CreateWindowEx Hi all, I have the following situation. I create AppDomains on demand to host winform based controls from C++ host. I'm using .NET 1.1. I tried to do AppDomain.Unload from background thread to free up the main GUI thread and make it more responsive. When I try this, I get the exception, listed below, always on the 3rd AppDomain and control creation. I tried getting SystemEvents through reflection and calling Shutdown manually. This delays the problem. It almost doesn't happen, but still re-appears sometimes. This doesn't reproduce in .NET 2.0 alpha. Is there any way I can work around this bug/limitation? I also would like to know what is being null inside the UnsafeNativeMethods.CreateWindowEx or under what conditions. Maybe I can work around the problem. Thank you in advance for any help on this Exception trace: ------------------ System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: The type initializer for "System.Drawing.SafeNativeMethods" threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Win32.UnsafeNativeMethods.CreateWindowEx(Int32 exStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32 x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef hMenu, HandleRef hInst, Object pvParam) at Microsoft.Win32.SystemEvents.CreateBroadcastWindow() at Microsoft.Win32.SystemEvents.Initialize() at Microsoft.Win32.SystemEvents.EnsureSystemEvents(Boolean requireHandle, Boolean throwOnRefusal) at Microsoft.Win32.SystemEvents.AddEventHandler(Int32 key, Delegate value) at Microsoft.Win32.SystemEvents.add_EventsThreadShutdown(EventHandler value) at System.Drawing.SafeNativeMethods.Initialize() at System.Drawing.SafeNativeMethods..cctor() --- End of inner exception stack trace --- at System.Drawing.SafeNativeMethods.get_ThreadData() at System.Drawing.SystemBrushes.FromSystemColor(Color c) at System.Drawing.SystemBrushes.get_Window() at System.Windows.Forms.DataGridTableStyle.get_DefaultAlternatingBackBrush() at System.Windows.Forms.DataGridTableStyle..ctor(Boolean isDefaultTableStyle) at System.Windows.Forms.DataGrid..ctor() at DotNetControls.MainControl.InitializeComponent() at DotNetControls.MainControl..ctor() --- End of inner exception stack trace --- Server stack trace: at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark) at System.Activator.CreateInstance(String assemblyName, String typeName) at System.AppDomain.CreateInstance(String assemblyName, String typeName) at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName) at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(Met hodBase mb, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessa ge msg, Int32 methodPtr, Boolean fExecuteInContext) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName) at Adapter.CreateApp() in ... Tag: ParkingWindow revisited Tag: 73660
  - 10
    - Button swallows keys. Bug? Workaround? The Setup: ================ I have a cardswiper attached to my keyboard, so that when I swipe a card I get "keyboard input" that looks something like: %748a45a1246fbac9d8fdeaf3572f221b? I would like forms in my application to handle these card swipes. To this end, I've made a base Form that sets KeypPeview=true, and that overrides the ProcessDialogKey method. The Bug: ========== This setup works well, except in a few circumestances. One common circumstance is if I have buttons with shortcuts (e.g. a button whose Text attribute is "&add member". Here "a" is a shortcut. I have noticed that if any button on the form has the focus, then "a" is consumed by the button and does not make it to ProcessDialogKey. If something else (like a listbox) has the focus, then I do receive the key in ProcessDialogKey. Does anyone have a solution, an idea, or a workaround? Thanks in advance! Felix Tag: ParkingWindow revisited Tag: 73659
  - 11
    - Proxy servers and embedded windows control in IE Hi there, I have a windows control embedded in a web page using the <object> tag. The control sometimes needs to access an aspx page using HttpWebRequest/Response (aspx page is located on the same web server that the .dll file is located in). This works perfectly when the client is not connecting through a proxy server. When the client is connected to the web via a proxy server, myHttpWebRequest.GetResponse() would fail with a 407 Authentication Required. I realize that any HttpWebRequest object has a Proxy property, but whenever I tried to access it I got a SecurityException (Request for type WebPermission failed). So to temporarily get past this problem, I gave the dll FullTrust for my computer. Now no exception is thrown when I try to access the Proxy property. New problem. I got the proxy information using GetDefaultProxy(). It is able to grab the address for the proxy server because I was able to do MessageBox.Show(proxyObject.Address.ToString()). So I *assume* I have the proxy information. However, when I try to do a myHttpWebRequest.GetResponse(), I still get a 407 Authorization required error. There does not seem to be any login/password for the proxy server... or if there is, I don't know how to find it. So is the cause of the problem because the proxy server thinks that whatever is running the dll (I assume the JIT compiler or whatever) is trying to access the proxy server? Or if not, what is the problem and how do I go about fixing it? Thanks, Wendy Tag: ParkingWindow revisited Tag: 73658
  - 12
    - adding a control to a form I converted a VB6 control to .NET using aximp. The converted control can be added to the toolbox. However, when I tried to add the control onto a form, VS throws the following error: "The .NET assembly 'Name.Interop.mycontrol' could not be found". Nevertheless, the converted control will be successfully added to the form in the second trial. Does anyone know how to fix this problem? Tag: ParkingWindow revisited Tag: 73657
  - 13
    - Form scrolling problem I have a child form that has autoscroll set to true. However, when the mdi parent is maximized and the child form is maximized, no scroll bars appear, even though there is more controls and data below the visible area. Is there a way to scroll the child form and/or the mdi parent when both are maximized? Thanks for any help. Bernie Yaeger Tag: ParkingWindow revisited Tag: 73655
  - 14
    - Forms question (.) I've created a custom control. And now I've done something that prevents me from using the designer to layout controls on my custom control. I tried deleting the .resx file, thinking the VS would just regenerate it, but did not. Here's how I got the problem: I created a new user control. I called it BaseControl. I created another new user control. I called it DerivedControl. After VS generated the .cs file, I changed the base class to BaseControl. EG: public class BaseControl : System.Windows.Forms.Control public class DerivedControl : BaseControl Now I am unable to add controls to DerivedControl using the designer. I have to manually create the code in .cs file. This gets really hard to lay things out. So, what I can do so that I can use the designer? Thnx Matt Tag: ParkingWindow revisited Tag: 73653
  - 15
    - ComboBox Datasource problem Hi, i am having a little problem with a combobox that i set his datasource property to a collection, but doesn populate its items, the strange thing is that i do the same thing on a datagrid and it works fine. Take a look: Public Class Account Public Sub New(ByVal txtname As String, ByVal txtamount As Double) name = txtname amount = txtamount End Sub End Class **************************************** Dim Accounts As New Collection() Dim NewAccount As New Account("numer1", 1000) Accounts .Add(NewAccount , 1) Dim AnotherAccount As New Account("numer2", 2000) Accounts .Add(AnotherAccount , 2) ******************************************* Me.ComboBox.DataSource = Nothing Me.ComboBox.DataSource = Accounts Me.ComboBox.DisplayMember = "Name" Me.ComboBox.ValueMember = "Amount" -----Error "An unhandled exeception of type 'System.InvalidCastException ocurred in microsoft.visualbasic.dll Cast from type 'Microsoft.VisualBasic.Collection' to type 'Object()' is not valid'" Any ideas? why i can set the same datasource for a datagrid and the is no error showing? am i manipulating wrong the collection? Any suggestion will help. Thanks for your time Tag: ParkingWindow revisited Tag: 73652
  - 16
    - Change Cursor over ActiveX control Hello, I am trying to build a form that can display HTML content in the background and various controls in the foreground. I am able to achieve this using the WebBrowser activex and adding foreground controls to the form. So far everything is ok. My problem is that I want to control the Cursor over the controls and the background. Since the WebBroser (my background) is an activex, I cannot control it's cursor! I had also problems in this configuration with mouse events, but thanks to you guys that one is now solved with IMessageFilter. So my question is: How can I control the cursor shape over an ActiveX control? Thanks Tag: ParkingWindow revisited Tag: 73651
  - 17
    - Disable Performance Counters Hi Could anybody please explain the implecations of setting the value " HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PerfProc\Performance\Di sable Performance Counters" to false on a Win2k server. Regards Ash. Tag: ParkingWindow revisited Tag: 73649
  - 18
    - Problem: HowTo update UI from workerThread? Hi! I want to update an userinterface from a background thread. I think that a good way to do this is to use to use methodinvoker in UI-thread and then begininvoke in workerThread to pass parameters back and update the UI. But i have one question. The Method i start with begininvoke is a public sub on another class (not the UI-class). Do I have to pass the form (like a reference) to the other class which the workerthread uses to be able to use it´s begininvoke method? Is this a good way to do this. Here is my code: Public Class Form1 Inherits System.Windows.Forms.Form #Region " Windows Form Designer generated code " ' Some code Me.Label1 = New System.Windows.Forms.Label ' Some more code #End Region Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim workerThread As New MyWorkerClass Dim mi As MethodInvoker = New MethodInvoker(AddressOf workerThread.StartWork) mi.BeginInvoke(Nothing, Nothing) End Sub Public Sub UpdateLabel(ByVal o As Object, ByVal e As System.EventArgs) Dim myEvent As MyLabelEvent = CType(e, MyLabelEvent) Label1.Text = e.LabelText() End Sub End Class Public Class MyWorkerClass Public Sub StartWork() Dim e As System.EventArgs While True e = New MyLabelEvent("Text on label") Dim lst As Object() = {Me, e} ???.BeginInvoke(New System.EventHandler(AddressOf ???.UpdateLabel), lst) DoSomeWork() End While End Sub Public Sub DoSomeWork() End Sub End Class Public Class MyLabelEvent Inherits System.EventArgs Private _labelText As String Public Sub New(ByVal label As String) MyBase.New() _labelText = label End Sub Public Property LabelText() As String Get Return _labelText End Get Set(ByVal Value As String) _labelText = Value End Set End Property End Class Best Regards / Steve Tag: ParkingWindow revisited Tag: 73637
  - 19
    - Microsoft Application Block pattern Long shot but here goes..... I am developing a vb.net application using the MS application block pattern, available @ http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag/html/uipab-ch03.asp And I have developed some views that derive of Microsoft.ApplicationBlocks.UIProcess.WindowsFormView BUT I am unable to get any key press events, I want to stop the user pressing the Alt+F4 key to close the application, I can do this in a normal application very easily so don't bother replying with a simple example, what I want to know is why I'm not getting the events when using the application block patterm? the application block is written in C# and I have tried overriding the the KeyDown method in the application block but don't get any event being caught there either. Anyone got any ideas? Cheers for any help in advance Ollie any example class is shown below.... Public Class Welcome Inherits Microsoft.ApplicationBlocks.UIProcess.WindowsFormView .... .... .... Protected Overrides Sub OnKeyDown(ByVal e As KeyEventArgs) If e.KeyCode = Keys.Alt Then ErrorHandler.ProcessError("ALT PRESSED") Else MyBase.OnKeyDown(e) End If End Sub Tag: ParkingWindow revisited Tag: 73636
  - 20
    - how to lock focus of a form Hello I put my Options on e separated form and want to lock the focus on it until user click ok or cancel, i mean deactivate the main form when option form is shown (like IE option or most of the windows applications). how`? Tag: ParkingWindow revisited Tag: 73634
  - 21
    - MDI and Word application I would like to open a Word application into a MDI application. I do this : Word.ApplicationClass WordApp = new Word.ApplicationClass(); WordApp.Visible = true; WordApp.Activate(); How can I open the object WordApp into a MDI application? Tag: ParkingWindow revisited Tag: 73632
  - 22
    - MDI Menus Bug? Hi all, I've found a straing error (NullReferenceException) in a MDI Environment with two children merging menu with the MDI Container. By changing active child from one with menu to other without I finally get the exception. Anybody knows if menu merging is unstable? I'm using VC# and NET Framework 1.1 on XP Pro. TIA. Julio Tag: ParkingWindow revisited Tag: 73630
  - 23
    - MDI Menus Bug? Hi all, I've found a straing error (NullReferenceException) in a MDI Environment with two children merging menu with the MDI Container. By changing active child from one with menu to other without I finally get the exception. Anybody knows if menu merging is unstable? I'm using VC# and NET Framework 1.1 on XP Pro. TIA. Julio Tag: ParkingWindow revisited Tag: 73629
  - 24
    - Control .exe Hi I want to make a small application who stop launch a .exe always in 8:00 AM and 11:59 AM How i can do that ? -- Ceci est une signature automatique de MesNews. Site : http://mesnews.no-ip.com Tag: ParkingWindow revisited Tag: 73623
  - 25
    - TabControl - change the tab shapes and appearances? I have tried without success (using C#) to change the standard rectangular tabs (for the TabPages) to look like the ones in Messenger - funky curved jobs. However whenever I try to overwrite an existing tab, either by superimposing a bitmap over it, or by manually drawing a new shape with the Graphics methods, the standard rectangular tab outline always shows through. I captured both the DrawItem and Paint events. I saw a partial solution in Code Project, which used a wrapper DLL around UxThemes.dll, but this involves installing this extra DLL with my product. And I couldn't get it to work anyway! It seems this is a known problem in .NET. A colleague using C++/MFC had no trouble doing this. Any suggestions? - please! Tag: ParkingWindow revisited Tag: 73620
- Next
  - 1
    - Edit & View HTML Files from Windows application Hi, Is there any 3rd party component to Edit and View the HTML files from windows application. Regards CV Tag: ParkingWindow revisited Tag: 73619
  - 2
    - Big picture question - Custom control concepts Maybe it's just late but I'm having some trouble with custom control concepts. Do I understand this correctly? If you define a custom control, you are responsible for defining all events and properties, even if it inherits from an existing control that has the events you want? (ie - none of the parent's basic events are exposed available automatically?) Tag: ParkingWindow revisited Tag: 73613
  - 3
    - Disposed forms problem I have a simple problem: In calling form: Private _theForm As MyFormClass() ' in a button click event... If theForm Is Nothing Then theForm = New MyFormClass() End If theForm.Show() The problem is if I close theFrom, then click the button of the calling form again, theForm Is Nothing will evaluate to False (meaning it's a valid reference), yet when theForm.Show() executes, I get an exception "Cannot access disposed object named 'theForm'" Even if I call Dispose on the called form when it's closed, the problem doesn't go away. I thought it was just some garbage collection issue but calling GC.Collect/WaitForPendingFinalizers before theForm.Show() does not make any difference. As a workaround, I could trap the exception in a try block but I was hoping for a more elegant solution, like simply inspecting a property. In the first place, why does theForm Is Nothing evalute to False when the form is already closed/disposed? Many thanks =) Tag: ParkingWindow revisited Tag: 73610
  - 4
    - All forms in a process Hi, Is there an easy way of finding out how many forms a process has created? Something like .AllForms property? Thank you, Tag: ParkingWindow revisited Tag: 73609
  - 5
    - Enumerate forms in a process Hi, Is there an easy way of finding all forms created by an application? One can do bookkeeping or using Win32 API, but is not there an easier way in WinForms? Thank you Tag: ParkingWindow revisited Tag: 73608
  - 6
    - Data Conversion in a grid I have a custom grid control and I'm stuck on an issue in the data binding. Using a method similar to the DataGridColumnStyles class, I have a column style class that allows you to map the bound datasource fields to the grid columns. I've added a Format property which will take a format string such as "{0:C}" which will then convert the underlying data to a currency string. This works very nicely. The problem is when the user goes in and edits data. Let's say that a column has the above currency format string and the data in the cell is $4.45 If the user changes the value, I need to then update the data source. I need to handle the situation where the user puts in either $4.50 or 4.50 and be able to properly convert it back to the underlying type. Is there an easy way to do this without doing a huge case statement for all the different data types? The underlying data can, of course, be of any type. In the grid it's represented as a string. All I have is the format string to know about formatting. I'd rather not have to parse the format string to figure out how to parse the underlying data. Is there some way I can use it to do the parsing? Thanks. Pete Tag: ParkingWindow revisited Tag: 73607
  - 7
    - Comunication Between Threads C# Sorry I forgot to specify the language I am using the language I'm using is C# . Hello, could anyone give me a help on the best way to transmit the results of a function in a thread to where she has started from ? Problem is if i'm not in error that the function launched by the thread has to be void... So, I can't return anything. What's the best way to do this ? I have heard of IPC but don't have mutch knowledge of this but looks like "you" write the data to a file and then read the file, from the main process. Thank You in advance for any help. Fernando Ribeiro Tag: ParkingWindow revisited Tag: 73604
  - 8
    - Comunication Between Threads Hello, could anyone give me a help on the best way to transmit the results of a function in a thread to where she has started from ? Problem is if i'm not in error that the function launched by the thread has to be void... So, I can't return anything. What's the best way to do this ? I have heard of IPC but don't have mutch knowledge of this but looks like "you" write the data to a file and then read the file, from the main process. Thank You in advance for any help. Fernando Ribeiro Tag: ParkingWindow revisited Tag: 73603
  - 9
    - Convert Access application to .NET? I have a small-medium sized Access application that is poorly written. My choices are to either rewrite large parts of the Access app so that it functions reasonably well, or to convert the whole thing to .NET. Not being an Access developer, the .NET approach seems most natural, but I want to do the right thing for the client (even if I end up giving away the contract). I posted on the Access forum and got the impression that my fears about Access being an unstable piece of junk were unfounded, and that most of the things that need to be done in this type of application could be done quickly and easily in Access and the rest could be coded as one would do in any other environment (just have to give up the "free" things that Access provides). Does anyone have any experience with this type of conversion? I would be interested in your thoughts. Alfredo Tag: ParkingWindow revisited Tag: 73602
  - 10
    - Resource DLL Reader? I'm looking for a tool that will allow me to open up a localized resource .dll to verify the strings sitting within it. While I found tools that allow looking at .resource files, I can't find any .dll readers. Can anyone point me to one? Thanks much, Ed Tag: ParkingWindow revisited Tag: 73596
  - 11
    - Preventing forms from showing up before their layout is completed Hi, When my forms show up (i.e. visible set to true), they show up immediatly while their components (labels etc...) are still being displayed. This gives the application a very unprofessional feeling. I would like to know if there's a command to fix that. I would like my components (forms, panels) to not show up until everything in them is processed and ready to be displayed. Thanks in advance for any help! Ana L. Tag: ParkingWindow revisited Tag: 73588
  - 12
    - Complex properties in custom controls I have a control, let's call it MyControl. One of the properties of MyControl is MyControlStyle. MyControlStyle is a class with a number of properties. MyControl always has a valid instance of MyControlStyle (it is instantiated in the field declaration). In the property grid, I want to lay out the items in MyControlStyle when someone selects a MyControl on the form. They are all simple data types and don't require any sort of custom designers or anything in themselves. How do I get the properties of MyControlStyle to show up in the property grid without duplicating the properties in MyControl. I mean, if I have to pass the properties through like that then it's kind of pointless to have the MyControlStyle class separate. Thanks. Pete Tag: ParkingWindow revisited Tag: 73585
  - 13
    - WinForms, Events, and Subscribers Background -------------------------- I am in the process of creating a WinForms app with many forms. I have a set of forms that all subscribe to events on a custom object. When the forms are created I manually create a subscription in the form to one or more events in the custom object. (BTW, this is the same design pattern used by IssueVision discussed at DevDays). I have a controller form (MDI parent) that determines which child form is currently being viewed. When a new child form is selected, the current child form is manually closed [using Form.Close()] and disposed [using Form.Dispose()] and then the new form is shown. This keeps only one child form open at a time. Question -------------------------- Even after child forms are closed and disposed, when events are raised from the custom object, the events are still triggered in the disposed child forms. Could someone explain why this is happenning? I must be misunderstanding something. Do the child forms need to manually unsubscribe from the events in the Closing event? Is there a better place to do this? TIA, Doug Tag: ParkingWindow revisited Tag: 73583
  - 14
    - Need advice on making a MessageBox replacement I'm looking to make an enhanced MessageBox. I want to make it work very much like the regular MessageBox as far as developers are concerned, so I'd like to use the Show() method to display it. However, I want it displayed modally, which we normally achieve with ShowDialog(). Is there a way that the called form can force itself to display modally, or can you think of another way I can do this? Another question I have is about icons. I want to pass a standard MessageBoxIcon enum to the Show() method and then display the OS-specific icon that was requested. In other words, it'll look different on XP than on 2000. To this end I can't simply stick a graphic in my assembly. I can probably figure out how to DRAW the icon myself, it's RETRIEVING it from the system that's beyond me right now. Suggestions? Tag: ParkingWindow revisited Tag: 73579
  - 15
    - ImageList Errors - What a crap! Hi, Whenever I add images to imagelist and running my application I encounter this error: ------- An unhandled exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll Additional information: Exception has been thrown by the target of an invocation. Then it highlights the following line in my application code: Me.ImageList1.ImageStream = CType(resources.GetObject("ImageList1.ImageStream"), System.Windows.Forms.ImageListStreamer) -------- Also, the value of "Me.ImageList1.ImageStream" is "Nothing". I have looked up some Microsoft site for this, but couldn't really solve this problem since it happens for images of every size . Thanks in advance --- OS = WinXP Pro VS.Net 2003 Framework 1.1 PS: Where is all those.....Net Microsoft talked about? If they know that DI cracks with so many exceptions, then why did they release their product ? Doesn't any MS guy take responsibility for all these mistakes?I have paid money for their product, you know? Tag: ParkingWindow revisited Tag: 73577
  - 16
    - Raise Format event of Binding class Hello everybody, Iâ??m creating a Bindind class descendent, in this class I only add one property and one method, the property is an class that provides methods to format the data on the Format event of Binding class and to parse the data in the Parse event of Binding class. This works fine, but in some times in my application (when the way of how the data formatted is changed) I need that to force the Format event to be raised, but how can I do it? I didnâ??t find any method to do this, looking at stack trace I only have found private methods (maybe I'm wrong)â?¦ Iâ??ll be very grateful with any kind of helpâ?¦. Thanks Tag: ParkingWindow revisited Tag: 73571
  - 17
    - datagrid Hi, I have a dataset with a number of tables and a number of relations between the tables. I display the the dataset using the datagrid. When I expand a main table row, I see the name of a realtion, which I can click, to get a list of child rows. What I would like to do is to get not the name of the relation, but a list of the child rows. I fugure there is somethign simple I am missing? Thanks kk Tag: ParkingWindow revisited Tag: 73568
  - 18
    - Can't Get Scrll Bars on a Form I have a Form with Properties set to Autoscroll=true. When I resize the window no scroll bars. Can someone adivse how to get this to work. My from resized prevents access to controls on form since no scroll bars. Thanks, Neil ngottlie@bassocap.com Tag: ParkingWindow revisited Tag: 73564
  - 19
    - Productivity: WebForms vs. WinForms Although an impossible question to answer, I fell urged to raise it anyhow. Given a fairly complex ERP application scenario, what's your estimation for the X-ratio dev. time for WebForms app ----------------------------------- = X dev. time for WinForms app ? My own experiences tell me that it should be about 2, but peers differ in opinion. Some agree, some says 1, and some says 3... Regards, // Martin Rosén-Lidholm PS Sorry for the cross post, but I really would like to hear both camps' views on this subject. Tag: ParkingWindow revisited Tag: 73558
  - 20
    - Application .exe AND/OR Static DLL disappears Here is the issue a. We have an exe that is referring to our custom STATIC DLL that is present in the SYSTEM 32 folder. b. Whenever there is SHUT DOWN (ungracefully due to POWER DOWN) and especially when TCP LISTENER WAS WORKING in the windows application (SERVER) following things happen: - 1. Either the static DLL that the application is referring to disappears from SYSTEM32 folder . AND/OR 2. ALONG WITH THE static DLL , the main application .exe Disappears ... (i.e Start->Programs->app->app_server can not find my app_server.exe since that executable file has disappeared PHYSICALLY from the program files ->app folder location ??!! Is there any sane explaination to this? c. Moreover it does not happen everytime... but occasionally during the POWER SHUT DOWN and ugraceful shut down of the system. d. I am not 100% sure but VERY RARELY even without ungraceful shutdown/ but by shutdown process closing the application also has given this result.. Problem is... it occurs occasionally. I am searching but any immediete pointers if any would be helpful. Thanks, Harsh Tag: ParkingWindow revisited Tag: 73557
  - 21
    - Application.exe and/OR static DLL DISAPPEARS (Visual Studio.net 20 We are occasionally are facing this issue... not much help available on the net... Here is the issue a. We have an exe that is referring to our custom STATIC DLL that is present in the SYSTEM 32 folder. This is windows application developed using VS.net 2003 with C#. b. Whenever there is SHUT DOWN of system (ungracefully) due to power failure and especially when TCP LISTENER in the application WAS RUNNING in the windows application (SERVER) following things happen: - 1. Either the static DLL that the application is referring to disappears from SYSTEM 32 folder. OR 2. ALONG WITH THE static DLL , the main application .exe Disappears ... The START->PROGRAMS->application->app_server.exe this keeps searching because the application.exe has DISAPPEARED... Is there any sane explaination to this? Moreover, this happens occasionally. c. The installer has been created with the combination of INSTALL SHILED EXPRESS and VS.NET 2003 set up files. c. Moreover it does not happen everytime... but occasionally during the POWER SHUT DOWN. I am searching but any immediete pointers if any would be helpful. Thanks, Harsh Tag: ParkingWindow revisited Tag: 73555
  - 22
    - Tablet Pc Help required Hi All, I am new to tablet pc development. My working enviorment is Windows 2003 with Tablet PC SDK 1.5 installed and C#. I am designing a control for tablet pc. I am using a panel for pen Input. Now when user is writing (Using Pen) and is near the end of panel I want to increase panel's height so that user can have more area to write on.Please provide Suggestions. Thanx Munish Tag: ParkingWindow revisited Tag: 73549
  - 23
    - inherited form i have a generic form with alot of controls on it, when i inherit a new form, i can not see the design of my new form on the visual studio and get an error on designtime. Error is: The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: form2 --- The base class 'form1' could not be loaded. Ensure the assembly has been referenced or built if it is part of the project. Tag: ParkingWindow revisited Tag: 73543
  - 24
    - Problem with menus Hello: I have a MainMenu and want to drag the MenuItems by pressing ALT + MouseDown on an Item. I can not find any event to do it because there is no way to stop the MenuItem to popup, even overriding and not calling the base methods.. and when the submenu is visible, the messages can not be captured, even using Capture = true or a Message Filter. Any suggestion?? Tag: ParkingWindow revisited Tag: 73542
  - 25
    - DataGrid Refresh problem I have a data grid refresh problem. I have a few columns and the first column is data in the form of numbers. And in the form of the data grid if I specify for example something like a code(in a text box) the column of numbers should change colors depending on whether the number was in the specified code(if it belongs to the code, color the cell (first column) in Red and if not in some other color). It all works out fine until I scroll up/down and trigger the paint event. The changed colurs seem to be changed. I want the refreshing to be done for all records for that column, but it seems it only refreshes parts of the datagrid. How do I make the refreshing to be done to the whole datagrid rather than a part of it, so I can get the original colur change for each cell of the first column. Code //method to be passed into the coloumn style that determines the color public Color MyGetColorRowCol(int row, int col) { // just conditionally set colors based on row, col values... short number = 0; short retval = 0; Color c = Color.PaleGoldenrod; if (col == 0) { number = array[cIndex]; retval = GetIfInChannelOrNot(code, number); if(retval==0) { c = Color.LightGreen; } if(retval!=0) { c = Color.Red; } cIndex++; if(TotalNumbers == cIndex) { cIndex = 0; } } else { c = Color.LightGray; } return c; } //delegate required by custom column style public delegate Color delegateGetColorRowCol(int row, int col); public class DataGridColoredTextBoxColumn : DataGridTextBoxColumn { private delegateGetColorRowCol _getColorRowCol; private int _column; public DataGridColoredTextBoxColumn(delegateGetColorRowCol getcolorRowCol, int column) { _getColorRowCol = getcolorRowCol; _column = column; } protected override void Paint(System.Drawing.Graphics g, System.Drawing.Rectangle bounds, System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush foreBrush, bool alignToRight) { // the idea is to conditionally set the foreBrush and/or backbrush // depending upon some crireria on the cell value // Here, we use a delegate to retrieve the color try { backBrush = new SolidBrush(_getColorRowCol(rowNum, this._column)); foreBrush = new SolidBrush(Color.Black); } catch(Exception ex){ /* empty catch */ } finally { // make sure the base class gets called to do the drawing with // the possibly changed brushes base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight); } } } Tag: ParkingWindow revisited Tag: 73540

This issue was already reported by many others. However, I did not find any useful solution / workaroud for this.

The problem is that when you run a WindowsForms application, you may randomly get the following exception:

Cannot access a disposed object named "ParkingWindow"

In this NG there is some detailed description regarding this problem by Clive Dixon (titled "Derived combo box controls in forms - MessageBox.Show breaks the control's message routing") but no practical workaround is suggested.

Could someone in MS suggest how to avoid this issue?

Thanks in advance,
--
Benzi

(my application is multi-threaded, uses invokes, runs with framework 1.1)

Top