The main difference between User Control, Custom Control and Component is that they inherit from different levels in the inheritance tree: MyComponent |-> Component MyCustomControl |-> Control |-> Component MyUserControl |-> ContainerControl |-> ScrollableControl |-> Control |-> Component So, in short you get a different amount of pre-wired functionality with the different options. When would … Read more
I was kind of curious about how to achieve this, so I gave it a try. This is what I came up with. The approach used is pretty the same as that suggested by James in his comment: I would start with a Pane, . . ., TextFields to represent text while being edited. Register … Read more
Spring helps in the creation of loosely coupled applications because of Dependency Injection. In Spring, objects define their associations (dependencies) and do not worry about how they will get those dependencies. It is the responsibility of Spring to provide the required dependencies for creating objects. For example: Suppose we have an object Employee and it … Read more
I usually combine PointToScreen and PointToClient: Point locationOnForm = control.FindForm().PointToClient( control.Parent.PointToScreen(control.Location));
The problem is that the parent elements are providing TextBox with as much space as it thinks it needs, and when more text is present it will expand instead of staying at the initial automatic size. One solution here is to make another auto-sized element and bind the TextBox.Width to it: <DockPanel> <TreeView Width=”150″ DockPanel.Dock=”Left”/> … Read more
You should create Begin and End extension methods as well. And if you use generics, you can make the call look a little nicer. public static class ControlExtensions { public static void InvokeEx<T>(this T @this, Action<T> action) where T : Control { if (@this.InvokeRequired) { @this.Invoke(action, new object[] { @this }); } else { if … Read more
@WhozCraig well stated shortcomings to this advice. Its comes without rational nor detail. Further it does not apply to “%s” as “%s” consumes leading white-space with or without a leading space. A leading white-space, be it ‘ ‘, ‘\t’, ‘\n’, etc. all do the same thing: direct scanf() to consume and not store optional leading … Read more
There is [eternal] confusion surrounding the two types of controls available to Excel — exacerbated by the contrasting terminology used by different online sources. This is only a general overview of the differences between Form Controls and ActiveX Controls (based on my old notes that helped me finally figure out the differences!) Visit the included … Read more
There’s a silly bug in the AutoWordSelection property implementation. The workaround is equally silly. Add a new class to your project and paste the code shown below. Compile. Drop the new control from the top of the toolbox onto your form, replacing the existing RTB. using System; using System.Windows.Forms; public class FixedRichTextBox : RichTextBox { … Read more
Just declare one event handler and point each button at it: private void Common_MouseHover(object sender, EventArgs e) { Button btn = sender as Button; if (btn != null) btn.Image = pic } Then in code or designer: button1.MouseHover += Common_MouseHover; button2.MouseHover += Common_MouseHover; // .. etc