necessary?: base.OnPaintBackground (pevent);

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- Previous
  - 1
    - Data Entry in DataGrid I have a DataGrid with an ArrayList as the DataSource and using DataGridTextBoxColumn to allow user entry in columns. Is there an easy way to let the text box handle keyboard shortcuts such as Home,End, etc. keys rather than have them apply to the DataGrid itself? For example, when editing in the text box, if you press the Home key it will move to the first column in the grid rather than the cursor moving to the beginning of the text in the column. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54997
  - 2
    - handling mousedown for dynamic pictureboxes Hi, I'm using visual studio dotnet 2002 programming in vb can anyone tell me how I can handle the mousedown event for pictureboxes I create dynamically at runtime? I've tried setting the mousedown to handle mybase.mousedown but it doesn't detect the mousedown event until I move out of the pictureboxes I have created (only works on the part of the form where I don't have any pictureboxes). I also cannot set the mousedown event to handle my array of pictureboxes as they are not a valid handle. regards, Scott M. ---- remove the "remove spam" and change (at) to @ to reply ---- Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54991
  - 3
    - Detecting app launch I was wondering if anyone knows of any method (managed/non-managed components or an API) to detect how an application was launched (sort of like the StartMode property in VB6). I'm trying to determine how an instance of IE is started. Any help would be greatly appreciated. Paul K. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54990
  - 4
    - changing directory to application path I am trying to change directories in my sub main to the application path so that my connection string will be short - i.e. the database is in the directory with the vbproj and forms and NOT the binary directory with the executable. Is this possible? Or should I put the database with the executable? In either case I imported system.io I tried to make sense of System.Reflection.Assembly.GetExecutingAssembly.Location Note The Location property returns the full path including the file name; the Path property returned only the path. and I tried chdir, path.getfullpath, etc, but no luck so far. Frankly, vb6 was far easier to use. dennist Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54978
  - 5
    - Delete control from inherited form Hi. I am playing a bit with visual inheritance in vb.net. I created a base form with two buttons, one of them has its Modifiers property set to public. When I derive a new form from my base form I can resize and change the behaviour of my public button, but I can't delete it. When using visual inheritance isn't it possible to remove controls? Thanks, Robert Scheer Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54976
  - 6
    - Textbox Focus Problem Hi folks, I tacked this posting on to the end of a related thread, but got no responses, so I'll try it as a new thread. Please excuse the reposting. I have another TextBox focus problem. In my case, I have two forms whose primary input is a text box, which must be disabled until an external event occurs. In one form, the text box is in a panel, while on the other it is on the main form. On both of them, if the form is minimised when the event occurs, they set the window state to normal, and set the TopMost property to true. When the event happens, I set the box.Visible and the box.Enabled properties to true, then do the Focus() method. On the first time the event occurs after the application is started, or if the form is minimised when the event occurs and has to pop up, the Focus() method returns false, and the textbox doesn't get focus. Every time after that, it works fine. If the form is minimised then restored again, the textbox *has* focus. If I hit the tab key, the textbox *gets* focus. I have put in a diagnostic messagebox to display the properties of the form, panel and textbox at the time of executing the Focus() method, and all the properties are correct (everything is visible and enabled and CanFocus is true). When that messagebox is dismissed, the textbox *HAS* focus! I've tried setting the form's ActiveControl property to the textbox as per the KnowledgeBase article, but that doesn't work either. I've run out of things to try. Any suggestions? Thanks, Ned Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54975
  - 7
    - Usercontrol accessing Typed Dataset in root namespace I have two projects in a solution file. One vb.net, the other c#. The vb.net project is the main project. (project1) The c# project is a usercontrol. (project2) The custom c# usercontrol is a modified version of the "collapsible panel by Derek Larkin" http://www.codeproject.com/cs/miscctrl/collapsiblepanelbar.asp?target=collapsible%7Cpanel THE GOAL: dynamically create collapsible panels in the usercontrol, and pass dataset tables to them to be shown in a datagrid in each one. THE CHALLENGE: I am able to dynamically create the panels in the usercontrol, I am able to create the datagrids, and a dataview as well. I am able to pass a dataset reference into the collapsible panel I am NOT able to get the collapsible panel to recognize the strong typing in the xsd file of Project 1. I understand the basics behind namespaces, but have not been successful in altering the project or solution preferences or code to accomplish my goal of passing the dataset into the collapsible panel and addressing specific tables, datarows, etc., etc. Thanks for you thoughts. Any and all comments are welcome. k Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54968
  - 8
    - ComboBox Validating event not firing I'm trying to implement an MS Access style NotInList event for a ComboBox. I've selected the Validating event of the ComboBox and entered code to add values where the index = -1 (i.e. text entry is not in the list). What I've found is that if the user drops down the list, types a new entry and then clicks away, the Validating event doesn't fire. It seems that I can get the Validated event to always fire but I want to use the Validating event since it can be cancelled (through the System.ComponentModel.CancelEventArgs object of the event) I have the these properties set: CausesValidation = True and DropDownStyle = "DropDown" Does anyone have a workaround or suggestion for how I can implement this? Thanks, Graeme. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54967
  - 9
    - Recommendation: www.codeabode.com This is to let people know about a currently free site which is great for people wishing to get small or large-scale outside assistance with .Net projects, or to provide such assistance. Its currently pretty quiet but as a coder, I managed to get a useful small piece of work from a US company (I'm in UK) which I can't imagine having got any other way. I think it deserves more traffic. (I'm not connected with the site in any way other than a user.) Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54965
  - 10
    - Custom Data Source Hi, I've a problem to find a solution for a problem. I've a component and have implement a DatSet with two DataTables. Also I've two DataViews on this component. I would like to use this component as data source for a WinForms DataGrid and will return the two DataViews as DataMembers. For this purpose I've IListSource implemented. It's no problem to return only one DataView, because a DataView has implemented Ilist, and the DataView is returned via IListSource.GetList(). Now, I've implemented an ArrayList to return multiple DataViews: public IList GetList() { ArrayList ar = new ArrayList(); ar.Add(this.dataView1); ar.Add(this.dataView2); return (ar); } In this case, the DataGrid doesn't show the values of the DataView or the underlaying DataTable, the DataGrid shows the public properties of the DatView. Can anybody help me? Thanks Andreas Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54963
  - 11
    - Events in windows forms Hi, I have created one mdi form and many child forms in my applicaion. In one of the forms, I have implemented leave event for one text box which gives a messagebox if the value has been changed in the text box. I also have a toolbar that closes all child forms (one at any point of time) and opens another form. The problem is that when I change the text box value and click on toolbar it popsup the message. How can i avoid that, only when toolbar is clicked? Regards, Teekam. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54961
  - 12
    - XP Icon library Hi, Does anyone know a link where I can find a modern-looking icon and thumbnail library suitable for business applications? Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54954
  - 13
    - How to: Display Long Strings in Debug Watch Window? I'm using VSNET for my environment. I need to step through my code and watch long strings get parsed. Any way I can setup a watch that will let me do this? Thanks, Steve Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54953
  - 14
    - Where is the Column collection in a DataGrid? How do I access the Column collection in a bound DataGrid? Example: DataGrid.DataSource = ds.Tables("MyTable") Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54952
  - 15
    - Threading Error I'm getting the following error in my Event Viewer Application Log: Description: Faulting application devenv.exe, version 7.0.9466.0, faulting module mscordbi.dll, version 1.0.3705.0, fault address 0x0000f64a. I'm using the following routine: Dim skt As New SBSockets() skt.IP = dr.Item("IPAddress") skt.RemotePort = dr.Item("Port") Thread = New System.Threading.Thread(AddressOf skt.StartListening) Thread.Start() When the code reaches the Thread.Start line of code, it crashes, and asks if I want to report the error to MS and restart my development environment. I got W2000 PRO SP4. Framework 1.0 384 RAM Any help on how to solve this will really be appreciated! TIA Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54951
  - 16
    - Docked window Hi, I am new to programming in .NET. I would like to create a window that would dock to one side of the parent window. Much like the property window in Visual Studio .NET. So I thought that I would create a mdi application with a child window performing as the property window. Though I believe this is the wrong way to go about it. Since the child window would not behave as those mentioned. How do I accomplish this using the .NET Framework? Thank you, Ernesto Herrera Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54950
  - 17
    - comboBox TextChanged event fires twice because Items.Insert() fires the event too... Hi, I have a simple windows form, with two ComboBox controls (and several other controls). For both of the comboBox controls, DropDownStyle=DropDown. For some reason that I can't figure out, when the user pastes text into the comboBox, the event fires twice. At first I didn't notice this, but once I added error checking, I started seeing my error twice. Here some example code: private void comboBox_doit_TextChanged(object sender, System.EventArgs e) { ... comboBox_doit.Items.Insert(1,comboBox_doit.Text); ... } Does anyone know how to prevent the second event from firing? I have tried using BeginUpdate() & EndUpdate() around Items.Insert(), I have tried using a simple bool semaphore, I have even tried unregistering the event before calling Items.Insert(), and then adding a new event handler after it... I also can not figure out why this only happens to one of my comboBoxes, and not the other one... Hmmm... Alas, I am stuck... I would be grateful for any comments, suggestions, or advice... Many Thanks, -Rob. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54942
  - 18
    - Is there a Post Load event? Trying to set selected indeces on bound combo boxes. I've discovered that if you bind a data table to a combo box, and set the selected index to -1 and or the Text to "", it doent work during The Load event. If you do it somewhere later, it does. That brings up the question of is there a post load event in the .NET framework. I looked for one but didnt find it. MFC has something like that, though the name escapes me at the moment, something like PostInit or something. Thanks, Glorfindel Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54941
  - 19
    - Crystal kills .NET app I have an application that uses the Crystal Windows forms viewer to display reports. The reports are populated with data from a strongly-typed dataset. The app runs fine on the development machine, but not on client machines. The form with the report viewer displays properly. Then I click a button to display a report in the viewer. I have figured out that the viewer's ReportSource property is set successfully to point to a valid dataset. But when the viewer starts to render the report, *the application exits.* I have spent hours with Crystal tech support on this, so I thought I'd check here to see if anyone has encountered anything similar. FWIW, there seems to be a low level error occurring of the "object reference not set" type just before the app exits. Also, I am using all the latest merge modules and valid licensing info. Thanks for any help, Matt Gould Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54940
  - 20
    - Please Help: ComboBox is closed on first click in IE hosted control Hello, I have a winforms control hosted in the IE that contains couple of CombBoxes. I have found a strange behavior: when the control is first loaded into IE, then if you first click on the one of the combos it drops down and immediately closes. It behaves normally on second try. If you first click on any other control and after that on the combo then it works as normal. Therefore I think it has something to do with the control gaining focus at the same time but I haven't managed to solve it by selecting it explicitly. Have you experienced similar problem? Does anyone know how to solve this? Thanks for your help and happy weekend, Szymon Kobalczyk Apriso Poland. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54928
  - 21
    - Please Help: Message Filter on IE hosted control Hi, I write an IE hosted WinForms control. I need to add some global shortcut keys. I found quite easy to do this by implementing an IMessageFilter. Unfortunatelly this seems not working with IE although it does work when the same control is run in standard form. When I debuged it in the IE I see that Load event where I placed Application.AddMessageFilter gets executed. But then the PreviewMessage method is not. First I thought it is a security issue (I think message filtering requires access to unmanaged code) but it runs from a full trusted source. Hence my questions are: * Has anyone experienced such behavior? * Anyone knows how to avoid it? * Does anyone has any alternative solution for global shortcut keys ? Regards, Szymon Kobalczyk Apriso Poland Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54927
  - 22
    - layout for printing I have a report in a reprot viewer this report is in landscape form put when I print it out I prints in portrait. how do i set the layout to landscape so the user does not have to change it to landscape when they hit the print button? darren Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54923
  - 23
    - Exracting images from a WinForm app This is a multi-part message in MIME format. ------=_NextPart_000_0063_01C36891.23241620 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Is there a way to extract the icons/images from a WinForm application? = Anyone know of the copyright info as well? For example, I like the = icons in the WebMatrix application and would like to simply look at them = in more detail... with a graphic application. If it's ok, would like to = use them in some of my apps, but concerned about the copyright side. ------=_NextPart_000_0063_01C36891.23241620 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1226" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT color=3D#000080 size=3D2>Is there a way to extract the = icons/images from=20 a WinForm application?  Anyone know of the copyright info as = well? =20 For example, I like the icons in the WebMatrix application and would = like to=20 simply look at them in more detail... with a graphic application.  = If it's=20 ok, would like to use them in some of my apps, but concerned about the = copyright=20 side.</FONT></DIV></BODY></HTML> ------=_NextPart_000_0063_01C36891.23241620-- Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54919
  - 24
    - WebMatrix Source? This is a multi-part message in MIME format. ------=_NextPart_000_0058_01C36890.9D3E9710 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Anyone know of plans to release the source code for WebMatrix? It's a = slick and fast IDE... moreso than SharpDevelop. Since it's a free = project, would make a great case study (similar to TaskVision). -AC ------=_NextPart_000_0058_01C36890.9D3E9710 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1226" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT color=3D#000080 size=3D2>Anyone know of plans to release the = source code=20 for WebMatrix?  It's a slick and fast IDE... moreso than=20 SharpDevelop.  Since it's a free project, would make a great case = study=20 (similar to TaskVision).</FONT></DIV> <DIV><FONT color=3D#000080 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000080 size=3D2>-AC</FONT></DIV></BODY></HTML> ------=_NextPart_000_0058_01C36890.9D3E9710-- Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54918
  - 25
    - Chocolate IDE for .NET I am in the procces of creating a screen designing tool for an existing application, this tool will be used by non-technical people. The user needs to be able to add controls to a screen and move them around. Adding controls to a form at runtime and moving/resizing is not a problem, but I am looking for an easy way make the controls look like they do in the IDE, in other words they don't fire the events. short of creating a custom control for each of the controls, that inherits the original control, I cannot find a way to do this. Any help or ideas would be good. Cheers Pete Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54908
- Next
  - 1
    - NotifyIcon remains after abnormal termination Hello - the NotifyIcon for my application remains in the system tray if the application is abnormally terminated. Is there anyway I can clean this up - either by the application (NotifyIcon.Dispose() doesn't help) or by another application that could force a repaint/repopulation of the system tray? A litle bit more background. I have written an application which, when run with certain command line arguments, will kill other instances of itself. Unfortunately, it does leave the NotifyIcons visible. Thanks very much for you help Lee Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54903
  - 2
    - Odd behavior with ActiveX control on a Windows Form Hi When putting a VB6 built ActiveX control on a Windows Form you get several troubles concerning focus in that form. First of all the Enter and Leave events for the ActiveX control only fires once. Then if you got a button on the form that lies directly on the Windows Form and presses this, it gets the "Acceptbutton" shade and whenever you press Enter it will be clicked. This is OK, but when you set focus on the ActiveX control again, the "AcceptButton" shade will not disappear. While having focus on the ActiveX control, any subsequent keypresses on the Enter-key will fire the click- event on that button and make the user very confused about what happened. Is there something you could do when writing that VB6 ActiveX control to avoid this behavior, or is this a general bug concerning all ActiveX controls being placed on Windows Forms? Please let me know if you've got the answer! /Patrik Karlsson Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54896
  - 3
    - starting form won't appear I have a simple form called frmTopicFromStart with a sub main in modPrimary. Here is the code for both. In the form I have a tabcontro with 2 tabs and a quit button. But when I start the app a no longer existing form1 appears on the screen with no controls. I checked carefully. The starting entity is submain. form1 no longer exists. I changed the file and form names to TopicFromStart and frmTopicFromStart. What's going on. Module modPrimary Friend gstrConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=H:\Program Files\Microsoft Office\Office10 \Samples\Northwind.mdb;" Public Sub Main() Application.Run(New frmTopicFromStart) End Sub End Module Public Class frmTopicFromStart 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 btnQuit As System.Windows.Forms.Button Friend WithEvents TabControl1 As System.Windows.Forms.TabControl Friend WithEvents TabPage1 As System.Windows.Forms.TabPage Friend WithEvents TabPage2 As System.Windows.Forms.TabPage <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.btnQuit = New System.Windows.Forms.Button Me.TabControl1 = New System.Windows.Forms.TabControl Me.TabPage1 = New System.Windows.Forms.TabPage Me.TabPage2 = New System.Windows.Forms.TabPage Me.TabControl1.SuspendLayout() Me.SuspendLayout() ' 'btnQuit ' Me.btnQuit.Location = New System.Drawing.Point (504, 456) Me.btnQuit.Name = "btnQuit" Me.btnQuit.Size = New System.Drawing.Size(80, 40) Me.btnQuit.TabIndex = 1 Me.btnQuit.Text = "&Quit" ' 'TabControl1 ' Me.TabControl1.Controls.Add(Me.TabPage1) Me.TabControl1.Controls.Add(Me.TabPage2) Me.TabControl1.Location = New System.Drawing.Point (168, 48) Me.TabControl1.Name = "TabControl1" Me.TabControl1.SelectedIndex = 0 Me.TabControl1.Size = New System.Drawing.Size (432, 344) Me.TabControl1.TabIndex = 2 ' 'TabPage1 ' Me.TabPage1.Location = New System.Drawing.Point (4, 22) Me.TabPage1.Name = "TabPage1" Me.TabPage1.Size = New System.Drawing.Size(424, 318) Me.TabPage1.TabIndex = 0 Me.TabPage1.Text = "General" ' 'TabPage2 ' Me.TabPage2.Location = New System.Drawing.Point (4, 22) Me.TabPage2.Name = "TabPage2" Me.TabPage2.Size = New System.Drawing.Size(424, 318) Me.TabPage2.TabIndex = 1 Me.TabPage2.Text = "TabPage2" ' 'frmTopicFromStart ' Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(648, 518) Me.Controls.Add(Me.TabControl1) Me.Controls.Add(Me.btnQuit) Me.Name = "frmTopicFromStart" Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen Me.Text = "Topic From Start" Me.TabControl1.ResumeLayout(False) Me.ResumeLayout(False) End Sub #End Region End Class Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54892
  - 4
    - TextChanged event firing before the KeyXXX events Hi all, I have a combobox control, in wich I put an autocomplete code. This code is in the TextChanged event, but when this event fires, the Text property isn't updated yet. For example, if the Text property is "Foo" and I press the letter "d", the Text property when the TextChanged event runs is "Foo". Only after the TextChanged event be processed, the KeyDown, KeyUp and KeyPress events fires and update the Text property. I think it's very strange. Is it a bug? How can I get the correct Text property in the TextChanged event? Thanks in advance, Fabrício de Novaes Kucinskis. Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54890
  - 5
    - Select MenuItem Question I'm building menus in code from a database. How do I determine which menu item was selected? Does the System.EventArgs contain this? If so, what property? Here's the declaration: Private Sub Menu_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Click Thanks! Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54887
  - 6
    - Keep WinForm open on own thread Hi, I have a situation where I have a sub that is started on its own thread. The sub opens a form which is supposed to stay open, and it does open for a brief flash, but as soon as the sub ends, the form goes away. This behavior makes sense to me, but I'm wondering how I can keep the form open until the user is done filling it in, then close the form and abort the thread. Thanks in advance, -George Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54886
  - 7
    - Pasting metafile from clipboard into picturebox control Hi, I am currently writing some code which copies an image in the Windows metafile format pasted on the clipboard into a picturebox control. For some reason, I have not been able to get the following code to work: Dim od As IDataObject = Clipboard.GetDataObject() If (od.GetDataPresent(DataFormats.MetafilePict)) Then PictureBox1.Image = CType(od.GetData (DataFormats.MetafilePict, True), Metafile) End If When I switch the formats to Bitmap, everything works fine, but when I use the EnhanceMetafile or the MetafilePict formats, I get a blank picturebox. I have been reading on the net about how there is a bug in the framework with regards to metafile formats on the clipboard but I don't know enough about the native API calls to make heads or tails of it. Any help would be appreciated. Victor Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54884
  - 8
    - Problem placing components on inherited forms Hello, I am trying to create a custom control which inherits from System.Windows.Forms.Form and can be used as a base class for an application. So far so good. I am also writing custom components which inherit from System.ComponentModel.Component. What I would like to know is if there is any way for my custom form class can be made aware of these components? The problem is that when my form class is instantiated at design time via "Add Inherited Form" and I drop a component on this form, the designer automagically extends the base class by adding an IContainer called "components". The component is then added to this collection. Is there any reasonably simple way to get these components to act like controls and drop themselves into a nice collection of my choosing? I also need the reverse link - from component to form i.e. something comparable to the Parent property of controls. Thanks for all help. Sincerely, Markus PS - for more background info, I started a thread on Aug. 19th '03 re: "How-to create user control replacing..." Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54883
  - 9
    - newbie C# Clicked event not firing Hi All, In a C# Windows project, My clicked event code did not fire. First I had to actaully declare the method rather than just adding the code and then in the InitializeComponent I had to add: this.button1.Click += new System.EventHandler (button1_Click); So that the event would run. In vb.net this seems to be generated automatically. Do I have a setting turned off somewhere in Visual Studio? tia Randy Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54864
  - 10
    - Form cannot be designed I have recently installed v1.1 of the .NET framework, and in the project I am working on, I have changed the reference path to refer to the new framework. Now I get an error message saying that "The base class 'System.Windows.Forms.Form' cannot be designed" If I change back to the older version of the framework it seems to work fine, but I need to use some of the newer classes only available in v1.1 All help will be most appreciated Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54862
  - 11
    - minimize to tray Hi all! How can I minimze a windows forms application to the tray and keep it there? Regards Markus Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54858
  - 12
    - Printing Question How do I select a printer tray when printing from VB.NET? If I have "Tray 1" set as "Plain" in the printer driver and "Tray 2" set as "Letterhead", how do I specify the paper type when printing so it goes to the correct tray? Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54857
  - 13
    - SIMPLE question. Hello all - I have 2 VB.Net Win forms. When I'm through with using Form #2, I just close it but what I want is trigger an update event on Form #1 based on the activity inserts I just did in Form #2. Is there an event that I can call with the form being open already like frm1.<combo box>.focus so I can trigger the update event. I realize this a simple question but during the converting to .Net idea, I don't want to create a new instance of that form. So even a gotfocus or focus to the form itself would be great. And any code of how that is constructed. Much thanks and cheers! Mark Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54852
  - 14
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  - 23
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  - 24
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  - 25
    - ComboBox : display different string than the selected list item What I'm trying to do : - Add a form to a new project - Add a comboBox to the form with DropDownStyle = DropDown - In form load : ComboBox1.Items.Add("01 - USA") ComboBox1.Items.Add("31 - Holland") ComboBox1.Items.Add("33 - France") ComboBox1.Items.Add("41 - Switzerland") The desired behaviour is that when a user selects a list item only the number is displayed in the textbox part of the comboBox. So if "01 - USA" is selected only "01" should be displayed. Roughly translating the way this would be done in VB6 I tried the following code : Private Sub ComboBox1_SelectionChangeCommitted( _ ByVal sender As Object, ByVal e As System.EventArgs) _ Handles ComboBox1.SelectionChangeCommitted Dim listItemText As String If ComboBox1.SelectedIndex >= 0 Then 'Calculate and store the value we want to display listItemText = ComboBox1.SelectedItem.ToString If listItemText.Length >= 2 Then listItemText = listItemText.Substring(0, 2) End If 'Cancel the selection ComboBox1.SelectedIndex = -1 'Update the textbox part ComboBox1.Text = listItemText End If End Sub However this doesn't work. I've also tried experimenting with the SelectedValueChanged, SelectedIndexChanged and TextChanged events, with no better results. It seems that changing the selectedIndex in any of these routines always cancels out changes made via the text property, whatever the order the operations are carried out in. I've finally resorted to using a timer to update ComboBox1.Text after all these events have finished firing, but it's a very shoddy solution. Surely there must be a way to do this properly? Tag: necessary?: base.OnPaintBackground (pevent); Tag: 54795

I'm painting the entire background of a form. My question
is is it necessary to call base.OnPaintBackground
(pevent); before I do my painting?

I don't want to call it because it paints the form with
the default color - a waste of time, and it causes
flickering.

Not calling it doesn't seem to cause any problems.

Thanks,

john@3dweb.com

Top

Re: necessary?: base.OnPaintBackground (pevent); by jwallison

jwallison
Mon Aug 25 11:54:30 CDT 2003

No, it isn't necessary.

See the OLH for topics "SetStyle" and ControlStyles enum - discusses
double-buffering, ignoring WM_ERASEBKGND, etc. to reduce flicker, among
paint optimization topics..

--
Regards,

Jim Allison
jwallison.1@bellsouth.net
(de-mung by removing '.1')

"John Charbonneau" <john@3dweb.com> wrote in message
news:033401c36a9e$38734000$a101280a@phx.gbl...
> I'm painting the entire background of a form. My question
> is is it necessary to call base.OnPaintBackground
> (pevent); before I do my painting?
>
> I don't want to call it because it paints the form with
> the default color - a waste of time, and it causes
> flickering.
>
> Not calling it doesn't seem to cause any problems.
>
> Thanks,
>
> john@3dweb.com

Top