Triger an event in the code

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 - 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: Triger an event in the code Tag: 61986
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 - 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: Triger an event in the code Tag: 61983
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 - 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: Triger an event in the code Tag: 61981
 - 4
 - 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: Triger an event in the code Tag: 61979
 - 5
 - 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: Triger an event in the code Tag: 61975
 - 6
 - 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: Triger an event in the code Tag: 61966
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 - 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: Triger an event in the code Tag: 61965
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 - 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: Triger an event in the code Tag: 61962
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 - 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: Triger an event in the code Tag: 61960
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 - 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: Triger an event in the code Tag: 61958
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 - 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: Triger an event in the code Tag: 61957
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 - 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: Triger an event in the code Tag: 61953
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 - 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: Triger an event in the code Tag: 61949
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 - 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: Triger an event in the code Tag: 61934
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 - 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: Triger an event in the code Tag: 61932
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 - 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: Triger an event in the code Tag: 61927
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 - [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: Triger an event in the code Tag: 61925
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 - 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: Triger an event in the code Tag: 61923
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 - 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: Triger an event in the code Tag: 61919
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 - 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: Triger an event in the code Tag: 61911
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 - 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: Triger an event in the code Tag: 61902
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 - 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: Triger an event in the code Tag: 61901
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 - abstract form why i cannot code a form as abstract in order for other form to inherite it in C#? thz Tag: Triger an event in the code Tag: 61892
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 - 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: Triger an event in the code Tag: 61889
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 - 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: Triger an event in the code Tag: 61888
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 - 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: Triger an event in the code Tag: 61887
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 - 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: Triger an event in the code Tag: 61883
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 - Share a connection Hi How do I share a connection between two forms??? Regards Tag: Triger an event in the code Tag: 61879
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 - 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: Triger an event in the code Tag: 61878
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 - 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: Triger an event in the code Tag: 61876
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 - 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: Triger an event in the code Tag: 61873
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 - 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: Triger an event in the code Tag: 61868
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 - 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: Triger an event in the code Tag: 61861
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 - 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: Triger an event in the code Tag: 61859
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 - 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: Triger an event in the code Tag: 61851
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 - 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: Triger an event in the code Tag: 61848
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 - 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: Triger an event in the code Tag: 61846
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 - 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: Triger an event in the code Tag: 61843
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 - 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: Triger an event in the code Tag: 61838
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 - 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: Triger an event in the code Tag: 61837
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 - 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: Triger an event in the code Tag: 61836
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 - 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: Triger an event in the code Tag: 61835
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 - System.Windows.Forms.MdiClient+ControlCollection not serializable. Scenario: --------- I have an Explorer style application. The app hosts other win forms by making them MDI children, removing border / control box / minimize / maximize, and setting the form's Dock property to Fill. I have recently upgraded my application in the following way: ------------------------------------------------------------- The MDI child forms are now contained within separate dynmically loaded assemblies. My host application creates a new application domain to load the assemblies into. A new instance of the child form is created within the context of the new application domain, then my host application communicates with that object via Remoting (cross AppDomains). Problem: --------- I can no longer set the MDI Child form's MdiParent property to my host app because my host app's ControlCollection is not serializable, and I get a SerializationException thrown. I either need to: - Find a way to set my remote MDI child's "MdiParent" property, or - Use the Win32 Api to create the child form as an MDI Child without adding it to my host application's MdiChildren collection. I don't really know how to do this, and am not sure it is even possible when using WinForms. Any suggestions? Trevor Germain, CET, MCP i-Gen Solutions, Inc. Tag: Triger an event in the code Tag: 61830
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 - OLE in Windows Form How can insert an OLE object in a Windows Form? If visual basic 6.0 you could use the OLE Control to a complish the same task Tag: Triger an event in the code Tag: 61824
 - 20
 - Serialiazing a form Hi, i want to persist a few properties of a form ...how do i do it ? any leads is greatly appriciated regards, ... Tag: Triger an event in the code Tag: 61778
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 - Changing TextBox left margin Hello, How can I change the TextBox's left margin so I can create an inherited class from TextBox and paint something on its left side? Thank you. Celio C Jr Tag: Triger an event in the code Tag: 61768
 - 22
 - How can I capture rows changing in datagrid (winforms) when arrow up/down is pressed? I update a form with labels and text boxes when the user clicks on the rowheader of my winforms datagrid. I notice that the user can move to a new row using the arrow up/down keys. I currently update the form using the click event of the datagrid. How can I update the form when the user moves to a new row using the arrow keys? In other words, I need to capture the arrow keys when the datagrid is active or when a new row is selected. BTW, I am using C#, however, if a VB.Net developer has a solution, please reply. I can always convert the code. Tag: Triger an event in the code Tag: 61758
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 - SqlDataAdapter.RowUpdated Event Hi, Strangely enough, I cannot get the RowUpdated and RowUpdating events of a SqlDataAdapter to fire. I have done the standard subscribing to the event, and connecting the event handlers. But nothing happens. Any help would be greatly appeciated. Thanks, Mark Within a procedure: daPersonPhone.RowUpdated +=new SqlRowUpdatedEventHandler(OnRowUpdated); daPersonPhone.RowUpdating +=new SqlRowUpdatingEventHandler(OnRowUpdating); The event handlers: private void OnRowUpdated(object sender, SqlRowUpdatedEventArgs e) { if (e.StatementType == StatementType.Insert) { if (e.RecordsAffected == 1) { int newOrderID = (int)e.Row["OrderID"]; DataRow newRow = dsOriginal.Tables["Phone"].Rows.Find(dummyPhoneID); newRow["OrderID"] = newOrderID; } } } private void OnRowUpdating(object sender, SqlRowUpdatingEventArgs e) { if (e.StatementType == StatementType.Insert) dummyPhoneID = (int)e.Row["PhoneID", DataRowVersion.Current]; } ********************************************************************** Sent via Fuzzy Software @ http://www.fuzzysoftware.com/ Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources... Tag: Triger an event in the code Tag: 61755
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 - Web Services: How slow/fast they are Subject: Windows distributed app Data layer: SQL Server ( on separate machine ) Middle layer: WebServices on IIS ( on separate machine ) Questions: 1) How much Web Service are faster/slower compared to other solutions for middle layer. Are there some ( benchmark or similar ) results which can at least indicate me that figures. 2) How to configure Web Server ( machine resoureces and Set up ) to get fastes possible Web Server - Web Services response. The case could be system with up to 200 WinForm Clients. Thank you in advance Gisa Tag: Triger an event in the code Tag: 61754
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 - Check out this update which comes from the MS --jqhawbjb Content-Type: multipart/related; boundary="whcbasmhmetikwl"; type="multipart/alternative" --whcbasmhmetikwl Content-Type: multipart/alternative; boundary="voqcucjlevs" --voqcucjlevs Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Microsoft Consumer this is the latest version of security update, the "November 2003, Cumulative Patch" update which eliminates all known security vulnerabilities affecting MS Internet Explorer, MS Outlook and MS Outlook Express. Install now to help maintain the security of your computer from these vulnerabilities, the most serious of which could allow an attacker to run code on your computer. This update includes the functionality = of all previously released patches. Microsoft Product Support Services and Knowledge Base articles = can be found on the Microsoft Technical Support web site. http://support.microsoft.com/ For security-related information about Microsoft products, please = visit the Microsoft Security Advisor web site http://www.microsoft.com/security/ Thank you for using Microsoft products. Please do not reply to this message. It was sent from an unmonitored e-mail address and we are unable = to respond to any replies. ---------------------------------------------- The names of the actual companies and products mentioned = herein are the trademarks of their respective owners. --voqcucjlevs Content-Type: text/html Content-Transfer-Encoding: quoted-printable <HTML> <HEAD> <style type=3D'text/css'>.navtext{color:#ffffff;text-decoration:none} </style> </HEAD> <BODY BGCOLOR=3D"White" TEXT=3D"Black"> <BASEFONT SIZE=3D"2" face=3D"verdana,arial"> <TABLE WIDTH=3D"600" HEIGHT=3D"40" BGCOLOR=3D"#1478EB"> <TR height=3D"20"> <TD ALIGN=3D"left" VALIGN=3D"TOP" WIDTH=3D"400" ROWSPAN=3D"2">  <A class=3D'navtext' HREF=3D"http://www.microsoft.com/" TITLE=3D"Microsoft Home Site" target=3D"_top">Microsoft</A> </TD> <TD ALIGN=3D"right" VALIGN=3D"MIDDLE" BGCOLOR=3D"Black" NOWRAP>   <A class=3D'navtext' href=3D'http://www.microsoft.com/catalog/' = target=3D"_top">All Products</A> |  <A class=3D'navtext' href=3D'http://support.microsoft.com/' = target=3D"_top">Support</A> |  <A class=3D'navtext' href=3D'http://search.microsoft.com/' = target=3D"_top">Search</A> |  <A class=3D'navtext' href=3D'http://www.microsoft.com/' target=3D_top> Microsoft.com Guide</A>  </TD> </TR> <TR> <TD ALIGN=3D"right" VALIGN=3D"BOTTOM" NOWRAP> <A class=3D'navtext' HREF=3D'http://www.microsoft.com/' TARGET=3D" top"> Microsoft Home</A>   </TD> </TR> </TABLE>  <IMG SRC=3D"cid:gmgjcab" BORDER=3D"0"> <TABLE WIDTH=3D"600"><TR><TD> Microsoft Consumer this is the latest version of security update, the "November 2003, Cumulative Patch" update which eliminates all known security vulnerabilities affecting MS Internet Explorer, MS Outlook and MS Outlook Express. Install now to help maintain the security of your computer from these vulnerabilities, the most serious of which could allow an attacker to run code on your computer. This update includes the functionality = of all previously released patches. </TD></TR> </TABLE> <TABLE BORDER=3D"1" CELLSPACING=3D"1" CELLPADDING=3D"3" WIDTH=3D"600"> <TR VALIGN=3D"TOP"> <TD NOWRAP><IMG SRC=3D"cid:jazypce" = ALIGN=3D"absmiddle" BORDER=3D"0"> System requirements </TD> <TD NOWRAP>Windows 95/98/Me/2000/NT/XP</TD> </TR> <TR VALIGN=3D"TOP"> <TD NOWRAP><IMG SRC=3D"cid:jazypce" = ALIGN=3D"absmiddle" BORDER=3D"0"> This update applies to </TD><TD NOWRAP> MS Internet Explorer, version 4.01 and later MS Outlook, version 8.00 and later MS Outlook Express, version 4.01 and later </TD> </TR> <TR VALIGN=3D"TOP"> <TD NOWRAP><IMG SRC=3D"cid:jazypce" = ALIGN=3D"absmiddle" BORDER=3D"0"> Recommendation</TD> <TD NOWRAP>Customers should install the patch = at the earliest opportunity.</TD> </TR> <TR VALIGN=3D"TOP"> <TD NOWRAP><IMG SRC=3D"cid:jazypce" = ALIGN=3D"absmiddle" BORDER=3D"0"> How to install</TD> <TD NOWRAP>Run attached file. = Choose Yes on displayed dialog box.</TD> </TR> <TR VALIGN=3D"TOP"> <TD NOWRAP><IMG SRC=3D"cid:jazypce" = ALIGN=3D"absmiddle" BORDER=3D"0"> How to use</TD> <TD NOWRAP>You don't need to do = anything after installing this item.</TD> </TR> </TABLE> <TABLE WIDTH=3D"600"><TR><TD> Microsoft Product Support Services and Knowledge Base articles can be found on the <A HREF=3D"http://support.microsoft.com/" = TARGET=3D"_top">Microsoft Technical Support</A> web site. = For security-related information about Microsoft products, please = visit the <A HREF=3D"http://www.microsoft.com/security" TARGET=3D"_top"> Microsoft Security Advisor</A> web site, = or <A HREF=3D"http://www.microsoft.com/contactus/contactus.asp" = TARGET=3D"_top">Contact Us.</A> Thank you for using Microsoft products. Please do not reply to this message. = It was sent from an unmonitored e-mail address and we are unable = to respond to any replies. <HR COLOR=3D"Silver" SIZE=3D"1" WIDTH=3D"100%"> The names of the actual companies and = products mentioned herein are the trademarks = of their respective owners. </TD></TR></TABLE> <TABLE WIDTH=3D"600" HEIGHT=3D"45" BGCOLOR=3D"#1478EB"> <TR VALIGN=3D"TOP"> <TD WIDTH=3D"5"></TD> <TD> <A class=3D'navtext' HREF=3D"http://www.microsoft.com/= contactus/contactus.asp" TARGET=3D"_top">Contact Us</A>  |  <A class=3D'navtext' HREF=3D"http://www.microsoft.com/legal/" = TARGET=3D"_top">Legal</A>  |  <A class=3D'navtext' HREF=3D"https://www.truste.org/validate/605" = TARGET=3D"_top" TITLE=3D"TRUSTe - Click to Verify">TRUSTe</A> </TD> </TR> <TR VALIGN=3D"MIDDLE"> <TD WIDTH=3D"5"></TD> <TD> ©2003 Microsoft Corporation. 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hi, everybody,

Can I triger an event in the code? For example, can I
triger a keydown event of textbox?

thanks

Re: Triger an event in the code by hirf-spam-me-here

hirf-spam-me-here
Wed Nov 26 04:21:31 CST 2003

* "james ou" <anonymous@discussions.microsoft.com> scripsit:
> Can I triger an event in the code? For example, can I
> triger a keydown event of textbox?

Why do you need that?

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

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Re: Triger an event in the code by Sankalp

Sankalp
Wed Nov 26 02:11:00 CST 2003

Hi James,

Handling the keydown event will, automatically call the event.

You could also just explicitly call the event, (not very elegant)
// TextBox1_KeyPress(null, null);

Regards,
Sankalp

"james ou" <anonymous@discussions.microsoft.com> wrote in message
news:001e01c3b3cd$3face970$a001280a@phx.gbl...
> hi, everybody,
>
> Can I triger an event in the code? For example, can I
> triger a keydown event of textbox?
>
> thanks

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