winforms

How can I hook multiple windows in C#?

Hi, I am trying to create an application that makes a window (external to the app) transparent when it loses focus. Most of things (getting window id, seting transparent, etc.) would be easy, except one thing - how do I hook windows? ...

Form-only opacity

Hello, First I'm going to show you an image of what I'm trying to recreate in pure NET. Image I recreated the window "Inventory" ,the only thing left is the blue-opacity window ,which shows information. If I use the opacity property then everything on that form has opacity,but on the picture the text doesn't have opacity. How do I m...

How do you automatically resize columns in a DataGridView control AND allow the user to resize the columns on that same grid

I am populating a DataGridView control on a Windows Form (C# 2.0 not WPF). My goal is to display a grid that neatly fills all available width with cells - i.e. no unused (dark grey) areas down the right and sizes each column appropriately according to the data it contains, but also allows the user to resize any of the columns to their l...

Disable Treeview Nodes

How to disable the treeview nodes in windows forms c#.net ...

How can I programmatically make certain parts of a label, in a windows form, bold?

The windows form that I designed has 1 label. The text of this label changes dynamically depending on what data the user selects. Currently i'm creating a string and assigning it to the label's text property. I need a way to make certain parts of the string that I am creating bold. How can I accomplish this in c#? ...

How to make a DateTimePicker increment/decrement on mouse wheel

When you add a DateTimePicker control, you can select part of the control value (for example the month) and then use the up/down arrows to modify this part of the date/time value (for example, incrementing/decrementing the month). What i would like to do is to allow the same thing with the mouse wheel. I tried to register on the event M...

c# winforms evenly distribute 3 controls

hello, i have 3 custom controls, that i want to place in a resizable window next to each other. when the window is being resized, these controls should also resize, each taking 33% of the available width. i tried to use a table layout, but it seems the table only grows, but never shrinks. thanks for any help on this! ...

DataBinding to ComboBox in VB.Net

I'm trying to bind CheckedListbox's Cheched items to Combobox my code is given below Private Sub chklColumns_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chklColumns.SelectedIndexChanged cmbSort.DataSource = chklColumns.CheckedItems End Sub whenever I check an item first ...

How can I prevent focus change when ShowDialog exits?

I'm trying to implement an alt-tab like behaviour for our application. When the user presses ctrl-tab, a form pops up (using ShowDialog); when they press it again, it focuses the next control in the app's main form. When they release ctrl, the form is hidden. Unfortunately, when that happens, focus is sent to a different control to th...

Visualize B-Spline in .NET

I might need to visualize a B-Spline ( http://en.wikipedia.org/wiki/B-spline ) in .NET. I do not where to start. Is there any easy way or library to do it? I would prefer to do it in Silverlight but WPF and Win Forms is also fine. I imagine the software as a coordinate system with some control points that you can add, delete or move arou...

DataGridView capturing user row selection

Hi, I am having trouble handling the selections in DataGridView. My grid view contains an amount column. There is a textbox on the form which should display the total amount of the selected grid view rows. Hence I need to capture events when the user selects/ deselects the gridview rows and calculate (add/ subtract) the amount according...

Winforms: Screen Location of Caret Position

How can I find the screen position of the caret for a standard Winforms TextBox? ...

Dropdownlist with datasource set and empty value?

Is there a quick way to add a blank value to a drop down list for a winforms application? Some of my dropdowns are bound to lists of objects and some are bound to datarows from a datatable. Since I am setting the datasource property, I can't just add one through code. Is there any quick way of getting a blank value added or will I hav...

Windows Forms: Change application mainwindow at runtime

Normally I would do Application.Run(myMainForm). But I want to do something like this: MyForm1 f = new MyForm1(); f.Close+=OnOpenOverviewWin(); Application.Run(f); void OnOpenOverviewWin() { MyOverViewForm f = new MyOverViewForm (); Application.Run(f); // i want to do this Application.NewMainWindow = f; // or something like that } ...

BackgroundWorker and Timer, handling one item at a time

My app monitors a directory where users can upload a file. When a new file is detected it is added to a queue. I have a timer that runs through the queue and determines if the file has finished uploading. If there are any files that are complete it will take the most recent and begin running a background task (using BackgroundWorker). M...

Is there a way to make DataGridViewCheckBox Cells smaller?

As described in this question it appears the minimum row height for a row in a DataGridView (WinForm not WPF) is 17 if you wish to display check boxes in a DataGridViewCheckBoxCell. Any smaller and the check box simply disappears! Is there a way to place a smaller checkbox in a DataGridView cell? ...

How can I replace an existing image on a winforms ImageList?

How can I replace an existing image on a winforms ImageList? I tried this: this.CoolPics.Images [ 2 ] = // new image this.ListViewControl.SmallImageList = this.CoolPics; However the new image is not rescaled the way the others are, when I used the this.CoolPics.Images.Add method. What am I doing wrong? ...

Calculator keypress

i made a basic calculator. but i don't know how to assign keypress. how it assigned? ...

What is the Neutral Language setting used for?

You can find the setting accessing: WinForms Application Properties->Application->Assembly Information->Neutral Language ...

Recommended .Net soft real-time

I'm interested in getting comprehensive information about soft (hard too) real-time application in .Net 3.5/4 Winforms mainly (WPF perhaps). Google results for the thing are quite poor - some quides on parallelism only ... the question is how could I for example write a real-time patient-health monitoring client for some medical applianc...