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  • Question about WinForms TrackBar control in .Net

    - by Jules
    Does anyone know the millisecond interval, used by the framework trackbar, between calling the ValueChanged event when moving the grip with a mouse? I've implemented my own trackbar and I'd like the behaviour to be consistent with what the user expects. I've had a look in reflector but it's one of those controls where most of the implementation is not viewable. ETA: Actually, thinking about it, it's not as simple as that. For small changes, the TrackBar is raising the event for every change. However, if you make a large fast change with the grip, it will not raise the event for every step. Just wondering exactly how the framework does this? Thanks

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  • Provide "Paste Link" Functionality in C# Winforms App

    - by Tim
    I would like to add Copy-Paste Link functionality to an application. The application replaces a complex Excel workbook. I would like to be able to copy tables, text, and charts from the application and use Paste Link in MS Word. For the uninitiated: With Excel, when you use Paste Link for the tables, text, charts, etc. the items update in Word when you change them in Excel. Does anyone know for sure if this is/is not possible (is it some proprietary feature of MS Word-Excel)? If not, can anyone point me to some resources that will help (either an app that does this or a tutorial/write-up). Thanks!

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  • Horizontal scroll winforms listview

    - by tempy
    Anyone know if its possible to enable horizontal scrolling ONLY in a windows forms listview (viewmode set to large icons). What I want to do is make a listview whose height is sufficient to only show one row of icons, and I don't want to have multiple rows. Just one very long row that a user would have to scroll horizontally to get to out-of-range icons. If I make the listview scrollable then it automatically makes multiple rows and puts in a vertical scrollbar, which I don't want. Thanks in advance!

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  • Test Application Guide for Winforms

    - by Jonathan
    I'm a c# developer in a medium/small company. I use to do quick test of the apps that my workmates made and they use to test my applications. We test each form based in our experience. (yes, I know this is not a very formal method) Now a new guy without experience are going to join our team. We think now is the momento to make a little list of things that all we should test in each form. Divided by categories. For example usability: Test that the taborder of each control are properly setted, or Valitacion: Test that the max lenght of each textbox match with the max lenght of a field in the DB...etc We don't one to Reinvent the Wheels, so I want to know if such kind of document already exists. Thanks

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  • Winforms Hotkey, Help?

    - by Di4g0n4leye
    namespace WebBrowser { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } int GetPixel(int x, int y) { Bitmap bmp = new Bitmap(1, 1, PixelFormat.Format32bppPArgb); Graphics grp = Graphics.FromImage(bmp); grp.CopyFromScreen(new Point(x,y), Point.Empty, new Size(1,1)); grp.Save(); return bmp.GetPixel(0, 0).ToArgb(); } void Button1Click(object sender, EventArgs e) { int x = Cursor.Position.X; int y = Cursor.Position.Y; int pixel = GetPixel(x,y); textBox1.Text = pixel.ToString(); } void MainFormLoad(object sender, EventArgs e) { webBrowser1.Navigate("http://google.com"); } } } } i want to add a hotkey that call Button1 on Press, How can that be done?

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  • C# WinForms StatusStrip - How do I reclaim the space from the "Grip"

    - by Clyde
    I've got a StatusStrip with a single ToolStripStatusLabel, Spring=true and a background color for notifications. The problem is that there's an ugly gray square on the right side of the status strip. After fiddling for a while, I realized this is the sizing grip (I had is set to SizingGrip=false, GripStyle=Hidden). Yet even with it hidden, it still hogs the space. I can't get any content on the status strip to extend all the way to the right. How would you work around this? Note I can't just set the backcolor of the StatusStrip because the Status Label changes colors and has some fading effects.

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  • Winforms application hangs when switching to another app

    - by joseluisrod
    Hi, I believe I have a potential threading issue. I have a user control that contains the following code: private void btnVerify_Click(object sender, EventArgs e) { if (!backgroundWorkerVerify.IsBusy) { backgroundWorkerVerify.RunWorkerAsync(); } } private void backgroundWorkerVerify_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e) { VerifyAppointments(); } private void backgroundWorkerVerify_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e) { MessageBox.Show("Information was Verified.", "Verify", MessageBoxButtons.OK, MessageBoxIcon.Information); CloseEvent(); } vanilla code. but the issue I have is that when the application is running and the users tabs to another application when they return to mine the application is hung, they get a blank screen and they have to kill it. This started when I put the threading code. Could I have some rogue threads out there? what is the best way to zero in a threading problem? The issue can't be recreated on my machine...I know I must be missing something on how to dispose of a backgroundworker properly. Any thoughts are appreciated, Thanks, Jose

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  • C# Winforms: How to display a loading form?

    - by Martijn
    I have a grid and when a row is double clicked a form is loaded. However a lot of data must be loaded, so I'd like to display a simple form with the text 'loading, please wait..'. And when all loading is finished, the form must disappear. This is what I have right now, but it doesn't work: Code that invokes the form with lots of data: FormWithLotData form = new FormWithLotData(); form.ShowDialog(this); Constructor of FormWithLotData: // Show load form FormIsLoading frm = new FormIsLoading(); _CloseLoadForm closeForm = new _CloseLoadForm(frm.Close); System.Threading.Thread thread = new System.Threading.Thread(frm.Show); thread.Start(); InitializeComponent(); this.Visible = false; LoadAllData(); this.Visible = true; // Close load form Invoke(closeForm); Hope you can help me out.

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  • Generating a second context menu dynamically in Winforms

    - by rsteckly
    Hi, I have a context menu with a few selections. If the user picks a particular choice, I want a list of choices in a second menu to come up. These choices would be coming from a data store and be unique to that user. I see how in designer you can add a set of choices statically that show upon the user making a selection. However, what do you do when you need that to come from data and not design it in the designer?

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  • WinForms equivalent of performSelectorOnMainThread in Objective-C

    - by jamone
    I haven't done much multithreading before and now find the need to do some background work and keep the UI responsive. I have the following code. data.ImportProgressChanged += new DataAccess.ImportDelegate(data_ImportProgressChanged); Thread importThread = new Thread( new ThreadStart(data.ImportPeopleFromFAD)); importThread.IsBackground = true; importThread.Start(); void data_ImportProgressChanged(int progress) { toolStripProgressBar.Value = progress; } //In my data object I have public void ImportPeopleFromFAD() { ImportProgressChanged(someInt); } But the UI doesn't get updated since the ImportProgressChanged() call is made on the background thread. In objective C I know you can use performSelectorOnMainThread and pass it a method to call using the main thread. What is the equivalent way of calling ImportProgressChanged() from the main thread?

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  • WPF UC in Winforms occasionally has an odd border to the left / visually corrupted

    - by Ryan ONeill
    I have a WPF user control I created that is used to show the state of tasks in my UI. I get the odd report back that the control sometimes has a nasty looking border to the left and I cannot reproduce it. The control looks like this (when working) (grey tick=not run, green=OK,red cross=fail,hourglass=running); It looks like this when the problem occurs; It may have something to do with the layering of those icons, when the state changes the others are made invisible and the relevant icon is made visible. The four icons are all stacked on top of each other. It could also be the background in theory, which I'll look at next. Problem is reported on both flat panel and CRT displays. Any guidance greatly appreciated. Update: 1) SnapsToDevicePixels does not affect the issue. 2) Grid is not used, only a canvas.

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  • WinForms: Making a set of controls scale vertically.

    - by DonaldRay
    I have a Windows Form that displays several DataGridViews in the following layout: (No access to image hosting at work, so please pardon the ASCII art...) +-----------------------------------------+ ¦+-----------++--------------------------+¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------++--------------------------+¦ +-----------------------------------------+ Unfortunately, when the user resizes the form to be taller, the form ends up looking like this: +-----------------------------------------+ ¦+-----------++--------------------------+¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ | | || | | || |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ | | || | | || |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------++--------------------------+¦ +-----------------------------------------+ Instead of this: +-----------------------------------------+ ¦+-----------++--------------------------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------+¦ ¦¦ |+-----------+¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦+-----------++--------------------------+¦ +-----------------------------------------+ To reproduce this, anchor the Top-Left DataGridView to Top-Left, the Center-Left DataGridView to Left, and the Bottom-Left DataGridView to Bottom-Left, and the big DataGridView to all 4. What can I do to get the behavior I want?

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  • winforms - gridview cell timespan edit problem

    - by Sharique
    I'm following this question for formatting timespan value in the gridview. Format TimeSpan in DataGridView column I'm diaplying only minutes value in grid as follows DataGridViewColumn idleTimeColumn = myGridView.Columns["IdleTime"]; idleTimeColumn.DefaultCellStyle.FormatProvider = new TimeSpanFormatter(); idleTimeColumn.DefaultCellStyle.Format = "m"; This cell is editable, so when I enter 5 (that mean 5 min) in the cell, then it should take it minute, but it take it as day value (ie, 5.00:00:00). I tried different values for format (mm,%m) but all these gives the same output.

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  • c# winForms toolTip forever

    - by jello
    Do you guys know how to set a toolTip that doesn't go away as long as you're hovering on the control? I tried setting the "AutoPopDelay" to 999999, but the tooltip disappears after 15 seconds. Or, do you know of another way to achieve the same effect?

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  • How come nobody wrote RadioMenuItems class for Winforms?

    - by Pavel Radzivilovsky
    Or maybe google is just not so friendly to me? What I want is this simple thing: constructor that accepts an array of menu item objects Value get/set property that would set all the Checked properties right bind to all Clicked events of the supplied items and provide One event Working DataBind facilities If you encountered such a nice thing around, please direct me. No need for manual do-it-in-your-form1.cs-class links, please. This I can do myself.

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  • Winforms: How to display a "loading" form?

    - by Martijn
    I have a grid and when a row is double clicked a form is loaded. However a lot of data must be loaded, so I'd like to display a simple form with the text 'loading, please wait..'. And when all loading is finished, the form must disappear. This is what I have right now, but it doesn't work: Code that invokes the form with lots of data: FormWithLotData form = new FormWithLotData(); form.ShowDialog(this); Constructor of FormWithLotData: // Show load form FormIsLoading frm = new FormIsLoading(); _CloseLoadForm closeForm = new _CloseLoadForm(frm.Close); System.Threading.Thread thread = new System.Threading.Thread(frm.Show); thread.Start(); InitializeComponent(); this.Visible = false; LoadAllData(); this.Visible = true; // Close load form Invoke(closeForm); Hope you can help me out. EDIT: I'd like to show an animated gif on the loading form.

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  • Unselect Databound Combobox Winforms .NET

    - by joedotnot
    The problem: combobox is databound to a DataView, first item in the dataview is DataRowView whose fields are DBNull.Value; Combo DropdownStyle = ComboBoxStyle.DropDownList Loads fine, displays fine, selects fine, problem is to Unselect via code. Setting the SelectedIndex to 0 throws an exception. (Setting to -1 is a no-no as per msdn doco that says dont set SelectedIndex=-1 if databound) So how to unselect without throwing an exception ? For now i wrapped it into a try/catch to just ignore the error! EDIT: As asked by Hubeza, i worked on sample code to post. Did a stripped down version of the original code in C# (original is in VB.NET) and could NOT reproduce it either. Converted to VB.NET and could NOT reproduce it either ! In other words, SelectedIndex = 0 does work in the stripped down version! Currently further investigating what else could be wrong with the original code. EDIT2: Case Closed. Call me a stupid fool if you like, and apologies for wasting anyone's time - The error was originating from MyComboBox_SelectedIndexChanged event, which i neglected to check ! May as well post the sample in case anyone finds useful. private void LoadComboMethod() { DataTable dtFruit = new DataTable("FruitTable"); //define columns DataColumn colID = new DataColumn(); colID.DataType = typeof(Int32); //VB.NET GetType(Int32) colID.ColumnName = "ID"; DataColumn colDesc = new DataColumn(); colDesc.DataType = typeof(String); colDesc.ColumnName = "Description"; //add columns to table dtFruit.Columns.AddRange(new DataColumn[] { colID, colDesc }); //add rows DataRow row = dtFruit.NewRow(); row[colID] = 1; row[colDesc] = "Apples"; dtFruit.Rows.Add(row); row = dtFruit.NewRow(); row[colID] = 1; row[colDesc] = "Bananas"; dtFruit.Rows.Add(row); row = dtFruit.NewRow(); row[colID] = 1; row[colDesc] = "Oranges"; dtFruit.Rows.Add(row); //add extra blank row. DataRowView drv = dtFruit.DefaultView.AddNew(); drv.EndEdit(); //Bind combo box DataView dv = new DataView(dtFruit); dv.Sort = "ID ASC"; //ensure blank item on top cboFruit.DataSource = dv; cboFruit.DisplayMember = "Description"; cboFruit.ValueMember = "ID"; } private void UnselectComboMethod() { if (cboFruit.SelectedIndex > 0) { cboFruit.SelectedIndex = 0; } else { MessageBox.Show("no fruit selected"); } }

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  • WinForms form freezes

    - by andrew
    On a form (F1) i have a button, from which if i create another form (lets call it F2) and show it there's no problem but i'd like to do something like this Some thread in my app is running a connection and listens for messages from a server. when a message arrives, my main form is registered to get an event that runs a function. From that function i'm trying to create and show the F2 type form (empty, nothing modified in it): it shows it but then it freezes my application. more exactly: public partial class Form1 : Form { public Form1() { InitializeComponent(); ConnectionManagerThread.getResponseListener().MessageReceived += Form1_OnMessageReceived; } private void Form1_OnMessageReceived(object sender, MessageEventArgs e) { Form2 f2 = new Form2(); f2.Show(); } }

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