Windows app access db internet

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  - 1
    - WinForm Behavior Hi. I´m developing an MDI aplication and I have a base form from where all child windows inherits. The issue is that all the controls I place in the inherited child form at design time use say Arial 12 font and the textboxes are 20pixels hi, however at runtime everything ends up twice as large than designed, like Arial 16 and textboxes 40pixels hi. So far this is cool because I infact need to adjust the size of the controls all over the aplication according to the resolution it is being running on. However I don't know what feature is that and need to know what it is in order to control it! Any ideas? is it the base form used by the child windows or is something on the MDI container that somehow "inherits" some property to the controls the contain? Thanks in advance, Nando Tag: Windows app access db internet Tag: 86095
  - 2
    - Multirow listview (sort of) I have a problem with my windows form. I want to display items that doesn't fit on one row in a listview. I would like to find a control which enables me to add all my columns but one to the first row and the last column on the second row. If it was a html-table an item would look like this <tr><td>Column 1</td> <td>Column 2</td> <td>Column 3</td> </tr> <tr> <td colspan="3">Column 4. Big.</td> </tr> It would be nice if the control would be similar to a listview in Details-view (able to change the width and sort on the columns in the first row). /nisse Tag: Windows app access db internet Tag: 86093
  - 3
    - What happens when WindowState =Minimized ? Hi, i found unusal things happening when Program main window is minimized. I'm writing large programm on C# and having problem whith memory size allocated bu program. Every time i use some dialog's ShowDialog() the memory size of process increases. But ones i minimize main window memory size decreases significantly (for example : program that was just loaded whith 2 nonmodal dialogs takes 35 MB, after Minimize and Restore it becomes 5 MB after restoring comes 8MB). My questions are : Which actions are take when window is minimized ? How can I reproduse these actions in order to decrease used memory size (Without Minimize & Restore)? I tried with GC.Collect() it doesnt help. Please help.. I need it very urgent. Giga Tag: Windows app access db internet Tag: 86081
  - 4
    - An Application's forms Is it possible to get a reference to a collection of all an Application's loaded forms? I want to do something like... For each Form in Application.Forms Form.ResetLocation Next Form Tag: Windows app access db internet Tag: 86080
  - 5
    - How to import a text file from a WinForms to a db How to import a text file from a WinForms to db some one cam help me? marco Tag: Windows app access db internet Tag: 86078
  - 6
    - Skip LinkLabel in TAB order I have designed a custom control derived from UserControl which contains a LinkLabel and a TextBox. If the user uses the TAB key to move the focus to my custom control I want the TextBox to get the focus and not the LinkLabel. Therefore I set the TabStop property of the LinkLabel control to False (in the constructor of my custom control, after InitializeComponent()). However, the TabStop property of the LinkLabel is ignored and it still gets the focus. As a workaround I tried to override OnEnter of my custom control: Protected Overrides Sub OnEnter(ByVal e As System.EventArgs) myTextBox.Focus() End Sub Unfortunately this doesn't work either. The TextBox gets the focus but immediately afterwards the focus moves to the LinkLabel. Overriding OnGotfocus results in the same behaviour. How could I prevent the LinkLabel to get the focus if the user uses the TAB key to move the focus to my custom control? Thanks for any ideas, Guido Tag: Windows app access db internet Tag: 86077
  - 7
    - How to achieve the following functionality with Windows Forms ? I have a useful framework, written in a different language (PowerBuilder), which I'd like to replicate in .Net and Forms, but I'm unsure of how to approach it, as the Event model is being used different between the development environments. Currently we have data entry screens, whose columns have been "wired" into a class that performs checks on the entered data. As the user "leaves" a column, the specific check / business rule is carried out. A lot of the checks are common across all the screens and linking the column to the specific method to be called is as easy a giving the column the appropriate Name. How can I create my own framework which would allow an easy method of connecting / wiring the columns and the method checks together. I was planning on using DataGrids, but can change that if I need to. Tag: Windows app access db internet Tag: 86075
  - 8
    - Inherited controls in worng location Please can you explain the following... I create a new form and add to it the following objects: a MainMenu, A MenuItem, a PictureBox and a Button. I change the button properties so that it is anchored BottomRight. I then create another form which inherits from the first. And I add to it another Button object. I then build my project. After the project has been built the first Button object's location moves up by one pixel! With some experimentation I've found this happens with other objects too but equally, in some circumstanmces, if doesn't happen at all. Can you explain why and whether there is a solution? Tag: Windows app access db internet Tag: 86074
  - 9
    - Urgent Help : Re-select Combobox Value Dear all, I'm doing a winform project which uses "ComboBox" in one of the form. The winform contains "ComboBox" with the values as below: - this.ComboBox1.Items.AddRange(new object[] {"Apple", "Orange", "StrawBerry"}); Users will select on of the item from the combobox and stored into database. Users have the rights to update this record. The question is, how do I select the combobox value base on the value from database? I have used "SelectedText", "SelectedValue", but it doesn't seem to be working. Please Help. Thanks in advance. Cheers, Mae Tag: Windows app access db internet Tag: 86068
  - 10
    - Form question (Re-usuable code) Is there any way of making the following code into a function so that I don't have to re-use the same code for all my buttons? I've tried to do this with the code at the bottom of my post but I get a build error saying 'Type FormToShow is not defined'. Cheers, Paul Private WithEvents Example1Form As frmDragDropFromExplorer Private WithEvents Example2Form As frmDragDrop Public Shared Sub Main() Application.EnableVisualStyles() Application.DoEvents() Application.Run(New frmMain) End Sub Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click Try Example1Form.Show() Catch Example1Form = New frmDragDropFromExplorer Example1Form.Show() Finally Example1Form.Focus() End Try End Sub ---- Tried this but got the error 'FormToShow is not defined' --- Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click ShowForm(Example1Form) End Sub Private Function ShowForm(ByVal FormToShow As Form) Try FormToShow.Show() Catch FormToShow = New FormToShow FormToShow.Show() Finally FormToShow.Focus() End Try End Function Tag: Windows app access db internet Tag: 86062
  - 11
    - Form question (Re-usuable code) Is there any way of making the following code into a function so that I don't have to re-use the same code for all my buttons? I've tried to do this with the code at the bottom of my post but I get a build error saying 'Type FormToShow is not defined'. Cheers, Paul Private WithEvents Example1Form As frmDragDropFromExplorer Private WithEvents Example2Form As frmDragDrop Public Shared Sub Main() Application.EnableVisualStyles() Application.DoEvents() Application.Run(New frmMain) End Sub Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click Try Example1Form.Show() Catch Example1Form = New frmDragDropFromExplorer Example1Form.Show() Finally Example1Form.Focus() End Try End Sub ---- Tried this but got the error 'FormToShow is not defined' --- Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click ShowForm(Example1Form) End Sub Private Function ShowForm(ByVal FormToShow As Form) Try FormToShow.Show() Catch FormToShow = New FormToShow FormToShow.Show() Finally FormToShow.Focus() End Try End Function Tag: Windows app access db internet Tag: 86061
  - 12
    - Windows Forms .NET 2.0 Advice Hello, I could use some advice. I have an application to build for a client the must be developed as a windows form application. This is an application that was written years ago using VB6 and an access database. I am an experienced .Net developer, version 1.1 but have built web applications, not windows forms. Should I consider .NET 2.0 for this application? I do not have windows form experience in .net so there will be a learning curve either way. Are there enough new features in .net 2.0 windows forms to consider this? Also, can you point me to any good docs on the subject. Thanks scott Tag: Windows app access db internet Tag: 86060
  - 13
    - Windows Form and Windows Form User Control - Where Is The Method That Would corresspond To A Web Form Pre_Render Method Hello MyMainWebPage.aspx contains MyUserControl.ascx MyUserControl.ascx has a DataTable Property MyDataTable MyUserControl.ascx has a DataGrid which whose datasource is MyDataTable (or technically it's private accessor but that I don't think is an issue here) MyMainWebPage creates a DataTable dt . I then do a "MyUserControl.MyDataTable = dt" In order for the data to appear in the user control grid I must do the "MyUserControl.MyDataTable = dt" in the Pre_Render of MyWebPage I want to do this type of thing with a window form and windows user control. Where in the windows form user control would I bind the datatable? If I do it in the user controls page_load it does show the data in the datagrid? Thank you, Richard Tag: Windows app access db internet Tag: 86051
  - 14
    - datagrid colum's nulltext property displayed in column when field not null I have a record displayed in datagrid and 2 columns says the text i've designated as the nulltext for those columns, but when i look at the data in the db, those values are listed there. is there some issue/bug that can be causing this? thanks Tag: Windows app access db internet Tag: 86047
  - 15
    - Re: Using a string array as a datasource in a listbox "claire clinton" claire.clinton@cae.com wrote: > How do I add a string array as a llstbox datasource in the=20 > designer? I have a static class that defines an array and=20 > don't want to rebuild it in the designer. But I have to=20 > manually add the setting of the listbox datasource in code=20 > since the designer seems to only allow adding datasets as=20 > a datasource. This would be ok except when I go back to=20 > the designer, it converts the datasource assignment of the=20 > class array to an equivalent hard coded new string array=20 > and then adds an Item.AddRange assignment for the same=20 > string which then aborts when I run with the error=20 > message "Can't modify the Items collection when the=20 > DataSource property is set". I fix this by deleting the=20 > designer added code and putting my Datasource assignment=20 > back in. This is extremely annoying and will be=20 > unnacceptable for my final product. How can I prevent this=20 > from occuring. I am having a similar problem. Can anyone suggest how to solve it? Thanks, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Windows app access db internet Tag: 86045
  - 16
    - How can I turn off the ControlBox but still have Close in the upper right of a form? I know I've done this in the past but can't remember how I did it. How can I turn off the ControlBox but still have the Close X in the upper right of a Form? It's some combo of FixedDialog and ControlBox = false thanks mike Tag: Windows app access db internet Tag: 86044
  - 17
    - Problem binding a listbox to an array Hello people, I am having problems binding a listbox to an array. Using Visual Studio 2003 with framework 1.1 That's the array: internal class Data { private Data() {} // static class public static readonly string[] states =3D { "Alabama", = "Alaska", "Arizona", /* ...*/ "Wisconsin", "Wyoming"}; } I also have a listbox on a form. The auto-generated code is: // listStates this.listStates.Name =3D "listStates"; this.listStates.TabIndex =3D 0; this.listStates.Location =3D new System.Drawing.Point(8, 16); this.listStates.Size =3D new System.Drawing.Size(100, 82); this.listStates.SelectionMode =3D = System.Windows.Forms.SelectionMode.MultiSimple; Question number 1: In the designer, the DataSource property of the listStates ListBox is = not editable. I would like to bind it to the array at design time but I cannot. I that supposed to be like that or am I missing something? Question number 2: When I added the following statement listStates.DataSource =3D Data.states; it appeared to work but I started having weird behaviour regarding the = selection. In particular, after selecting several items and unselecting all of = them, the first item would become selected. What am I doing wrong? Thank you, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Windows app access db internet Tag: 86043
  - 18
    - Change mouse cursor when points to specific cell I am creating a linklabel look-a-link in a datagrid with the following code by overriding the paint sub: If column = 0 Or column = 3 Or column = 4 Then Dim UnderlineFont As New Font(Me.DataGridTableStyle.DataGrid.Font, FontStyle.Underline) Dim rect As Rectangle = bounds Dim value As Object = GetColumnValueAtRow(source, rowNum) g.FillRectangle(backBrush, rect) g.DrawString(value.ToString, UnderlineFont, Brushes.Blue, RectangleF.FromLTRB(rect.X, rect.Y, rect.Right, rect.Bottom)) Else MyBase.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight) End If I only create the linklabel look-alike in specific rows and columns. Now I have to have the cursor change to a 'hand' when the mouse moves over a cell. Note! I am creating the datagrid programmatically so I do not know what rows will contain a link (so I can not use the example by George Shepard in sycfusion). Also, there is NOT a mouseup or mousedown event to work with. I only want the cursor to change to a hand on a specific cell, not a whole row. I have been trying to do with with the datagrid.hittestinfo but can't seem the to get it. Thanks! -- Suz Tag: Windows app access db internet Tag: 86041
  - 19
    - Delegate by Book Does anyone know about a good book that teaches Delegates or other types type threading? Tag: Windows app access db internet Tag: 86038
  - 20
    - Switching between MDI child windows... I have an MDI application that is causing slight problems when I try to programmatically switch between child forms. When I press CTRL+TAB, the forms switch without much of a flicker at all. But when I try to fire an MDI switch from a toolbar button, I get a pretty noticeable flicker. The way I am changing forms is through the use of the Activate() method on the child form. For instance, nextChild.Activate(); I've tried using the ActivateMdiChild method, i.e., this.ActivateMdiChild(nextChild); but it doesn't seem to do anything. Is there something that I'm missing? I really just want to know how the framework Form class handles a CTRL+TAB key press so I can do the same thing. Thanks, Rich Tag: Windows app access db internet Tag: 86037
  - 21
    - Smarthclient and crystal rpt viewer Morning all, How is this viewer suppose to be deployed in a Smartclient app. I keeping having my app looking for Keycodev2.dll. I have added this to my project and copied the dll to the folder on the webserver where my exe is. what do I have to do to get this to work. -- Deasun Home Site: www.tirnaog.com Check out: The Code Vault in my forums section. Tag: Windows app access db internet Tag: 86036
  - 22
    - OnSetComplete, OnSet methods do not fire I have a datagrid bound to a strongly typed collection implementing iBindingList. When an item is added to the datagrid, OnInsertComplete fires just fine as I would expect it to. However, the OnSet and OnSetComplete methods don't seem to be firing at all. What I really want to do is: When a row is added to the list (NOT the first row), default one of the columns from the row above it. So when row2 gets added, it should automatically have the value from row1's column X. Any thoughts/suggestions? Tag: Windows app access db internet Tag: 86035
  - 23
    - Capturing web page into a bitmap via WM_PRINT Hi, I'm copying the image of a web page into a bitmap by loading the page first into the web browser control (AxSHDocVw.AxWebBrowser) and then sending the WM_PRINT message to the control. Everything works fine except for pages that have Flash animations on them. In those cases the bitmap comes out as blank white. My code is similar to the code in this blog: http://kentb.blogspot.com/2005/03/nice-form.html . I don't think there's anything fundamentally wrong with the code as it works fine for web pages that have no Flash animations. I wonder if anyone has encountered similar problems? I'd be also happy if I could somehow disable the Flash animations via MSHTML if that fixed the problem. Regards, Sami Tag: Windows app access db internet Tag: 86033
  - 24
    - Problems with custom events Browsing through some online tutorials, I've been tryingto add a custom event to an app I'm developing but I'm having a little problem. Simplifying the code down to the following (a form with a button that fires the event): namespace CustomEvent { public delegate void MyEventHandler(object sender, MyEventArgs e); /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { public event MyEventHandler MyEvent; protected virtual void OnMyEvent(MyEventArgs e) { MyEvent(this, e); } << snip template form code >> private void button1_Click(object sender, System.EventArgs e) { OnMyEvent(new MyEventArgs("Fred")); } } public class MyEventArgs: EventArgs { private string name; public MyEventArgs(string name) { this.name = name; } public string Name { get {return name;} } } } The problem I'm having is that the MyEvent(this, e); call fails in OnMyEvent(...) with the following error: "An unhandled exception of type 'System.NullReferenceException' occurred in CustomEvent.exe Additional information: Object reference not set to an instance of an object." Can anyone explain what I'm doing wrong? Cheers in advance Ant Tag: Windows app access db internet Tag: 86032
  - 25
    - Capturing change to TextBox I want to simply capture changes to a TextBox and perform some processing when the user has edited the text. The TextChanged event fires even while the user is editing the text, but I only want to perform my validation when the user finished editing the text and moves off the field (tab, enter, mouse-click somewhere else, etc). The Validated event fires when the user moves off the field but fires even if the user does not change the text! I know I could save the "before value" of the text in a local variable in the Enter trigger and compare this to the current value in the Leave or Validate trigger but this is messy! There must be a simpler way surely. Someone please help! Tag: Windows app access db internet Tag: 86026
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  - 1
    - LIKE A TRANSACTION Hi, I've developped a windows application: I've added some code in order to lauch a merge replication in SQL. My question is: when this code is executing, is it possible to lock the application?? namely nobody can do anything until the code is ended! Thanks for your help :) Tag: Windows app access db internet Tag: 86022
  - 2
    - Compiler error for MessageBox::Show I am getting a very strange compiler error for the following code: catch (OpenGLPanelException *openGLError) { //std::string * errorMessage = new std::string(openGLError->errorString); System::Windows::Forms::MessageBox::Show( "junk" ); //, "OpenGL Error", MessageBoxButtons::OK, //MessageBoxIcon::Exclamation ); exit(1); } The error message is: Compiling... Form1.cpp d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2039: 'MessageBoxA' : is not a member of 'System::Windows::Forms' d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2660: 'System::Windows::Forms::Control::Show' : function does not take 1 arguments d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(246) : warning C4244: 'argument' : conversion from 'double' to 'GLfloat', possible loss of data Build log was saved at "file://d:\MSDev\Shared Projects\OpenGLPanel\Test1\Debug\BuildLog.htm" Test1 - 2 error(s), 1 warning(s) It appears to want to replace the text as if a #define is taking precedence somewhere. The include information is: #include <windows.h> #include <GL\gl.h> #include <iostream> namespace Test1 { using namespace System; using namespace System::ComponentModel; using namespace System::Collections; using namespace System::Windows::Forms; using namespace System::Data; using namespace System::Drawing; using namespace OhioState; If I do not fully scope it, the tooltip seems to indicate MessageBox is the MFC instance. Any help or suggestions? Roger Tag: Windows app access db internet Tag: 86012
  - 3
    - Label and Button text not drawing (Type your message here) I have a small assembly that displays dialogs for logging in and message boxes if an error occurs. The button text and label text in the dialogs isn't drawing when the form is opened by either Dialog.ShowDialog() or MessageBox.Show(). In the case of a dialog, some of the labels appear and some do not. The button text doesn't appear for either dialogs or message boxes. The text draws correctly in the Designer. I was able to 'repair' the dialogs by deleting the controls and re-adding them to the form in the Designer. I don't have that option in a MessageBox. Anyone seen this behavior before? -------------------------------- From: Don Dusich ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>N41D2NHa90W/Q0PaoCYfpw==</Id> Tag: Windows app access db internet Tag: 86009
  - 4
    - Sources for threads Hi all, Does anybody know where I can find some good examples of using threads in c#.net windows applications? Thanks Gav Tag: Windows app access db internet Tag: 86006
  - 5
    - Can I run any app inside a "special" control I'm looking for a control which will allow me to run any app inside a Window/Panel/Tab Specifically I want to be able to save xml files created from XMLSpy to a database in a very specific format - I'd like to run XMLSpy in a window inside this app, then save/retrieve files to/from a sql server db. Not quite seamless integration, but better than nothing. Thanks Tag: Windows app access db internet Tag: 86004
  - 6
    - Menu Shortcut Key Not working I have an MDI winform application. One of the menu items is using CTRL+U as the shortcut and it will not invoke the menu item. Here is a list of things I have tried to resolve the problem. 1) Tested CTRL+U in Word to make sure that the keys are working properly. Success 2) Re-Assigned the menu item a different shortcut. Success 3) Re-Assigned a different menu item the CTRL+U shortcut. Failure 4) Created a new project with one form, and a menu item with the CTRL+U shortcut. Success. 5) I can hot key to the menu item (the underllined letters for the menu items). Success 6) I can click on the menu item. Success Controls on the MDI Parent form 1) CDDB control 2) MCI control 3) menu items Controls on the MDI child form the menu item is affecting 1) Labels 2) text boxes 3) tab control with 2 pages 4) 2 grid controls (1 per page) 5) toolbar Any thoughts/suggestions on why CTRL+U won't work? Thanks, Greg Tag: Windows app access db internet Tag: 86002
  - 7
    - Making it possible for user to move controls on form, how? How can I make it possible for a user to move a control on a form by selecting it and then using the arrow keys to move it to a new location? For instance suppose I have a form that represents the output of a cheque and I want the user to be able to move the date and amount fields so that they cn be printed out at the correct location on his preprinted cheque stock? Any help or a pointer to some sample code would be greatly appreciated. Thanks, RD Tag: Windows app access db internet Tag: 86001
  - 8
    - ISDATE and Regional Settings -- John Tag: Windows app access db internet Tag: 85999
  - 9
    - Refreshing Form on Process Hello, I have a windows application written in VB .NET which pulls a lot of data from different databases into one source. This often takes a long time and therefore I track the progress using a progress bar and a status bar. When the program is running and I use another application the form turns white and doesn't refresh itself until the process is complete. Could anyone advice me/provide a VB example of the best way to keep a windows form refreshed when running, but still restrict the user from setting off another process? Many thanks for your advice. Tag: Windows app access db internet Tag: 85995
  - 10
    - Reusing GUI elements Hello people, I'm new at .NET development so forgive me if I ask about the obvious. There are several forms in my application that have similar groups of = controls. I would like to extract the UI and functionality into a single entity so = I can reuse it in the application. What is the easiest way to implement it? (I don't really want to create a standalone control since the "grouping" = only makes sense inside this particular application). Thank you, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Windows app access db internet Tag: 85992
  - 11
    - Nasty bug with OwnerDrawn context menus on a ComboBox Have a look at the code below. It's a really simple example where I have added two controls to a form, a textbox and a combo box. Both add owner drawn context menus to the controls, but the combobox will NOT draw custom drawn context menu item. I have tried EVERYTHING (deriving from MenuItem and even tried calling TrackPopupMenuEx directly), but it just won't work! I am currently reflecting over the combobox source code (oh joy!), but if anyone can help me, I will BE SOOOOO VERY GRATEFUL!!!! thanks andrew using System; using System.Drawing; using System.Diagnostics; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace ComboContextBug { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private ComboTest comboBox1; private TextBoxTest textBox1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <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.comboBox1 = new ComboContextBug.ComboTest(); this.textBox1 = new ComboContextBug.TextBoxTest(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.SuspendLayout(); // // comboBox1 // this.comboBox1.Location = new System.Drawing.Point(180, 32); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(121, 21); this.comboBox1.TabIndex = 0; this.comboBox1.Text = "comboBox1"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(180, 98); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(121, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "textBox1"; // // label1 // this.label1.Location = new System.Drawing.Point(8, 20); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(168, 52); this.label1.TabIndex = 2; this.label1.Text = "Right click this combo and you will see that the OwnerDrawn item does NOT appear!" + ""; // // label2 // this.label2.Location = new System.Drawing.Point(8, 86); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(168, 52); this.label2.TabIndex = 3; this.label2.Text = "Right click this textbox and you will see that the OwnerDrawn item DOES appear!"; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(336, 157); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.textBox1); this.Controls.Add(this.comboBox1); this.Name = "Form1"; this.Text = "Combo Context Menu Bug"; this.ResumeLayout(false); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } } public class ComboTest: ComboBox { public ComboTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL NOT appear on a ComboBox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } public class TextBoxTest: TextBox { public TextBoxTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL appear on a Textbox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } } Tag: Windows app access db internet Tag: 85991
  - 12
    - Dangling process, when calling ShowDialog twice from Main hi, i've used jason clarks recommendations for handling unhandled exceptions in my winforms app (http://msdn.microsoft.com/msdnmag/issues/04/06/NET/default.aspx). if an unhandled exception happens, i open up an 'Error-Logger' form, which sends the exception to a web service. here is the relevant code: [STAThread] public static void Main() { try { SubMain(); } catch (Exception e) { HandleUnhandledException(e); } } public static void SubMain() { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(OnUnhandledException); // CLR Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(OnGuiUnhandedException); // Windows Forms Application.Run(new MainForm()); } public static void HandleUnhandledException(Object o) { if(o == null) { MessageBox.Show("An unknown error has occurred", "Error"); return; } Exception ex = o as Exception; if (ex != null) new ErrorLogger(ex).ShowDialog(); } this approach works very well. the problem of a dangling process occurs if the user closes the ErrorLogger form before it has finished reporting the error. A ThreadAbortException happens (which i catch and ignore) in ErrorLogger, and the error logger form closes. if i then close the mainform, the process is left dangling in task manager with no windows open. this only happens if the user kills the errorlogger form. the errorLogger form calls the web service on a worker thread, but i am careful to Abort this thread in Dispose() and Form.Close() and even when the ThreadAbortException happens. is there any way for me to work around this? maybe the application is creating two UI threads because ShowDialog is called twice, and only one of those threads gets properly terminated when the application is closed? thanks for any help tim Tag: Windows app access db internet Tag: 85989
  - 13
    - detecting instances of my App I want to allow running only one instance of my Application. How can I detect that a previous instance of my WinForm App is running in order to stop the second instance? -- thks Tag: Windows app access db internet Tag: 85985
  - 14
    - Using The NativeWindow Class To Draw A GDI Type Circle On Top Of A DataGrid Possibly In The Override OnPaint I have a requirement to put a GDI style circle or rectangle border around the selected row of a datagrid/ It will overlap into the row above and below the selected row. Doing this in a the OnPaint of a subclassed DataGridTextBoxColum dos not seem like a practical way to do it. I have subclassed a DataGrid and overridden the OnPaint as such: protected override void OnPaint(PaintEventArgs pe) { base.OnPaint(pe); // Create pen. Pen blackPen = new Pen(Color.Green, 2); // Create location and size of rectangle. float x = 15.0F; float y = 53.0F; float width = 500.0F; float height = 20.0F; // Draw rectangle to screen. pe.Graphics.DrawRectangle(blackPen, x, y, width, height); } It works but has refresh problems. Last week Bob Powell [MVP] suggested that I use a NativeWindow class to solve this problem. I've just had the time to get back to this and not being a former C++ person, etc., etc., etc. maybe someone can help with this. The MSDN help screen for the NativeWindow class is this link: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformsnativewindowclasstopic.asp It has an example and in the subclassed NativeWindow constructor it creates a button: public MyNativeWindow(Form parent) { ..see help example } Can someone advise me on where my code above that paints the Rectangle should go in this NativeWindow example? Tag: Windows app access db internet Tag: 85977
  - 15
    - Creating DesignerVerbs for a Reflection.Emit-ed class for use in a PropertyGrid Hi, I've hit a bit of a brick wall in my use of the PropertyGrid control. I am writing a Windows Forms application that does the following: - dynamically create a class using Reflection.Emit - the class simply holds a number of properties ("Name", "Description", etc). - pass the class to a PropertyGrid control which then renders the properties for the user to edit. This is all working fine, and I have even added my own Category and Description attributes to the properties which are showing up successfully in the PropertyGrid. My problem is that I would also like to add a couple of DesignerVerbs to the class, so that I can offer "Add Property" and "Remove Property" functions in the PropertyGrid. I have set the CommandsVisibleIfAvailable flag on my PropertyGrid, and attempted to set the Designer attribute on my dynamically-created class. The Designer attribute points to a custom ComponentDesigner class, in which I have defined the DesignerVerbs. However, the verbs are not being shown in the PropertyGrid. I may have a lead in that the Attributes property of my TypeBuilder class still says "NotPublic" after I SetCustomAttribute. But does that mean the contents of the Attributes collection are not public, or that my class' only attribute is "NotPublic"? Any ideas on something I might have missed? Below is some example code, in the hope that it jogs someone's memory! I'd be happy to post anything else that may be relevant. Cheers Lee ********************************************** *** snippet from DynamicCmSchemaCreator.cs *** *** creates the DesignerAttribute using my *** *** custom ComponentDesigner class *** TypeBuilder typeBuilder = moduleBuilder.DefineType ( DynamicType, TypeAttributes.Class, typeof(Component) ); // Apply the Designer attribute, supplying our own ComponentDesign class CustomAttributeBuilder customAttributeBuilder = new CustomAttributeBuilder ( typeof(DesignerAttribute).GetConstructor(new Type[] { typeof(Type) }), new object[] { typeof(DynamicCmSchemaComponentDesigner) } ); typeBuilder.SetCustomAttribute(customAttributeBuilder); ******************************************* *** DynamicCmSchemaComponentDesigner.cs *** *** the componentdesigner I attach to *** *** the dynamic class *** public class DynamicCmSchemaComponentDesigner : ComponentDesigner { private const string AddPropertyVerb = "Add Property"; private const string RemovePropertyVerb = "Remove Property"; private DesignerVerbCollection verbs; private void OnAddPropertyVerb(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine("Processing Add Property"); } private void OnRemovePropertyVerb(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine("Processing Remove Property"); } public override DesignerVerbCollection Verbs { get { if (verbs == null) { verbs = new DesignerVerbCollection(); verbs.Add(new DesignerVerb(AddPropertyVerb, new EventHandler(OnAddPropertyVerb))); verbs.Add(new DesignerVerb(RemovePropertyVerb, new EventHandler(OnRemovePropertyVerb))); } return verbs; } } } **************************************** *** snippet from MainForm.cs *** *** creates the dynamic class and *** *** passes it to the propertygrid *** object dynamicCmSchema = DynamicCmSchemaCreator.CreateDynamicCmSchema ( node.CmSchema.Properties ); this.propertyGrid.SelectedObject = dynamicCmSchema; ******************************************* Tag: Windows app access db internet Tag: 85969
  - 16
    - Does MS will provide a RCP like Eclipse RCP or Macromedia Flex? The smart client offered by MS is more like a concept and the features is more separately. I think the client application vender need a clien side framework like Eclipse RCP. Does MS or any others provide one for .NET? -- Niciyou Beijing, China Tag: Windows app access db internet Tag: 85968
  - 17
    - How to get the selected node of TreeView when context menu popup? When user right click the tree node, a context menu popup. But I can not get the node clicked calling TreeView.SelectedNode property correctly because the default selection behavor of TreeView is left click. How can I get the correct tree node when context menu popup? Thanks. Tag: Windows app access db internet Tag: 85963
  - 18
    - Architectural Guide to Winforms Development? I'm primarily a class library developer, but I've written a few small tools in my day using forms (VB6/Java/Winforms) and my libraries have been used in larger forms apps. The thing is, I've never seen a well architected forms app in my 12-year career and I'm wondering if there is a book or some resource that deals specifically with designing a forms app. In the class library/component world, it's relatively easy to implement design patterns and graceful object-oriented designs, I suppose because we don't have to keep so many balls in the air and visually interact with users. Are there common patterns and designs for forms development? I understand and have implemented simple Model-View-Controller and Model-View designs, but I'd like to know of other designs (are there any?) and how compatible they are with WinForms development. I would love to have a resource that goes deep into some of the common issues with forms like forms management (ie organizaing, caching, reusing), use of dialogs, data encapsulation, messaging between GUI objects, and so on. I'm quite comfortable with the mechanics of WinForms, so I'm looking for something more design-oriented. Thanks for any pointers. Tag: Windows app access db internet Tag: 85962
  - 19
    - Property grid with listview I'm using a listview as my drop down in my property grid editor and everything for the most part works fine. However, if I don't have the properties view pinned and I click on another property while the drop down is open, it seems to give me an error of Invalid Property value. The details say Object type cannot be converted to target type. This does not happen if I have the properties window pinned down though. I don't understand why this is happening and how I can stop it. Lance Johnson Tag: Windows app access db internet Tag: 85955
  - 20
    - Timers and threading Hi, I am writing a program that handles authentication, and based on the user's permission level, can do certain things in the program. However, I want to have a global 10 minute time out in case a user is idle for that amount of time. To do this, I am using a timer from System.Timers. At the end of the 10 minute timeout, I want the timer to call methods within the program to limit access to certain functionality. However, the problem is that the timer is working on a different thread, and so calls to these methods will also be on this thread, which is not the owner thread of the controls I am trying to alter, and so I'm getting an exception. How can I tell the owner thread to manipulate the controls? Thanks! Tag: Windows app access db internet Tag: 85952
  - 21
    - dyn buttons I'd like to add buttons dyn to a form, i can create new buttons, new .name & .text properties, but i can't figure out the eventhandler example I want to create a grid of buttons based on the itemno from a database, then clik on the button & have it add that itemno to a list box, or database... Thanks!! -- Scott Kramer CDS Technologies, Inc. www.team501.com Tag: Windows app access db internet Tag: 85951
  - 22
    - User controls: Propagating new changes to placed controls Hello, I've taken a button component and extended it's functionality by adding a couple small methods and properties. This control is contained within my project tree and has been used on various locations of my form. Now, I want to add another property to the control. In doing so I had hoped that this change would have been propagated to the older controls, however, it's only showing up in a control that's placed on the form for the first time. How do I make the change propagate to the other controls without deleting and replacing them? Thanks, Chris Tag: Windows app access db internet Tag: 85948
  - 23
    - optimize .net app with a lot of graphic background images Hello, I have a winform that looks beautiful. All the panels have bacground images. I even have rollover buttons for the main navigation. My problem is that it loads slower than a "plain" winform app. Also when minimizing the form and switching back to my application it has "blank sections" that occur for a few moments. Right now my application is just a shell, there is no "programming code". All the code has been done in the forms designer except for the rollovers. What can I do to 1) optimize the performance overall of the application 2) make repaints quicker 3) generally run faster Right now the only way I know to "optimize" the application is (a) write efficient code and (b)Setting the "Configuration" to "Release" and (c) setting "Optimize Code" to "true". Thanks, Tom Tag: Windows app access db internet Tag: 85945
  - 24
    - BUG: SizeGripStyle does not support XP visual style (themes) This is probably question to Microsoft WinForms support. My C# application has XP visual styles enabled through Application.EnableVisualStyles() call and everything is fine except for (at least) grip of my Form1 app-wizard created form - it still old style grip. However, when I show OpenFileDialog from my application - this system dialog has correct (XP) style. Boris Tag: Windows app access db internet Tag: 85944
  - 25
    - UserControl Text property I have a control that derives from UserControl. In addition, I have overriden the Text property and put the attributes on it so it shows up int the designer. However, it will not save the value no matter what I do. I've applied every attribute I can think of. Any help in this matter is appreciated. Lance Johnson Tag: Windows app access db internet Tag: 85941

Hi,

I built a windows form client app that access a db on a network. Now I was
wondering how can I set it up so that the app accesses the database through
the web? I don't want to rebuild the client app into an asp.net app. Maybe I
could or should use Web Services that sits on a web server with database and
do my updating through this route. What do you guys/gals think?

Thanks,

JJ

Top

Re: Windows app access db internet by Norman

Norman
Fri Apr 01 13:45:11 CST 2005

Web services may be the only option. You can hardly find any ISP that allows
users to directly access database they host through the Internet.

"JJ" <JJ@discussions.microsoft.com> wrote in message
news:B9E83E19-9F9E-4E86-9D33-129D41C7BD0D@microsoft.com...
> Hi,
>
> I built a windows form client app that access a db on a network. Now I
was
> wondering how can I set it up so that the app accesses the database
through
> the web? I don't want to rebuild the client app into an asp.net app. Maybe
I
> could or should use Web Services that sits on a web server with database
and
> do my updating through this route. What do you guys/gals think?
>
> Thanks,
>
> JJ

Top

Re: Windows app access db internet by JJ

JJ
Fri Apr 01 13:55:02 CST 2005

Hi Norman,

The web server is our own. So what options are available and make the most
sense to use?

Thanks,

JJ

"Norman Yuan" wrote:

> Web services may be the only option. You can hardly find any ISP that allows
> users to directly access database they host through the Internet.
>
> "JJ" <JJ@discussions.microsoft.com> wrote in message
> news:B9E83E19-9F9E-4E86-9D33-129D41C7BD0D@microsoft.com...
> > Hi,
> >
> > I built a windows form client app that access a db on a network. Now I
> was
> > wondering how can I set it up so that the app accesses the database
> through
> > the web? I don't want to rebuild the client app into an asp.net app. Maybe
> I
> > could or should use Web Services that sits on a web server with database
> and
> > do my updating through this route. What do you guys/gals think?
> >
> > Thanks,
> >
> > JJ
>
>
>

Top