使控件透明(WinForms应用程序) [英] Making a Control transparent (WinForms Application)

问题描述

嘿，

我本来是试图将背景图像添加到Richtextbox的，当时我很快发现它不能简单地实现.我一直在网上阅读，偶然发现有人说了一些有关创建新用户控件的方法，即添加一个富文本框，然后实现此代码以使其与文本框而不是标签配合使用:

Hey there,

I was originally trying to add a background image to a Richtextbox when I quickly found out it could not be simply achieved. I kept reading on online and stumbled upon someone who said something about creating a new usercontrol adding a richtextbox and then implementing this code to work with a textbox rather than a label:

public class TransparentLabel : Label {
  public TransparentLabel() {
    this.SetStyle(ControlStyles.Opaque, true);
    this.SetStyle(ControlStyles.OptimizedDoubleBuffer, false);
  }
  protected override CreateParams CreateParams {
    get {
      CreateParams parms = base.CreateParams;
      parms.ExStyle |= 0x20;  // Turn on WS_EX_TRANSPARENT
      return parms;
    }
  }
}

所以我尝试了:

So I tried:

public class UserControl1 : RichTextbox
    {
        public UserControl1()
        {
            this.SetStyle(ControlStyles.Opaque, true);
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer, false);
        }
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams parms = base.CreateParams;
                parms.ExStyle |= 0x20;
                return parms;
            }
        }
    }

但是我最终遇到以下错误，并且不确定如何解决此问题:
错误1类型"Stickies.UserControl1"的声明中缺少部分修饰符；存在这种类型的另一个局部声明

此错误在以下行:
公共类UserControl1:RichTextbox

对于我的错误的任何帮助或对其他方法的任何帮助都将非常有用.
谢谢.

But I end up with the following error and I am unsure how to fix it:
Error 1 Missing partial modifier on declaration of type ''Stickies.UserControl1''; another partial declaration of this type exists

This error is on the following line:
public class UserControl1 : RichTextbox

Any help with my error or any help on another approach would be really helpful.
Thank you.

推荐答案

从错误消息中，我认为如果您故意在项目的所有部分中将另一个类文件声明为"partial class UserControl1"，必须将UserControl1声明为"partial".

http://msdn.microsoft.com/en-us/library/wa80x488 (v = vs.80).aspx [

From the error message I would think you have another class file in your project declared as "partial class UserControl1" if this is intentional all parts of the UserControl1 must be declared as "partial".

http://msdn.microsoft.com/en-us/library/wa80x488(v=vs.80).aspx[^]

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