Single connection used in multi thread environment

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  - 1
    - Disk imaging software I have Media Center 2005 rollup installed on my pc in a raid 1+0 array. I would like to create a disk image to a separate drive so that I can move to new hardware and then resetup as raid 1+0 without losing my O.S. install and media files because it would be a real pain to have to reinstall everything from scratch. I have not found any disk imaging software that says it supports media center can anyone recommend a reliable software? Also any best practices on making the hardware move I listed above? Thanks in advance for any help. Tag: Single connection used in multi thread environment Tag: 118064
  - 2
    - Help with Impersonation and GetDirectories I'm issuing Directory.GetDirectories(MyPath) and it returns an access violation error. It is a windows application (not a web application) and running locally at my desktop, not across a network. When I skip over the impersonation step, it runs under my account and works fine, because I have rights there. However, the account I am impersonating is an administrative account, and also has permissions to this directory. (All directories, in fact.) The only thing I can think of that is unusual about this is that MyPath points to a network drive: G:\projects\...yaddayadayadda... Is there a known issue with requesting a list of directories while under an impersonated session? If so, is there a workaround? Any help would be incredibly appreciated. Thank you. --Jerry Tag: Single connection used in multi thread environment Tag: 118061
  - 3
    - Is it a bug or I am doing something wrong. Hi Guys, Sorry if I am posting it again. My first mail did not go through looks like. Please help me. I am having a strange issue. Not sure if I am doing something wrong or this is a bug. This is a sample code. This contains 2 text boxes(txtName, txtPhone) and 2 buttons (btnAdd, btnSave) Table(dtCustomers) contains three rows, with customer name "a", "b" and "c". Now I press "btnAdd" button to add a new row. I type "d" as name and "123" ad phone number. Now I press save. That's when the problem occurs. Momemt I press cm.EndCurrentEdit, it not only changes the position but it also change the row. Instead of staying with customer "d" it goes to customer "b". And I have no clue why it goes to customer "d", when it should only change the position based on the sort. Please help me. I am stuck on this for some time now. Let me know I need to include something. Please also let me know if you cannot duplicate this issue. I am using Visual Studio 2005 version 8.0.50727.762 (SP.050727-7600) Dim cm As CurrencyManager Dim dtCustomers As New DataTable Sub New() ' This call is required by the Windows Form Designer. InitializeComponent() ' Add any initialization after the InitializeComponent() call. dtCustomers.Columns.Add("CustomerID", GetType(Integer)) dtCustomers.Columns.Add("Name", GetType(String)) dtCustomers.Columns.Add("Phone", GetType(String)) dtCustomers.Rows.Add(New Object() {1, "a", "1111"}) dtCustomers.Rows.Add(New Object() {2, "b", "2234567890"}) dtCustomers.Rows.Add(New Object() {3, "c", "3234567890"}) dtCustomers.DefaultView.Sort = "Phone" cm = CType(Me.BindingContext(dtCustomers.DefaultView), CurrencyManager) Me.txtName.DataBindings.Add("Text", dt.DefaultView, "Name") Me.txtPhone.DataBindings.Add("Text", dt.DefaultView, "Phone") dtCustomers.Columns("CustomerID").DefaultValue = -1 End Sub Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click Me.cm.AddNew() End Sub Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click Dim _CustomerID As Integer = Me.cm.Current("CustomerID") Me.cm.EndCurrentEdit() If Me.cm.Current("CustomerID") <> _CustomerID Then Stop Exit Sub End If End Sub Tag: Single connection used in multi thread environment Tag: 118058
  - 4
    - Clickonce and license question question We have an application that we are using Clickonce to install on client computers. Once the application is installed, the user runs the application and is required to register the application with a license key that was e-mailed to the user along with the ClickOnce link. The registration process updates the SQL server at our ISP that the license key is now in use. We are having problems with some of our corporate users who have strict firewalls. They are unable to register the application and they get an SQL error. We switched the registration so that it now uses a webservice instead of directly linking to the SQL server but we are still having problems with some corporate users / firewalls. I am wondering if there is a better way? Basically, we want to limit each user to 1 installation per license key and we want to document when the license key has been used. The application is updated very often, so we also keep track of which version the users have installed. The added problem is that everytime we have an update, the user basically re-registers the application with the new version. I would appreciate any suggestions that could make the process simpler for both the users and our team. Thanks, John Tag: Single connection used in multi thread environment Tag: 118051
  - 5
    - private field loses its value Hi, I defined two classes and a delegate to trigger events from one class to another. The following is my code: namespace MyApp { public delegate void DelegateA(object sender, MyEventArgs e); public partial class A : Form { public B b; private DelegateA DataDelegate; public A() { if (DataDelegate == null) { DataDelegate = new DelegateA(Data_Event); } if (b == null) { b = new B(); b.RDataEvent += DataDelegate; } } public void Data_Event(object sender, MyEventArgs e) { if (e.MyParam == 30) { string data = b.GetDataString(); //Do something } else if (e.MyParam == 10) { //Do something else } } } public class B { private static SerialPort comport; public event DelegateA RDataEvent; private const string port = "COM3"; private const int baudRate = 9600; private const Parity comParity = Parity.None; private const int dataBits = 8; private const StopBits stpBits = StopBits.One; private string DataString = ""; public B() { if (comport == null) { comport = new SerialPort(port, baudRate, comParity, dataBits, stpBits); comport.ReadTimeout = 50; comport.WriteTimeout = 100; comport.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); if (!comport.IsOpen) { comport.Open(); } } } void AnotherEventMethod() { MyEventArgs MyE = new MyEventArgs(); MyE.MyParam = 10; RDataEvent(this, MyE); } private int WorkOnData(byte[] buffer) { IsolateData(buffer); MyEventArgs e = new MyEventArgs(); e.MyParam = 30; RDataEvent(this, e); } public void IsolateData(byte[] buffer) { string data = ""; //calculates data according //to buffer //Eventually: DataString = data; } public string GetDataString() { return DataString; } } } My problem is that the private string DataString of class B becomes equal to its initial state ("") when I call GetDataString() after receiving the event. It doesn't happen in the first instance of Form A though, but only after I close it and open it again. However, if I make this a static string this problem seems to be solved. Can someone please explain why is it? Is it related to b being public in A? Another question is whether I can create another class C that will function in a similar way to class A and will also be able to receive events from class B. How do I do it? Thank you very much Tag: Single connection used in multi thread environment Tag: 118050
  - 6
    - How to disable menu shortcut keys I have shortcut keys to my menu in VS 2008 windows forms. I disable the menu item when the menu is clicked; that works fine. But the user can still press the shortcut key. What is the PREFERRED way to handle shortcut keys and when pressed, check them to verify they are valid. I was thinking of the KeyDown event in the form. amil Tag: Single connection used in multi thread environment Tag: 118045
  - 7
    - HTML Help Workshop and Vista? Hi: I need to add a Help system to a commerical POS system I developed in WinForms. The most recent version available from MS doesn't say it supports Vista. Only XP and earlier. Wierd. What do I do? Thanks, Charlie Tag: Single connection used in multi thread environment Tag: 118044
  - 8
    - Create icon with overlay How would one go about doing this: 1. Load an icon from an application resource 2. Load the SystemIcons.Warning icon 3. Shrink the warning icon 4. Overlay and combine the shrunken warning icon on top of the application icon to produce one icon 5. Use/Show the icon Thanks Tag: Single connection used in multi thread environment Tag: 118043
  - 9
    - Application.ThreadException VS2008 VB. I add a handler for Application.ThreadException. It works fine, except for one unexpected behavior. If I programmatically throw an exception, and that exception specifies an InnerException, then the ThreadException event handler is called with the inner exception, not the one that was thrown. Any idea why this happens and what I can do to see the original exception? Tag: Single connection used in multi thread environment Tag: 118042
  - 10
    - User settings two different folders for MyApp ClickOnce and .exe Hi, I have MyApplication published through ClickOnce. MyApplication has 2 functionalities: can be restarted if user chooses so, and user can save one custom user setting, i.e. his/her name. User installs MyApplication from the ClickOnce location. Then runs it using MyApplication ClickOnce application reference. User types in his name and clicks "Save". Then user clicks "Restart". Now, here comes the twist. In MyApplication I perform the restart by using: Process.Start(<relative .exe file path>, <parameter>); and so, notice that it is not relaunched by using the ClickOnce app reference, but I do it purposefuly because I want to be able to pass in a parameter on the restart. So, now I have MyApplication restarted, however I notice that the name (that user has just typed in and saved) appears to not have been saved. Why? it turns out that user settings are saved in two different locations: for MyApplication run through ClickOnce app reference, and when it is run by directly calling .exe file. Can I make ClickOnce to somehow use the same location for user settings as .exe file? Or vice versa? Has anyone run into this problem? Any solutions? Thanks, --Michal Tag: Single connection used in multi thread environment Tag: 118041
  - 11
    - COM1 not working Hi, I have a Dell laptop with XP Pro SP3 for my business. I have a program (Doors) that uploads data to a security system. I do these uploads about once a month. I connect to the security system via an AOpen external modem thruogh the COM1 port. It all worked fine for years but...I had to reinstall XP and now I can't get it to work. Windows recognizes the modem and prompts me to load the install CD and the drivers do get installed, according to device manager. I've uninstalled/reinstalled that program, can call my cell through hyperterm, device manager has a query to test it and it seems to pass. The program comes with a "COM port loopback test plug" and a program to test the port. The port fails that test saying that there must be either another program using that port or the port is no good. I don't know what to do. Any thoughts? Ed Tag: Single connection used in multi thread environment Tag: 118033
  - 12
    - IP address appearing with phone symbol in DHCP server Hi, In our setup we had configured a DHCP. In this DHCP under address leases there were list of IP address with a phone symbol( which appear in RAS) even deleting these IP address it's once again getting assigned. What may be the problem. Regards Tag: Single connection used in multi thread environment Tag: 118032
  - 13
    - ToolStripSplitButton how to set as checked Let me first give some context so you know what I'm trying to do. I'm building a Table PC app and I want a ToolStrip that contains three buttons, one is a pen that has a drop down to select the color, one is a highlighter that has a drop down to select the color, and the third is an eraser. The buttons should indicate which tool is selected. This is something similar to what is in the Windows Journal tool strip. The problem I'm having is that ToolStripSplitButton does not have a checked property so I cannot indicate that the button is selected when a user clicks on it. Does anyone have a solution to display it as checked or any suggestions on how to accomplish what I need. Thanks, Nolan Tag: Single connection used in multi thread environment Tag: 118029
  - 14
    - BUG in TabControl Mouse Events? There is an area between bottom of tab header and top of tab page that does not receive any mouse events. Area's height is 2 pixels. Any clicks, mouseover and etc events are received by control that is UNDER tabControl. Problem exists only in .NET - not in win32. In the snippet : Run the program and slowly move mouse from tab control header ("tabpage1" text) to the tab page and backwards. There is a label that shows on which control was last mouse move event. When mouse is between tabpage and tab header the label shows GroupBox despite the fact that we are on tabcontrol. The same is with click events. The snippet prints to console control on which click is performed. When we click exactly on the 2 pixels between tab header and tabpage click is also on GroupBox control that is under TabControl. Is this a bug? Any workaround for this? using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace TabProblem { public class Form1 : Form { /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.groupBox1 = new System.Windows.Forms.GroupBox(); this.label1 = new System.Windows.Forms.Label(); this.tabControl1 = new System.Windows.Forms.TabControl(); this.tabPage1 = new System.Windows.Forms.TabPage(); this.groupBox1.SuspendLayout(); this.tabControl1.SuspendLayout(); this.SuspendLayout(); // // groupBox1 // this.groupBox1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte) (255)))), ((int)(((byte)(192))))); this.groupBox1.Controls.Add(this.tabControl1); this.groupBox1.Location = new System.Drawing.Point(67, 76); this.groupBox1.Name = "groupBox1"; this.groupBox1.Size = new System.Drawing.Size(375, 272); this.groupBox1.TabIndex = 0; this.groupBox1.TabStop = false; this.groupBox1.Text = "groupBox1"; // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(503, 86); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(35, 13); this.label1.TabIndex = 1; this.label1.Text = "label1"; // // tabControl1 // this.tabControl1.Controls.Add(this.tabPage1); this.tabControl1.Location = new System.Drawing.Point(51, 70); this.tabControl1.Name = "tabControl1"; this.tabControl1.SelectedIndex = 0; this.tabControl1.Size = new System.Drawing.Size(200, 100); this.tabControl1.TabIndex = 2; // // tabPage1 // this.tabPage1.BackColor = System.Drawing.Color.FromArgb(((int) (((byte)(255)))), ((int)(((byte)(255)))), ((int)(((byte)(192))))); this.tabPage1.Location = new System.Drawing.Point(4, 22); this.tabPage1.Name = "tabPage1"; this.tabPage1.Padding = new System.Windows.Forms.Padding(3); this.tabPage1.Size = new System.Drawing.Size(192, 74); this.tabPage1.TabIndex = 0; this.tabPage1.Text = "tabPage1"; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(697, 422); this.Controls.Add(this.label1); this.Controls.Add(this.groupBox1); this.Name = "Form1"; this.Text = "Form1"; this.groupBox1.ResumeLayout(false); this.tabControl1.ResumeLayout(false); this.ResumeLayout(false); this.PerformLayout(); } private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.TabControl tabControl1; private System.Windows.Forms.TabPage tabPage1; private System.Windows.Forms.Label label1; public Form1() { InitializeComponent(); tabPage1.Click += new System.EventHandler(LogClick); tabControl1.Click += new System.EventHandler(LogClick); groupBox1.Click += new System.EventHandler(LogClick); label1.Click += new System.EventHandler(LogClick); tabPage1.MouseMove += new MouseEventHandler(LogMouseMove); tabControl1.MouseMove += new MouseEventHandler(LogMouseMove); groupBox1.MouseMove += new MouseEventHandler(LogMouseMove); label1.MouseMove += new MouseEventHandler(LogMouseMove); } void LogMouseMove(object sender, MouseEventArgs e) { label1.Text = sender.GetType().Name; } private void LogClick(object sender, EventArgs e) { Console.WriteLine("Click on " + sender.GetType().Name); } /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } } Tag: Single connection used in multi thread environment Tag: 118024
  - 15
    - How do I add data objects with more than one format to the Clipboard? How do I add data objects with more than one clipboard format to the Clipboard in c#. Tag: Single connection used in multi thread environment Tag: 118021
  - 16
    - How to Avoid Windows Security Alert?? Hi, I have created a windows forms application, where i am using a C dll for network communication. When i install the application and run it for the first time, i get a Windows Security Alert which says that ************************************************************************************************************************************************ To help protect your computer, Windows firewall has blocked some features of this program. Do you want to keep blocking this program? Name: <application name> Publisher: Unknown Keep Blocking Unblock Ask me Later Windows firewall has blocked this program from accepting connections from the internet or a network. If you recognize the program or trust the publisher, you can unblock it. When should i unblock a program? ************************************************************************************************************************************************ Any ideas how can i avoid this security alert? Regards, Ankit!! Tag: Single connection used in multi thread environment Tag: 118020
  - 17
    - Creating a WINPE boot CD I am trying to create a WINPE boot cd so I can use ImageX to store images of the system we setup. I have downloaded 3 different set of instructions. @ I have followed all the way through. When I try to boot from the CD with the ISO file on it the system will not boot from it. The last set os instructions talk about using a BCD store to boot from. I followed all steps up to were it states "The last command returns a GUID value. Substitute GUID with this value in the following examples." The command before this line said it created the file successfully. It created a value contaning numbers, dashes and letters, total 35. I then place this number in the next comand line were the <GUID> is in the command. After I hit enter i get " THE SYSTEM CANNOT FIND THE FILE SPECIFIED." I do a search on the system and it dose not show up. So if the file was created, were did it go? Tag: Single connection used in multi thread environment Tag: 118016
  - 18
    - Continuation of Keeping a window on top...... So I created a project with just a windows form in it. I put a shockwave player on it. I added an event for keyup to grab key strokes. It didn't respond to key strokes. I took out the flash player, the key strokes work. So it looks like the shockwave player is grabing the keystrokes. How do I make this not happen. I'm using C# 1.1 ( VS 2003 ) and I'm including the following DLLS: AxInterop.SHDOCVw.dll - version 1.1.0.0, Runtime version 1.1.4322 AxInterop.ShockwaveFlashObjects.dll - version 1.0.0.0, Runtime version 1.1.4322 AxInterop.WMPLib.dll - v 1.0.0.0, Runtime version 1.1.4322 Any thoughts? TIA - Jeff. Tag: Single connection used in multi thread environment Tag: 118010
  - 19
    - Help - How am I misusing FileIOPermission? Hi, I'm trying to test permission to access the file system, using FileIOPermission, but can't seem to get it to work. See my sample app below, for an app that tries to demand a permission to read a specified path, and then calls Directory.GetFiles on that path. The Demands on FileIOPermissions (I tried 3 variations) all work, and then when I call Directory.GetFiles an exception is thrown... saying 'request for FileIOPermission failed'!. (NB: when run in full trust (local path) the Directory.GetFiles runs successfully). Can anyone explain how to check for permissions? Here is the output of the app, when run from an intranet path, with intranet security level set to 'one step down from full trust': ------------------------------------------- . . . System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Cultur e=neutral, PublicKeyToken=b77a5c561934e089' failed. at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) at System.Security.CodeAccessPermission.Demand() at System.IO.Directory.InternalGetFileDirectoryNames(String path, String userPathOriginal, String searchPattern, Boolean includeFiles, Boolean incl udeDirs, SearchOption searchOption) at System.IO.Directory.GetFiles(String path, String searchPattern, SearchOption searchOption) at System.IO.Directory.GetFiles(String path) at TestTrust.Program.Main(String[] args) The action that failed was: Demand The type of the first permission that failed was: System.Security.Permissions.FileIOPermission The Zone of the assembly that failed was: Intranet Here is the sample application: ------------------------------------------- using System; using System.IO; using System.Security.AccessControl; using System.Security.Permissions; class Program { static void Main() { try { Console.WriteLine("."); new FileIOPermission(FileIOPermissionAccess.Read, @"c: \").Demand(); Console.WriteLine("."); new FileIOPermission(FileIOPermissionAccess.PathDiscovery, AccessControlActions.View, @"c:\").Demand(); Console.WriteLine("."); new FileIOPermission(PermissionState.Unrestricted).Demand(); Console.WriteLine("."); Directory.GetFiles(@"c:\"); } catch (Exception e) { Console.WriteLine(e); } Console.ReadLine(); } } Tag: Single connection used in multi thread environment Tag: 118009
  - 20
    - How to detect if the text in a "DataGridView" cell is currently truncated Hi there, Does anyone know how to detect if the text in a "DataGridView" cell is currently truncated, i.e., currently displaying "..." at the end of a "DataGridViewTextBoxCell" (or any cell for that matter). Thanks. Tag: Single connection used in multi thread environment Tag: 118005
  - 21
    - Keeping a window on top and having it respond to keystrokes. I have a window that I'm forcing to stay on top. The window is full screen with no border (I am running as a kiosk). I have some keystrokes that the window is supposed to respond to. I have it make itself topmost about every 30 seconds and force it to be the topmost window. Problem is - the menu doesn't respond to keystrokes. And it worked up until about two months ago and apparanetly I did something to it so it won't work. So what do I need to do to make a window always on top (that's got multiple controls on it) that will respond to my keystrokes? TIA - Jeff. Tag: Single connection used in multi thread environment Tag: 118004
  - 22
    - Help authoring tools for WinForms... Hi: I want to integrate a help system into my WinForm app. Any suggestions on where to start? Thanks, Charlie Tag: Single connection used in multi thread environment Tag: 118000
  - 23
    - WMV stream seeking? I originally posted this in the microsoft.public.dotnet.general group but haven't gotten a reply. Thought I'd give it a try here. Any info at all would be appreciated... I'm writing a Netflix Watch Now player application that will be used by special needs kids. The transport buttons need to be fairly large and their function more obvious than those used on the Netflix ActiveX player control. My thought was to use a WMP control hosted on a Winform with a seperate transport bar that includes play, pause, stop, ff, and fr buttons. The stream plays back fine in WMP11 with the exception that the stream position can't be altered. In other words, it's not posible to rewind, fast forward or alter the stream position using the trackbar (it snaps back to its original position). The Netflix control allows seeking the stream using its trackbar control. I've had a look at the http traffic using Fiddler2 and can see that dragging the trackbar thumb results in requests being sent to the server that include a "Content-Range: bytes nnnnn-nnnnn/nnnnnnnn" header. Does anyone know if it's possible to do something similar using a WMP control? I've had a look at VLC and while it allows advancing the stream using the trackbar, playback is a scrambled mess so using the VLC ActiveX isn't a viable solution. Any clues or guidance would be greatly appreciated! Thanks -- Steve Tag: Single connection used in multi thread environment Tag: 117991
  - 24
    - Illegal Filename characters I'm trying to build a SAVE AS routine, like MSWord does - I select and grab the first line of the document and Puts it in the SAVE AS filename dialog However, if there are illegal characters, this won't work correctly. How can I check, ahead of time, if the selection I've made has these illegal characters? Tag: Single connection used in multi thread environment Tag: 117989
  - 25
    - Converting to WPF Apps I am thinking of converting a Windows Forms app to WPF as a learning process. Is there a specific group for WPF? I couldn't find one in my news group list. My first (Hello Jeff) app has very fuzzy text on the Button - I have Unclear-Type turned off on the PC, does WPF turn it on for its own apps? -- Jeff Gaines Damerham Hampshire UK If you ever find something you like buy a lifetime supply because they will stop making it Tag: Single connection used in multi thread environment Tag: 117982
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  - 1
    - Start Menu Missing Last night my updater installed a bunch of updates, but now my start menu doesn't work. I've tried clicking on it and hitting the Windows button on my keyboard but nothing happens. I've tried in the control panel to find missing start menu and a blank box pops up for half a second and disappeared. This has happened before and I think restarting the computer fixed it but not this time. I have Windows Vista Home Premium 32-bit. Tag: Single connection used in multi thread environment Tag: 117980
  - 2
    - translation needed: C to VB Hi, I found the following code in a FAQ about the datagridview. But I am having a hard time translating it to VB, so I would like to ask via here for someone more experienced to translate this code to VB. When I can read it in VB I want to replace everything about the image into a button. Thanks in advance! Eric. public class TextAndImageColumn:DataGridViewTextBoxColumn { private Image imageValue; private Size imageSize; public TextAndImageColumn() { this.CellTemplate = new TextAndImageCell(); } public override object Clone() { TextAndImageColumn c = base.Clone() as TextAndImageColumn; c.imageValue = this.imageValue; c.imageSize = this.imageSize; return c; } public Image Image { get { return this.imageValue; } set { if (this.Image != value) { this.imageValue = value; this.imageSize = value.Size; if (this.InheritedStyle != null) { Padding inheritedPadding = this.InheritedStyle.Padding; this.DefaultCellStyle.Padding = new Padding(imageSize.Width, inheritedPadding.Top, inheritedPadding.Right, inheritedPadding.Bottom); } } } } private TextAndImageCell TextAndImageCellTemplate { get { return this.CellTemplate as TextAndImageCell; } } internal Size ImageSize { get { return imageSize; } } } public class TextAndImageCell : DataGridViewTextBoxCell { private Image imageValue; private Size imageSize; public override object Clone() { TextAndImageCell c = base.Clone() as TextAndImageCell; c.imageValue= this.imageValue; c.imageSize = this.imageSize; return c; } public Image Image { get { if (this.OwningColumn == null || this.OwningTextAndImageColumn == null) { return imageValue; } else if (this.imageValue != null) { return this.imageValue; } else { return this.OwningTextAndImageColumn.Image; } } set { if (this.imageValue != value) { this.imageValue = value; this.imageSize = value.Size; Padding inheritedPadding = this.InheritedStyle.Padding; this.Style.Padding = new Padding(imageSize.Width, inheritedPadding.Top, inheritedPadding.Right, inheritedPadding.Bottom); } } } protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts) { // Paint the base content base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts); if (this.Image != null) { // Draw the image clipped to the cell. System.Drawing.Drawing2D.GraphicsContainer container = graphics.BeginContainer(); graphics.SetClip(cellBounds); graphics.DrawImageUnscaled(this.Image, cellBounds.Location); graphics.EndContainer(container); } } private TextAndImageColumn OwningTextAndImageColumn { get { return this.OwningColumn as TextAndImageColumn; } } } Tag: Single connection used in multi thread environment Tag: 117974
  - 3
    - Docking framework Is there any docking frame work for winforms ? i mean, some simmilar to visual studio where you can drag a control docking it in other parts of the container, or in other container, or make it a popup window ? I suppose WTL,MFC and wxWidgets implement them. Will there be this anytime soon for winforms ? Thanks, Fernando Tag: Single connection used in multi thread environment Tag: 117971
  - 4
    - WindowsFormsSynchronizationContext.Send: how does the delegate I did look under the hood and this method is calling Control.Invoke(). Digging deeper down I've stopped at the RuntimeMethodHandle._InvokeMethodFast() method whose code I cannot find. I know that the delegates invoked via Control.BeginInvoke() will use the window's message pump to send and retrieve the delegate and its arguments, so the control/form will not react to Windows messages while it is executing the delegate. That is the behavior I want to have as well when the delegate passed to WindowsFormsSynchronizationContext.Send() executes. For a bit of a background, I want to have this behavior in order to make sure that a grid control will not repaint itself while I'm re- populating the DataTable it is bound to. If you have other suggestions on how to ensure that the grid will not read from the DataTable at the same time a worker thread reloads it, please send them my way. We have noticed that the application crashes if a grid reads from a DataTable at the same time the worker thread is busy clearing and repopulating it. The worker thread runs the queries and then merges the results in the DataTable the controls are bound to. It is the merging of the data only that I want to execute on the UI thread. Thanks much, eugen Tag: Single connection used in multi thread environment Tag: 117970
  - 5
    - Usercontrol question Hi, I have created my very first usercontrol. It has a textbox and a button next to it. It working is as follows: Text is displayed in the textbox and if property Hidden is true, then it will display * (real ones) in the box. The normal text value is stored in a tag property. When the user clicks the button, it checks first if the user is allowed and if so, it changes the * for the normal text. Click it again and the text is replaced by * again. What I am trying to do now, is to make the button invisible when the property Hidden is set to True. Me.txtCell.Text = myTag2 If myHidden = True Then btHide.Visible= False Me.txtCell.Text = New String("*"c, Me.txtCell.Text.Length) Else btHide.Visible = True End If Strangely enough not just the button disappears, also the textbox does. Is this normal behaviour? How can I go arround that? Or am I doing something wrong? rg, Eric Tag: Single connection used in multi thread environment Tag: 117967
  - 6
    - Cannot seem to update underlying DataAdapter with Values in Datagrid I'm new to .NET, but certainly not new to development work. I've been trying everything I can think of to get the worlds simplest implementation of a DataGrid to actually update the changes back to the database. I've been working on it for two days and I can't seem to get my "Hello World" datagrid implementation to work. ANY guidance would be most appreciated. I've tried numerous code solutions, but none commit any changes back to the database and none give any sort of error messages. I simply plopped a datagrid on the form, answered the dialog about what datasource to use, chose the insert, update, delete checkboxes, etc... and thought that would be enough. Obviously, it wasn't. Then, I found all kinds of examples about using HasChanged to determine if changes had been made and then dataAdapter.Update to commit the changes. Nothing worked. I can't believe it's this hard. I know I'm doing something wrong, but for the life of me I can't figure out what it is. I'll be happy to post whatever code snippets are needed or even the entire project if it will help. Thanks in advance. Tag: Single connection used in multi thread environment Tag: 117963
  - 7
    - Form inheritance. Dear All, We developed a Form (Entry Form) and set it's properties using the IDE of VB.NEt Then we created another form and decided to inherit the form and the tools on the form. How do I inherit the Entry Form Programmatically? Thanks, CypDr Tag: Single connection used in multi thread environment Tag: 117945
  - 8
    - Multiple app settings Hi My app has settings that are stored in the app configuration file. Is there a way to select a different set of app settings for different pcs, either during setup or when app is run for the first time? Thanks Regards Tag: Single connection used in multi thread environment Tag: 117944
  - 9
    - Image in ImageList in ToolBar: enable/disable How do I get an image to be displayed as grayed out when I place it in a button, in an ImageList in a ToolBar and the button is disabled? When the button is enabled, the image looks great. When the button is disabled, the image does not display. TIA, George Tag: Single connection used in multi thread environment Tag: 117943
  - 10
    - Can One Not Set a ToolTip for a ToolStripProgressBar? Good afternoon. As ToolStripProgressBar does not inherit from Control, it doesn't seem possible to use a ToolTip's SetToolTip feature. Yet it does have a ToolTipText property. Am I missing something? Thanks! Tag: Single connection used in multi thread environment Tag: 117942
  - 11
    - Is a form already loaded? I have a form that might need to load another form. But if that form is already loaded, I need to know this so that I can tell the form to reinitialize to a specific set of data. But how do I know if that form is already up? When I do a Show, there's nothing that tells me that the form is already there. Tag: Single connection used in multi thread environment Tag: 117940
  - 12
    - Adding Disabled Look to Images I would like to render the images in a semi-transparent or grayscale variant of the original to give a disabled look and avoid creating a complete second library of icons & images for the "Disabled State" Is there a way to adjust the ImageAttributes, ColorPallete or some such trick to mute the intensity or opacity of the image? Tag: Single connection used in multi thread environment Tag: 117939
  - 13
    - finding control which will receive focus in validating event How to find out control which will receive focus, when we move out of control using focus. Event is validating. Thanks Tag: Single connection used in multi thread environment Tag: 117938
  - 14
    - DataGridView firing way to many SelectionChangedEvents! Please Help Hi all, I'm really hoping someone can help me with this as it's causing me some serious problems. I have a Windows Forms application using the gridview control. When the user selects a row, the SelectionChanged event fires and I load some more data that's particular to that row. The problem I'm having is that the SelectionChanged event is going way to many times and this is obviously causing me to load the additional data scores of times when it's not necessary. The sorts of things that are causing it to occur are:- - Refreshing the data - Calling ClearSelection - Calling Sort I can certainly understand why these actions would cause the SelectionChanged event to fire, but the problem is the sheer number of times it fires. For example for some reason, when I refresh the binding source's data, it will fire say, 5 times. Then if I do it again, it will become 10 times even though I'm clearing the data and not adding to it. Similarly, when I call sort it seems to cause SelectionChanged to fire once for each row. I've tried all sorts of things like detaching event handlers and then reattaching them after performing a key action but this only helps a little. Sometimes detaching the event handler doesn't seem to do anything - the event still fires! Can anyone help me with some strategy for dealing with this. I'd be really surprised if I were the only person that was experiencing this so I'm hoping someone will be able to help me. Sincerest thanks to anyone who can advise Best Regards Simon Tag: Single connection used in multi thread environment Tag: 117928
  - 15
    - ?? Setting the ClientRectangle in a Custom Control ?? Hi everyone, I'm having a hard time figuring out how to set the ClientRectangle in a custom control I'm writing. Since ClientRectangle has no setter property I cannot change it directly. The idea is that inheritors of this custom control should be limited to drawing in the client portion of the control. As it is now, the entire control surface is the client rectangle. I want the client rectangle to be a small portion of the control. Thanks Tag: Single connection used in multi thread environment Tag: 117927
  - 16
    - Multiple undo/redo controls Okay, you know how you can undo multiple actions in the VS IDE by dropping down the undo/redo button on the toolbar and then selecting from the list? Well, I could easily put a dropdown on the toolbar for those functions, but what I'd really like is the same functionality as the IDE, i.e., as you move your mouse down the list the prior items become highlighted to show you that they're all going to be undone, and the list scrolls automatically. Has anyone come up with a control that does something similar? It's not a critical thing for my app, but it sure would be "nice to have." Tag: Single connection used in multi thread environment Tag: 117924
  - 17
    - Processing command keys [VS 2005, Framework 2.0 (duh)] I just learned about a wonderful thing called the Command Pattern and how it can simplify adding undo/redo capabilities to an app, so I immediately set about implementing it. It's working well. Due to the design of my app, though, I'm having an issue with keyboard shortcuts. Here are the details: My app manages a data file. This file contains one or more "blocks," and each block contains one or more "instructions." The UI is set up with a list view to manage the blocks, a grid to manage the instructions, and a set of controls (text boxes, sliders, and a couple of check boxes) to actually manipulate the data in the active row of the grid. (I'm not allowing in-cell editing on the grid.) I want to provide the standard Ctrl+Z/Y shortcuts for undo/redo (plus the CUA Alt+Backspace, since we should all still be supporting the CUA keys, right folks?), but here's where the problem arises: I don't include edits you make in the text boxes in the list of things that can be undone. The text boxes are just a "scratch area" and nothing is actually changed until you hit the Apply button. Then your entire edit is recorded as an undoable action. However, I want users to be able to use the built-in undo functionality that the text box exposes (because experienced users will probably expect that) so that, for example, if you accidentally highlight a number and type over it, then realize you wanted the original number (but don't know what it was since it was a big ugly decimal) then you can hit Ctrl+Z and rescue yourself without having to hit the Reset button and lose ALL your changes to that row. Okay, with those as the requirements, the trick is to capture Ctrl+Z and NOT activate the menu item Undo (which would undo the last "real" action) and instead let Ctrl+Z be handled by the text box...IF the text box has anything to undo. If it doesn't, then assume the user meant to really undo the last action and do so (cancelling the edit in the process). It's sort of like using MS Access and editing a row. If you've made changes to a cell, hiting Escape once undoes that cell, and hitting it a second time (or if the cell hasn't been modified) cancels changes to the row. A simple method would be to simply not set Ctrl+Z/Y as menu shortcuts and handle them purely through code, but I think it's pretty cheesy not to have those shortcuts display on the Edit menu, especially since it's showing Ctrl+X/C/V etc. So I guess ultimately my problem is aesthetics! (In VB6 I would have set the caption of the menu to be <caption><tab><shortcut> and the shortcut text would be DISPLAYED on the right-hand side of the menu as if it were a real shortcut. I haven't tried it in WinForms but I don't think it's the ideal solution in the first place.) I'm using the 2.0 MenuStrip and not the older Menu controls, if that helps you give me suggestions. What I think I need to do is find a way to handle command keys before the MenuStrip does, and I'm currently reading about the ProcessCmdKey event, but I figured I'd post here in case anyone has done something similar and has advice. Hopefully the answer will involve "hooking" and not loads of derived classes.... Tag: Single connection used in multi thread environment Tag: 117923
  - 18
    - Fast String operations Using C++/CLI but I would imagine C# is the same. What is the fastest to do the following operations 1) Compare two Strings without case-sensitivity. 2) Take a group of objects with 4 string fields and tabulate them, so each field is in a column, in a single String, one line per object with \n separating them, calculating the minimum width required for each column and them formatting the rows so all the fields in each column line up. So at the moment I'm i) Looping over all the objects determining the minimum width of each column. ii) Creating a format string with something like String::Format("{{0,- {0}}}{{1,-{1}}}{{2,-{2}}}{{3}}\n", columnWidth1, columnWidth2, columnWidth3); iii) Then doing pLine += String::Format(pFmt, pLine->Type, pLine- >Name, pLine->Value, pLine->Desc) + "\n"; Anyway to make this faster? TIA, KK Tag: Single connection used in multi thread environment Tag: 117921
  - 19
    - Why did the DataGridViewColumn change Visible ? I made a .net 2.0 Form, that has (among other things) three DataGridViews, that are linked together using master-detail DataTables (the first table has main data, the second has its detail, and the third has the second's details). I fill the DataTables using something like following code firstTable.BeginLoadData(); secondTable.BeginLoadData(); thirdTable.BeginLoadData(); firstTable.Rows.Clear(); secondTable.Rows.Clear(); thirdTable.Rows.Clear(); string firstKey, secondKey, thirdKey; foreach(XmlElement firstEl in ...) { DataRow firstRow = firstTable.NewRow(); firstKey = firstEl.GetAttribute("firstKey"); firstRow["FirstKey"] = firstKey; ... firstRow rest attributes ... firstTable.Rows.Add(firstRow); foreach(XmlElement secondEl in ...) { DataRow secondRow = secondTable.NewRow(); secondRow["FirstKey"] = firstKey; secondKey = secondEl.GetAttribute("secondKey"); secondRow["SecondKey"] = secondKey; .. secondRow rest attributes .. secondTable.Rows.Add(secondRow); foreach(XmlElement thirdEl in ...) { DataRow thirdRow = thirdTable.NewRow(); thirdRow["FirstKey"] = firstKey; thirdRow["SecondKey"] = secondKey; thirdKey = thirdEl.GetAttribute("thirdKey"); thirdRow["ThirdKey"] = thirdKey; ... thirdRow rest attributes .. thirdTable.Rows.Add(thirdRow); } } } firstTable.EndLoadData(); secondTable.EndLoadData(); thirdTable.EndLoadData(); firstTable.AcceptChanges(); secondTable.AcceptChanges(); thirdTable.AcceptChanges(); As I said, this works fine on Form. But, when I moved it to our main program, I had to change Form to Panel. This means that instead of setting up the DataTables and DataGridViews on Load event, I have to set them on a property (where the XML document from which the data is retrieved is set). Now, the DataGridViewColumn corresponding to secondTable "FirstKey" changes from Visible=false to Visible=true (it is not shown, since the value is already on the first DataGridView). I traced the code, and guess "firstTable.EndLoadData()" does the change. Also thirdTable's SecondKey is changed, but not the FirstKey. I kind of solved the problem by setting the columns back to Visible=false, but who gave the .NET right to change the columns, and only on Panel? -- Arto Viitanen Tag: Single connection used in multi thread environment Tag: 117919
  - 20
    - Microsoft report Im using microsoft reportviewer, when i try to visualize a gif image recovered from the database, the image shows like a black square, and i couldn't see, what happen in this case. regards Mayolo -- Message posted via DotNetMonster.com http://www.dotnetmonster.com/Uwe/Forums.aspx/winform/200808/1 Tag: Single connection used in multi thread environment Tag: 117918
  - 21
    - Re: Resize DisplayRectangle on TableLayoutPanel row Every time you remove a control, set AutoScroll to true again. parent.AutoScroll = true; AutoScroll is a property and when you set it to true it runs a function that resizes the DisplayRectangle. Tag: Single connection used in multi thread environment Tag: 117917
  - 22
    - Custom DataGridView Column Communicate Errors Hello everyone! Here's the situation: I have a custom column where the developer supplies a min and a max value as properties to the column and I would like to communicate this back to the datagridview if the data is outside that range. I was hoping I could just throw an exception and it would automatically go into the DataError . . . but I was wrong. Is there a way to accomplish this? Not sure if code would help, I tie the cellvalidating event to the datagridview on the InitializeEditingControl of the custom class that inherits DataGridViewTextBoxCell. This works fine, except I'm having trouble communicating the error back the the grid unless I use a messagebox. Thanks for any help you can offer. Have a great afternoon! Ryan Tag: Single connection used in multi thread environment Tag: 117916
  - 23
    - What is the point of PreviewKeyDown? This seems like one of the most useless events in the Forms namespace. You'd think that it would give you the ability to examine keystrokes early on and potentially cancel them, but cancelling is the main function it lacks. Therefore, when would anyone EVER use this event as opposed to KeyDown? Tag: Single connection used in multi thread environment Tag: 117914
  - 24
    - Shutting down event Hi How can my app check if windows is being shutdown so it can do the necessary clean up and close? Thanks Regards Tag: Single connection used in multi thread environment Tag: 117910
  - 25
    - customized TreeNode class in c# Hi all, I have a treeview in which i add node from TreeNode class and set treeview.checkboxes = false. In that treeview now i want to add another node with checkbox(that node is from a customized TreeNode class) . Can anybody help me to design the customized TreeNode class. Thanks Tag: Single connection used in multi thread environment Tag: 117909

Hi all,
I am using infragistics windows controls version 2007. I have used
desktop alert control on a thread. New thread is work in background
and fetch data after every one minutes. and if any alert data is found
it generate alert window for that. I am using background worker
control for secondary thread. and alert window generation code is in
background worker's progresschanged event.
Its working fine most of the time. But some time it creating problem
i.e. some error is orroured and full of screen fill with the alert
windows. and at the last application stoped working.
I am not able to find out the root of this problem. why that so much
of screens are generating and when screen is going to close it give
index of range error.
Yes, I am using single sqlconnection for whole application.

Thanks in adavance to help me.....
i am too much worked on that....but dont find the root of problem..

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