如何在Windows窗体中将.png文件用作按钮？(在C#中 - visual studio 2013)

Question

我需要使用.png文件作为按钮.我只想向用户展示一张图片(周围没有任何额外区域).

我的问题在于设计并指定应该点击的区域.我改变了我的按钮的一些属性,但我达不到我的目的.我将FlatStyle更改为Flat或BackColor更改为Transparent,但按钮的背景周围有彩色背景.我需要完全删除背景.

我也尝试了PictureBox,但我无法再通过属性删除背景.

Answer 1

使用Button而不是a PictureBox.因为它也提供了使用键盘和标签的能力,但PictureBox事实并非如此.

将a添加Button到表单并设置以下属性:

Image = optionalPNGImage //should be 32bpp (alpha channel enabled)
BackColor = Color.Transparent;
FlatStyle = FlatStyle.Flat;
FlatAppearance.BorderSize = 0;
FlatAppearance.MouseDownBackColor = Color.Transparent;
FlatAppearance.MouseOverBackColor = Color.Transparent;
ForeColor = System.Drawing.Color.White;
Text = "Hello";

结果将是这样的:

接下来,如果要更改Button鼠标悬停或鼠标单击的图片,请创建以下事件:

//happens when your mouse enters the region of the button.
private void button1_MouseEnter(object sender, EventArgs e)
{
    button1.Image = picMouseOver;
}

//happens when your mouse leaves the region of the button.
private void button1_MouseLeave(object sender, EventArgs e)
{
    button1.Image = picRegular;
}

//happens when your mouse button is down inside the region of the button.
private void button1_MouseDown(object sender, MouseEventArgs e)
{
    button1.Image = picMouseDown;
}

//happens when your mouse button goes up after it went down.
private void button1_MouseUp(object sender, MouseEventArgs e)
{
    button1.Image = picRegular;
}