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- Previous
  - 1
    - BUG and FEATURE REQUEST in designer properties Hi, I have an enum (a bitfield with Flags attribute) that is in a user control and at design time the form does NOT permit setting of multiple bits. Will this be possible in future designers? Thanks. Tag: lbhappy@263.net Tag: 62001
  - 2
    - WindowsFormsParkingWindow Can someone tell me some more details about the WindowsFormsParkingWindow?In my application (C#) in full screen mode I must deal with the WindowsFormsParkingWindow.After I switched to full screen mode and click on a child form (after some time) then the WindowsFormsParkingWindow appears.See the code: /// <summary> /// Switch the client to full screen or normal display mode /// </summary> public bool FullScreen { get { return m_infullscreenmode; } set { if(m_infullscreenmode != value) // only commence if the current mode is different from the desired mode. { m_infullscreenmode = value; if(m_infullscreenmode) { this.Menu = null; if(this.WindowState == FormWindowState.Maximized) //gu (new) srs 211 this.WindowState = FormWindowState.Normal; this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; panel1.Visible = false; mFullScreen.Checked = true; Displays.FullScreenSize(this); } else { this.mHide.Visible = false; mFullScreen.Checked = false; this.Menu = MainMenu; panel1.Visible = true; this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Sizable; } if(mFullScreen.Checked) MLog.Info(3, "client.fullscreen"); else MLog.Info(3, "client.normalscreen"); } } } Tag: lbhappy@263.net Tag: 61999
  - 3
    - Opening HTML files Hallo, I would like to make Help files in HTML. The only way I found how to display these files is: Dim pHelp As New ProcessStartInfo pHelp.FileName = "explorer.exe" pHelp.Arguments = "Help.htm" pHelp.UseShellExecute = True pHelp.WindowStyle = ProcessWindowStyle.Normal Dim proc As Process = Process.Start(pHelp) This works under Windows 2000, Windows ME but not under Windows NT. Does anyone have a better approach? Nigel... Tag: lbhappy@263.net Tag: 61996
  - 4
    - reusing winforms in .NET CF Hi, I am working on a GUI intensive application on .NET Cf in C#. Most of my forms have very similar controls and appearance. I have around 5 screens and want to use one base form for all these screens and then customize this form dynamically for each screen. Please suggest me a suitable approach for the design. Any pointers for sample applications will be very helpful. Regards, Vishal. Tag: lbhappy@263.net Tag: 61994
  - 5
    - Bringing a form to focus Hello, I have a launcher for a Windows Form application that will guard against starting an already started application like the following: private static Mutex singletonMutex; static void Main(string[] args) { bool first; singletonMutex = new Mutex(true, "MyApplication", out first); if (first) { // process application startup DoStartup(args); } else { MessageBox.Show("Application already running"); // YUCK! } } Now the question is: How do I avoid using a message box instead bringing the already started application to focus? Thanks for any help. /m Tag: lbhappy@263.net Tag: 61993
  - 6
    - [ANN] Xamlon Beta 1 - XAML for Windows.Forms I am very proud to announce the pre-beta release of Xamlon! Xamlon (pronounced "Zamelon," which rhymes with "avalon"), is a XAML runtime library for the .NET Framework 1.1. Xamlon is not a 100% XAML/Avalon compatible library, it was not designed to be, but rather uses some of the same objects and syntax as XAML to provide the same power and capabilities as XAML but for building "Windows.Forms" applications instead. Simply put: "Xamlon is XAML for Windows.Forms" There are several key benefits of using Xamlon today: a.. Application development becomes much more simple and efficient. Xalmon provides a very clean separation between presentation and application logic. b.. Xamlon application run on all of today's .NET Framework 1.1 Windows operating systems: Windows 98, ME, NT, 2000, XP, and Server 2003. c.. Xamlon provides a much simpler migration path to Microsoft's next-generation presentation layer in Longhorn, XAML. This is an early release so we could get it into the hands of developers. There is little to no documentation, but we'll be updating the web site frequently. For pre-beta 1, Xamlon has basic support for the Application object, Window object, and several other controls including GridLayout, FlowLayout, etc. These are very early stage controls, but will allow you to get started. Of course all Windows.Forms controls can be used, third-party controls, etc. Read over the included examples and source code, and we'll be updating the bits frequently! Enjoy... http://www.xamlon.com/ -Paul Colton Tag: lbhappy@263.net Tag: 61991
  - 7
    - Restoring files from the Recycle Bin Does someone know how can i restore a file from the Recycle Bin using the Shell API?. The thing is that i know how to send files to the Recycle Bin using the SHFileOpertion, but i do not know how to restores the files. Thanks for any help. Tag: lbhappy@263.net Tag: 61989
  - 8
    - Triger an event in the code hi, everybody, Can I triger an event in the code? For example, can I triger a keydown event of textbox? thanks Tag: lbhappy@263.net Tag: 61987
  - 9
    - Decent image control Hi there, I need to show an image centered on a form. That's easy, use a Picturebox... problem is the images may be different sizes, and I need to resize to show the image with the correct aspect ratio (ie: height vs width)... sometimes the image will be too big to fit on the form so then I'd like scrollbars... I need like a "shrink/stretch to fit" method which understands the aspect ratio bit.... Is it me or is the picturebox control pretty useless...? Can anybody suggest a way of achieving what I want with standard .Net controls... or am I going to have to subclass the picturebox (or make my own version)...? Any help appreciated... Cheers Tag: lbhappy@263.net Tag: 61986
  - 10
    - MessageBox does not show up Hi, there, I have a MDI app written in C#. I have a form, then a panel. The objects are drawn on the panel. When I closing the window, I would like to save any changes that was made. The code followed is in Form class: public void ClosingHandler(Object sender, CancelEventArgs e) { if(panel.Document.IsDirty ){ DialogResult save = MessageBox.Show("Do you want to save changes ?","Name", MessageBoxButtons.YesNoCancel); ... } } But the message box would not show up unless I activate another window then come back to my own. Any idea what I am missing here? Thanks in advance for your help. Michael Tag: lbhappy@263.net Tag: 61983
  - 11
    - Control.Update method Hello: I have an application that performs a long process, it shows a progress bar to help users dont get into panic, but, if I move another window over my application's main form, the applications starts looking like if it was "not responding". I try using the Update method, because the documentation says it "Executes any pending requests for painting." But it is not working at all. I tried Refresh(), but it invalidates all the area, and the whole application blinks. Another way i tried is callind Application.DoEvents (), It works, but it also allows users to clik on menus, close windows and I don't want that. Is there any simple way to get the main window repainted? Tag: lbhappy@263.net Tag: 61981
  - 12
    - Moving form with no border I've got a form that has no border (FormBorderStyle.None), and I'd like to move it with the mouse. My solution is below. Is there a better one? Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown MouseDownLoc.X = e.X MouseDownLoc.Y = e.Y End Sub Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove If e.Button = MouseButtons.Left Then Me.Left += e.X - MouseDownLoc.X Me.Top += e.Y - MouseDownLoc.Y End If End Sub Tag: lbhappy@263.net Tag: 61979
  - 13
    - datagrid tablestyles child data Hi, I'm trying to get the tablestyle to populate when I navigate ("drill down") to the child data in a datagrid. I have the tablestyle mappingname set to the child table, but it still uses the "default" (all the cols in the table with their col name) setting. I've tried defining programmatically (clearing all the cols and colstyles and adding one at a time), and setting a couple cols for the tablestyle using the designer, but no luck. On the datagrid navigate event, I see the datagrid.datamember has been switched to the child table, but no luck. Help! thanks, pchak Tag: lbhappy@263.net Tag: 61975
  - 14
    - Please help..... Hi, Could you please take a look and tell me what this means? Cor has tried to help me, but we haven't found it yet. Everytime I run this code, I get an exception error. Here is my code: Dim connStr As String = "Provider=Microsoft.JET.OLEDB.4.0;data source=" & Me.txtFile.Text Dim SQLstr As String = "SELECT * FROM sitelist" Dim cn As New OleDb.OleDbConnection(connStr) Dim da As New OleDb.OleDbDataAdapter(SQLstr, cn) Dim ds As New DataSet pgBar.Value = 0 pgBar.Refresh() da.Fill(ds, "sitelist") pgBar.Value += 1 pgBar.Refresh() dgMain.DataSource = ds dgMain.DataMember = "Sitelist" dgMain.Refresh() cn.Close() 'FileNaam = FileNaam.Replace("sitelijst.mdb", "sitelist.mdf") Dim con As New SqlConnection("Server=(local);database=;Integrated Security=SSPI") Dim cmd1 As New SqlCommand("DROP DATABASE sitelist", con) con.Open() Try cmd1.ExecuteNonQuery() Catch ex As Exception MsgBox(ex.ToString) End Try Dim strSQL As String = "CREATE DATABASE sitelist" Dim cmd2 As New SqlCommand(strSQL, con) Try cmd2.ExecuteNonQuery() Catch ex As Exception MsgBox(ex.ToString) End Try cmd2.CommandText = "USE sitelist " & vbCrLf & _ "CREATE TABLE sites (sitenummer NVARCHAR(10), " & _ "adres NVARCHAR(255), gemeente NVARCHAR(25), " & _ "[Type site] NVARCHAR(25), bsc NVARCHAR(35), " & _ "Safety NVARCHAR(25), [X pos] NVARCHAR(15), " & _ "[Y pos] NVARCHAR(15), verantwoordelijke NVARCHAR(25), " & _ "online NVARCHAR(15), CONSTRAINT [pk_indentFT] PRIMARY " & _ "KEY CLUSTERED(sitenummer))" Try cmd2.ExecuteNonQuery() Catch ex As Exception 'do nothing End Try con.Close() Dim sqlNewstr As String con = New SqlConnection("Server=(local);Database=sitelist;Integrated Security=SSPI;") Dim sqlDa = New SqlDataAdapter sqlDa.SelectCommand = New SqlCommand("SELECT * FROM sites", con) Dim cb As SqlCommandBuilder = New SqlCommandBuilder(sqlDa) cb.QuoteSuffix = "[" cb.QuotePrefix = "]" Dim dstoo As New DataSet sqlDa.Fill(dstoo, "Sites") 'connect the dataset to the empty table Dim ab As Integer Dim dr As DataRow For ab = 0 To ds.Tables(0).Rows.Count - 1 dr = dstoo.Tables(0).NewRow() dr(0) = ds.Tables(0).Rows(ab)(0) dr(1) = ds.Tables(0).Rows(ab)(1) dr(2) = ds.Tables(0).Rows(ab)(2) dr(3) = ds.Tables(0).Rows(ab)(3) dr(4) = ds.Tables(0).Rows(ab)(4) dr(5) = ds.Tables(0).Rows(ab)(5) dr(6) = ds.Tables(0).Rows(ab)(6) dr(7) = ds.Tables(0).Rows(ab)(7) dr(8) = ds.Tables(0).Rows(ab)(8) dr(9) = ds.Tables(0).Rows(ab)(9) dstoo.Tables(0).Rows.Add(dr) 'add the new rows to the table Next dgSec.DataSource = dstoo dgSec.DataMember = dstoo.Tables(0).TableName dgSec.Refresh() MsgBox("continue?") 'just to be able to look at the datagrid If dstoo.HasChanges Then Try sqlDa.Update(dstoo, dstoo.Tables(0).TableName) Catch ex As Exception MsgBox(ex.ToString) End Try End If dstoo.AcceptChanges() 'make all changes permanent dgMain.DataSource = dstoo dgMain.DataMember = dstoo.Tables(0).TableName sqlDa.Fill(ds, "Sites") 'connect the dataset to the table dgSec.DataSource = ds dgSec.DataMember = "Sites" 'check the table for new data con.Close() MsgBox("Ready") 'finished End Sub and this is the message I get on the line "sqlDa.Update(dstoo,dstoo.Tables(0).TableName)" System.Data.SqlClient.SqlException: Line 1: wrong syntaxis at ]. at Microsoft.VisualBasic.CompilerServices.LateBinding.InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn) at Microsoft.VisualBasic.CompilerServices.LateBinding.LateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack) at MDBtoSDF.Form1.btConvert_Click(Object sender, EventArgs e) in D:\VB.NET projecten\PPC\MDBtoSDF\Form1.vb:line 264 I don't have a clue what it all means... rg, Eric Tag: lbhappy@263.net Tag: 61966
  - 15
    - WindowsForms Data Binding Over Internet Hi Guys, I have been doing a lot of research on what is the best architecture to bind a WindowsForms Application to data across the Internet. Scenario: My company is hosting all data in SQLServer2000 and running IIS/ASPNET The Client applications will be deployed outside our network. Its a typical scenario, but seems like there is too many solutions:) Is Remoting a more efficient way to expose all data manipulation objects, does it need to be synchronized from scratch for all data updating and binding?? Should DataSets be serialized to the client and bound to the forms and will they handle the sync? I saw somewhere that in the SQLConnection string, you can put in something like "Server=http://111.111.222.222/" to connect the DataAdapter over internet..is that true? Can anyone please shed some more light?? Thanks a lot. Tag: lbhappy@263.net Tag: 61965
  - 16
    - casting Error Hi I'm trying to put the database column's value in a variable, but when I do this I get this exception Specified cast is not valid. The column accept varchar values. My code is: string reg = odrCrear.GetString("Name").ToString().Trim(); What is wrong??? Regards Tag: lbhappy@263.net Tag: 61962
  - 17
    - Borderless form? I would like to create a MFC project (preferable using the Wizard) that has a borderless, menuless window as the main form. Unchecking basically everything in the Wizard still gives me a border and a menu bar. How do I make it borderless & menuless? Thank you, Richard Tag: lbhappy@263.net Tag: 61960
  - 18
    - Is there an enumeration for the WM_ messages???? If I overload WndProc(), I'll want a switch() in there to act on different windows WM_ messages like WM_MOUSEMOVE and stuff like that. Trouble is, how do I find the value of these constants? I know, I can hunt around in winuser.h for them, but if I'm a VB or C# guy, that's kind of a roundabout solution. The ".net" way of doing this would be to give me an enum that contained all the values. Is there such a thing? I can't find one. Tag: lbhappy@263.net Tag: 61958
  - 19
    - System.Security.SecurityException: Request failed. I'm trying to get my Windows form exe to execute from a web server. Everything works fine on the server itself (my local machine), when I go to any other machine, I get this error. I have used the dotnet Trust An Assembly utility to trust the assembly, and I can browse to the server OK (my local machine). Unfortunately our systems administrators have locked down the security in IE so that it's impossible to add trusted sites, or change any of these settings. I can probably get them to change this, but I'd have to be clear in what I needed changing. Can anybody help. All the samples sem to assume you've got full access to the machine. David Noble Tag: lbhappy@263.net Tag: 61957
  - 20
    - WM_ACTIVATE Hello, In VB6 the WM_ACTIVATE message was not sent to a window when it was activated from an other application (when the application switched). Did this change in VB.NET? Is it now always sent? Tag: lbhappy@263.net Tag: 61953
  - 21
    - selected text highlight and fontdialog Hi, I have some selected text highlighted in a textbox and a right mouse click brings up a context menu which pops up a FontDialog box. Once the FontDialog box is up, I lose the selection highlight on the text. How do I keep the highlight? Thanks, dax Tag: lbhappy@263.net Tag: 61949
  - 22
    - How to Activate() a window I have a Hwnd for a window that I want to bring to the front and give focus. This window is not part of my application, but is being controlled by my app. I get the Hwnd from the applications COM object model. Can I take this Hwnd and give the form focus? Thanks! -- Bobby C. Jones www.AcadX.com Tag: lbhappy@263.net Tag: 61934
  - 23
    - Displaying version info onto a label Hello, I am trying to figure out how to display the applications version information onto a label. How would I do this? -T Tag: lbhappy@263.net Tag: 61932
  - 24
    - Centering an application when starting? Does anyone know how to center an application on the desktop when starting rather than rely on the default location? Tag: lbhappy@263.net Tag: 61927
  - 25
    - [ANN]unofficial Extensibility Application Block Hi Folks. Look here for the full details: http://weblogs.asp.net/rosherove/posts/39484.aspx and here for the download: http://workspaces.gotdotnet.com/eap in a few sentences: This block allows you to incorporate plugins into your application with ease. It also allows to easily create plugins for your application if it uses this framework. intro: Extensibility Application Block overview: One of the demands from a successful application is the abilityto easily adept to the needs of its users if and when they change (and they do). Many times, the required changed, or extra features that need to be added require not only pure development work, but also re-compilation of some or all of the application binaries (this discussion does not include web applications, only winform applications). To avoid having to go through this sometimes painful process just to add a simple feature, or fix a simple bug, a new need has grown - to allow extending an existing application without the need to recompile it or even without the help of the original developer. This is how what we know today as Add-ins and plugins were born. When we moved into the world of .Net, we still have the ability to write applications that can be extended by others. However, there is no clear path, a common way, to design and implement such abilities into .Net applications. If you were to go today and try to build an extensible application, you'll be faced with a myriad of articles and HOW-TOs, each explaining the story a little bit differently than it's predecessor. This Application block was created so that we can start and retain a common ground for how such abilities should be built. So that it can be both easy to understand and powerful enough as to be used by the most demanding applications. The solution I present here is based on my experience writing extensible applications in .Net and on all the things I learned while trying to figure out the best way to achieve specific abilities while trying to maintain a generic approach. How does it work? There are 3 basic principles that need to be implemented in order for an application to have plugins: 1. The application needs a way to recognize and communicate with the plugins 2. The Plugins need a way to talk (or sometimes control) the application in which they are hosted 3. The plugins need to be recognized and loaded at runtime into the host application 1. The application needs a way to recognize and communicate with the plugins This application block solves this problem by providing a common interface that all plugins must implement:IPlugin. The principle is actually very simple: Let's say I have a text editing application to which I would like people to be able to add plugins. These plugins should be able to talk to the application in which they reside, AND the application should be able to talk to them. However, since the application does not know in advance what plugins may be available (some of them may only be created in the future!) the application cannot have a direct reference on any specific DLL or class. It needs to support ANY CLASS but it needs to be able to talk to it on pre-known terms. This paradox is solved by the using a COMMON INTERFACE that both the plug in and the application know. This interface is declared in a separate assembly and both the plug in and the application have a reference to that assembly. This interface is what our application will use to communicate with the plug in. Any plug in that will want to attach itself to the app will have to implement this interface or otherwise we won't even try to load it. This interface is called (in this application block) IPlugin. 2. The Plugins need a way to talk (or sometimes control) the application in which they are hosted This application block solves this problem by providing a base class called AppContext. To the Plugins, AppContext is their one and only link to the outside world. Anything they need to do, anything they need to know, they do it through this class. The host application will hold a class derived from AppContext which has specific methods and properties which should be shared with the plugins. the IPlugin interface contains an Init Method which passes an AppContext instance into the plug in, allowing it to hold a reference to it and using it for what it needs. For example, For an Editor application, We can have an EditorContext class which exposes events such as TextChanged and properties such as SelectedText and so on. The plugins can use these properties to manipulate their outside environment . It all depends on how much the developer decides to expose to the plugins using the AppContext class. The AppContext class is also the class that will load and unload the plugins when the application starts and finishes, but for that it uses yet another class from the application block - the PluginProvider classes which I'll now discuss in the next paragraph. 3. The plugins need to be recognized and loaded at runtime into the host application There are many ways in which one can organize and recognize the plugins that their application needs to load. Some prefer to dynamically search all the DLLs in the app directory and find classes that implement the IPlugin Interface. Some prefer to list the required plugins and their type inside the application config file. Some might have a whole different way of doing this which no one has ever thought of before. This application block is built to support whatever method you choose to load your plugins, and it also provides a couple of implementations right off the bat so you can get up and running in no time with your new application. In the extensibility block there are special objects for which the only purpose in life if to find and load plugins. These are called Plugin Providers. Each plug in provider must implement the IPluginProvider interface. There are several providers already build for you. These include the XmlFilePluginProvider, SectionHandlerPluginProvider and DynamicFindPluginProvider. Each of these implements searching for plugins in a totally different way, but because they all support the same interface, they all return a collection of IPlugin object when they are done allowing you to simply choose the method in which to search. Don't find anything you like in there? Feel like you need an extra feature? Simple implement the IPluginProvider interface in your own class and you're free to go. -- Roy Osherove weblog: http://www.iserializable.com Tag: lbhappy@263.net Tag: 61925
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  - 1
    - Unwanted Focus in TabControl Hi, When I'm using the SelectedIndex property to programmatically change the current TabPage of a TabControl (or controlling it by DataBinding), the corresponding TabPage "steals" Focus. Does anybody know a simple way to avoid this? Thank you in advance! Per Tag: lbhappy@263.net Tag: 61923
  - 2
    - No touch deployment and XP Themes Hi. How do I adopt XP-theme together with no touch deployment? I am using no touch deployment of a windows application (framework 1.1). The problem is when deploying the application through no touch the visual style does not adopt XP-themes. I am using... Application.EnableVisualStyles(); Application.DoEvents(); ... but i do not seems to work. I have also tried to use a Manifest file, but i do not think it is sent to the client computer. Maybe I am doing something wrong!?! Can anybody please help! Thanks in advanced. Tag: lbhappy@263.net Tag: 61919
  - 3
    - Focus form after use popup menu in notifyicon Hello, I have form with notifyIcon and popup menu for notifyIcon. I modified Close event - I hide form instead close. When I clik to icon in systray, form shows. But when I selected item from popup menu over notifyIcon, form shows too - but I don't show it, only run any code. How do I it? Ehh, sorry for my english :/ There is source code (I wrote it in C#Builder Personal): using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace Project1 { /// <summary> /// Summary description for WinForm. /// </summary> public class WinForm : System.Windows.Forms.Form { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components; private System.Windows.Forms.NotifyIcon notifyIcon1; private System.Windows.Forms.ContextMenu contextMenu1; private System.Windows.Forms.MenuItem menuItem1; private bool closeFromMenu; private System.Windows.Forms.MenuItem menuItem2; public WinForm() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // closeFromMenu = false; } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose (bool disposing) { if (disposing) { if (components != null) { components.Dispose(); } } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.components = new System.ComponentModel.Container(); System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(WinForm)); this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components); this.contextMenu1 = new System.Windows.Forms.ContextMenu(); this.menuItem1 = new System.Windows.Forms.MenuItem(); this.menuItem2 = new System.Windows.Forms.MenuItem(); // // notifyIcon1 // this.notifyIcon1.ContextMenu = this.contextMenu1; this.notifyIcon1.Icon = ((System.Drawing.Icon)(resources.GetObject("notifyIcon1.Icon"))); this.notifyIcon1.Text = "notifyIcon1"; this.notifyIcon1.Visible = true; this.notifyIcon1.Click += new System.EventHandler(this.notifyIcon1_Click); // // contextMenu1 // this.contextMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] { this.menuItem2, this.menuItem1}); // // menuItem1 // this.menuItem1.Index = 1; this.menuItem1.Text = "Exit"; this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click); // // menuItem2 // this.menuItem2.Index = 0; this.menuItem2.Text = "Click"; this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click); // // WinForm // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(264, 237); this.Name = "WinForm"; this.Text = "WinForm"; this.Closing += new System.ComponentModel.CancelEventHandler(this.WinForm_Closing); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new WinForm()); } private void menuItem1_Click(object sender, System.EventArgs e) { closeFromMenu = true; this.Close(); } private void WinForm_Closing(object sender, System.ComponentModel.CancelEventArgs e) { if (!closeFromMenu) { this.Visible = false; e.Cancel = true; } } private void notifyIcon1_Click(object sender, System.EventArgs e) { if (!this.Visible) { this.Visible = true; } else { this.Activate(); } } private void menuItem2_Click(object sender, System.EventArgs e) { // any code } } } Tag: lbhappy@263.net Tag: 61911
  - 4
    - html control I asked this a few days ago but it appears I didnt word it correctly. Is there any way to place a html control onto a windows form in .net such that the javascript on the html displayed within the html can access properties and methods of the application via the external object in JS? Tag: lbhappy@263.net Tag: 61902
  - 5
    - Textbox-level validation Folks, I have a C# WinForms app, and I am doing some validation of text boxes and their contents. So far, I've used the TextBox1_Leave event - if the focus goes away from the textbox, I check for certain conditions (not empty, valid entry etc.). This works okay so far - but in some cases, I'd like to skip that validation, e.g. when the user clicks on the "Cancel" button. But how can I "foresee" that the user has clicked the Cancel button, inside my TextBox1_Leave event?? In Delphi, we used to be able to inspect a property "ActiveControl" which was set to the button that had been clicked - based on that info, I was able to determine whether or not I wanted to apply my validation. I don't seem to find anything similar in C# / .NET - I do have an "ActiveControl" property, but that is still set to my text box, as long as I'm still on it..... Any way to achieve what I'm trying to do without major kludges?? Marc ================================================================ Marc Scheuner May The Source Be With You! Bern, Switzerland m.scheuner(at)inova.ch Tag: lbhappy@263.net Tag: 61901
  - 6
    - abstract form why i cannot code a form as abstract in order for other form to inherite it in C#? thz Tag: lbhappy@263.net Tag: 61892
  - 7
    - Scope of form variables... This may sound like a dumb question, but I am hoping someone might comment on it.... Consider the following method (assuming that Form1 is a class derived from System.Windows.Forms.Form) : private void MyMethod() { int i = 1; Form1 myForm = new Form1(); myForm.Show(); } Both of the variables, i and myForm, are local variables that should go out of scope when the method is finished executing. But the myForm variable continues to live on. Is this correct? Why is the scope of form variables different than the scope of other types? Tag: lbhappy@263.net Tag: 61889
  - 8
    - free control alterative to treeview does anybody of the existance of a free control that is a good alternative to the treeview i basically want some flexibility in the UI and ability to do multiselect etc etc. in delphi some guy had made a free virtual tree view that just rocked and i'm looking to see if some people have stepped up to the mark in C# Karl Tag: lbhappy@263.net Tag: 61888
  - 9
    - image of button I find that when a button is disabled, the image on the button will not display and turn into a mess of grey color, is there anything we can do so that the image can be visible or fade out or change to another image in order to indicate that the button is disabled rather than turn into a mess of grey. Thz Tag: lbhappy@263.net Tag: 61887
  - 10
    - Main Form Unresponsive I'm building a custom install program that allows the user to select which assemblies get installed. In creating the prototype I am encountering a situation where the main form will not accept user input after the installation is complete. In my form, pressing the 'Install' button runs the following method: public override bool Install() { IDictionary savedState = new Hashtable(); System.Configuration.Install.AssemblyInstaller ai = new System.Configuration.Install.AssemblyInstaller(); try { ai.Path = "testassembly.dll"; ai.UseNewContext = true; ai.Install(savedState); ai.Commit(savedState); ai.Dispose(); return true; } catch (Exception e) { return false; } } My trivial installer class is the only class in the "testassembly.dll" named above: [RunInstaller(true)] public class Installer1 : System.Configuration.Install.Installer { public Installer1() { } public override void Install(IDictionary stateSaver) { base.Install (stateSaver); MessageBox.Show("Installing", "TestAssembly"); } public override void Uninstall(IDictionary savedState) { base.Uninstall (savedState); MessageBox.Show("Installing", "TestAssembly"); } } After the install MessageBox is dismissed, the main form gets updated (progress bar goes away and a 'Done' button is made visible) correctly, but when I try to either click the 'Done' button to exit the app, or close the form, nothing happens. If I remove the MessageBox from the installer class, then everything works correctly and I can exit the app, so I assume that there is some sort of forms or event loop issue going on, but I have not been able to figure it out. Anyone have any ideas? Matt Tag: lbhappy@263.net Tag: 61883
  - 11
    - Share a connection Hi How do I share a connection between two forms??? Regards Tag: lbhappy@263.net Tag: 61879
  - 12
    - Main Form's Display chops Right Side & Bottom Hello, It seems that on a certain machine (i.e. Dell Dimension 4500S) when the main form is displayed (it initially comes up maximized, and AutoScale is True per the default - not that I truly grasp its significance) parts of the right and bottom portions of the form are not being displayed at all in the window. They seem to have been truncated from the display. I have a textbox that is located (and anchored) on the far right-hand side of the form and when it comes up more than half of the text is just chopped off (a good 2 logical inches or so). The bottom of the form has two rows of icons (24x24) that don't show up at all (these icons are also anchored to the bottom of the form). You can't ever get the form to show any of the "lost" area either (ie. by resizing, minimizing, maximizing, etc.). Has anyone seen this behavior at all or has any ideas as to what is causing this behavior? Is there some known issues with cetain computer's video drivers (this Dell Dimensions uses an Intel video driver) and .NET. After looking around on the net I haven't seen this addressed. On this particular machine "normal" apps seem to work fine and this is the first .NET form application it's ever seen. Thanks for any help/insight, JB Tag: lbhappy@263.net Tag: 61878
  - 13
    - Maximum height of windows form Hi, I am trying to set the height of a form in the VS .net IDE, and somehow seem unable to set the height beyond 780. I have set the autoscale and autoscroll properties to true, and the Miniumn size and maximum size are set to 0,0 each. I was under the impression that with these settings I could make the form as big as I wanted, and could get the scrollbars automatically when needed. However this doesnt seem to be happening. The height gets reset to 780 if i type in anything bigger than that. Am I missing something here ? Does anyone have an idea why I see such behavior ? Thanks in advance for any help, Aniket Sule Tag: lbhappy@263.net Tag: 61876
  - 14
    - Is there any way to get an MDI child window to flash, like with FlashWindowEx()? With FlashWindowEx(), I can make dialogs flash (like yahoo chat and stuff like that). Is there any way to get an MDI child window to flash in the same way? FlashWindowEx() doesn't work on child windows... Tag: lbhappy@263.net Tag: 61873
  - 15
    - Selecting Listview Item by Text I have a listview with items Apple, Pear, Banana. How can I programmatically select Pear if I don't know the index? Thanks, Todd Tag: lbhappy@263.net Tag: 61868
  - 16
    - OnPaint when using Offscreen bitmap I am using an offscreen bitmap and I have scrolling. For now I DrawImage the entire offscreen bitmap -- but that is slow. Could anyone please tell me how to only DrawImage the portion I need so it will go faster. Thank you! For now I do: protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); e.Graphics.TranslateTransform( AutoScrollPosition.X, AutoScrollPosition.Y); e.Graphics.DrawImage(offScreenBmp, 0, 0); System.Drawing.Size s = new System.Drawing.Size(); s.Width = 0; s.Height = 2100; AutoScrollMinSize = s; } Tag: lbhappy@263.net Tag: 61861
  - 17
    - Problems with MessageBox.Show I'm experiencing a problem where I have a non-modal toolwindow that contains a control derived from System.Windows.Forms.ComboBox displayed in an MDI application. Whenever a .NET message box is displayed in the application the derived combo boxes on the toolwindow appear to lose their base control, i.e. base.WndProc(ref m) in the derived control's WndProc results in a NullReferenceException. Admittedly this could be a problem with the derived controls, however after looking at how System.Windows.Forms.MessageBox works it seems like there are some "oddities". Also, if I call the Win32 MessageBox function directly via p/invoke, specifying the correct owner window, then everything works fine. Here is the section of System.Windows.Forms.MessageBox (ShowCore) that I've been looking at: if ((owner != null) && ((options & 2228224) != 0)) throw new ArgumentException(SR.GetString("CantShowMBServiceWithOwner"), "style"); IntSecurity.SafeSubWindows.Demand(); num1 = (((buttons | icon) | defaultButton) | options); ptr1 = IntPtr.Zero; if ((options & 2228224) == 0) { if (owner == null) ptr1 = UnsafeNativeMethods.GetActiveWindow(); else ptr1 = owner.Handle; } Application.BeginModalMessageLoop(); result1 = MessageBox.Win32ToDialogResult(SafeNativeMethods.MessageBox(new HandleRef(owner, ptr1), text, caption, num1)); Application.EndModalMessageLoop(); return result1; The value of 2228224 corresponds to MessageBoxOptions.DefaultDesktopOnly | MessageBoxOptions.ServiceNotification. The interesting thing here is that the owner parameter is always ignored since owner must be null when options contains the above flags. If owner is not null, the handle is never retrieved because options cannot also contain the above flags and therefore ptr1 remains as IntPtr.Zero. The other interesting thing is the BeginModalMessageLoop/EndModalMessageLoop block. It appears as though this disables all windows in the current thread, although I haven't looked at this too deeply, and this further implies that the owner parameter plays no part in establishing modality. Does anyone have any thoughts on this, particularly with reference to the fact that the BeginModalMessageLoop/EndModalMessageLoop block appears to be causing severe problems for my non-modal windows? A single call to the Win32 MessageBox function with a correctly specified owner window does not exhibit the same problems. TIA. -- Kevin Westhead Tag: lbhappy@263.net Tag: 61859
  - 18
    - PropertyGrid customization Hi, I'm in the process of customizing the PropertyGrid for an application. I've written several TypeConverters and a few editors to display and process data within the grid. What I haven't been able to do yet is have the editor control receive the mouse input from another window. For example, I have a CAD app and I want modify a line entity. I select the entity and its properties are displayed in the PropertyGrid. I select the beginning coordinate field in the PropertyGridwant to modify the coordinate of the beginning point by selecting the location in the graphics window. Is this possible, or do I just need to create my own custom version of the PropertyGrid?? What I would ideally like to do is embed an existing custom control inside the PropertyGrid. TIA, Peter Tag: lbhappy@263.net Tag: 61851
  - 19
    - Preventing "ding!" on Esc or Enter in a textbox Anybody know how to prevent the ding sound from happening when the escape or enter key is entered into a textbox? I need to catch the enter and escape keys for processing. I've the following event handler for on the Keydown event of the text box, but I'm still getting the ding sound. private void EditBoxKeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { if ( e.KeyCode == Keys.Enter ) { /* do some processing */ e.Handled = true; } if ( e.KeyCode == Keys.Escape ) { /* do some processing */ e.Handled = true; } } Tag: lbhappy@263.net Tag: 61848
  - 20
    - Form Start Position question When I set the StartPosition on my main form to CenterScreen, the form never starts at center screen, but offset toward the lower right corner. On my modal login form, however, the property seems to work just fine. Am I overlooking something?? Thanks! Tag: lbhappy@263.net Tag: 61846
  - 21
    - Form Scrolling I have scrolling in my app. When I click the arrows of the scroll bar or click inside the scroll bar the app scrolls -- but when I drag the scroll box (that part in the middle) the app does not scroll until after I release the mouse button. I'd like it to scroll as I drag that scroll box. I figure I could just call this.refresh but I do not see any events for the Form that fire while dragging that box? Thank you. Tag: lbhappy@263.net Tag: 61843
  - 22
    - Call another form Hi I created two forms in the same proyect and I want to call one form from another one but I couldn't find the Show method. I'm working with C#. In Visual Basic 6 you can tell the proyect which form use first. Regards Tag: lbhappy@263.net Tag: 61838
  - 23
    - Custom Authentication I have a project where I have to build an internet cafe type program. I am having a problem figuring out how to authenticate at user stations . What I want to do is client machine to be locked and needs a temporary password to get in. I am not sure how to lock the workstation. I am not just looking for a solution, but suggestions. I have looked in google but I am not sure what I am looking for. Any ideas? John Tag: lbhappy@263.net Tag: 61837
  - 24
    - NumericUpDown Control bug Hi, I am using a control derived from NumericUpDown control and when I click on the arrow and keep clicking on it for long it crashes giving following error : System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.UpDownButtons.TimerHandler (Object source, EventArgs args) at System.Windows.Forms.Timer.OnTick(EventArgs e) at System.Windows.Forms.Timer.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr idEvent, IntPtr dwTime) Can anyone tell me how to fix this? I want to just handle this exception so that it stops cpmplainng but don't know what event to handle. Thanks in advance for the help. Gudia Tag: lbhappy@263.net Tag: 61836
  - 25
    - Custom painting in TextBox Hello I have a new class which inherits from TextBox and implements a numeric textbox which have to allow the user to input signed numbers. The control of key input is OK. The problem is how to implement the display of the sign character. I am planning to enabled this feature by allowing the pressing of plus and minus keys (+ and -). When the user hits the minus key, the negative sign appears at the left side of the number; when he hits the plus key, no sign is shown in the textbox. This means that changing the left margin of the textbox is not enough to make this feature work because the textbox's default alignment is at the right side, and, in addition, the textbox must allows the programmer to change the text's alignment. I do not want to include the negative sign character in the text because of the lot of code I will have to write in order to control user key hitting. I am thinking about just painting the negative sign character at the left side of the text, without including it in the text, by handling some paint event. Does somebody knows some guidelines on how can I do this? Celio C Jr Tag: lbhappy@263.net Tag: 61835

I need to embed my windows form application into Word
documents.I know Word can be embed with Viso or Excel. I
think there must be someway to work with my applications.
How can I get it?

Any comments appreciated!

Robin.Liu

Top

Re: lbhappy@263.net by Ken

Ken
Wed Nov 26 06:16:36 CST 2003

Hi,

Do you mean an Add-In for word? There is a project template in other
projects/extensibility.

Ken
---------------
"Robin.Liu" <anonymous@discussions.microsoft.com> wrote in message
news:0f0101c3b404$19df4f80$a101280a@phx.gbl...
> I need to embed my windows form application into Word
> documents.I know Word can be embed with Viso or Excel. I
> think there must be someway to work with my applications.
> How can I get it?
>
> Any comments appreciated!
>
> Robin.Liu
>

Top