DataGridView

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  - 1
    - load resources (string-table) from database hi, i like to load the resources (specially the string-table) from a database table. is this possible ? e.g. with a custom resource-loader i know there is such a concept in asp.net (resource provider factory) but i have nothing related found for winforms. thanks, stefan Tag: DataGridView Tag: 103865
  - 2
    - Max form size I have simple form and i try to make it realy big but even when i set max size for example 1200;1200 and i try set my size of my form 1100;1100 it automaticly change it to 1036; 780. I cant make it bigger than this! Can any1 help me? Tag: DataGridView Tag: 103859
  - 3
    - NumericUpDown select contents I am having a hard time trying to select thet contents of a NumericUpDown control when it gets focus. When the control gets focus I want all the contents to be selected so that the user would per default overwrite it when she enters data. Basically I overrode OnEnter and did this.Select(0, this.Value.ToString().Length); (seems a bit cumbersome, but I haven't found a better way of doing it). Nothing happens. MSDN documentation states NumericUpDown should have a Text property, I can't see that it does. It does not have a Selection property either, so if I needed the actual selected numbers I don't see how I would get that. When you TAB into the control the contents is selected (as I want it) so I know this must be possible to do when I select it with the mouse also. Thanks. Tag: DataGridView Tag: 103857
  - 4
    - Prevent form loosing focus How can I get that my form always have focus? TIA Drasko Tag: DataGridView Tag: 103855
  - 5
    - Urgent Help - SMTP mail I have created the send mail application in console application of c#.net 1. When I set my smtp server as some ip address which is a smtp server and when the smtp runs in my local machine where my exe resides, the mail is sent perfectly. 2. When i specify the ip address of some amtp server in my intranet and when the smtp server is not configured in my local machine whre my exe resides, the send mail fails. My doubts: 1. Eventhough i sent it to the correct ip address of local intranet which is having amtp server , why it is not working? 2. Does it expect to run smtp service in the local machine? 3. Whether smtp has to be configured in local machine. But logically it should not be the case. It should work eventhough the smtp is not configured in the local machine and if it is configured in any other machine which is having amtp server 4. some of the sites specified that the smtp server should be hard coded as "localhost". Is it so? Please help me ASAP. Its urgent Tag: DataGridView Tag: 103852
  - 6
    - Add money to your Paypal account with OPRAH 1#B]L Read this message until the end, and you will find out how the money flows in easy !!!!. Follow the steps and it WILL work. Trust me !!!!!. It's NOT illegal and it is NOT a scam !!!!!. PROVEN ON OPRAH! Reported in the Wall Street Journal!!!! The only thing you need is : - E-MAIL ACCOUNT - PREMIER (FREE) or BUSINESS PAYPAL ACCOUNT - $6 on this account (The only investment) - 30 minutes of your time There is no limit on how much money you can recieve, and you haven't got anything to lose with this Business program. I will explain how it works !!!!!. Follow these 4 easy steps and it WILL work !!!!!. STEP 1 : SIGN UP FOR A FREE PAYPAL ACCOUNT !!!!!. Paypal is a free and safe way to pay and receive money on the Internet. Creating a account is as easy as creating a MSN account. Copy and paste the next line in your Internet browser and sign up. HTTP://WWW.PAYPAL.COM Be sure to sign up for a FREE Premier or Business account and not for a Personal account. You cannot receive CREDITCARD payments with a Personal account and we can't have that. Do we !!!!!. STEP 2 : SENT $6 TO YOUR PAYPAL ACCOUNT This is your only investment to receive the money with ease. With your Paypal account, send $1 to each e-mailadres listed below. !!!!! IMPORTANT !!!!! Be sure to use this SUBJECT : *PLEASE PUT ME ON YOUR EMAIL LIST* when you send the money. 1) martine@pilote.net 2) dexxatol@netcourrier.com 3) armygirl8568@hotmail.com 4) comjii@starband.net 5) sinnek@bellsouth.net 6) nsi@nelasat.com STEP 3 : PUT YOUR E-MAIL ADDRESS ON THE BOTTOM OF THE LIST After you have send $1 to each e-mail address, put your e-mail address on the 6th place. Remove e-mail address number 1, and move each e-mail address 1 step up the ladder. !!!!! IMPORTANT !!!!! BE SURE THAT THE E-MAIL ADDRESS YOU USE IS THE SAME AS YOU USED TO SIGN UP AT PAYPAL. Remember that this is LEGAL. You are creating a service : an e-mail servicelist. STEP 4 : UPLOAD OR COPY THIS MESSAGE TO NEWSGROUPS, FORUMS ETC AND EMAIL IT TO ALL YOUR FRIENDS! There are 32,000 newsgroups. Upload or copy this message to at least 200 newsgroups or forums etc, but ........ remember that the more your upload the more people will see your message and the MORE MONEY WILL FLOW IN. How to upload to newsgroups and forums? : After you have followed step 1,2,3 and 4, save this message (and copy so you can use it again). Use your Internet browser and Outlook Express or another newsreader and try to find FORUMS, NEWSGROUPS, BULLETIN BOARDS, DISCUSSION GROUPS, CHAT SITES and ONLINE COMMUNITIES. Use GOOGLE or use a NEWSERVER. Use every option to post this message. Download PostXpert to send 1 message to more NEWSGROUPS at the same time. !!!!! REMEMBER !!!!! The more you post this message the more MONEY WILL FLOW IN. Why does this Business program work so well !!!!!. Lets asume that from the 200 (or more) messages that you have posted, only 5 people respond, you will have your $6 back that you have invested. Those 5 people will each send at least 200 messages with your e-mailadres on number 4. That's 6 x 6 x $1 = $36. The next 25 people will also send 200 messages with your adres on number 3. That's 36 x 6 x $1 = $216. The next 216 people also send 200 messages with your name on number 2. That's 216 x 6 x $1 = $1296!. Those 1296 people again also send 200 messages with your name on number 1. That will give us a total of 1296 x 6 x $1 = $7,776. Now the last tier! 7776 x 6 x $1 = $46,656!!!!!! This is only a EXAMPLE with 6 reactions. You WILL get MORE responses than that. Remember that most newsservers will leave the posted messages on there servers for about 2 weeks. If you will post your message again, it WILL again start from the beginning. So you can repeat this over and over again. Everyday MILLIONS of people are ONLINE and reading these messages, JUST LIKE YOU RIGHT NOW. I also was sceptical in the beginning and have read a lot of these messages. I also thought that it was bullshit. Until I thought : What the hell!, only $6. What's $6 and a couple of minutes of my time to solve my money problems. !!!!! REMEMBER !!!!! Follow every step, and IT WILL WORK, TRUST ME. !!!!! !!!!! BEST WISHES AND GOOD LUCK !!!!! w)O>+;)<9UVS;F>qaGL<Uq#v`V6(F]- rM;$g+!4IIQ*827?H4 Tag: DataGridView Tag: 103851
  - 7
    - Windows App Freezing I have a muti-threaded windows app that creates child forms in a separate thread which then invoke a delegate on the MDI parent form. I have put all time-consuming tasks on separate background workers like running stored proc, poppulating data grid, etc. I am running VB.Net 2005 on Windows 2000 SP4 and on XP SP2. After a period of inactivity in the app (15-30 minutes), it freezes. The task manager says its running but I cannot switch to it. I tried using the DoEvents method on a timer but that had very strange results - the app was responsive but all the functionailty errored out. I read up on message pumps and STA model. Even though its should be an MTA, when I try and do application.run - it forces me to create the MDIFrm as STA or a Treeview control on it will not register drag-drop events. I am not using application.run but have set the MDIForm as startp form (and not set it to run as single instance so it should be STA). I am not using any COM but am using Infragistics 3rd party grid control and dock manager. Both are .Net components and don't require registering. The MDIForm as a treeview, dockmanger and a tablelayout panel prior to opening child forms. Any ideas why this freezing is occurring? It was much more frequent (even if there was activity) on XP with SP1 but with SP2, it was much less. Please advise. Thanks Anita Tag: DataGridView Tag: 103849
  - 8
    - Installing Windows XP x64 I bought and built a new couputer a few months ago. Part of it was a copy of Windows XP x64 Professional. Every time I have installed the windows I have run into a problem during the Finalizing Installation phase of the installation. During the Saving Settings the installation locks up and stops with a time of 8 or 9 minutes remaining. I have tried switching the CDRom thinking that maybe it was bad. If I just leave it there and see if it will get past it and is just running slow, eventualy the screen saver and eventualy sleep mode kick in and the installation just stops. I am out of ideas as to what it might be. Tag: DataGridView Tag: 103846
  - 9
    - Retrieving the connection string from app.config in VS 2005 How can I retrieve the following connection string from (app.config) using a routine similar to the one I have (at the bottom of the app.config) <connectionStrings> <add name="Coda_Desktop.My.MySettings.CodaConnectionString" connectionString="Data Source=hisqlprod001;Initial Catalog=Membership;Persist Security Info=True;User ID=malpha;Password=password" providerName="System.Data.SqlClient" /> </connectionStrings> <system.diagnostics> <sources> =========================================== Imports System.Data Imports System.Data.SqlClient Imports Microsoft.VisualBasic Imports System.Configuration Public Class Coda_CNN Public Shared Function GetConnection() As SqlConnection Return New SqlConnection(GetConnectionString) End Function Public Shared Function GetConnectionString() As String ' Dim sCon As String = ConfigurationManager.ConnectionStrings("CodaConnectionString").ConnectionString Return sCon End Function End Class Tag: DataGridView Tag: 103844
  - 10
    - WebBrowser control and clearing/deleting cookies I have an application that uses an instance of the WebBrowser control. This WebBrowser instance stays active and is never closed while the application runs. I need advice on how to delete the cookies used by the WebBrowser control. The plan is for the application to "timeout" after a short time (30 seconds) and return to a clean state -- with all cookies from the prior session deleted or cleared, regardless of the expiration dates set on those cookies. I need to clear the cookies used by the WebBrowser instance. I have tried the following with no success: 1. webBrowser1.Document.Cookie = ""; 1.a. webBrowser1.Document.Cookie = null; For both of these, webBrowser1.Document.Cookie was unaltered, it did not change. 2. Parse webBrowser1.Document.Cookie into a System.Web.HttpCookieCollection, then iterate through the cookie collection, setting cookie.Expires to a date prior to today. Then write these cookies back to webBrowser1.Document.Cookie. This resulted in webBrowser1.Document.Cookie having duplicate cookie items, but without expires. One idea may be to delete the cookies via the file system. Tag: DataGridView Tag: 103843
  - 11
    - ClickOnce App Won't Start I've got a client with a computer on which no ClickOnce app will start when run with a URL command line. The OS is Win 2003 Server. If I try to run an app directly from the user's cache (<user dir>\Local Settings\Apps\2.0) it will work. My first thought was a permissions issue. So I added the URL to the 'Trusted Computers' list and upped the permissions for all apps on that list to Full Trust. Still no luck. No error message, nothing in the event logs, just nothing. I've tried uninstalling the apps as well - and I can't uninstall them. Nothing happens when I try. I've also uninstalled/reinstalled the .NET 2.0 runtime. Until recently, the machine had no problems running these apps. I've enabled CLR logging, but it doesn't appear to contain any useful info: -------------------------------------------------------------- CLR Loading log for C:\Program Files\Internet Explorer\iexplore.exe Log started at 4:15:06 PM on 8/15/2006 ----------------------------------- Host supplied values (usually set via CorBindToRuntime) ----------------------------------- ----------------------------------- Default version of the runtime on the machine: v2.0.50727 Decided on runtime: v2.0.50727 -------------------------------------------------------------- Any help would be greatly appreciated. Kelly Harrison Small Business Software Shop Tag: DataGridView Tag: 103842
  - 12
    - yes/no If i want to add a checkbox and store the answer in my SQL Express database, do i just ad it as an integer to the database and check the value say 0 for no 1 for yes? or is there an easier way? Tag: DataGridView Tag: 103841
  - 13
    - MenuStrip not showing when form opens Hi, When I run my app, the MenuStrip at the top of the form does not show (actually it's transparent) until I move the form (drag it by at least 1 pixel). Is it a bug? Is there a solution to this behavior? I looked at the menu's events and the form's events, but nothing suspicious, so it must be from a property or a bug... There's no user pointing on the form except from 2 user controls that draw themselves and nothing else so I don't think they can be the source of the problem. So, a known bug? a solution? Thanks ThunderMusic Tag: DataGridView Tag: 103840
  - 14
    - ClickOnce updates and Data folder Hi, I am settings up my application to work with ClickOnce deployment. However, after instlling installing an update, the database doesn't get copied. I tried everything I could think of. It is a SQL Server Express database created in ClickOnce data folder (ApplicationDeployment.CurrentDeployment.DataDirectory). I use User Instances, that is, I connect directly to the database file. So, I install version 0.7.0.0, run it, it creates a new database, I add data to it. Then, I update to version 0.7.1.0. The database doesn't get copied so I loose my data. I made sure the database is detached before updating but it doesn't help. Any ideas? I'm clueless on this one. This is the database that *should* get copied: C:\Documents and Settings\Etienne\Local Settings\Apps\2.0\Data\W596OLLL.TL5\5YR6XOT1.HHP\form...app_dafda4b6e62d7a1b_0000.0000_422f5ed55aef8e45\Data\FormanaDB.mdf (and log file) Also, I create manifests manually using Mage tool because of Visual Studio limitations. btw, I can't find much on google about ClickOnce issues, anybody know of active ClickOnce forums or something? Thanks, Etienne Tag: DataGridView Tag: 103836
  - 15
    - Refresh Binding Hi, I have a Typed DataSet that is bind to some winform controls. TextBox, Labelx etc.... At some point, my dataSet values are updated being the scene. The probleme is that my binded controls are not updated automatically when DataSource is updated. What I have to do to force the rebind of my controls ? ..Etienne Lefrancois Tag: DataGridView Tag: 103835
  - 16
    - ComboBox onSelectedIndexChanged Event Hello, I am working on three comboboxes Country, State and City. When Country is filling with database its onSelectedIndexChanged event fires for each binding, why? I fill State combobox for the selectedvalue of country. for the matter above of onSelectedIndexchanged, first time in SelectedValue of Country combobox is "System.Data.DataRowView". Nest time it shows balnk value and through and exception of zero based index. I am very worry about it. Please as soon as possible. Regards, Ather Ali Shaikh Tag: DataGridView Tag: 103833
  - 17
    - Form to COM Hello, I have a Form derived class (in a class library project), and I want to use this class in an MFC application (via COM). How do I do it? I'll appreciate a step by step tutorial. Thanks, Janiv Ratson. Tag: DataGridView Tag: 103832
  - 18
    - Creating a Windows App version of a Web App I have a fully functional web app that I created in Visual Studio 2003. I've even managed to translate it to a functional working 2005 version. What are the best steps to creating a Windows based form version in a manner that I can preserve a lot of the routines that I have written? For example, I have a connection string in a WebConfig file that I refer to in my Data Access Layer. I didn't use the graphical objects to do this, I wrote most of the code and I would like to use this setup to take a lot of business logic along for the ride: For example, this routine fils a DataGrid on a Patient Screen with Lab results Public Shared Function GetLabs (ByVal lMRN as integer) as dataset Dim conMembers as SqlConnection = GetMembershipConnection() Dim strLabsSQL as string strLabSQL = "SELECT Proc_Name as [Lab Procedure], Comp_Name " _ & "as Component, Result " _ & "FROM tbl_Lab " _ & "WHERE MRN = @MRN " _ & "ORDER BY Result_Date desc" Dim cmdGetLab as new sqlCommand(strLabSQL, conMembers) cmdGetLab.CommandType = CommandType.text Dim daLab as New SqlDataAdapter daLab.SelectCommand = cmdGetLab Return dsLab End Function '============================= I know there are new graphical ways to do this, but to save time, I would like to use the types of tools I have already created, and not spend time trying to learn about a more simple redesign using the new graphical tools. Unless their is a simple way of illustrating how I could change the above sample. The majority of my tools are setup this way. We are trying to quickly migrate into a stand-alone desktop version which connects to a subscribed replicated SQL Express version. A replacement for my connection reference in WebConfig setup using the AppConfig tool would be very valuable. Thanks! Tag: DataGridView Tag: 103827
  - 19
    - Context menus on TextBox and RichTextBox Hi, I am using a RichTextBox and I would like to have the standard context menu (RightClick menu) that the standard TextBox control has (i.e. if you use TextBox instead of RichTextBox, there is a standard context menu with Cut, Copy, Paste and few other selections right out of the box, you don't need to do anything). However, this is not available (at least not right out of the box) for the RichTextBox. I tried to find a property or a method to enable this but could not find anything - it looks like I need to implement the context menu. Not that it is a big deal, but all I need is exactly what's in the TextBox context menu, and I wonder if there is an easier way to enable it. Thanks, Ivan Tag: DataGridView Tag: 103825
  - 20
    - Treenode - line through it I have a situation where there is stuff in the database that I want to display but make sure the user know's it's been disabled. Ideally I'd like to draw a line through the item. Is there a way to do this? TIA - Jeff. Tag: DataGridView Tag: 103823
  - 21
    - How to host CHM help viewer in an MDI child form? I am writing a Windows Forms application using VS.NET 2003 and C#. The application uses the Multi-Document Interface (MDI) style. Our customer education team requires that the application display context-sensitive help using the common CHM file format. We are currently using P/Invoke as follows to display the help file: [DllImport( "HHCtrl.ocx" )] public extern static int HtmlHelp( int hwnd, string pszFile, int cmd, int data ); protected const int HH_HELP_CONTEXT = 0x000F; virtual protected int DisplayHelp( int helpID, string fileName, string helpName ) { // Open the HelpViewer window. int res = HelpControlBase.HtmlHelp( 0, fileName, HH_HELP_CONTEXT, helpID ); return res; } This launches a new form in a child process. We now need to have the CHM help content be hosted in an MDI child form so that the child form can be managed like all of the other child forms. I have searched without success for information on how to do this. How can I display the CHM help content in an MDI child form? Is there a .NET solution for this? Thanks, Dave -- Dave Leach Agilent Technologies, Inc. Tag: DataGridView Tag: 103821
  - 22
    - TextBox OnKeyUp/Down, ProcessCmdKey acting up... a lot I'm writing a hotkey selection control, which inherits from a TextBox. It seemed to work fine for a while, but I ran into a huge bug today. The KeyCode/KeyData values are completely whack, I get the same results with KeyUp/KeyDown event handlers and overriding ProcessCmdKey(). Lets say I press "7" (not the numpad 7), and examine the KeyCode/KeyData values on the first line of ProcessCmdKey. I get this... keyData = LButton | RButton | MButton | ShiftKey | Space That's when I press and quickly release a single "7". Numpad 7 gives 0x67, looks sensible... The caret key, next to return (on a Swedish keyboard) gives: RButton | Back | ShiftKey | Space | F17 What the hell is going on? Anybody with a clue? Some keystrokes (such as most letters) work just fine. Thanks in advance /Thomas Tag: DataGridView Tag: 103820
  - 23
    - Which is the sequence of events when using ShowDialog()? Hi all, I'm having troubles with a Symbol 9000 device (Compact Framework v 1.1) when activating the barcode scanner from a window. The problem is related to the Activated event of the form which carries the task of the initializing the scanner. It looks like this event is not called after the creation of one of the forms. Let me describe shortly the sequence of form creation. The app first call a browsing form by using ShowDialog(). This browsing form (modal dialog) calls a data input form that uses the scanner device using ShowDialog(). It works as expected. On the Activated event it captures the scanning device and on Deactivate releases it. This forms is also a modal dialog. From this data input I call a third data input form also by using ShowDialog(). Note it is the third on the "stack" of called modal dialogs. The Deactivate event is called for the second form and the scanner is released, but the Activated event is not called for this third form then the scanner is not activated. To get the Activated event called I should make a trick: The three modal dialogs are represented on the taskbar as buttons. I can click the button of the second form. It is displayed but is blocked for input. But in this click the Deactivate event is called for the third form and the Activated is called for the second. Then I click the button on the taskbar for the third form and voila! the Activated event is called for the first time for the third form, resulting in the scanner device being activated. I should note that the handlers for these events are registered in the Load event handler. The Load event handler is registered on InitializeComponent as normally it is created from the Visual Studio 2005. I fear the Activated event is called before the Load when the handler is not registered yet. What can be wrong? Which is the sequence of events when using ShowDialog()? Any hint is welcomed Thanks in advance Sammy Tag: DataGridView Tag: 103817
  - 24
    - Finding text from a single cell in a datagridview Hi, I have a datagrid view that I have manually bound with a dataset. It has a column displayed as checkboxes, what I want to do is update the database when a checkbox is checked. To do this I need to find a value at cloumn index = 0 that corresponds to the row in which the checkbox has just been checked. Here is what I have: private void dgErrorLog_CurrentCellDirtyStateChanged(object sender, EventArgs e) { int row = dg.CurrentCell.RowIndex; int col = 0; string loc = // Text in cell (0, row); } So when the checkbox value changes, i find the row index of it. The problem is now that i don't know how to set the text in cell (0, row) to a useable string. Any ideas? Thanks. Tag: DataGridView Tag: 103814
  - 25
    - Re: Slow drawing speed of WinForms (esp via COM interop) - SOLVED On Tue, 18 Jul 2006 15:57:37 +0100, in microsoft.public.dotnet.framework.windowsforms you wrote: >Hi, > >Has anybody experienced severe slow-down with the drawing speed of >WinForms? It's not fast at the best of time, but the particular >scenario I am having problems with is via COM interop and Excel. > >The structure is: > > > Excel VBA macro > | > V > instantiate and call a COM wrapper class exposed > by my assembly using ComVisible(true) > | > V > Wrapper class instantiates the WinForm > and displays it > > >The forms don't do anything special, they contain maybe 10-20 >controls, including one or two grids, but you can sit there and watch >them paint themselves control-by-control. > > Phil I finally got chance to take an indepth look at this problem this morning, and much to my surprise, I have actually solved it without too much trouble. The problem was not related to Debug vs Release mode, order of form painting events, in process vs out of process COM servers, BeginUpdate()/EndUpdate, SuspendLayout()/ResumeLayout(), SuspendBinding()/ResumeBinding() or any other "usual suspect". It was purely a problem within the WinForms engine when it comes to painting forms. I proved this by creating a simple form and dragging about 20 controls onto it. Display this form via a COM interface and the painting speed is terrible (checked list boxes are particularly bad), run it by double clicking the EXE from within Windows Explorer and the painting speed was great. So what's the difference? It turns out that the problem is related to these 2 magic lines that VS2005 puts at the beginning of the Main method in every Windows Forms application: Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); You know, the 2 lines that you mentally tune out because they are always there and you never need to edit them and they run first before anything happens because Main is the entry point for your application... However, if you are allowing callers to display forms via a COM interface then you have multiple potential entry points to your assembly, and Main is actually unlikely to be the first method to run. For example, here is a COM interface in a test app I wrote: [ComVisible(true)] [Guid("33F6DDA9-0D4D-4276-AC8D-C66E315649F2")] [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)] public interface IShowForms { void ShowForm(); } [Guid("3649EC0C-8F49-4844-B2F0-EF154E2D10AF")] [ClassInterface(ClassInterfaceType.None)] [ProgId("COM.ShowForms")] [ComVisible(true)] public class ShowForms : IShowForms { public void ShowForm() { using (Forms.frm1 f = new Forms.frm1()) { f.ShowDialog(); } } } You can instantiate and run this from VBA using the following: Dim f As COM.IShowForms Set f = New COM.ShowForms f.ShowForm If you do this, then those magic 2 lines don't get called and the painting performance is pathetic. So to solve the slow painting problem we need to ensure those 2 lines are run (the WinForms engine also requires that the 2 lines are run before any forms are displayed and that they are only called once). My quick and dirty solution is to add a static variable and method to the Program class: private static bool m_VisualStylesHaveBeenSet; public static void SetVisualStyles() { if (!m_VisualStylesHaveBeenSet) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); m_VisualStylesHaveBeenSet = true; } } Then adjust Main to call this method, and ensure that the constructor of every class which is exposed via COM also calls it: static void Main() { SetReferenceToConfigFile(); SetVisualStyles(); Application.Run(new frmMain()); } public ShowForms() { Program.SetVisualStyles(); } This is a tolerable solution at the moment because I only have about 5 COM-exposed classes, but a better solution might be to try and call it when the assembly is loaded. By the way, it's actually the call to EnableVisualStyles() which is the one which gives the performance boost, the other line doesn't seem to make any difference. I have had a look at the code for the EnableVisualStyles() method in Reflector, and it doesn't seem to do much so the reason for the poor performance is still unknown to me. I suspect it is hidden deep in the WinForms engine, and may be operating system related (I am on XP Pro SP2). Happy interopping! -- Phil Tag: DataGridView Tag: 103813
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  - 1
    - PropertyGridInternals.MergePropertyDescriptor returns null value I've specialised a System.ComponentModel.TypeConverter class to handle a bespoke object which I need to display on a PropertyGrid. I override the GetStandardValues fnt and retrieve the currently displayed object using -- myObj = context.PropertyDescriptor.GetValue(context.Instance) as myObjType; This works great if only one item is added to the propertyGrid eg. myPropertyGrid.SelectedObject(myPropsToDisplay); But, if I add multiple objects to the propertyGrid eg. myPropertyGrid.SelectedObjects(myPropsToDisplayArray); the context.PropertyDescriptor.GetValue(context.Instance); returns null. Is this a bug or am I missing something? Thanks for any help. Tag: DataGridView Tag: 103812
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    - How to set ImeMode for the datagridviewtextboxcolumn? How to set ImeMode for the datagridviewtextboxcolumn? I want to disable ime each cells on datagridview when editing. Tag: DataGridView Tag: 103807
  - 3
    - Using .NET dll as COM component in MFC MSI Application Hello, I have written a class library (dll) using csharp and VS2005. Now, I want to use this class as COM in my MFC application. I'm looking for a step-by-step information on how to do it, consiting the two parts: 1. Exporting a class library as COM component. 2. Using the COM component in my MFC MDI application. Thanks in advance. Janiv Ratson. Tag: DataGridView Tag: 103802
  - 4
    - message queue Hi Here is my problem: I have a control that does one thing when it is clicked and something else when it is double clicked. However the click event is always fired before the double click event. Is there any way I can look at the message queue for this control and determine if the next message is a double click and therefore disregard the click event? Tag: DataGridView Tag: 103797
  - 5
    - Can you Add a ActiveX control in another thread and show it on a form I have a third party active X control which I am using. Some functionalities require a bit of processing (loading and manipulating files). Since I (or I don't know how to do otherwise) need to add the control using the same thread as the UI, when it loads the file it locks up the painting of the form until the control is finished. Is their a way to have the control loaded in another thread then the form which holds it? Thanks Tag: DataGridView Tag: 103796
  - 6
    - List of items WinForms can do that WebForms cannot I would like to build a WinForm demo form (perhaps MDI) to log and demonstrate the various controls, events, etc that WinForms can do that WebForms cannot. This is intended as an objective way to compare the various features, pluses and minuses of each paradigm. I would intend to post this form to CodeProject for anyone to see. Subsequently, perhaps I or someone else could do the same for WebForms. For now, here are a few things I thought of (and I could be in error; that's the point your help). 1. System tray 2. Notify icon and functionality 3. Popup windows (like Outlook) for new mail arrivals 4. Scroll bars 5. F1 Help 6. MDI 7. Drag/Drop Thanks, Dean S Tag: DataGridView Tag: 103795
  - 7
    - delay in drawing controls during loading of form Hi, I have a form (C#) which has multiple controls on it (picturebox, tab controls, etc). When the form begins to draw on its initial load, the background is drawn with all the controls being transparent. Then each of the controls seem to be drawn one after another. Is it possible to make it that the form (and all the controls) draws at once. Kinda like DoubleBuffering if I was doing a OnPaint. Thanks Tag: DataGridView Tag: 103794
  - 8
    - How to unescape HTML string I have a simple question, is there an easy way in .NET to unescape HTML characters? for example I have a string "Siebel Analytics Sr Consultant-&quot;Partner w/ Deloitte &amp; have the oppty to become a Partner&quot;" and I want to have "Siebel Analytics Sr Consultant- Partner w/ Deloitte & have the oppty to become a Partner" Thank You Tag: DataGridView Tag: 103791
  - 9
    - Language toolbar Each time I log on to windows, the language Toolbar is on the taskbar; and every time I log on, I remove it. How can I get it to stay off? Tag: DataGridView Tag: 103787
  - 10
    - Is it possible to display deleted row(s) in DataGrid Is it possible to make the DataGrid shows a row with RowState == DataRowState.Deleted? (e.g. display a deleted row using another color and allow user to undo the deletion) thanks Tag: DataGridView Tag: 103786
  - 11
    - Customizing the WebBrowser control I am embeding the WebBrowser in my application to show reports. I would like to embed the graphics and the CSS files in a resource. To do this I need to "hook" the WebBrowser control so that when it goes looking for these files, I can give it the files from the resource. Any thoughts on how to do this? It does NOT look possible, at the moment. Sam Tag: DataGridView Tag: 103785
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    - TopMost - affects realtime? Suppose I have a form that loads with TopMost = True. If I change the form to TopMost = False will it immediately affect the form -- in other words is TopMost dynamic? The reason I ask is that I want to disable TopMost when I'm displaying a Msgbox (otherwise the message box appears behind my form). Rob. Tag: DataGridView Tag: 103784
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    - OpenGL canvas in windows forms application Hi all, I need an opengl (2.0) canvas in a windows forms application using c++. How can this be accomplished? I didnt find any ressources on the web... Thanks in advance Philipp Tag: DataGridView Tag: 103783
  - 14
    - WebbrowserControl: Position of images in frame/iframe Hi All, I have a web browse control hosted in a windows form. I want to calculate the coordinates of all the images present in the web page displayed in the webbrowser. I am adding all the documents(main document and the iframe/frame documents) in a HTMLDocument list on the NavigateComplete2Event. I am using GetClientRects() to find the coordiantes. >From these documents I am able to get the correct image position if it is the main browser document( i.e. when browserControl.Document.url = documentFromList.url), but for other documents, it gives the displaced image coordinates. The image, top-left coordinate returned for such documents is usually wrt (0,0).However, they return correct anchor coordinates. Is there any other approach by which I can get the correct coordinates for the images in iframe/frames? Thanks, Nupur Tag: DataGridView Tag: 103781
  - 15
    - ListView sort only sorts on paint? Has anyone notices this behavior? I have a composite control that contains a listview. I've created my own listviewsorter class that works just fine. As items get added (in this case - a very small #, less than 40), I repaint all items background to white, sort, and perform a colorization. The code was supposed to colorize some things in an alternating pattern, but i noticed sometimes it wasn't alternating. What I found was although my colorization colored the correct items - the sort wasn't happening until the parent that housed the composite control got redrawn!!! I tried a Refresh, an Update, a ResumeLayout, RedrawItems, etc. Nothing got this to work with the listview. I did code around it myself with a sortedList, but I find it odd that when I call ListView.Sort it just seems to queue up the sort for the next paint operation. Am I mistaken? Does anyone know how this really works? Tag: DataGridView Tag: 103780
  - 16
    - DataGridView CellValueChanged event not firing I have a DataGridView that is bound to a list of objects through it's datasource property. If a cell in the grid is changed by editing directly in the cell I get a CellValueChanged event. If the value is changed in the underlying object that causes the cell in the grid to get changed then the CellValueChanged event does not occur. Does anyone know of a way to detect a cell value changing for both cases? I would like to detect the value change without leaving the row since I am trying to give immediate visual feedback regarding the validity of the data being entered and don't want the user to have to leave the row to find out if data in a cell is valid. Tag: DataGridView Tag: 103777
  - 17
    - Question about SizeDataGridColumnToContent function... Using C# string xmlfile = "appsettings.xml"; DataSet ds_login = new DataSet(); ds_login.ReadXml(xmlfile); dgConnection.DataSource = ds_login; dgConnection.DataMember = "Connection"; SizeDataGridColumnsToContent(dgConnection, 1); The function works the way it is suppose to for every other datagrid I have. But for the one bound to the dataset with the XML I get an extra column added. the column is Connections_Id where Connections is an element name... The column DOES NOT show up if I don't use the SizeDataGridColumnsToContent function. here is the function: public void SizeDataGridColumnsToContent(DataGrid dataGrid, int nRowsToScan) { //first check to make sure the DataGrid has a valid datasource if (dataGrid.DataSource == null) { //it does not return; } // Create graphics object for measuring widths. Graphics Graphics = dataGrid.CreateGraphics(); // Define new table style. DataGridTableStyle tableStyle; //necessary b/c of the DataSet looping int nRowsToScanOriginal = nRowsToScan; bool scanAllRows; if(-1 == nRowsToScan) scanAllRows = true; else scanAllRows = false; try { if (dataGrid.DataSource.GetType() == typeof(DataSet)) { DataSet dataSet = (DataSet)dataGrid.DataSource; if(dataSet.Tables.Count == 0) { //if the DataSet it empty, nothing to do return; } // Clear any existing table styles. dataGrid.TableStyles.Clear(); foreach(DataTable dataTable in dataSet.Tables) { if (scanAllRows) { nRowsToScan = dataTable.Rows.Count; } else { // Can only scan rows if they exist. nRowsToScan = System.Math.Min(nRowsToScanOriginal, dataTable.Rows.Count); } // Use mapping name that is defined in the data source. tableStyle = new DataGridTableStyle(); tableStyle.MappingName = dataTable.TableName; // Now create the column styles within the table style. DataGridTextBoxColumn columnStyle; int iWidth; for (int iCurrCol = 0; iCurrCol < dataTable.Columns.Count; iCurrCol++) { DataColumn dataColumn = dataTable.Columns[iCurrCol]; columnStyle = new DataGridTextBoxColumn(); columnStyle.TextBox.Enabled = true; if(dataColumn.Caption != "") { columnStyle.HeaderText = dataColumn.Caption; } else { columnStyle.HeaderText = dataColumn.Caption; } columnStyle.MappingName = dataColumn.ColumnName; // Set width to header text width. iWidth = (int)(Graphics.MeasureString (columnStyle.HeaderText, dataGrid.Font).Width); // Change width, if data width is // wider than header text width. // Check the width of the data in the first X rows. DataRow dataRow; for (int iRow = 0; iRow < nRowsToScan; iRow++) { dataRow = dataTable.Rows[iRow]; if (null != dataRow[dataColumn.ColumnName]) { int iColWidth = (int)(Graphics.MeasureString (dataRow.ItemArray[iCurrCol].ToString(), dataGrid.Font).Width); iWidth = (int)System.Math.Max(iWidth, iColWidth); } } columnStyle.Width = iWidth + 4; // Add the new column style to the table style. tableStyle.GridColumnStyles.Add(columnStyle); } // Add the new table style to the data grid. dataGrid.TableStyles.Add(tableStyle); } } else if(dataGrid.DataSource.GetType() == typeof(DataTable)) //the datagrid just has a DataTable { tableStyle = new DataGridTableStyle(); DataTable dataTable = (DataTable)dataGrid.DataSource; if (-1 == nRowsToScan) { nRowsToScan = dataTable.Rows.Count; } else { // Can only scan rows if they exist. nRowsToScan = System.Math.Min(nRowsToScan, dataTable.Rows.Count); } // Clear any existing table styles. dataGrid.TableStyles.Clear(); // Use mapping name that is defined in the data source. tableStyle.MappingName = dataTable.TableName; // Now create the column styles within the table style. DataGridTextBoxColumn columnStyle; int iWidth; for (int iCurrCol = 0; iCurrCol < dataTable.Columns.Count; iCurrCol++) { DataColumn dataColumn = dataTable.Columns[iCurrCol]; columnStyle = new DataGridTextBoxColumn(); columnStyle.TextBox.Enabled = true; if(dataColumn.Caption != "") { columnStyle.HeaderText = dataColumn.Caption; } else { columnStyle.HeaderText = dataColumn.ColumnName; } columnStyle.MappingName = dataColumn.ColumnName; // Set width to header text width. iWidth = (int)(Graphics.MeasureString (columnStyle.HeaderText, dataGrid.Font).Width); // Change width, if data width is // wider than header text width. // Check the width of the data in the first X rows. DataRow dataRow; for (int iRow = 0; iRow < nRowsToScan; iRow++) { dataRow = dataTable.Rows[iRow]; if (null != dataRow[dataColumn.ColumnName]) { int iColWidth = (int)(Graphics.MeasureString (dataRow.ItemArray[iCurrCol].ToString(), dataGrid.Font).Width); iWidth = (int)System.Math.Max(iWidth, iColWidth); } } columnStyle.Width = iWidth + 4; // Add the new column style to the table style. tableStyle.GridColumnStyles.Add(columnStyle); } // Add the new table style to the data grid. dataGrid.TableStyles.Add(tableStyle); } } catch(Exception e) { MessageBox.Show(e.Message); } finally { Graphics.Dispose(); } } Here is the XML file also if that helps... <?xml version="1.0" encoding="utf-8" ?> - <AppSettings> - <DatebaseConnections> - <Connection> <Server>DSS-SERVER3</Server> <Database>ClientScanTest</Database> </Connection> </DatebaseConnections> - <LoginSettings> <Admin>GaKFQUS2Oo92F6byJQGbEg==</Admin> </LoginSettings> </AppSettings> This is the Output also... Server Database DatabaseConnections_Id DSS-SERVER3 ClientScantest 0 as seen in the datagrid the dataset is bound to. Tag: DataGridView Tag: 103775
  - 18
    - Select a row of a DataGridView control with a certain column value Hi all out there, how can I select a row of a DataGridView control with a certain column value? What I need is something like a "RowDataBound" event, but I did not found this functionality in the DataGridView control. Background: I've got a DataGridView connected to a BindingSource. The User changes the sorting and then selects a row and hits the Edit button. Another form opens in which the user edits the detail data. If the detail form is closed, the data of the first form should be updated and then the originally selected row should be again selected (more exactly: the row with a certain value in a column, lets say where id=27). Thanks a lot for your help Ulrich Tag: DataGridView Tag: 103774
  - 19
    - Video Capture Hi, hope someone can help. I am trying to capture video in my application. I have been using Capturepro by Pegasus. However it is very slow when doing the initial connection to the camera. Does anyone know of a component that is quicker? Thanks in advance. Dave Tag: DataGridView Tag: 103767
  - 20
    - Textbox Control Hello, I have a textbox with data in it that extends beyond the size of the text box. I am looking for a way to display the data in the textbox with the data scrolled all the way to the right: Before: ------------------- | Peter Piper| ------------------- After What I Want: ------------------ |led Pickels.| ------------------ The text is justified to the right (I already tried it with setting the text justification to the right with no luck). Thanks, Chuck Tag: DataGridView Tag: 103761
  - 21
    - ReportViewer Control Local Report not showing all records/rows I am dynamically creating a ReportViewer control and loading a local report. After adding appropriate datasources, the ReportViewer intermittently does not show all the rows/records that should be displayed (e.g. only showing 2 when there should be 4). Refresh will usually correct the problem but that is not a preferred fix. Anybody else run into this and have a solution? Thanks. Darrin McQuay Tag: DataGridView Tag: 103757
  - 22
    - Tooltip Font Hi all, I'm writing a program where I have to draw custom tooltips onto a control through OnPaint. I've figured out how to get the text color and the box color (KnownColor.InfoText and KnownColor.Info), but I can't find anywhere how to figure out what the font is. I've looked through the WinAPI and others...maybe I'm just missing it, I dunno. Seems like it should be there somewhere, though. (These are what the user would set through the display settings in Windows.) Thanks in advance for any help. Tag: DataGridView Tag: 103756
  - 23
    - How to override Combobox drop-down effect I am trying to prevent the combobox from dropping down; how do I override this effect? Thank you. - ed Tag: DataGridView Tag: 103755
  - 24
    - DSOFramer and .NET Menus Apologies for the cross-posting - not sure where best to post...... Okay, this might be a shot in the dark since there are very few (positive) postings regarding the DSOFramer control but I'll give it a shot posting my problem anyway.... I'm trying to use the DSOFramer in a Visual Studio 2005 Windows Forms project (using C#). The configuration is simple. Using the standard tools provided with Visual Studio I have a main menu at the top with a toolbar just under it. A status bar is docked to the bottom and in the middle docked "fill" is the DSOFramer control. I am loading an Excel spreadsheet into the DSOFramer control. Here's the problem: 1. Click the "File" menu item from the main menu in the Windows Form (not the File menu in exposed by Excel). 2. Leave the menu in the expanded, dropped-down state. 3. Click anywhere on the Excel spreadsheet in the DSOFramer control. 4. The menu DOES NOT collapse. I have tried a number of combinations: .NET 1.1, third-party menu controls. Nothing works. The only control combination that does work is using Visual Studio 2003 and using the standard MainMenu control provided by Visual Studio. This seems to work okay HOWEVER, this control is very bland (does not allow for command icons) and is not useful for my project. In order to debug the problem I have also tried the following: 1. Capture EVERY event exposed by the DSOFramer control. No events are fired (such as Leave and Enter) when I click on and off of the hosted spreadsheet. 2. Ran the program using Spy to see what Windows messages were being sent. It appears WM_NOTIFYPARENT is sent but apparently .NET 2.0 ignores it (as does .NET 1.1). I'm no expert on Windows messages so perhaps I'm missing something rather than .NET! Any and all help is much appreciated. Tag: DataGridView Tag: 103753
  - 25
    - determine which control will get the focus When handling the Lost_Focus event, is there a way to determine which control will get the focus before leaving the Lost Focus handler ? and then prevent the current control to not loose the focus ? Tag: DataGridView Tag: 103752

Hello

what's the best to clear (delete) the content of a DataGridView ?
I didn't find any methods to do this.
Thanks for your help

Philippe

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Re: DataGridView by Dave

Dave
Thu Aug 17 12:41:01 CDT 2006

Hi Philippe,

If your bound to a data source clear the source or set the DataSource property = null. Otherwise, try calling Clear() on the Rows
property.

--
Dave Sexton

"gptvitsion" <gpvision@wanadoo.fr> wrote in message news:%239B2uxSwGHA.1224@TK2MSFTNGP03.phx.gbl...
> Hello
>
> what's the best to clear (delete) the content of a DataGridView ?
> I didn't find any methods to do this.
> Thanks for your help
>
> Philippe
>

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