Visual Studio C# Windows 窗体……更改按钮颜色？

Question

I have a form (see screenshot):

As you can see, its a pretty basic form, with a save button. I have programmed it so that if any of the text fields get changed, the "SAVE" button changes color so that its obvious that I haven't clicked save and don't forget to. Unfortunately, simply changing the BackColor of the button to red isn't enough, because its UGLY as sin.

What can I do to change the color of the button to red, but not as ugly. As you can see, the "BackColor" doesn't change the entire button, just the inner piece. The border is still the same old fashioned transparent grey.

Answer 1

A little bit of a LinearGradientBrush can go a long way to soften the harshness of a pure red button.

button1.ForeColor = Color.White;

Bitmap bmp = new Bitmap(button1.Width, button1.Height);
using (Graphics g = Graphics.FromImage(bmp)) {
  Rectangle r = new Rectangle(0, 0, bmp.Width, bmp.Height);
  using (LinearGradientBrush br = new LinearGradientBrush(
                                      r,
                                      Color.Red,
                                      Color.DarkRed,
                                      LinearGradientMode.Vertical)) {
      g.FillRectangle(br, r);
    }
  }

then you can just assign the image to the button's BackgroundImage property:

  button1.BackgroundImage = bmp;

Result:

Note: Assigning a background image will lose the mouse hover coloring of the button.

Answer 2

另一种解决方案是向按钮添加一个图标（例如感叹号），而不是通知用户更改尚未保存。

Answer 3

There are many tutorials online on how to create nice buttons with c#. For example this one allows you to create Vista like buttons. Have a look here: http://www.codeproject.com/Articles/19318/Vista-Style-Button-in-C

For basic colors visit this SO question:

C#: Changing Button BackColor has no effect

Answer 4

You can just use one of the button's properties, "FlatStyle". By default, it is standard. But if you switch it to "Popup", your background color will be extended to the area of the button. You can compare the followings:

left-standard, right-popup

Answer 5

This won't work in WinForms, but you might want to switch over to WPF. It's much more convenient because you can configure EVERYTHING. (Even the color of a progressbar)

Edit: The OP doesn't have to entirely rewrite his application. He just needs to redo the layout of it, the code can be C&P'd over to the new WPF project, fyi

Edit²: You don't even need to use code to change the color of a WPF button, you can just define a red overlay with 30% opacity in the XAML file. It's that easy, really.