PropertyList Control

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- Previous
  - 1
    - protect my code from decompile hi. how to protect my vb.net application , from decompile ? all the tips , softwares, we be nice to read about. thanks and have a nice day. Tag: PropertyList Control Tag: 52121
  - 2
    - How to do dockable form in MDI? How do I create a dockable windows form within an MDI parent? The behavior is similar to the IDE interface, with mdi child windows in the center and property windows docked to the right. I want to create a property window that is either floating or docked to one side of the MDI parent. Tag: PropertyList Control Tag: 52120
  - 3
    - Controling C# Forms in Windows Application I'm a web applications developer and I'm being asked to write this windows application so I'm sure this is an easy answer but It's not jumping out at me. I have an application that uses several forms in a single windows application. I need to be have the user click a button and have it bring up a different form. These forms aren't generated on the fly they are hardcoded. For example the entry point of the application has a welcome menu with a login. If the user is a new user they need to fill out a account form. This form is located on a seperate windows form then the login / welcome menu. Thanks in Advance for all help and suggestions Braden Bowers Tag: PropertyList Control Tag: 52118
  - 4
    - Controling C# Forms in Windows Application I'm a web applications developer and I'm being asked to write this windows application so I'm sure this is an easy answer but It's not jumping out at me. I have an application that uses several forms in a single windows application. I need to be have the user click a button and have it bring up a different form. These forms aren't generated on the fly they are hardcoded. For example the entry point of the application has a welcome menu with a login. If the user is a new user they need to fill out a account form. This form is located on a seperate windows form then the login / welcome menu. Thanks in Advance for all help and suggestions Braden Bowers Tag: PropertyList Control Tag: 52117
  - 5
    - Strange Issue with MDI childs and Merged menus. Have a MDI parent with a menu and a MDI child with a menu that gets added to the parent - nothing fancy. One the parent, there is a menu (file/new) item that loads and shows a new child. Works fine so far. However, if you click (file/new) 2 or 3rd times, without actually clicking on the new child first, I will get: "An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll Additional information: Object reference not set to an instance of an object." However, if I click inside the ListView in the first child (I think because it changes the focus off the menu) then I can continue creating children without this error. You must *actually click the control as setting the focus in the code does not stop the problem. This does not happen if I remove the menu from the child or if I do not start the child as MDI. Therefore, I am guessing it is an issue with merged menus and/or mdi children. Anyone run into this before? Is there a way to simulate the mouse click in code (i.e. not just setting the focus). --wjs Tag: PropertyList Control Tag: 52115
  - 6
    - how to display multiple image on a windows form... hiye people... how can i display multiple image on a windows form? my image will be from a folder somewhere on the local machine. whats the best method to display multiple image? yours truly simon Tag: PropertyList Control Tag: 52109
  - 7
    - Intercepting events Hello all, I have a form with several controls(buttons) on it. I want to start a screen saver after nothing has been pressed for 10 min. And of course if something has been pressed, to restart the timer. To to this I have to trap each control's Click event and restart the timer from there. Is there a way to do this only once, somehow to hook before each control's Click event or something sismilar? Is there a way the form to intercept an event going one of its controls? Thank you Tag: PropertyList Control Tag: 52104
  - 8
    - Intercepting events Hello all, I have a form with several controls(buttons) on it. I want to start a screen saver after nothing has been pressed for 10 min. And of course if something has been pressed, to restart the timer. To to this I have to trap each control's Click event and restart the timer from there. Is there a way to do this only once, somehow to hook before each control's Click event or something sismilar? Is there a way the form to intercept an event going one of its controls? Thank you Tag: PropertyList Control Tag: 52103
  - 9
    - Windows Forms Inheritance, Incomplete? I was playing around with Windows Forms and found out this Forms Inheritance feature. The moment I saw that, I felt this can be used effectively if the application contains couople of forms which have a consistant look and also shares SOME similar functionality between the forms. Lets say for example, I have 2 forms and both forms have buttons as (New, Edit, Save, Close) Both the forms before showing, should do a security check(say in forms load event) In the old vb scenerio, we would create 2 similar forms seperately and do code cut and paste for each form which have the similar functions. But here, with forms inheritance this should be automaticaly done. But what happense when u inherit a form at the moment is, it only sets the controls MODIFIER poperty to say Protected, Proteted Internal etc.. But If I want to override the parent forms functionality , say overriding CLOSE buttons click method, I have to manually edit the parents click event as; protected virtual void btnClose_Click(object sender, System.EventArgs e) and then edit the close button event in the child form to; protected override void btnClose_Click(object sender, System.EventArgs e) And then, in the child forms' event registration for CLOSE button should be removed/commented(the line below). //this.btnClose.Click += new System.EventHandler(this.btnNew_Click); Otherwise, when the child instance get created it will register 2 events(cause it goes up the inheritance hierachy and creates parent form instance first and then come back to child form) so if u click CLOSE button once, it will call the close method twise!!!!! My question is why they didn't automate this couple of steps ? If a forms controls have been set to Protected / Protected Internal, they could have generate the code so that it will really work. I want to know what you guys think. May be I have taken the whole thing from the wrong end. May be forms inheritance is there ONLY to get the UI duplicated? is it? Regards KK Tag: PropertyList Control Tag: 52098
  - 10
    - Bug in datatable.select If you use a datatable select on a column that contains a GUID you will have a major problem if you are not using US language. We are using Danish language and when selecting like this: ds.Tables(0).Select(GuidColumn = 'SomeGUID') It will not always return the row as expected, I suspect the problem is that in Denmark the character "å" is the same as "aa" and one side of the equation returns "å" while the other returns "aa". This is a serious bug and should be fixed ASAP - I have reported this to MS 6 months ago, but to no avail. For anyone interested I can send a project that demonstrates this behaviour. Regards Thorben Jensen Tag: PropertyList Control Tag: 52093
  - 11
    - What is the best method to display multiple data hiye good people of devCity, I'm new to the .net world. i've recently been assign a task to display multiple data ON A WINDOWS FORM. if this task were to be completed in asp.net i would use datagrid and all its wonderful feature to customize the output of it. but sadly, i'm not... anyway, since my app would be in a windows form, do i still need to use datagrid to display multiple rows of data or is there a better tool out there and i'm not aware of it? and if i were to stuck with datagrid, can someone show me some sites on the net on how to customize the datagrid the way asp.net does? your help is greatly appriciated... yours truly Simon Tag: PropertyList Control Tag: 52092
  - 12
    - Quote extraction from Yahoo Historical Quotes I have the following method that retrieves quotes from the Yahoo historical quotes web page. According to their FAQ, there is no limitation on the number of quotes one may download, and because the problem seems to come and go, I'm concerned it may be a problem with my code. In particular, the problem seems to occur when I retrieve quotes over a long period of time. Normally the routine runs every night and downloads the previous days quotes. Occasionally, however, I'll download one or more years worth of quotes for several stocks. It's on these occasions when the code seems to fail. It doesn't fail the first time, though, and it won't necessarily fail on the stock that I'm retrieving multiple quotes from. The exception that is thrown is: "System.Net.WebException: The underlying connection was closed: The server committed an HTTP protocol violation." The exception is thrown at wrq.GetResponse(). I originally thought it was because I was going through a machine using Internet Connection Sharing, but then I did it directly to the internet without a proxy, and the same problem occurred. Anyone have any ideas? Code follows: public QuoteList GetQuoteHistory(Stock StockOb, DateTime StartDate, DateTime EndDate) { if (StartDate.Year < 1970) { StartDate = new DateTime(1997, 1, 1); } bool done = false; int tryCount = 0; QuoteList list = new QuoteList(); while (!done) { // Build url query string string url = @"http://" + yahooIP + @"/table.csv?a=" + ((int)(StartDate.Month - 1)).ToString() + @"&b=" + StartDate.Day.ToString() + @"&c=" + StartDate.Year.ToString() + @"&d=" + ((int)(EndDate.Month - 1)).ToString() + @"&e=" + EndDate.Day.ToString() + @"&f=" + EndDate.Year.ToString() + @"&s=" + StockOb.Ticker + @"&y=0&g=d&ignore=.csv"; WebRequest wrq = null; Stream strm = null; StreamReader sr = null; try { wrq = WebRequest.Create(url); wrq.Timeout = 30000; wrq.Proxy = WebProxy.GetDefaultProxy(); strm = wrq.GetResponse().GetResponseStream(); sr = new StreamReader(strm); } catch(System.Exception ex) { if (null != sr) { sr.Close(); } if (null != strm) { strm.Close(); } // Check to see if the operation timed out. If it did, // retry a couple of times. if ("The operation has timed-out." == ex.Message) { tryCount++; if (tryCount > 2) { return null; } continue; } else { return null; } } string line; try { // If there's no day, close out. if (null == (line = sr.ReadLine())) { return null; } while (null != (line = sr.ReadLine())) { // Parse quote data nad add the quote if it's not already in the // list of quotes char[] splitCh = new Char[1]; splitCh[0] = ','; string[] items = line.Split(splitCh); Quote quote = new Quote(); quote.QuoteDate = Convert.ToDateTime(items[0]); quote.OpenPrice = (float)Convert.ToDouble(items[1]); quote.HighPrice = (float)Convert.ToDouble(items[2]); quote.LowPrice = (float)Convert.ToDouble(items[3]); quote.ClosePrice = (float)Convert.ToDouble(items[4]); quote.Volume = Convert.ToInt32(items[5]); if (false == list.ContainsKey(quote.QuoteDate)) { list.Add(quote.QuoteDate, quote); } } } catch(System.Exception ex) { Trace.WriteLine("Unknown exception processing request: " + ex.ToString()); } finally { // Close everything nice and clean sr.Close(); strm.Close(); done = true; } } return list; } Tag: PropertyList Control Tag: 52090
  - 13
    - TreeView with adjustable TreeNode height Hi, Does anyone know a third party TreeView control with the possibility to adjust (programmatically) independently the heights of the TreeNodes? i.e. sort of multiline TreeNode. (Or would it be feasible to construct such one by yourself inheriting from the .NET TreeNode class?) Ron Tag: PropertyList Control Tag: 52089
  - 14
    - mdi scrollbars - now tearing my hair out! Hi all! Original question:- Is it possible to disable the scrollbars that appear on an MDI parent form, so when the child forms are dragged outside the forms client area the scroll bars do not show! ---------------- Still can't seem to find any info on how this is done! Searched everywhere on the net tried EnableScrollBar and ShowScrollBar, so please can anyone help with this almost impossible problem! Thanks in advance, Carl Prentice. Tag: PropertyList Control Tag: 52088
  - 15
    - About the samples in MSDN TV Data Validation in Smart Client Applications I'm a regulary watcher of MSDN TV. I recently watched the episode Data Validation in Smart Client Applications. I'm very interested in one of samples - the validation sample. I'm very surprised that when a validation component is added onto the form, it dinaymically adds new properties to a TextBox control! I went to the site mentioned in the show, but the samples are not there (I got the ever existing 404 error). Can someone tell me that is the key technique to dynamically add properties to a control on a form? Tag: PropertyList Control Tag: 52085
  - 16
    - problem with form1.show If I use the command form1.showdialog() the form appears and stays on the screen. However, if I use form1.show() it appears then immediately closes. I've spent two hours pulling my hair out on this one, thumbing through 3 vb.net books. For now I'm using showdialog, but I need the 'real thing'. Thanks in advance. dennist Tag: PropertyList Control Tag: 52080
  - 17
    - Icon's size problem Hi! I've copied some ico file; on this copy I've worked under VS to graphicaly modiffy icon; the result is that I can only change picture of the max-res icon. Problem - how to convert this "big" to other sizes? Is there any soft under VS (or other) that can make this conversion? Thx in advance KW. Tag: PropertyList Control Tag: 52075
  - 18
    - Thanks all - Suggestions for Disable Ctl+Alt+Del C# Dear Friends Thanks for all your suggestions. Brain Thank you for your source code and valuable suggestions.I am working on it... Thanks, Dev Tag: PropertyList Control Tag: 52058
  - 19
    - How many threads Hi, If I have a code like this: class Foo { public Form1 frm1; public Form2 frm2; public static void Main() { frm1=new Form1();frm2=new Form2() Application.Run(frm1); } } How many threads will I have in my process (excluding the CLR's ones)? Does creation of a form create a thread, too? I think it does because where else the forms' message loops will reside, but I am not sure Thank you Tag: PropertyList Control Tag: 52057
  - 20
    - Strange TextBox behavior when 2 or more text boxes are placed next to each other. We have several forms that use textBoxes to collect info from the user. It seems that when we have 2 text boxes stacked one below the other, when the user types in the second one the text is actually entered into the first one. We thought that maybe upgrading to .NET 1.1 might solve this issue, but it is still there. Tag: PropertyList Control Tag: 52040
  - 21
    - form with datagrid steals focus Hi. I'm having a very annoying focus problem. I have a class (MyDataList) which implements CollectionBase and IBindingList. This class is bound to a data grid. whenever my MyDataList is updated [example: OnListChanged(new ListChangedEventArgs(ListChangedType.Reset,-1));] (another thread invokes updates on the UI thread) the form containing the DataGrid takes focus and then acts like something set TopMost = true on the containing form! I can't figure out what is causing this, and it's driving me insane!! Has anyone encountered this before, and found a fix? Or does anyone have a suggestion? (extend DataGrid and override some protected event?) Tag: PropertyList Control Tag: 52038
  - 22
    - Dropdown Grid Have anyone seen or implemented a control that drops a grid out of dropdown list box? Tag: PropertyList Control Tag: 52024
  - 23
    - Visual Inheritance for ComboBox Hi All, Just been toying around with inheriting from the ComboBox control. See below a simple example of the new ComboBox class. // start MyComboBox.cs file using System; using System.Windows; using System.Windows.Forms; using System.Drawing; namespace MyComboBox.UI { /// <summary> /// Summary description for MyComboBox. /// </summary> public class MyComboBox : ComboBox { public MyComboBox() { this.ForeColor = Color.DarkBlue; } protected override void OnHandleCreated(EventArgs e) { if (this.DesignMode) { this.Items.Add("Design Mode"); } else { this.Items.Add("Run-time Mode"); } this.Items.Add("Orange"); this.Items.Add("Apple"); this.Items.Add("Pie"); } } } // end There's no problem adding the control to my toolbox. Also - no problem dragging and dropping the custom combo onto the design canvas. Strange thing is, after switching between design time and code a couple of times and running it - the font seems to change into a bigger font, something like Arial bold or such. Also, I suppose I need to specify some attribute tags before the class definition. Any ideas or suggestions? Thanks a bunch, Wim Hollebrandse Tag: PropertyList Control Tag: 52023
  - 24
    - Menu shortcut keys do not work when Form.Show is called. I have a form that I build in C# that does not seem to annunciate a menu item selection when a shortcut key is pressed. It only seems to occur if I display the form using the Form.Show() method. The problem does not seem to occur when I use Form.ShowDialog(). Can someone explain how I can get around this problem? -- ----------------------------------- Ken Varn Senior Software Engineer Diebold Inc. varnk@diebold.com ----------------------------------- Tag: PropertyList Control Tag: 52012
  - 25
    - MDIChild forms maximizebox. Hello ALL, I have this situation: 1. A MDI Form named frmPrincipal; 2. A MDIChild form named frmCustomers; When I show the frmCustomers form, from a click event of a button of frmPrincipal, like this: frmCustomers.MdiParent = this; frmCustomers.WindowState = FormWindowState.Maximized; frmCustomers.Show() The frmCustomers form shows ok, but the minimizebox, maximizebox and controlbox appears, and I can´t like this. In the frmCustomers properties I set false to maximizebox, controlbox and minimizebox, but they appears yet. I try to remove the border of the form (set FormBorderStyle = None) but don´t work too. Please, how can I hide this buttons? Thanks in advance and sorry my English. Fernando Lopes Marília - São Paulo - Brazil. Tag: PropertyList Control Tag: 52009
- Next
  - 1
    - Problem with drawing over the top of a background form Hi, I am hoping someone can point me in the right direction. I am working on a program that has a form that has a background mage that the user can change. Currently I assign in directly to background image. After an image is assigned to the background the user has the ability to draw rectangles on the image using the mouse to define the regions. To do that I create a bitmap and constantly redraw the rectangles on it that are stored in a linked list each time the form repaints.. the problem is that because of this bitmap, I never see the image assigned to the background. Of course this makes sense since I am creating a bitmap. I've tried setting the bitmap to be transparent, and that allows me see the background image, but everytime I use the mouse to draw or resize a region, it doesn't refresh properly and I'm left with tons of rectangles on the screen, instead of just the final rectangles position. Is there any easier way to do this? I've also tried to assigned the .BMP image I use directly as the bitmap I am creating the rectangles on rather then the background, but then I get another error saying "Additional information: A Graphics object cannot be created from an image that has an indexed pixel format." The bmp is an 8 Bit format image. I've also tried converting it to a GIf with no success. I was going to post some of the code, but figured the post was long enough, if anyone is interetsed in seeing what i have so far, just let me know. I appreciate any help you guys can give me. Tag: PropertyList Control Tag: 52006
  - 2
    - Simple way to force a form to validate Is there a simple way to force a form to invoke validation on all its controls.. I want to do this on a button_click prior to doing some processing.. Thanks Tag: PropertyList Control Tag: 52005
  - 3
    - HOWTO: Remove the left indicator column of a datagrid? Hello ALL, Please, is there any way to remove the indicator column (that´s in the left) of a datagrid in windows forms? Thanks for help. []s Fernando Lopes Marília - São Paulo - Brazil Tag: PropertyList Control Tag: 52002
  - 4
    - Pointing to custom forms When we create a new win usercontrol project(any type of project really), IDE creates a default usercontrol form for us. Is there a way to set IDE so that instead of this default form, It creates a custom form? thanks Tag: PropertyList Control Tag: 51992
  - 5
    - Am I doing something wrong? (Variables) Hiya all, I am developing a windows form application. I am coding in C#. What I have is two forms/Classes, frmMain & frmAdd and they both have the same default namespace "Q.A._Testing_Centre". In frmMain I have initialize & instantiated my variable as "public string userName", where the user input name is stored. I am trying to get the stored data propertied from my frmMain to my frmAdd. I thought this is the correct syntex for outputting the info in my textbox (scratching my head), maybe it's not. So please let me know if you can help, or where I'm going wrong. Code is as follows: namespace Q.A._Testing_Centre { public class frmMain : System.Windows.Forms.Form { public string userName; <<<---- I want the data from here ... ... ... namespace Q.A._Testing_Centre { public class frmAdd : System.Windows.Forms.Form { private void SubMainMenu() { frmMain Main = new frmMain(); txtBoxSample.Text = Convert.ToString(Main.userName);<<<--- to output in my textbox here ... ... ... I have tried a sample textbox with in frmMain and this data is in fact stored until I exit my program. But I cannot seem to reproduce the same textbox output in frmAdd. I seem to get a blank textbox area. Alternatively I have try "txtBoxSample.Text = Main.userName" syntex which does not work as well. Or maybe if someone has a better alternative, please feel free to let me know. All help is truly appreciated & thank you all in advance. MikeY Tag: PropertyList Control Tag: 51989
  - 6
    - Searching for folder Zip/Unzip utility. I have tried alot in searching for API to make an utility for zipping and unzipping the folders in vb.NET. If any one has the idea to create this utility by using .net framework please let me know. regards sandy Tag: PropertyList Control Tag: 51982
  - 7
    - list of mdi children in a submenu of mdiparent Hello, I would like to have a list of mdi children in a submenu of mdiparent. the list should be refreshed dynamically when mdi children are created and destroyed. mdi child should be activated when the user clicks the menu item. I have some results but I am not satisfied (deep problems with MdiChildActivate). Maybe there's an article or an example on how to do that? Regards, Wiktor Tag: PropertyList Control Tag: 51981
  - 8
    - Component Errors I am Intermediate VB Programmer. I develop an application recently which I intend install on a server network. But when I was testing software on the server, I encountered a problem(ie when I tried to load the application on the network from one of the client comptuer (work-station). It was complaining of Some components either missing or not properly registered. And these were some of the component I used for the program such as MSAdodc.Ocx... Inshort,some most of the activeX component that I used. Apart from developing a server and Client Application,is there no other ways that can make this applicatio work properly for me while application is on server system and been accessed from the client computer? I will be very grateful and thankful, if I can get the solution right away. Thanks Tag: PropertyList Control Tag: 51976
  - 9
    - Disable Ctl+Alt+Del C# Dear Friends, How to disable the start,windows task manager,Ctl+Alt+Del buttons through C#?, If any one knows please let me know...Any suggestions would be greatly appreciated. Thanks, Dev Tag: PropertyList Control Tag: 51975
  - 10
    - DateTimePicker BackColor Property Hi, for those of you, who need a backcolored DateTimePicker control: this ist my implementation of the BackColor property for the standard DateTimePicker Control (which does not work): public class MyDateTimePicker : DateTimePicker { #region internal set backcolor hack private Color _BackColor = SystemColors.Window; public override Color BackColor { get { return _BackColor; } set { _BackColor = value; Invalidate(); } } protected override void WndProc(ref Message m) { if (m.Msg == (int) 0x0014 /* WM_ERASEBKGND */) { Graphics g = Graphics.FromHdc(m.WParam); g.FillRectangle(new SolidBrush(_BackColor), ClientRectangle); g.Dispose(); return; } base.WndProc(ref m); } #endregion } ... seems to work quite well. claudio Tag: PropertyList Control Tag: 51969
  - 11
    - Double Click on TreeView Hi all, I wanted to know if a node in tree view is double clicked, I tried clicks property on MouseDown but it always returns 1. any solutions for this problem regards, ... Tag: PropertyList Control Tag: 51966
  - 12
    - Why this does not work? Hi: This is a little program. It has a thread that calls trough Invoke to a method called Draw. The Draw method draw elements within the Panel control. For some reason, the program does not close sometimes. Please semd me comments about this. Thanks! Juan C. Olivares // project created on 11-07-2003 at 0:31 using System; using System.Drawing; using System.Threading; using System.Windows.Forms; namespace MyFormProject { delegate void DelegateCallDraw (); class MainForm : System.Windows.Forms.Form { private System.Windows.Forms.Panel panel; private DelegateCallDraw CallDraw; public MainForm() { InitializeComponent(); panel.AutoScroll = true; // Add controls this.Draw (); // Create delegate CallDraw = new DelegateCallDraw (Draw); // StartThread Thread thread = new Thread (new ThreadStart (StartTimer)); thread.Start (); } // This method is used in the forms designer. // Change this method on you own risk void InitializeComponent() { this.panel = new System.Windows.Forms.Panel(); this.SuspendLayout(); // // panel // this.panel.Location = new System.Drawing.Point(16, 16); this.panel.Name = "panel"; this.panel.Size = new System.Drawing.Size(264, 128); this.panel.TabIndex = 0; // // MainForm // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 161); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.panel}); this.Name = "MainForm"; this.Text = "This is my form"; this.ResumeLayout(false); } private void Draw () { panel.Controls.Clear (); panel.SuspendLayout (); for (int i = 1; i <= 20; i++) { TextBox tb = new TextBox (); tb.Text = i.ToString (); tb.Location = new Point (0, (i - 1) * tb.Height); panel.Controls.Add (tb); } panel.ResumeLayout (); } private void StartTimer () { while (true) { // Sleep 10 secs Thread.Sleep (1000 * 10); // Call draw this.Invoke (this.CallDraw); } } [STAThread] public static void Main(string[] args) { Application.Run(new MainForm()); } } } Tag: PropertyList Control Tag: 51964
  - 13
    - Assign Property To ErrorProvider I added an Error Provider to a VB.Net windows form called Err1. When I add a text box to the form, I get a property called "Error on Err1" because I added the Error Provider. How can I access this property in code to set a value to it? Derek Tag: PropertyList Control Tag: 51954
  - 14
    - ContextMenu will not close after mouse click When the ContextMenu is associated to a control(Panel, Button...) on a Windows Form, ContextMenu.Show() can popup the menu. But the menu stays open after mouse click. It worked perfectly on the form itself. Any Idea? Tag: PropertyList Control Tag: 51941
  - 15
    - Is print preview in .NET wothwhile? Hi! I am preparing to write a small library for generating reports. One of the key features is that it must support print previews. .NET has a PreviewPrintControler but according to the docs it is keeping the whole preview in Images. The library should be able to preview quite large reports (over 100 pages) also on resource starving computers (like 64 MB RAM 300 Mhz Celerons). Would PrintPreview eat the whole memory available or does it have some optimizations to counter the problem? What are your experiences? Regards! Micha³ Ziemski Tag: PropertyList Control Tag: 51940
  - 16
    - Odd problem with InputBox hey all, I am having an odd problem with the InputBox in VB.NET, and it ONLY happens on one of my computers. When I try "Dim x as String = InputBox("TESTPROMPT"), I get the following error: ---------------------------------------------------------------------------- ---- [Exception Details] ---------------------------------------------------------------------------- ---- System.ComponentModel.Win32Exception: Class already exists at Microsoft.VisualBasic.CompilerServices.LateBinding.LateGet(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack) at NexGen.Environment.RaiseSpecialEvent(String& strAction, Object& objSender) in Z:\Source Code\Presentation Tier\VB.NET\NexGen.Environment\Environment.vb:line 73 at AMC.frmMain.frmMain_Load(Object sender, EventArgs e) in Z:\Source Code\Presentation Tier\VB.NET\NexGen.AMC\frmMain.vb:line 2517 at System.Windows.Forms.Form.OnLoad(EventArgs e) at System.Windows.Forms.Form.OnCreateControl() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.Form.WmShowWindow(Message& m) at System.Windows.Forms.Form.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) any ideas? TIA Nick Jacobsen njacobsen@pfastship.com Tag: PropertyList Control Tag: 51932
  - 17
    - Datagrid.Backgroundimage propertry (VB.NET) How can I show an image in the background of the datagrid? the Backgroundimage property has no effect.... tnx! bill Tag: PropertyList Control Tag: 51931
  - 18
    - Having Property Grid Display Properties from the Most Derived Class I would like to use the PropertyGrid control to allow users to edit the properties of a control, however, I would like only the properties of the most derived several classes to be visible. How is this possible? -- Howard Swope Software Engineer Spitz, Inc [http://www.spitzinc.com] Tag: PropertyList Control Tag: 51928
  - 19
    - Possible ToolBar bug The following Form-derived class illustrates a problem I am having when a ToolBar is instanced at the bottom of a Form with a simple Panel at the top. When this form is minimized and then restored, the layout logic leaves the Panel not fully occupying the available client area. The amount of dead space at below the panel depends on the number of buttons instanced on the ToolBar. If no buttons are used, the layout is correct. Any ideas? ==============Form1.cs=================================== using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace WindowsApplication2 { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.ToolBar toolBar1; private System.Windows.Forms.Panel panel1; private System.Windows.Forms.ToolBarButton toolBarButton1; private System.Windows.Forms.ToolBarButton toolBarButton2; private System.Windows.Forms.ToolBarButton toolBarButton3; private System.Windows.Forms.ToolBarButton toolBarButton4; private System.Windows.Forms.ToolBarButton toolBarButton5; private System.Windows.Forms.ToolBarButton toolBarButton6; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose (); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.toolBar1 = new System.Windows.Forms.ToolBar(); this.panel1 = new System.Windows.Forms.Panel(); this.toolBarButton1 = new System.Windows.Forms.ToolBarButton(); this.toolBarButton2 = new System.Windows.Forms.ToolBarButton(); this.toolBarButton3 = new System.Windows.Forms.ToolBarButton(); this.toolBarButton4 = new System.Windows.Forms.ToolBarButton(); this.toolBarButton5 = new System.Windows.Forms.ToolBarButton(); this.toolBarButton6 = new System.Windows.Forms.ToolBarButton(); this.SuspendLayout(); // // toolBar1 // this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] { this.toolBarButton1, this.toolBarButton2, this.toolBarButton3, this.toolBarButton4, this.toolBarButton5, this.toolBarButton6}); this.toolBar1.Dock = System.Windows.Forms.DockStyle.Bottom; this.toolBar1.DropDownArrows = true; this.toolBar1.Location = new System.Drawing.Point(0, 407); this.toolBar1.Name = "toolBar1"; this.toolBar1.ShowToolTips = true; this.toolBar1.Size = new System.Drawing.Size(696, 28); this.toolBar1.TabIndex = 0; // // panel1 // this.panel1.BackColor = System.Drawing.SystemColors.Info; this.panel1.Dock = System.Windows.Forms.DockStyle.Fill; this.panel1.Location = new System.Drawing.Point(0, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(696, 407); this.panel1.TabIndex = 1; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(696, 435); this.Controls.Add(this.panel1); this.Controls.Add(this.toolBar1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } } } Tag: PropertyList Control Tag: 51927
  - 20
    - Win98: DragDrop registration fails everytime I'm ripping a thread that I created a few days ago, since I used the exact same subject line as a previous one. In addition, I can also say that since I posted this thread, I've come to the conclusion that this application is hitting some sort of wall with regards to Window handles. I'm leaning towards this being one of the primary issues because when a user selects a "tool" from a Form (it launches the core application, which is quite large), you can immediately kill the Form, go back to the tool selection Form...select it again, and it will _always_ fail to load the 2nd time. The application just dies. Furthermore, I've got try/catch blocks all over the place, sending the Exceptions to a logfile, and nothing ever gets logged once it gets in this state. You're forced to do the ole' Win98 CTRL-ALT-DEL at that point. So, the question is this: If I'm correct (or partially) in that Window handles might be the culprit, how do I resolve it? I spent an entire day forcing dispose() on everything I could possibly think of, as well as using things like the Performance Counters to identify problematic (meaning, resource hungry) classes, and I still get the same result... Can anybody (Microsoft?) help or even give me some kind of direction? Here's the original post... ----------------------------------------------------------- I have a C# Application that is posing some interesting issues when run within Win98. Let me preface this by saying that everything works like a charm under Win2000. Anyhow, the current issue is that under "certain" circumstances (there's no logic as to how/why this happens), you will fire up this application under Win98 and get a "DragDrop Error: registration failed" MessageBox from JIT. The source code line in question is, of course, a simple "this.AllowDrop = true;" property. If I were to remove it, the problem would go away. Of course, I need that call in order for the application to function correctly. And before anybody asks the obvious, I _do_ have the following line in my main Form: [STAThread] static void Main(string[] args) I can't really make heads or tails out of this issue, and it definitely presents itself only under Win98. This particular Win98 machine is up to scratch, in terms of patches/updates/etc. The OS has IE6.0 installed, as well as .NET runtime v1.1. The Application is compiled using .NET Studio 2003. Can anybody shed any light on this? Any workarounds? Tag: PropertyList Control Tag: 51926
  - 21
    - User control shows error hi, I have a Windows Form (in VB.NET) with a panel that includes a User Control that I have made. It used to work fine, but now, I have the following problem: The programs compiles and works fine. But when I look at the form in DESIGN VIEW, it does not display the UserControl, but the following error message: Object Reference not set to an instance of an object. Any idea why I have this??? thanks, Ross Tag: PropertyList Control Tag: 51919
  - 22
    - Inherited Forms Lose Tab Order 1.) Create a form with a tabcontrol. 2.) Change the modifier of the tab control to "protected" 3.) Add 1 tab to the tab control. 4.) Create a second form that inherits from the first. 5.) On the new form, add a 2nd tab to the inherited tab control. 6.) Swap the order of the tabs so the new tab occurs first. 7.) Save and close the forms. Re-open the 2nd one. Notice the tab order was not preserved. Bug? Workaround? Tag: PropertyList Control Tag: 51918
  - 23
    - CustomEditor on collection for a component I'm trying to use a custom editor for a property in a component. The custom editor shows a dialog. It appears the custom editor is not calling the SET property when its done. I've tested this with other samples and it does there. Could this have anything to do with the fact that the type of the property is an ArrayList? Bill Tag: PropertyList Control Tag: 51917
  - 24
    - Setting Application directory as path for database. I want to set my application's database path to the directory that the application resides in so that any location I install this application will look to the installation directory, instead of where I have the file located on my system. (ie C:\Documents and Folders\Users\Current User...) I am setting this at design time using the properties window for the OleDb connection. Can I do this? If not how do I do it? Tag: PropertyList Control Tag: 51906
  - 25
    - Validation + Malicious input Hello All, I am currently developing a windows form which transacts data with a database, using web services. These transactions are the heart of the application, as 98% of the tasks allowed on the UI bind to the web service. Due to the implicit need of assuring the user does not enter wrong data (SQL Data Types) or INJECTS malicious code, where can I find good information on windows forms data validation->(priority 1) and avoiding malicious code avoidance->(priority 2)? - The big question is: is there something like a asp:InputValidator on WindowsForms, or do I have to deal with it down to the nitty gritty? Thanks for all the replies, any resources are welcome Francisco Tag: PropertyList Control Tag: 51904

Can anyone recommend a good PropertyList control that I can easily add items
to in VB.NET? The built-in one seems too complicated in that you have to
create a class that you want it to represent, etc. and some of the existing
controls I have found do not seem to work under .NET.

Thanks;
Michael

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