TreeView and ObjectDisposedException

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  - 1
    - TreeView and ObjectDisposedException Hi All! I have an application that opens form with TreeView. I want to close form by AfterSelect Event: private void MyTreeView_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e) { this.Close(); } But everytime when I clicking on TreeView Item, I get following error: An unhandled exception of type 'System.ObjectDisposedException' occurred in system.windows.forms.dll Additional information: Cannot access a disposed object named "TreeView". Any ideas? Thank you, Vitaly Sedov Tag: TreeView and ObjectDisposedException Tag: 67499
  - 2
    - File Association How do I go about (programmatically) associating files created by my App with a particular icon, and how do I ensure that the app is run and loaded with a file when double-clicked - all in the same way that an App like MSWord does it Thanks in advanc Rich Tag: TreeView and ObjectDisposedException Tag: 67495
  - 3
    - WinForm App and TaskManager Hi, I've a winform app and want to start the program without beeing visible in the task manager on a Windows ME box. I've seen some programs that start using the "Run" option in the registry and not appearing in the task manager. These programs are written in VC++ and I'm wondering how can I do that for my C# application? If this is not possible with an UI, can I write a background process which starts silently to monitor the other app? Remember, we're talking about a ME/98 box and have no services available. The background is that I want to prevent a user from killing my monitoring software in the task manager. Thanks for your ideas, Joerg Tag: TreeView and ObjectDisposedException Tag: 67493
  - 4
    - Controlling program flow in VB.NET I am a beginner in using VB.Net although I do have experience in VB6. It always seems that I have to keep my startup object in memory otherwise the application will just end. Even if I have transfered control to another form. It is irritating to have to keep my splash screen in memory just to make sure that my application will continue running. Can anyone help me? I'm going crazy already!! Tag: TreeView and ObjectDisposedException Tag: 67483
  - 5
    - How to get instance of control by name Hi, imagine having an INI-file with entries like: # key=Control / value=Text property of control controlA=bla bla bla controlB=bla bla bla controlA and controlB are different controls of types like TextBox, etc. Closing form will write INI-file, storing control names and text property of these Loading form will read INI-file and set text value of corresponding control quite a simple task, if you'll do it as follows: .... switch (iniControl) { case "controlA" : controlA.Text = iniValue; break; ... } ... But what about a more generic solution? Assuming that the key-value of INI-file is a known control, an instance within the form, what about a solution like: - get instance of the control by its name - set value from INI-file to Text-property Tried to solve this by using reflection - something like GetType(iniControl), but never suceeded. What do you think how this could be solved? Thanks and regards - Jari Tag: TreeView and ObjectDisposedException Tag: 67480
  - 6
    - C# GDI+/WindowsForms Learning-Project started Hi I'm started a learning project on http://sharpgrid.sourceforge.net. Learning item is a GDI+ - based entirly written in c#. Please check code and give improvements Than Alex Tag: TreeView and ObjectDisposedException Tag: 67479
  - 7
    - Search for Files with System.IO.DirectoryInfo.GetFiles() I am trying to locate all image files in a particular folder. I use the System.IO.DirectoryInfo to open information about the specific directory. I am then trying to query all of the images in that folder whether the extension be .jpg, gif, or bmp. So far I have not had any luck passing more than one extension to 'GetFiles(String searchPattern). Is there a way to pass more than one extension to this method? Also is there a better way to search for files? Something more along the lines of FindFirstFile from the Win32 API? Thanks for the help Brian Tag: TreeView and ObjectDisposedException Tag: 67472
  - 8
    - Dll Import problem ** I forgot to ask one more thing, Just see the last few lines. I have a Dll written in C. And I want to Import that Dll into my C# program and use a function in the Dll. In a previous newsgroup article I saw that I may need to wrap the Dll in a C++ .NET class and then use that in my C# application. But when I run my program I get an error saying System.IO.FileNotFoundException: File or assembly name "abc", or one of its dependencies, was not found. File name: "abc" abc is my wrapper project class library. here is my wrapper class is given below. The lib name is wdll.lib and the header is dll.h. #include "dll.h" #pragma comment(lib, "wdll.lib") namespace MyWrapper { public __gc class Class1 { public: static void myfunc1(long JobNo) { _libmain(JobNo); } static char * myfunc2(void *vJobRec, short field, short subfield) { return (GETJF_NAME( vJobRec )); } }; } Here is the actual dll header file. extern "C" { void WINAPI _libmain ( long JobNo ); void * WINAPI _getjobfield ( void *vJobRec, short field, short subfield ); }; ..... and here is where I am calling it. using MyWrapper; unsafe { Class1.myfunc2(null,0,0); } It throws the exception here, System.IO.FileNotFoundException: File or assembly name "abc", or one of its dependencies, was not found. File name: "abc" ________________________________________________ So then I tried to acces the Dll in a more traditional way , but would result in the same error. Here is just a simple console application that I did, using System; using System.Runtime.InteropServices; using System.IO; using System.Reflection; using MyWrapper; namespace test { class Class1 { [DllImport("kernel32.dll", CharSet=CharSet.Auto)] static extern IntPtr LoadLibrary(string lpFileName); [DllImport("wdll.dll")] public static extern IntPtr _getjobfield([MarshalAs(UnmanagedType.LPStr)] string s, short i1, short i2); [STAThread] static void Main(string[] args) { // Esure current directory is exe directory Environment.CurrentDirectory = Path.GetDirectoryName( Assembly.GetExecutingAssembly().Location ); string dllPath = Path.GetFullPath( @"C:\SoftwareDevelopment\testing\testing\test\test" ); LoadLibrary( dllPath ); Console.WriteLine( _getjobfield(null,0,0) ); } } } ******* ****************************************************************************** And in the previous mail I for got ask one more thing since _getjobfield returns a char pointer how can I read that value. currently what I am trying to do is unsafe { Class1.myfunc2(null,0,0); } but when i DO THIS unsafe { char * p = Class1.myfunc2(null,0,0); } It say's can not convert sbyte* to char*. The thing is that I am sending char* so I do not know where sbyte comes from But it throws the exception, Can any one help. Thanks Tag: TreeView and ObjectDisposedException Tag: 67470
  - 9
    - Dll Import problem I have a Dll written in C. And I want to Import that Dll into my C# program and use a function in the Dll. In a previous newsgroup article I saw that I may need to wrap the Dll in a C++ .NET class and then use that in my C# application. But when I run my program I get an error saying System.IO.FileNotFoundException: File or assembly name "abc", or one of its dependencies, was not found. File name: "abc" abc is my wrapper project class library. here is my wrapper class is given below. The lib name is wdll.lib and the header is dll.h. #include "dll.h" #pragma comment(lib, "wdll.lib") namespace MyWrapper { public __gc class Class1 { public: static void myfunc1(long JobNo) { _libmain(JobNo); } static char * myfunc2(void *vJobRec, short field, short subfield) { return (GETJF_NAME( vJobRec )); } }; } Here is the actual dll header file. extern "C" { void WINAPI _libmain ( long JobNo ); void * WINAPI _getjobfield ( void *vJobRec, short field, short subfield ); }; ..... and here is where I am calling it. using MyWrapper; unsafe { Class1.myfunc2(null,0,0); } It throws the exception here, System.IO.FileNotFoundException: File or assembly name "abc", or one of its dependencies, was not found. File name: "abc" ________________________________________________ So then I tried to acces the Dll in a more traditional way , but would result in the same error. Here is just a simple console application that I did, using System; using System.Runtime.InteropServices; using System.IO; using System.Reflection; using MyWrapper; namespace test { class Class1 { [DllImport("kernel32.dll", CharSet=CharSet.Auto)] static extern IntPtr LoadLibrary(string lpFileName); [DllImport("wdll.dll")] public static extern IntPtr _getjobfield([MarshalAs(UnmanagedType.LPStr)] string s, short i1, short i2); [STAThread] static void Main(string[] args) { // Esure current directory is exe directory Environment.CurrentDirectory = Path.GetDirectoryName( Assembly.GetExecutingAssembly().Location ); string dllPath = Path.GetFullPath( @"C:\SoftwareDevelopment\testing\testing\test\test" ); LoadLibrary( dllPath ); Console.WriteLine( _getjobfield(null,0,0) ); } } } But it throws the exception, Can any one help. Thanks Tag: TreeView and ObjectDisposedException Tag: 67468
  - 10
    - Windows XP Button vs Framework window form button Hi, How could I create the same button and tab of windows XP in vb.net i found that the button that I create in vb.net is different with windows xp one. anyone know how to do that ? pls advise me Tag: TreeView and ObjectDisposedException Tag: 67465
  - 11
    - Font Class - a big performance eater? I was curious if anybody else noticed this fact. Everytime you use the font class, especially creating multiple instances of the Font class in an iteration, there is a significant performance hit. The way I noticed was due to a bug in my code. I have a list class where each item is a separate object with various properties, among which a Font. At some point I wanted to test my list with a lot of items so I made a loop that was creating like 10000 items, but I used a constructor that passes a font too and I used new Font(...). To my surprize and astonishement, it took an average of 7 milliisecond for the framework to create each item. I got into a sort of panic, as I thought that my event model was too extensive or I forget to dispose some objects. It turned up that when I removed the Font object from the costructor with a null, the average time went from 7 milliseconds to 0.02 miliseconds!! That is like 350 times faster... Now I am even worried about any place that I might use the font constructor. Did anybody noticed this behavior in other instances? Does anyone know an optimized way of using fonts thank you Iulian Tag: TreeView and ObjectDisposedException Tag: 67459
  - 12
    - Changing the default border color/appearrance of WindowsForms Short of globally changing the appearance of a WindowsForm's border color, appearrance...(like changing the color scheme in Display Properties), is there a way to change simple things like the border color at the application level Michael Tag: TreeView and ObjectDisposedException Tag: 67457
  - 13
    - No-Touch Deployment app.config problem I'm having a very frustrating problem with a no-touch-deployed application and its app.config file. When it loads from a remote server, it cannot get any settings from the app.config file. In trying to locate the problem, I have tested the following things: 1. The application works flawlessly when deployed via XCopy. 2. The application works flawlessly when accessed on my own machine via http://localhost. 3. The app.config file is accessible. I can browse to it manually and download it. 4. The app.config file is being downloaded by the application and stored in the IE browser cache, but is still not accessible to the application. 5. Another application - a simple one for testing this situation - exhibits exactly the same behaviour. I have already removed the *.config mapping from IIS for the relevant directory, and, just like before, the app.config is still accessible. I have enabled anonymous access. Just like before, the app.config is still accessible. I have thus concluded that the problem is not with my server configuration. Is anyone able to offer any insight into the situation? Anyone else encountered this problem? John N Tag: TreeView and ObjectDisposedException Tag: 67451
  - 14
    - capturing how a form was closed I have a 2 form application - the first form opens the second form, which allows a user to create a file. The first form then needs to do something based on how the form was closed. how the code looks Dim tf As New frmNewLeague tf.ShowDialog() If < tf closed using save button > Then do stuff else do other stuff End If Is using a global variable the best way, or can you cature how a form is closed? Derruck Tag: TreeView and ObjectDisposedException Tag: 67448
  - 15
    - Radiobutton databinding: Hi, I have a radio button group which I want to bind to a table column whose value is a string. Based on the string value, I want to checkmark one of the radio buttons. Here is my code in an attempt to do this. But it fails. The events don't even fire. I don't know what I am missing. All other databindings (to text boxes and combo boxes even check boxes) seem to work fine. But then, those controls don't need datatype conversion either. Can somebody please help? CatalogsDV is a Dataview of my datasource. And I have a currencyManager that positions the data. I have no problems there since other controls seem to work. Binding b2b = new Binding("Checked", catalogsDV, Const.CATALOGTYPECOLUMN); b2b.Format += new ConvertEventHandler(FormatCatalogType); b2b.Parse += new ConvertEventHandler(ParseCatalogType); this.rdbtnB2B.DataBindings.Add(b2b); // // // // private void FormatCatalogType(object sender, ConvertEventArgs e) { if (e.DesiredType != typeof(string)) return; string ctype = (string)e.Value; if (ctype == "B2B") this.rdbtnB2B.Checked = true; else if (ctype == "B2C") this.rdbtnB2C.Checked = true; } private void ParseCatalogType(object sender, ConvertEventArgs e) { if (e.DesiredType != typeof(bool)) return; bool ctype = (bool)e.Value; if (ctype == true) e.Value = "B2B"; else if (ctype == false) e.Value = "B2C"; } I am confused with the complexity of Databinding. But trying to learn. I assume the above event methods are correct, at least logically. I have placed breakpoints inside both the above events. But they don't seem to fire at all. Can somebody please help? Babu. Tag: TreeView and ObjectDisposedException Tag: 67430
  - 16
    - data grid Control Using vb in vstudio .net I have implement the datagrid control in the application this is the situation I fill my datagrid with data and the scroll of the data grid not appear to be anable but it is enable mydatagrid.enable = "true", but the scroll disappear for any reason. see de jpg http://www.properlyfit.com/test.html did some body know why is this happening ? Tag: TreeView and ObjectDisposedException Tag: 67429
  - 17
    - Tables don't show in drop down of tablestyle in property window of datagrid Ok I'm working on a custom IDE though it's using alot of the same technologies as the VS.Net IDE. I drag and drop the datagrid onto the form (root component) and there is a dataset with tables in the component tray. I then just set the datasource to the dataset and then the datamember to the table I desire. I then open the tablestyles and add a new one and hit the mappingname and hit the drop down and nothing shows up. What I need to find out is how the datagrid populates that list, something somewhere in my IDE isn't allowing the datagrid to populate the dropdown list with the tables in the dataset. So does anyone have any idea how that list gets populated Joe Tag: TreeView and ObjectDisposedException Tag: 67427
  - 18
    - Capture Lost I'm about to modify the message loop in my winform to process the WM_CAPTURECHANGED message and fire an event, before I do I would just like to check there isn't already an event present for this? Haven't noticed one so far, but it seems strange to have it left out! :) thanks, n! Tag: TreeView and ObjectDisposedException Tag: 67426
  - 19
    - Tab Control/Web Browser Control Flicker Hi, I have a tab control with a web browser control embedded in the first tab page. Whenever I resize the tab control the tab itself and web browser control flicker like crazy. Is there anyway to eliminate this flicker? Thanks in advance. Justin Tag: TreeView and ObjectDisposedException Tag: 67424
  - 20
    - queueing messages Hi, Ok, since I began writing this post, I have figured out the majority of my problem. I started out without a clue about how to use messages in my application (not referring to System.Messaging, but to good old windows messages). I want a Win32 application that runs without a window. I figured out how to add a message filter to the application before calling Application.Run(). That solves the problem of catching the message. Now I cannot, for the life of me, find any references to how to put a message on the application queue. Any help would be greatly appreciated. Thanks in advance, Chris Tag: TreeView and ObjectDisposedException Tag: 67417
  - 21
    - Form.AutoScroll Property .NET Framework Class Library documentation on Form.AutoScroll Property #1- If this property is set to true, scroll bars are displayed on the form if any controls are located outside the form's client region #2- Additionally, when autoscrolling is on, the client area of the form automatically scrolls to make the control with input focus visible. Q: How can I avoid #2 from happening? (override the input focus event?). I do not want the form to recenter when I click partly visible controls Thanks in advance for your help mc Tag: TreeView and ObjectDisposedException Tag: 67416
  - 22
    - How to develop user-definable/configurable UIs using Windows Forms and ADO.NET? Hi, I'd like to create a data entry application in which users are able to customise the app and it's UI by adding/removing fields from the data entry form(s), changing the layout of the fields, or changing caption text. Are there any samples that show how this can be done with Windows Forms and ADO.NET?. Or perhaps books, articles, blogs or FAQs that cover this scenario? Cheers, Kunle Tag: TreeView and ObjectDisposedException Tag: 67409
  - 23
    - Long texts in ComboBox's Items Hi, I have a control that holds a ComboBox. When the ComboBox gets filled the text are too long, so, it is possible to read just the half part of the text. I would like to show the whole text in a box (like the tooltipbox) while the user moves over the ComboBox's Items. Does anyone can share some code to do this? Thanx Boris Tag: TreeView and ObjectDisposedException Tag: 67406
  - 24
    - Initial Flicker on Fade Out Greetings Having a bit of a problem with a fade out on a form. I'm using a timer which is enabled via a button and then this timer tick then takes the opacity down to nothing and then eventually closing the application. However, what is happening is that when the button is clicked that enables the timer and thus the first tick, the form goes all black and then then repaints to the original form and fades out smoothly. I'm sure that this does not occur on the button click event, as I've put the thread to sleep at this point, and verified that it happens upon the first firing of the tick event. Here's what I've noticed, this is much worse on forms with many controls, it actually appears if the form rolls into the center leaving the black background for just an instant before proceeding normally. Although this "rolling" may be an optical illusion. Would appreciate if anyone can assist with getting rid of the flicker..........argh... probably something stupid... Private Sub timerFade_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles timerFade.Tic If Me.Opacity <= 0 The Me.Close( Els Me.Opacity = Me.Opacity - 0.0 End I End Sub Tag: TreeView and ObjectDisposedException Tag: 67401
  - 25
    - DateTimePicker Bug with Microsoft.Windows.Common-Controls 6.0 We detected a bug (ValueChange Event not fired) in the DateTimePicker. The bug only occurs when we use the Microsoft.Windows.Common-Controls 6. To reproduce the bug simply create a new Solution with a windows application project Exchange the generated Form1.cs with the code below and put the manifest-file (which follows the code) in your exe-Directory (e.g. bin/Debug) Run the Application an follow the instructions ANY IDEAS TO SOLVE THE PROBLEM *************************************************************** Here ist the code of Form1.c *************************************************************** using System using System.Windows.Forms namespace WindowsApplication public class Form1 : System.Windows.Forms.For private System.Windows.Forms.DateTimePicker dtpSource private System.Windows.Forms.Button apply private System.Windows.Forms.DateTimePicker dtpTarget private System.Windows.Forms.Label label1 private System.Windows.Forms.Label label2 private System.Windows.Forms.TextBox description private System.Windows.Forms.TextBox textBox public Form1( InitializeComponent() this.description.Text = "IMPORTANT: the bug only occurs when you use Microsoft.Windows.Common-Controls 6.0 !!!\r\n + "1. Enter 27.02.2004 in Target\r\n + "2. Enter 26.02.2004 in Source\r\n + "3. Press the apply button\r\n + "4. Change target to 27.02.2004 again\r\n + "BUG: there is no valueChange event fired when you change the date to the previous value" #region Windows Form Designer generated cod private void InitializeComponent( this.dtpSource = new System.Windows.Forms.DateTimePicker() this.apply = new System.Windows.Forms.Button() this.dtpTarget = new System.Windows.Forms.DateTimePicker() this.textBox = new System.Windows.Forms.TextBox() this.label1 = new System.Windows.Forms.Label() this.label2 = new System.Windows.Forms.Label() this.description = new System.Windows.Forms.TextBox() this.SuspendLayout() // // dtpSourc // this.dtpSource.Format = System.Windows.Forms.DateTimePickerFormat.Short this.dtpSource.Location = new System.Drawing.Point(24, 168) this.dtpSource.Name = "dtpSource" this.dtpSource.Size = new System.Drawing.Size(88, 20) this.dtpSource.TabIndex = 0 this.dtpSource.Value = new System.DateTime(2004, 2, 26, 0, 0, 0, 0) // // appl // this.apply.Location = new System.Drawing.Point(128, 168) this.apply.Name = "apply" this.apply.TabIndex = 1 this.apply.Text = "apply ->" this.apply.Click += new System.EventHandler(this.apply_Click) // // dtpTarge // this.dtpTarget.Format = System.Windows.Forms.DateTimePickerFormat.Short this.dtpTarget.Location = new System.Drawing.Point(224, 168) this.dtpTarget.Name = "dtpTarget" this.dtpTarget.Size = new System.Drawing.Size(88, 20) this.dtpTarget.TabIndex = 2 this.dtpTarget.Value = new System.DateTime(2004, 2, 26, 0, 0, 0, 0) this.dtpTarget.ValueChanged += new System.EventHandler(this.dtpTarget_ValueChanged) // // textBo // this.textBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))) this.textBox.Location = new System.Drawing.Point(24, 208) this.textBox.Multiline = true this.textBox.Name = "textBox" this.textBox.Size = new System.Drawing.Size(528, 120) this.textBox.TabIndex = 3 this.textBox.Text = "" // // label // this.label1.AutoSize = true this.label1.Location = new System.Drawing.Point(24, 152) this.label1.Name = "label1" this.label1.Size = new System.Drawing.Size(40, 16) this.label1.TabIndex = 4 this.label1.Text = "Source" // // label // this.label2.AutoSize = true this.label2.Location = new System.Drawing.Point(224, 152) this.label2.Name = "label2" this.label2.Size = new System.Drawing.Size(37, 16) this.label2.TabIndex = 4; this.label2.Text = "Target"; // // description // this.description.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.description.Location = new System.Drawing.Point(16, 16); this.description.Multiline = true; this.description.Name = "description"; this.description.ReadOnly = true; this.description.Size = new System.Drawing.Size(536, 120); this.description.TabIndex = 5; this.description.Text = ""; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(568, 347); this.Controls.Add(this.description); this.Controls.Add(this.label1); this.Controls.Add(this.textBox); this.Controls.Add(this.dtpTarget); this.Controls.Add(this.apply); this.Controls.Add(this.dtpSource); this.Controls.Add(this.label2); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion [STAThread] static void Main() { Application.Run(new Form1()); } private void apply_Click(object sender, System.EventArgs e) { this.textBox.Text = string.Empty; this.dtpTarget.Value = this.dtpSource.Value; } private void dtpTarget_ValueChanged(object sender, System.EventArgs e) { string text = "ValueChanged: " + this.dtpTarget.Value + "\r\n"; this.textBox.AppendText(text); } } } **************************************************************** Here ist the WindowsApplication1.exe.manifest file: **************************************************************** <?xml version="1.0" encoding="UTF-8" standalone="yes"?><assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"><assemblyIdentity version="1.0.0.0" processorArchitecture="X86" name="WindowsApplication1" type="win32" /><description>.NET control deployment tool</description><dependency><dependentAssembly><assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.10.0" processorArchitecture="X86" publicKeyToken="6595b64144ccf1df" language="*" /></dependentAssembly></dependency></assembly> Tag: TreeView and ObjectDisposedException Tag: 67400
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  - 1
    - Problem with tooltip component I have created a class derived from System.Windows.Forms.TextBox. The derived TextBox also has a ToolTip component and an ErrorProvider component. When the form loads, the tool tips for all the derived text boxes work. However, as soon as I set focus in any of the derived text boxes, the tool tip for that control stops working. The error provider has no problems. Steve Binney Tag: TreeView and ObjectDisposedException Tag: 67399
  - 2
    - Suspend Form Repaint? Is there a simple way to suspend a form repaint? I have several things I need to do with a form, and I want to suspend repainting it until the last item is done. Thanks. -- Dave Veeneman Chicago Tag: TreeView and ObjectDisposedException Tag: 67398
  - 3
    - problems with Document2Events on W2K and XP Hi The following (shrinkwrapped) code works ok on Windows 2003 but not on Windows 2000 SP4 and XP where ALL events are blocked (e.g. context menu does not appear, impossible to write in search TextBox etc.) Framework: v1.1.4322 Dependencies on W2000: mscoree.dll 1.1.4322.573 advapi32.dll 5.0.2195.6710 urlmon.dll 6.0.2800.1400 shlwapi.dll 6.0.2800.1400 Which one is the culprit? What can I do during deployment to ensure that my program works on windows 2000 and XP? Code: Public Class Form1 Inherits System.Windows.Forms.Form #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 End Sub 'Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Required by the Windows Form Designer Private components As System.ComponentModel.IContainer 'NOTE: The following procedure is required by the Windows Form Designer 'It can be modified using the Windows Form Designer. 'Do not modify it using the code editor. Friend WithEvents AxWebBrowser1 As AxSHDocVw.AxWebBrowser <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1)) Me.AxWebBrowser1 = New AxSHDocVw.AxWebBrowser CType(Me.AxWebBrowser1, System.ComponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() ' 'AxWebBrowser1 ' Me.AxWebBrowser1.Dock = System.Windows.Forms.DockStyle.Fill Me.AxWebBrowser1.Enabled = True Me.AxWebBrowser1.Location = New System.Drawing.Point(0, 0) Me.AxWebBrowser1.OcxState = CType(resources.GetObject("AxWebBrowser1.OcxState"), System.Windows.Forms.AxHost.State) Me.AxWebBrowser1.Size = New System.Drawing.Size(292, 273) Me.AxWebBrowser1.TabIndex = 0 ' 'Form1 ' Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.Controls.Add(Me.AxWebBrowser1) Me.Name = "Form1" Me.Text = "Form1" CType(Me.AxWebBrowser1, System.ComponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub #End Region Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load AxWebBrowser1.Navigate("http://www.microsoft.com";) End Sub Private Sub AxWebBrowser1_DocumentComplete(ByVal sender As Object, ByVal e As AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent) Handles AxWebBrowser1.DocumentComplete Dim Document2 As mshtml.IHTMLDocument2 = CType(AxWebBrowser1.Document, mshtml.IHTMLDocument2) Dim Document2Events As mshtml.HTMLDocumentEvents2_Event = CType(Document2, mshtml.HTMLDocumentEvents2_Event) Try RemoveHandler Document2Events.onclick, AddressOf event2b Catch 'ex As Exception : Debug.WriteLine(ex.Message) End Try Try AddHandler Document2Events.onclick, AddressOf event2b Catch ex As Exception : Debug.WriteLine(ex.Message) End Try End Sub Private Function event2b(ByVal e As mshtml.IHTMLEventObj) As Boolean e.returnValue = True Return True End Function End Class Tag: TreeView and ObjectDisposedException Tag: 67396
  - 4
    - Modal MDI Child Hi all Sure this has come up plenty of times before but couldn't find it I've a form I want to display modally within an MDI app and get a "Only top level forms can be shown modally..... Any solution to this. I can't beleive it is that difficul Eldon Tag: TreeView and ObjectDisposedException Tag: 67394
  - 5
    - PropertyGrid bug? Hi all, Maybe this has been said before, I'm sorry if it has. I'm making a custom EnumConverter for a propertygrid so it shows other values than the named values of the enum... this works pretty much correctly, and as expected, EXCEPT: When doubleclicking the dropdown box, moving the mouse wheel, or using an accelerator key for the dropdown, it ignores completely the ConverTo() function (which is called when the dropdown is popped up and a value selected), and just doesn't call it. This is a problem as I use this function to convert the string representation to the actual enum value, so the setter receives an string and it causes an invalid property value exception (and doesn't change the value, that is). I could surely make every setter check if it's a string and convert accordingly, but that'd be hell of a lot of work (i'm doing this for many different enums and properties), and that'd rather ruin the usefulness of the PropertyGrid. So is this a bug in the PropertyGrid, am I doing something worng, or is there something I have forgotten to do so I can convert to my enum value when the editor value is changed other than popping up the dropdown? If you need further explanation, let me know Thanks, Javier Campos Tag: TreeView and ObjectDisposedException Tag: 67393
  - 6
    - Save and restore Printer Settings Hell In my windows application I need to save runtime printer settings to an XML file when it is shutting down The next time the application starts I restore them Now there is one big problem I am not able to restore the last used values in the following cases PrinterResolution.X and PrinterResolution.Y when PrinterResolutionKind = Custo PaperSource.Name if PaperSourceKind = Custo Why PaperSource and PrinterSetting constructors are Interna PrinterResolution.X, PrinterResolution.Y and PaperSource.Name are ReadOnly propertie Do you have a solution/workaround for this shortcoming Tag: TreeView and ObjectDisposedException Tag: 67392
  - 7
    - Windows Service (Stopping and Staring) Hi I have developed a Windows Service When I try to start the Service it tells me that it cannot start as there may not be any work to do When I comment out below line of code in my OnStart event.... objEventLog.EnableRaisingEvents = Tru ...It starts fin I have the same issue when stopping the service because of below line of code in my OnStop even objEventLog.EnableRaisingEvents = Fals I am using .NET 2003 and I have declared objEventLog as.. Friend WithEvents objEventLog As System.Diagnostics.EventLo Does anyone have any idea as to why this is causing an issue when starting and stopping the service Thanks C Tag: TreeView and ObjectDisposedException Tag: 67391
  - 8
    - PropertyGrid in UserControl doesn't reflect changes to displayed class Hello. I have a propertygrid in a usercontrol which I have placed on a form. I assign a class to this property grid in the control's constructor and it displays the properties of my class with no problem. I then invoke a method on the control which updates the class displayed in the propertygrid. When I either refresh or reassign to SelectedObject, the propertygrid fails to show any change in the underlying class. My apologies if this has been covered before - I did do search, but failed to find any posts for it (or failed to recognise them if I did :) Thanks, John Tag: TreeView and ObjectDisposedException Tag: 67388
  - 9
    - XML and schema how do i validate a xml file with a schema using VB.net or C#? thanks Tag: TreeView and ObjectDisposedException Tag: 67383
  - 10
    - Problem painting Linear Gradient onto WinForm I'm trying to create a WinForm with a Linear Gradient background. That's easy enough, but any Labels I have on the form do not have their background painted correctly. Even though I have Label.BackColor set to Color.Transparent, it is using the original BackColor of the Form. Here is my code, which is called in the Paint event for the Form ... private void LoginForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { LinearGradientBrush brush = new LinearGradientBrush( this.ClientRectangle, Color.Black, Color.Blue, LinearGradientMode.Vertical); e.Graphics.FillRectangle(brush, this.ClientRectangle); } Am I going to have to override the Paint event for the Label components as well and manually output the text? -- Cheers, David Clegg dclegg_at_ebetonline_dot_com "Where's the 'Any' Key?" - Homer Simpson Tag: TreeView and ObjectDisposedException Tag: 67378
  - 11
    - Problem painting WinForm with Linear Gradient background I'm trying to create a form with a Linear Gradient background. Thats easy enough, but any Labels I have on the form do not have their background painted correctly. Even though I have Label.BackColor set to Color.Transparent, it is using the original BackColor of the Form. Here is my code, which is called in the Paint event for the Form ... private void LoginForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { LinearGradientBrush brush = new LinearGradientBrush( e.ClipRectangle, Color.Black, Color.Blue, LinearGradientMode.Vertical); e.Graphics.FillRectangle(brush, this.ClientRectangle); } Am I going to have to override the Paint event for the Label components as well and manually output the text? -- Cheers, David Clegg dclegg_at_ebetonline_dot_com "I know I'm not usually a praying man, but if you're up there, please Superman, help me!" - Homer Simpson Tag: TreeView and ObjectDisposedException Tag: 67375
  - 12
    - Assigning Icons to Forms As always, I am asking a stupid question 1) Creating a Direct3D graphic program 2) Create my Direct3D scree 3) I want that screen to have an icon (note that I create form through code) 4) Me.Text="Title of my screen" : ' Works 4) Me.Icon ???? What would be the command here Thank you Tag: TreeView and ObjectDisposedException Tag: 67365
  - 13
    - show files from database hello ng, is there a way to show a file from a database (example pdf-file), without saving the file first on hard disk? thanxs simon g. Tag: TreeView and ObjectDisposedException Tag: 67361
  - 14
    - .NET application does not release Excel Let me prefix with, I've done many VB6 and ASP applications that read from/write to Excel and have never had a problem. I'm not a beginner at this... I have created my first .NET Windows application that reads from Excel 2000 and writes to a tab file. I am using the code below and when stepping through the appExcel.Quit() is executed. However, the EXCEL.EXE process still runs and will run until I close the .NET application I've built. This happens in both DEBUG and RELEASE compilations. Try appExcel = New Excel.Application() ... coding tasks ... Catch ex As Exception ... error tasks ... Finally appExcel.Quit() Any ideas why Excel is not being released after the quit? I even tried adding GC.Collect() to see if it helps to force the Garbage Collection to release appExcel. Thanks, in advance. Tag: TreeView and ObjectDisposedException Tag: 67360
  - 15
    - system keys I am creating a control, based on TextBox. How do I filter DEL and other system keys Now I do it by trapping WM_KEYDOWN in WndProc override, but is not there a .NET way Thank you Tag: TreeView and ObjectDisposedException Tag: 67359
  - 16
    - Problems implementing No Touch deployment I have a WinForms app that I built a .NET setup routine and distributed on various clients. Now i want to be able to distrbute updates via "No Touch" deployment. I read Chris Sells article on "No Touch", and I setup an internal website to test. When I drop the assemblies in the web and then point to the exe via a URL I get the following: CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: There must be something i am missing. First off if I originally installed this app via a disk how does it know where to put the assemblies, if I point to an EXE does it know about other assemblies? Also how can I get this to run in the background without manually entering in a URL in a browser. P.S. I can run the EXE via the URL from my local dev machine. Tag: TreeView and ObjectDisposedException Tag: 67357
  - 17
    - Datagrid - what column is it sorted by? How do I determine what column the user sorted the textbox by and wether its ASC or DESC? (they click the header and a little arrow shows up. When they leave the form, I want to pick up what column they sorted by so when they come back, I can sort that column for them I already have the filter piece on the dataview and move to the row they were on by useing Me.DataGrid1.CurrentRowIndex = x. Please help. I have spent hours trying to figure this out Thanks very much for your time. Tag: TreeView and ObjectDisposedException Tag: 67356
  - 18
    - Push-button in a DataGrid I would like to put a push-button in a data grid (normal windows button). What I did is to derive from DataGridTextBoxColumn, create the button in the constructor and set it's parent to be the textbox. It shows up perfectly well when I click the textbox, but when I click any other cell, it disappears, and the idea is for all buttons in the column be visible at all times. Thanks. Tag: TreeView and ObjectDisposedException Tag: 67355
  - 19
    - Overflow error when drawing a form with a Windows XP theme enabled I have written an Excel Plug-in (COM) for Office 2000 and 2002, which adds a toolbar. When a button on the toolbar is pressed, a dialogue box (.NET Form) appears, with several tabs, tree views, lists, combo boxes, etc (all standard .NET controls). Sometimes, while pressing buttons or interacting with the controls, an unhandled exception message appears due to an "Overflow error", with the information below. It appears in different places each time, and the control that was drawing at the time is replaced with a red "X" on a white background. I have searched the internet for any suggestions, but can't find anything that suggests what could be causing the problem. The only lead I have is that it seems to happen with Windows XP themes are enabled, but doesn't happen if the default "teletubbies" theme is used. Do you have any suggestions about how to fix this problem, or even what the error means? Thanks, Aaron Queenan. ----- See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.OverflowException: Overflow error. at System.Drawing.Graphics.CheckErrorStatus(Int32 status) at System.Drawing.Graphics.DrawString(String s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format) at System.Windows.Forms.ControlPaint.DrawStringDisabled(Graphics graphics, String s, Font font, Color color, RectangleF layoutRectangle, StringFormat format) at System.Windows.Forms.GroupBox.OnPaint(PaintEventArgs e) at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.GroupBox.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/microsoft.net/framework/v1.1.4322/mscorlib.dll ---------------------------------------- System Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll ---------------------------------------- Extensibility Assembly Version: 7.0.3300.0 Win32 Version: 7.00.9466 CodeBase: file:///E:/MKVIEW/SNAPPER/Excell_Plugin/Bin/Extensibility.DLL ---------------------------------------- System.Drawing Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll ---------------------------------------- System.Windows.Forms Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll ---------------------------------------- CustomMarshalers Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/custommarshalers/1.0.5000.0__b03f5f7f11d50a3a/custommarshalers.dll ---------------------------------------- <snip> ---------------------------------------- ************** JIT Debugging ************** To enable just in time (JIT) debugging, the config file for this application or machine (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration> <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the machine rather than being handled by this dialog. Tag: TreeView and ObjectDisposedException Tag: 67353
  - 20
    - Problem with showing/hiding forms I'm trying to convert my VB6 app to VB.NET and having loads of difficulty getting some forms to show correctly. I have seen similiar type of posts as mine, but nothing has worked for me I have an MDI container form(frmICD) and a Sub Main where the app first starts up. When I first run the app, frmlogon gets called from Sub Main to get the username and password. Once the user hits ok, code in frmlogon gets the next form (frmmainmenu) ready. I have verified via debugger that frmmainmenu is visible. I call frmlogon.hide, the app returns to the Sub Main and the program terminates. Is there a reason this is happening or What am I missing I tried to add this line of code in frmlogon: 'System.Windows.Forms.Application.Run(New frmMainMenu)' but I receive this error message: 'It is invalid to start a second message loop on a single thread'. I'm assuming I get this because frmmainmenu is already visible? I don't know. If anyone can help or can tell me somewhere that has good examples of working with MDI forms and childs, it would be greatly appreciated Joe Tag: TreeView and ObjectDisposedException Tag: 67351
  - 21
    - Drawing.dll "The object is currently in use elsewhere" I have an app which makes a number of calls to Drawing.DLL. It seems to crash at random points during program execution. No matter how I try to surround every call with try / catch blocks I simply cannot pinpoint the error. The debugger takes me into the DLL's assembler code. This indefinite use of the definite article "the object" is a common MS figure of speech. Does anyone have any idea which object it could be that's in use and what the problem might be ? Bob Tag: TreeView and ObjectDisposedException Tag: 67350
  - 22
    - window: Always in front / always on top Hello, i'm building an application and i want my window to always be on top. The perfect example off this is the windows task manager. I've translated dutch back into english, so i don't know if it's the exact translation: In the menu options the first menu option is "Always in front". Does anyone know the code for that in c#.NET? (the window should NOT get the focus though) Thanks in advance. Jeroen Pot Tag: TreeView and ObjectDisposedException Tag: 67348
  - 23
    - Bug in PrintPreviewDialog? I had a devil of a time setting the Icon for a class I made that inherits from PrintPreviewDialog. I noticed that someone else (post is in microsoft.public.dotnet.languages.csharp) had this same question. I created a new dialog: public class WindowsPrintPreviewDialogExtended : System.Windows.Forms.PrintPreviewDialog When I bring this class up in Visual Studio in designer mode, it has almost no properties. Just Document, UseAntiAlias, (DynamicProperties), (Name), DrawGrid, GridSize, Locked, SnapToGrid, Language, and Localizable. Many of the properties available for other forms, in particular the whole WindowStyle group, don't show up. Furthermore, when looking at code, typing "this." shows the Intellisense list for the class, which is just as sparse. There seems no way to set the icon. However, if you do the following, you can set it by hand: 1. Add "using System.Globalization;" to your code. 2. At the start of your constructor, add: System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(<yourClassName>)); where <yourClassName> is the name of your class. 3. After "InitializeComponent();" add: this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon"))); Never mind that Intellisense doesn't recognize "Icon" as a valid property. In this case (for some reason) Intellisense isn't very intelligent. 4. Create a normal, vanilla Form in your project. Set the icon in that form. Now open the form's .resx file in Visual Studio. Switch to .XML mode. At the bottom of the file you will see a <data> tag with the name "$this.Icon". Copy this entire tag (down to and including </data>) onto the clipboard. 5. Open the .resx file for your print preview dialog in Visual Studio. Switch to XML mode. Paste the <data> tag and all of its contents to the end of the file, just before the </root> closing tag. 6. Delete the vanilla form that you added to your project. This will set the icon for your print preview dialog. Does anyone have any idea why PrintPreviewDialog would act like this? Does anyone know why, in the .NET documentation, PrintPreviewDialog is listed as having no Icon property under "list all members", even though its parent class, "System.Windows.Forms.Form", according to the same documentation, has a public Icon property? (And in .NET it's impossible to obscure properties of parent classes.) To add to the mystery, there is documentation for a PrintPreviewDialog.Icon property (oddly inaccessible from the documentation for PrintPreviewDialog), that claims that "This member supports the .NET Framework infrastructure and is not intended to be used directly from your code." You can see it here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemWindowsFormsPrintPreviewDialogClassIconTopic.asp Curiouser and curiouser. Tag: TreeView and ObjectDisposedException Tag: 67347
  - 24
    - empty or null in combobox Hello how do i this: In a form there is a combobox. The combobox is bound to a lookuptable. What i have to do, that a empty oder null value could be choosen, but the empty/null value isn't in the lookup table. Thank you Matthias Tag: TreeView and ObjectDisposedException Tag: 67344
  - 25
    - Binding textboxes to dataset relationship I have 2 textboxes. Each show a field from a different table (2 tables). The dataset has a relationship defined. I want my navigation button to navigate through the records. So that when the record in one table is selected, the textboxes bound to the other table change accordingly Also, there might not be a relationship associated between the tables for certain records any ideas? Tag: TreeView and ObjectDisposedException Tag: 67341

Hi All!

I have an application that opens form with TreeView.
I want to close form by AfterSelect Event:

private void MyTreeView_AfterSelect(object sender,
System.Windows.Forms.TreeViewEventArgs e)
{
this.Close();
}

But everytime when I clicking on TreeView Item,
I get following error:

An unhandled exception of type 'System.ObjectDisposedException' occurred in
system.windows.forms.dll
Additional information: Cannot access a disposed object named "TreeView".

Any ideas?

Thank you,
Vitaly Sedov

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