DataGrid - reduce flicker-free

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  - 1
    - Unable to keep form on top I'm trying to create a screensaver using managed directx, but the same happens with the wizard generated screensaver project in VC# 2005. Any window set to "always on top" is not getting obscured, like the standard windows screensavers can. I've tried setting the presentparams for the device constructor to "windowed=false". I've set the form property Toplevel=true, topmost=true, and called .bringtofront(). Anybody know what I'm missing? Tag: DataGrid - reduce flicker-free Tag: 78934
  - 2
    - Controls created on one thread cannot be parented to a control on a different thread I am trying to make a window that pops up, to show that my application is busy. I want it to be able to be called from anywhere, any thread, so I put it as a static method in a class. Code listed below. The problem is, no matter what I can think of doing, I get the following exception: "Controls created on one thread cannot be parented to a control on a different thread" Trace: at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous) at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args) at UI.Waiter.Busy(Object waitOn) or i used to get this with a slightly different configuration (same exception): Trace: at System.Windows.Forms.ControlCollection.Add(Control value) at System.Windows.Forms.ControlCollection.Add(Control value) at UI.Controls.WaitForm.InitializeComponent() at UI.Controls.WaitForm..ctor() at UI.Waiter..cctor() Anyone got any ideas... or am i going about it the wrong way all together!? Cheers Greg ----- CODE ----- using System; using System.Collections; using System.Threading; using System.Windows.Forms; namespace UI { /// <summary> /// Summary description for Waiter. /// </summary> public sealed class Waiter { private static ArrayList _list = new ArrayList(); private static Mutex _lock = new Mutex(); private static Controls.WaitForm _form = null; private static Form _parent = null; public static Form Parent { get { return _parent; } set { _parent = value; } } private Waiter() { } private delegate void BusyDelegate( object obj ); public static void Busy( object waitOn ) { if( _parent != null ) _parent.Invoke( new BusyDelegate( InternalBusy ), new object[] { waitOn } ); } private static void InternalBusy( object waitOn ) { // this has to be done here for threading reasons if( _form == null ) _form = new Controls.WaitForm(); // show the waiting form _lock.WaitOne(); try { _list.Add( waitOn ); if( _list.Count == 1 ) { _form.Restart(); _form.Show(); System.Windows.Forms.Application.DoEvents(); } } finally { _lock.ReleaseMutex(); } } public static void Ready( object waitOn ) { _lock.WaitOne(); try { _list.Remove( waitOn ); if( _list.Count == 0 ) { _form.Hide(); } } finally { _lock.ReleaseMutex(); } } } } Tag: DataGrid - reduce flicker-free Tag: 78931
  - 3
    - embedded powerpoint diasshow Does anyone know how to embed a powerpoint presentation in a windows forms applikation. I can't find any documentation on how to do this anywhere. Seems there isn't an Active-X control for viewing powerpoint presentations from within another application. Regards Ole Inselmann Tag: DataGrid - reduce flicker-free Tag: 78920
  - 4
    - Problem using SHBrowseForFolder I am using VS 2003, .net 1.1 I am trying to use the SHBrowseForFolder dialog, as wrapped up in a component from CodeProject (I don't have the URL handy). The dialog appears, but the treeview does not. I get the same result using the old .net 1.0 method with FolderNameEditor and FolderBrowser(). It used to work before I upgraded to 1.1 . Any suggestions? TIA, Art Tag: DataGrid - reduce flicker-free Tag: 78918
  - 5
    - fileacces problems Hi, I'm in the middle of developing a c# project. When I run my application from VS.net it's run from the projects bin\debug library. My problem is, that when closing the application I am writing a xml file containing some settings to this library, but I get an "Access denied error". I am experiencing this error because the debug folder is marked as "read only". It doesn't matter if I uncheck the "read only" checkbox, because everytime my project is compiled, it is set again. How do I change this, and why is the acces to this folder restricted to "read only"? Thank you. Best regards Torben Tag: DataGrid - reduce flicker-free Tag: 78915
  - 6
    - How to make a UI which resembles the VS.NET 2003 IDE UI Hello! The VS.NET 2003 user interface has very nice details. The small areas which look like windows and which may slide away if you don't need them for the moment. Can't some of you illustrate a bit how such details may be built? Best regards, Henrik Dahl Tag: DataGrid - reduce flicker-free Tag: 78913
  - 7
    - Autocomplete combobox For all of you who are searching for auto complete functionality in .net combobox. I wrote this code yesterday after being unable to find something usable and workable on the internet. All examples that I've tried either bulky and simply not elegant and inefficient or does not work properly. Maybe I was just not lucky and patient enough to try more examples :) instead I wrote my own code. Hope it helps someone. I appreciate all comments and bugs in the following code being posted back to the group. Regards, Michael Shapiro P.S. call this sub from KeyUp event of the combobox Public Sub AutoComplete(ByVal cbo As System.Windows.Forms.ComboBox, ByVal e As System.Windows.Forms.KeyEventArgs) Dim index As Integer Dim p As Integer Select Case e.KeyCode Case Keys.Back, Keys.Left, Keys.Right, Keys.Up, Keys.Down, Keys.Delete, Keys.Tab Return End Select p = cbo.SelectionStart index = cbo.FindString(cbo.Text.Substring(0, p)) If index = -1 Then Return cbo.SelectedIndex = index cbo.SelectionStart = p cbo.SelectionLength = cbo.Text.Length End Sub Tag: DataGrid - reduce flicker-free Tag: 78911
  - 8
    - Docked panels and Z-order problem. Hallo=2E I have two panels docked on the right of the form (p1 on the left= and p2 on the right) and I want third panel to slide from right= to left into a view between p1 and p2 (Just like Solution= Explorer window in Visual Studio ? if it is in auto hide mode= its slides to left when mouse is over it), but when I put my= third panel on Controls list of the form, set it child index= between those two and start to slide I have opposite effect ?= the p1 is visible and p2 is hidden ? it is a way to do this= right ??? -------------------------------- From: Dominik Jeske ----------------------- Posted by a user from =2ENET 247 (http://www=2Edotnet247=2Ecom/) <Id>yW8wOI8ZAk6AmAd7vIZBcg=3D=3D</Id> Tag: DataGrid - reduce flicker-free Tag: 78906
  - 9
    - Problem with Z-ordering !!! Hallo !! I have two panels docked on the right of the Form (z order index= p1: 0, p2: 1) and I want to third panel slide from the right= between those two panels (just like in Visual studio when you= put mouse over autohided SolutionExplorer its slides to view)= but because of z-ordering when I put my control on the form and= set his ChildIndex between those two I have opposite effect ? p2= is hided and p1 is visible ? any idea how to do this right ?= ????????? -------------------------------- From: Dominik Jeske ----------------------- Posted by a user from =2ENET 247 (http://www=2Edotnet247=2Ecom/) <Id>VZCLNlkgMEinfTjACsJSzg=3D=3D</Id> Tag: DataGrid - reduce flicker-free Tag: 78905
  - 10
    - Form transparency issues Recently I wanted to create a small little program that could sit= on the desktop and not block the desktop wallpaper=2E There are= two methods to accomplish this ( that I am aware of )=2E 1) create a solid color bmp as a background image and set the= transparency key to match its color 2) specify the form's background color with a matching= transparency key Now my issues with both methods, but first it should be known= that I have set the forms to have no border or title bar and= have implemented code that allows me to click-and-hold anywhere= ( with exceptions listed below ) on the form and move it=2E The= data actually displayed on the form is just text and one= rectangle, all drawn by me ( there are no controls on the form= itself )=2E 1) I have two issues with this method, although it is what I'm= prefering to use at the moment=2E The first seems to be the= discrepancy between how the program is handled when the= computer's Color Depth is 32bit or when it is less than 32bit (= 16bit )=2E When the color depth is 32bit then I am able to click= on the entire area the form inhabits ( even that which is= transparent ) and move it, but if the color depth is less than= 32bit ( 16bit ) then only the drawn text or rectangle outline (= since it has no fill ) can be clicked to drag the program= around=2E Clicking on the transparent areas just passes the click= through the form to whatever is below ( even when I know the= form has focus )=2E I'd like to be able, regardless of the= desktop's color depth, to click anywhere within the form area= and move the application=2E The second issue I have with this method occurs when I take my= executable and put it on another PC ( my PC is XP Pro, the other= PC is XP Home=2E=2E Both SP2 )=2E The problem is similar, but a= little different=2E When the 2nd PC's color depth is at 32bit,= the transparency does not work=2E The green/lime ( that's the= transparent color I'm using ) background shows=2E Needless to say= this is not acceptable=2E When I change the color depth to less= than 32bit ( 24bit this time ), the transparency actually works,= but I come across the same issue of clicks on the transparent= areas just passing through=2E 2) With this method I have not tried it on a 2nd PC yet ( I don't= have it available where I am atm )=2E Its basically the same= "issue" as mentioned above with color depth less than 32bit,= except it does it with a color depth of 32bit and 16bit=2E Clicks= on the transparent areas just pass right through=2E I'm tempted= to just go with this method and possibly make one area on the= form that is meant to be used to drag it around ( similar to the= idea of the box that appears to move tables in MS Word ), but= I'm hoping there's a solution I'm unaware of before I do that=2E Anyways, all of this brings up some interesting questions=2E -What does color depth have to do with transparency handling? -Does the version of XP ( Home or Pro ) handle transparency= differently? Probably some more questions also=2E Not sure if it matters, but I'm doing all of this in C#=2E So any ideas to get pass any of these issues? Thanks in advance=2E -------------------------------- From: othell m=2E ----------------------- Posted by a user from =2ENET 247 (http://www=2Edotnet247=2Ecom/) <Id>8xrsHvZKNkGRSJumCntIww=3D=3D</Id> Tag: DataGrid - reduce flicker-free Tag: 78904
  - 11
    - Odd closing problem I have a base form with a Cancel button (btnCancel) and a simple msgbox routine. I would like to have a routine closing check to prevent loss of data. Dim i As Integer i = MsgBox("Exit?", MsgBoxStyle.YesNo + MsgBoxStyle.Question) If i = MsgBoxResult.Yes Then Me.DialogResult = DialogResult.Abort Me.Dispose() End If I have another form that inherits from the base form. In both parent and decendent the Cancel button property of the form is set to (None). The problem is this. Even given the above, even given that I've traced the code and can see that the Me.dispose call is NOT being made when I click No, the form still closes. Any suggestions as to what I might be overlooking? Tag: DataGrid - reduce flicker-free Tag: 78900
  - 12
    - Formatting txtPhone I have a txtPhone that I need to format like 555-555-5555 and when a user inputs numbers it should only take numbers. Tag: DataGrid - reduce flicker-free Tag: 78899
  - 13
    - strange problem with binding collection object to listbox control I have a business object with two public properties - "OrganizationID" and "OrganizationName". Pretty typical. We will call it Organization. And I have a collection object which is an arraylist that stores a collection of the business object described above. Let's call it Organizations I have a lstbox control. So I bind it Organizations to the listbox control. lstSelectedOrgs.DataSource = null; lstSelectedOrgs.ValueMember = "OrganizationID"; lstSelectedOrgs.DisplayMember = "OrganizationName"; lstSelectedOrgs.DataSource = Organizations; I initially populate the control. Then I have a way to remove an item. And then I bind it again. At some point, all of a sudden, what shows up in the list box looks like this. MyNameSpace.Organization Tag: DataGrid - reduce flicker-free Tag: 78895
  - 14
    - how do I set the version information? How do I set the version of my app? I can do this in the setup app, but it does not coincide with the actual application. -Max Tag: DataGrid - reduce flicker-free Tag: 78894
  - 15
    - Beta Readers Wanted - Whidbey C# - (O'Reilly Author) This is a one time request for beta-readers for a new book I'm working on. ************* I'm writing a new book on Visual C# 2.0 - target audience is C# 1.x programmers looking to move up to 2.0 (code-name Whidbey). The ideal candidates have been programming in Visual C# 1.x for a while, are familiar with and comfortable with all the language fundamentals, delegates, creating windows and web applications and so forth and are ready to learn what is new in Visual Studio and C# 2.0, as well as highlights of what is new in creating Windows and Web Applications. I will post the chapters after I've written them but before they've been edited or tech-reviewed. Your job will be to provide guidance and advice as to how helpful the chapter is, what is missing, what could be clearer, etc. You can expect to read (and respond to) about 40-50 pages per week through Thanksgiving; starting next week. Ideally, you'll have the Visual Studio 2.0 Beta installed on a computer and will be able to try the exercises, though this is not strictly required. There is no financial compensation (though active participants will receive a copy of the book when it is published, and an acknowledgement in the book itself). You will need to sign a Non-disclosure agreement and you'll need to join a forum on Delphi (membership is free). If you are interested, please send me email (jliberty@LibertyAssociates.com) with your name, email, C# experience, etc. Thank you. Jesse Liberty Author: Programming C# Programming Visual Basic .NET Programming ASP .NET Programming Windows .NET Applications Numerous other books http://www.LibertyAssociates.com Tag: DataGrid - reduce flicker-free Tag: 78893
  - 16
    - Logic Help I need some help with user names and passwords (five users and one password for each user). I have two txtboxes (txtName, txtPassword). If a user clicks enter and both are empty then a message is displayed, "enter user name." If just the name is entered the message "enter password." If wrong name and right password then message "re-enter name." If right name and wrong password message "valid name, wrong password." I cant figure this out, can someone help me please? The names are tied to a passwords, for example a user might have 123 for a name and a password of 456 Tag: DataGrid - reduce flicker-free Tag: 78879
  - 17
    - Make checkbox larger Who knows how to make the actual check box rectangle larger? Is the onlyway to inherit from checkbox and override its paint method or something? thanks Tag: DataGrid - reduce flicker-free Tag: 78865
  - 18
    - Using designer without Forms My program consist of different panel that I load and unload on a form. I would like to be able to user the Form designer directly on a panel without using a form since this panel will be put on a form at run time. Any ideas? Tag: DataGrid - reduce flicker-free Tag: 78864
  - 19
    - scrolling a user control Hi, I have created a user control which I then add standard controls to prgramatically i.e. picture box, text box etc. I'm just wondering if it is possible to scroll to given position in the scrollable region? So lets say the control has a height of 300 pixels and the scrollable height is 1000 pixels then I'd like to be able to just make pixel 500 appear in the top left of the controls visible area. If this isn't possible what alternatives are there for scrolling a user control programatically. Many thanks in advance for any answers. Best Regards, Steve. Tag: DataGrid - reduce flicker-free Tag: 78861
  - 20
    - Icon in tray with Windows Service How can i get an icon in the tray to allow for service control/configuration? I have tried allow service to interact, but it didn't work like i wanted, i could see the icon but i couldnt do anything with the context menu. TIA. Tag: DataGrid - reduce flicker-free Tag: 78856
  - 21
    - Error: Specified Cast is invalid Hello: Hope you can help me. Below is the code in Windows Forms VB to Export the "Notifications.rpt" Crystal reports to PDF. This report is connected to a dataset. The oRptNOTE.Export() line is failing. I am not sure why. Dim oRptNOTE As Notifications oRptNOTE = New Notifications oRptNOTE.SetDataSource(Dataset12.notification) Dim DiskOpts As CrystalDecisions.Shared.DiskFileDestinationOptions = New CrystalDecisions.Shared.DiskFileDestinationOptions oRptNOTE.ExportOptions.ExportDestinationType = CrystalDecisions.[Shared].ExportDestinationType.DiskFile oRptNOTE.ExportOptions.ExportFormatType = CrystalDecisions. [Shared].ExportFormatType.PortableDocFormat DiskOpts.DiskFileName = "c:\temp\test2.pdf" oRptNOTE.ExportOptions.DestinationOptions = DiskOpts oRptNOTE.Export() Tag: DataGrid - reduce flicker-free Tag: 78853
  - 22
    - Client side controls in IE not working as expected I am developing a windows forms user control that will be hosted within IE from a web page. For testing purposes and on the client machine, I changed the .NET Framework security policy to give full access for the site that has the control. After all this, IE shows the control fine without problems. The problem happens when the control is signed with public private keys pair, IE doesn't show the control but shows an empty box instead (like an image link is missing or something).. This is the HTML code i am using to host the control: <OBJECT id="HelloWorldControl1" height="500" width="500" classid="NetAppletCtrl.dll#NetAppletCtrl.HelloWorldControl" VIEWASTEXT> </OBJECT> Any comments why IE doens't show the control when it's signed. Do I have to specify the strong name? I tried a lot and couldn't figure out how.. Maybe it's a bug in IE!! Thanks, Tag: DataGrid - reduce flicker-free Tag: 78851
  - 23
    - mshtml and windows services I have an application that uses the Ax web browser object. When I call the IHTMLElement.click() method on an input button (<input type="submit"> or <input type="button">), the click fires appropriately, if I'm running it from a windows forms based application. However, when I run the EXACT same code under a windows service, either as a logged in user or as the local system account, the click fails to process. Clicking on other elements (like <a>) works. I've tried submitting the form directly, in cases where a submit occurs, but can't do that either. Both GET and POST actions fail. What am I doing wrong? Is there something that prohibits the onclick event from firing for buttons when running as a service? Am I missing something? Robert Tag: DataGrid - reduce flicker-free Tag: 78849
  - 24
    - Windows Form And Windows Service Hello Can we invoke any windows from from windows service on specific time reach? Thanks in Advance Tag: DataGrid - reduce flicker-free Tag: 78848
  - 25
    - C# Windows App - SecurityException Hello, I created a very simple C# application that does nothing more than starts an IE session and points to a specific site. Works great on my LocalMachine or anyone's localmachine. However, when we attempt to run it from the network we get a System.Security.SecurityException error. From some searching that I have done I needed to create a StrongName for it. I did and referenced it in my AssemblyInfo.cs file, gave it a build version and recompiled. That doesn't seem to do anything differently. I am wondering what to do, step by step instructions in how to get an .exe file to run from a network? TIA, Kevin Tag: DataGrid - reduce flicker-free Tag: 78844
- Next
  - 1
    - No Touch Deployment and querystring parameters Let me start off by saying that I have read the Chris Sells article on MSDN (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnforms/html/winforms05152003.asp). I am trying to implement it on my project. I have copied his ConfigFileHandler class and tried to use it in my project but I keep getting the "An exception â??System.IO.FileLoadExceptionâ?? has occurred in IEExec.exe" error. I also read about the need for the Last-Modified header. I can not get it to work and I am not sure how to debug to try to get a better understanding of the problem. Any one have any ideas on a solution? Tag: DataGrid - reduce flicker-free Tag: 78843
  - 2
    - How to show a modal dialog from a different thread Hi, I have the following classical situation; 1)A long operation needs to be done in my application( that has many windows ) 2)A progress dialog must be shown in a separate thread 3)The long operation continues in the program main thread. The problem is, from the second thread I call ShowDialog(), but this dialog will not be Modal!!! Obviously .net modal dialog will only work if all dialogs in the application are opened in same thread. in my scenario I can simply switch between two dialogs( the progress dialog and the backgroud dialog) How can I show a dialog that is modal to all other dialogs even if the application dialogs were opened in different threads? Regards, Faris Tag: DataGrid - reduce flicker-free Tag: 78833
  - 3
    - Crystal Report table fields change when reviewed. I have a crystal report, using a typed dataset. I click my button to view the report, it's at this point I have a break point. I look at the table fields, and they are wrong. But, if I click my view button a second time, without restarting the app, the fields are correct. Where am I getting my wrong fields from. Tag: DataGrid - reduce flicker-free Tag: 78828
  - 4
    - Get currently selected row in datagrid? I have a datagrid bound to a dataview. How do I get the currently selected row programmatically so I can retrieve my primary key? Tag: DataGrid - reduce flicker-free Tag: 78824
  - 5
    - ImageLists on localized forms Hi. When setting Form.Localizable = True in Visual Studio, any ImageList on the form is copied/serialized into the resources for each language. This behavior is really annoying, since I only want to have _one_ copy of the icons (the same icons for all languages). Right now I have to either manually update the icons for each language or remove the serialized ImageList from the resx files. Another problem is that the application is getting "bloated" because of the multiple copies of the same icons. Is there any way to avoid this behavior? I already have implemented a customized LocalizationFilter ( http://windowsforms.net/articles/localizationfilter.aspx ), but the Windows Forms designer seems to ignore it when checking if the ImageLists should be serialized. Regards, Gerrit Tag: DataGrid - reduce flicker-free Tag: 78822
  - 6
    - Datagrid looks different in design view to runtime? I've built a datagrid in the form design view and specified column widths in the DataGridTableStyle collection editor. It looks fine in design view, but when I run my app all my columns are the same width. How could this be? Regards, Chris Tag: DataGrid - reduce flicker-free Tag: 78820
  - 7
    - Urgent Help on converting vb6 chr$() to C# Dear all, I'm using VB6 need to convert to C# for printing. In VB6 I will send some printer command into the printer as below:- Printer.Print "TESTING LINE 1" Printer.Print "TESTING LINE 2" Printer.Print Chr$(&H1C); "(L"; Chr$(66); Chr$(49); Printer.Print Chr$(&H1D); "V"; Chr$(49); Printer.Print Chr$(&H1C); "(L"; Chr$(67); Chr$(50); In C# I'm writing a text file and open LPT1 to print some lines, the problem is how to convert those VB6 codes into C# ? I've try using some sample code as below :- writer.WriteLine ("TESTING LINE 1" + ((char) 13)); writer.WriteLine ("TESTING LINE 2" + ((char) 13)); writer.WriteLine( ((char)&H1C) + "(L" + ((char)66) + ((char)49)); But there are errors on the above codes. Please provide solutions and examples. Thanks in advance Cheers, Mae Tag: DataGrid - reduce flicker-free Tag: 78814
  - 8
    - Datagrid - GridLineStyle Hi, I have a requirement to show only vertical lines in the datagrid, is there any way we can do this. Thanks Bala Tag: DataGrid - reduce flicker-free Tag: 78811
  - 9
    - background images sooo slow Hi all, I'm working on an application and want to use background images for forms and controls. Using the images itself is not a problem, but when I run my application it becomes really slow and my CPU usage goes up to 100% for a time... Is there a better way of setting background images? It's just 3 images I think, all pretty small, and I already created the objects for the images and set them to the controls at runtime so that it uses only 3 objects and not new instances for every control. But still... It can't be that hard just to show a couple of images...? Many thanks for your help... Andreas Tag: DataGrid - reduce flicker-free Tag: 78810
  - 10
    - Richtext SelectedText Selectionstart I have a very ODD situation. I have a RichTextBox and a button. In the button click event I have the following: me.richtextbox1.SelectedText="test" Assuming I start with "aaaabbbbcccc" in the richtext box and I place the caret between the a and b and hit the button. I get "aaaatestbbbbcccc" as expected. Then I click between the b and the c and hit the button I get: "testaaaatestbbbbcccc". I added some watches on richtextbox1.SelectionStart and find that the first time it is 5 as expected. But on the second button press it is zero! Also the SelectionLength is zero on the second press even if I set the cursor between the b and c and drag across the first three of the c's. This all occurs in my actual application, so I created a simple form with only these two elements and it works fine. So obviously something else is interfering with this operation in my real application. I am at a loss as to what! In the real app the richtextbox is bound to a dataset, but I can't see why that should cause this behavior. I don't see any other events firing that might somehow screw up the SelectionStart like this. The Richtextbox is on a tabpage (and so is the button), but again I see no reason why that should have an effect. Anybody else ever struggle with this? Gary Tag: DataGrid - reduce flicker-free Tag: 78809
  - 11
    - simple binding of controls to object properties - refresh controls I have a dialog with controls bound to class properties, e.g. : numericUpDownPort.DataBindings.Add("Value", localOptions, "Port"); textBoxDatabaseName.DataBindings.Add("Text", localOptions, "DatabaseName"); textBoxDataUsername.DataBindings.Add("Text", localOptions, "DataUsername"); - i.e. localOptions (a member of the form) is a instance of a class with properties DatabaseName, Port etc. My problem is that when the underlying object is refreshed (user can load the class from a file), the controls don't update. The object's properties are now different from the user interface. How to I force the controls to reload their data from the object? I thought Push/PullData() might be my new friends but these are protected methods. Thanks for the help, Rua HM. This is a kindoff-followup to "control data binding not happening when data entered from app" http://msdn.microsoft.com/newsgroups/default.aspx?dg=microsoft.public.dotnet.framework.windowsforms&tid=8b0951c9-07b2-4c65-b891-baea7036ece5&cat=en-us-msdn&lang=en&cr=US&sloc=en-us&m=1&p=1 Tag: DataGrid - reduce flicker-free Tag: 78800
  - 12
    - Change Windows Class Name Is there a way to override the forms default window class name .. (WindowsForms10.Window.8.....) ? I tried to override CreateParams but got an exception System.ComponentModel.Win32Exception "Invalid window class name" Can someone please help as my app needs to be located by a c++ app which is using FindWindow() method. Any help will be greatly appreciated... Tag: DataGrid - reduce flicker-free Tag: 78799
  - 13
    - ComboBoxes and the sorted property Discovered a fun one that I thought I should share, and hopefully catch Microsoft's attention to update some documentation. I'm a bit new to VB.NET, and was struggling with getting a combo box to work. I was attempting to take advantage of the cool way to load a combo box via a datasource, rather than the old VB6 way of adding selections. First I tried an array of objects. I had some issues with that that I suspect had a lot to do with not overloading ToString on the class so the combo box would return the right thing for the displaymember item. But I had also read some bugs around arrays and combo boxes, so I switched to a disconnected dataset. I had a heck of a time getting the combo box to load properly. I kept getting either no data in the combo box, or it kept showing the phrase "System.Data.DataRowView". I found out that you have to set the datasource property first, before you set the datamember and the valuemember properties. But the real kicker was that you can't use the datasource and get it to work if the sorted property on the combo box is set to true. It appears that if you set that property to true, then the combo box assumes you're going to do things the old VB6 way and use the Add items method to the combo box. My tipoff something was wrong that I'd watch the debugger, and right after the statement like this: cbTest.DataSource = dsInfo.Tables(0) the value of cbTest.Datasource was "nothing", like the assignment didnt take. In order to get things to work the way I wanted them to, I simply built a dataview that sorted the table for me, and fed that to the combobox with the sorted value off, and it finally worked. Three weeks later, of course. Would someone from Microsoft confirm that you shouldn't use datasource in combo and list boxes if you set the Sorted property to true in the form designer? If that is the case, note that somewhere in the MSDN information about the ListBox and the ComboBox classes!! It's not mentioned in the MSPress books either (I have Programming Microsoft Visual Basic.Net, the 2003 version, ISBN 0-7356-2059-8) Tag: DataGrid - reduce flicker-free Tag: 78798
  - 14
    - DataGrid I need help in a bad way. I have a form with a datagrid in it coming for a Access DB. I have 3 columns, StudentName, Address, Phone. I am using Me.bindingcontext(School11, "Student") to bind buttons like first, next ect... I have a button Add/Edit and Update to Disk and Insert I have no idea how to code this so I can add a record to the above table. Can someone please help me! Tag: DataGrid - reduce flicker-free Tag: 78797
  - 15
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  - 24
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hi,

How to make datagrid flicker-free? I have tried to set ContorlStyle double
buffering options, but seems not working well.

thanks

Top

RE: DataGrid - reduce flicker-free by mklapp

mklapp
Mon Oct 18 09:19:07 CDT 2004

What are you doing to the datagrid that makes it flicker (and when does it
flicker)? I dont see that problem (or I am not noticing it).

"jason" wrote:

> hi,
>
> How to make datagrid flicker-free? I have tried to set ContorlStyle double
> buffering options, but seems not working well.
>
> thanks
>
>
>

Top

Re: DataGrid - reduce flicker-free by jason

jason
Mon Oct 18 20:48:24 CDT 2004

I have columns with images drawn, if I drag the horizontal scrollbar, the
flickering is quite noticeable.

"mklapp" <mklapp@discussions.microsoft.com> wrote in message
news:1CE38926-972C-4BB6-A6A2-AA70893C4129@microsoft.com...
> What are you doing to the datagrid that makes it flicker (and when does it
> flicker)? I dont see that problem (or I am not noticing it).
>
> "jason" wrote:
>
>> hi,
>>
>> How to make datagrid flicker-free? I have tried to set ContorlStyle
>> double
>> buffering options, but seems not working well.
>>
>> thanks
>>
>>
>>

Top