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  • Tooltip steals mouse click

    - by deerchao
    I'm writing a custom TreeView from ScrollableControl. I decided to show tooltips when the mouse hovers over nodes with text too long to display. I find that when tooltips are shown, the user is not able to click the node to select it because (I think) he's clicking the tooltip window, not my control. Is there any easy solutions? As far I can see, System.Windows.Forms.TreeView don't have this problem. Thanks!

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  • Is there such a thing as a dektop application event aggregator, similar to that used in Prism?

    - by brownj
    The event aggregator in Prism is great, and allows loosely coupled communication between modules within a composite application. Does such a thing exist that allows the same thing to happen between standalone applications running on a user's desktop? I could imagine developing a solution that uses WCF with TCP binding and running inside Windows Process Activation Service. Client applications could subscribe or publish events to this service as required and it would ensure all other listeners get notified of events as appropriate. Using TCP would enable event messages to be pushed out to clients without the need for polling, ensuring messages are delivered very quickly. I can't help but think though that such a thing would already exist... Is anyone aware of something like this, or have any advice on how it may be best implemented?

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  • Add/Edit Columns in DataBound DataGridView

    - by Dave
    I've got a datagridview that is databound from a database table. How do I: a) Edit the displayed value for a column using the values from other columns in the row? (For example, display a URL like: <a href="/url?param=columnA">columnB</a> where columnA is the value from column A and columnB is the value from columnB) b) Add an additional column using values from the other columns (similar to a.)

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  • What is the best way to embed controls in a list/grid

    - by Brad
    I have a table of about 450 rows that I would like to display in a graphical list for users to view or modify the line items. The users would be selection options from comboboxes and selecting check boxes etc. I have found a listview class that extends the basic listview to allow for embeding objects but it seems kind of slugish when I load all the rows into it. I have used a datagridview in the past for comboboxes and checkboxes, but there was a lot of time invested in getting that up and running...not a big fav of mine. I am looking for sugestions how I can do this with minimal overhead. thanks c#, vs2008, .net 2.0, system.windows.forms

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  • DataGridView: how to focus the whole row instead of a single cell?

    - by Tomas Sedovic
    I'd like to use the DataGridView control as a list with columns. Sort of like ListView in Details mode but I want to keep the DataGridView flexibility. ListView (with Details view and FullRowSelect enabled) highlights the whole line and shows the focus mark around the whole line: DataGridView (with SelectionMode = FullRowSelect) displays focus mark only around a single cell: So, does anyone know of some (ideally) easy way to make the DataGridView row selection look like the ListView one? I'm not looking for a changed behaviour of the control - I only want it to look the same. Ideally, without messing up with the methods that do the actual painting.

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  • Updating UI objects in windows forms

    - by P a u l
    Pre .net I was using MFC, ON_UPDATE_COMMAND_UI, and the CCmdUI class to update the state of my windows UI. From the older MFC/Win32 reference: Typically, menu items and toolbar buttons have more than one state. For example, a menu item is grayed (dimmed) if it is unavailable in the present context. Menu items can also be checked or unchecked. A toolbar button can also be disabled if unavailable, or it can be checked. Who updates the state of these items as program conditions change? Logically, if a menu item generates a command that is handled by, say, a document, it makes sense to have the document update the menu item. The document probably contains the information on which the update is based. If a command has multiple user-interface objects (perhaps a menu item and a toolbar button), both are routed to the same handler function. This encapsulates your user-interface update code for all of the equivalent user-interface objects in a single place. The framework provides a convenient interface for automatically updating user-interface objects. You can choose to do the updating in some other way, but the interface provided is efficient and easy to use. What is the guidance for .net Windows Forms? I am using an Application.Idle handler in the main form but am not sure this is the best way to do this. About the time I put all my UI updates in the Idle event handler my app started to show some performance problems, and I don't have the metrics to track this down yet. Not sure if it's related.

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  • Any way to create a hidden main window in C#?

    - by Bill
    I just want a c# application with a hidden main window that will process and respond to window messages. I can create a form without showing it, and can then call Application.Run() without passing in a form, but how can I hook the created form into the message loop? Is there another way to go about this? Thanks in advance for any tips!

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  • Problem with moving a winform using C#

    - by karthik
    My form doesn't have a title bar, so I am implementing the code to drag the entire form around the screen. I am using the below code to do it, which works fine. I have two panels in my form, PanelA and PanelB. During the startup I show PanelA where the dragging works perfectly. Later when the user clicks the button in PanelA, I need to make PanelA invisible and show PanelB However, the dragging does not work when PanelB is shown. What's the problem here? private void SerialPortScanner_MouseUp(object sender, MouseEventArgs e) { this.drag = false; } private void SerialPortScanner_MouseDown(object sender, MouseEventArgs e) { this.drag = true; this.start_point = new Point(e.X, e.Y); } private void SerialPortScanner_MouseMove(object sender, MouseEventArgs e) { if (this.drag) { Point p1 = new Point(e.X, e.Y); Point p2 = this.PointToScreen(p1); Point p3 = new Point(p2.X - this.start_point.X, p2.Y - this.start_point.Y); this.Location = p3; } }

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  • Two List Boxes side by side and stretchable

    - by Ilya Biryukov
    I have two list boxes like show below, side by side. They both have anchors on top, bottom, left and right. When I stretch the window the left listbox grows over the right one. While I want the margin between them to stay and for both listboxes to expand evenly. Is there anyway to achieve this? Thanks!

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  • Bring another processes Window to foreground when it has ShowInTaskbar = false

    - by Mongus Pong
    We only want one instance of our app running at any one time. So on start up it looks to see if the app is running and if it is, it calls SetForegroundWindow on the Main Window. This is all good and well ... for the most part.. When our app starts up it will show a Splash screen and a Logon form. Both of these forms have ShowInTaskBar = false. Because of this, if you try to start up another copy of the app when the Logon form is showing, that Logon form is not brought to the front! Especially as the user cant see anything in the taskbar as well, all they figure is that the app is duff and cannot start. There is no indication that there is another instance running. Is there any way around this problem?

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  • doublebuffering not reducing the flicker

    - by fishhead
    I am drawing an grid-work of objects in a Panel. when I scroll the the panel quickly I get a flicker. I thought that enabling the double buffering may take care of this but what I find is that it does not completely draw everything and I am left with blank sections. could anyone give me suggestions as to what may be happening and how I might correct it. UPDATE: I found that I was creating the graphics object with Creategraphics() rather than using the Parameter in the paint method

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  • OnPaint event during a callback when the form is below?

    - by Martín Marconcini
    Imagine the following scenario: this.SetStyle(ControlStyles.UserPaint, true); //this doesn’t change anything … void OpenSomeForm() { SomeForm sf = new SomeForm(); sf.SomeEvent += new … (SomeEventOcurred); sf.ShowDialog(); } private void SomeEventOcurred(…) { OnePanelInThisForm.Invalidate(); } private void OnePanelInThisForm_Paint(object sender, PaintEventArgs e) { DoSomeDrawing(e.Graphics); } Now, OnePanelInThisForm draws correctly when the form loads. But if SomeEventOcurred is Fired from “SomeForm”, the paint event is not fired. If I close and reopen the form it correctly repaints. If I add a button to the form that executes: OnePanelInThisForm.Invalidate(); the panel is correctly repaint. What am I missing?

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  • Creating Settings form using TreeView in C#

    - by Kiran Chandrashekhar
    I am developing the settings form for the software developed in C#. I was looking at how different software have implemented their settings form. In most of the cases that I came across, they seem to be using Treeview on the left pane of the form and configuration settings on the right pane. Ref URL : http://2.bp.blogspot.com/-nMfQoLurxwM/UDXfiZKd4DI/AAAAAAAAAME/IRf6kmxay4w/s1600/bild1.jpg I was wondering, how the different controls are designed/displayed on the right pane. Do they hide all the controls depending which node is selected in the TreeView something like this : if (treeView1.SelectedNode == treeView1.Nodes[0]) { this.groupBox1.Visible = true; this.button1.Visible = true; this.textBox1.Visible = true; this.textBox2.Visible = true; this.label1.Visible = true; this.label2.Visible = true; this.label3.Visible = true; } else { this.groupBox1.Visible = false; this.button1.Visible = false; this.textBox1.Visible = false; this.textBox2.Visible = false; this.label1.Visible = false; this.label2.Visible = false; this.label3.Visible = false; this.groupBox2.Visible = true; this.button2.Visible = true; this.textBox3.Visible = true; this.textBox3.Visible = true; this.labe4.Visible = true; this.label5.Visible = true; this.label6.Visible = true; // bool success = selectColor(); } Is my understanding correct ? Or do we have a better design approach for creating a settings form. Thanks

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  • In forms application, is there any Alternative to MsgBox?

    - by GuruC
    I like how MsgBox stops all further processing until it's clicked but I don't like how it pops that little msgbox in the middle of the screen, which I then have bring to the front if there is a window covering it. Is there a way to do something like a msgbox but keep it on my Form (which is always in view) so I can go ahead and click a button on the form instead of having to bring the little msgbox window on top of windows that may be covering it. I use the msgbox to inform me that a certain situation has happened, which I manually fix and when I'm done I click the MsgBox to continue processing. It'd be nice to have this button right on the form.

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  • Setting SqlParameter value automatically with DataGridView?

    - by johansson
    Is there a way to set a SqlParameter's value with DataGridView, if data-bound? For example: SqlCommand selCmd = CreateCommand("SELECT * FROM table1"); SqlCommand updCmd = CreateCommand("UPDATE table1 Set column1 = @column1 WHERE id = @id"); updCmd.Parameters.Add(new SqlParameter("column1"), SqlDbTypes.Int)); updCmd.Parameters.Add(new SqlParameter("id", SqlDbTypes.Int)); SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand = selCmd; da.UpdateCommand = updCmd; da.Fill(_dataTable); dgv.DataSource = _dataTable; Then somewhere later: da.Update(); How can I make sure it's getting the right column1 value that was edited and the right id for the row for the da.Update(); to work, otherwise it complains that I have not provided the value. Or if there's a better way, please advise. Thanks!

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  • How do I access a file share programattically

    - by Mykroft
    I have a windows forms app running on a machine that is not on a domain, that needs to be able to move a file from the local filesystem to a UNC path. I have a username and password for that path. I was wondering is there any way to do this directly with out execing the net.exe command? Ideally I wouldn't have to map a drive.

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  • How to bring a form in the top of desktop?

    - by Kovu
    hi, I will let popup a form in C#.net 2.0 and it should be so long in front of the desktop until the user clicks the close button. How to do? I tried the code from here: http://dotnet-snippets.de/dns/fenster-wirklich-in-den-vordergrund-des-desktops-bringen-SID1005.aspx But it didn't work. My system is Win7.

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  • How do I put a listing of files into a menu?

    - by PandaNL
    I have a folder with .txt files in it. How can i make my menuitem get those .txt files and put the filenames in the menuitem, so that it creates a list of all .txt files in that folder. So when i put a .txt in the folder the program automatically creates the menu item. Does someone knows how to do this, or perhaps an example?

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  • winUserControl in VS2010 - properties are not visible in designer

    - by mj82
    I have a problem with (I suppose) my Visual Studio 2010 Express environment: when I design my own UserControl, in Properties grid I can't see public properties of that control. They are however visible in the project, that reference this control. As it's Express Edition, I create new empty project, then add new UserControl to it. Then, for a test, I put following code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; namespace Project1 { public partial class UserControl1 : UserControl { private int myNumber; [Browsable(true)] public int MyNumber { get { return myNumber; } set { myNumber = value; } } public UserControl1() { InitializeComponent(); } } } In VS 2008, as I remember, that should be enogh to show MyNumber property in Properties grid, even without [Browsable(true)] attribute. In VS 2010 however, when I double click UserControl1.cs in Solution Explorer and look in Properties, I don't see MyNumber. When I reference and use this control in another project, there is an access to it's properties. I've tried to competly reinstall VS 2010 environment, including SP1, but with no success. Do you have any idea what can be wrong? By the way: none of these attributes are working, either: [Browsable(true)] [EditorBrowsable(EditorBrowsableState.Always)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] [Bindable(true)] Best regards, Marcin

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  • Catching exception in Main() method

    - by Corvin
    Consider the following simple application: a windows form created by a "new C# windows application" sequence in VS that was modified in a following way: public static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); try { Application.Run(new Form1()); } catch (Exception ex) { MessageBox.Show("An unexpected exception was caught."); } } Form1.cs contains the following modifications: private void Form1_Load(object sender, EventArgs e) { throw new Exception("Error"); } If I press F5 in IDE, then, as I expect, I see a message box saying that exception was caught and the application quits. If I go to Debug(or Release)/bin and launch the executable, I see the standard "Unhandled exception" window, meaning that my exception handler doesn't work. Obviously, that has something to do with exception being thrown from a different thread that Application.Run is called from. But the question remains - why the behavior differs depending on whether the application has been run from IDE or from command line? What is the best practice to ensure that no exceptions remain unhandled in the application?

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