请帮我写一份winform的自定义进度条控件
时间: 2023-05-14 09:05:34 浏览: 127
好的,以下是一份WinForm的自定义进度条控件的代码:
```csharp
using System.Drawing;
using System.Windows.Forms;
public class CustomProgressBar : Control
{
private int _minimum = 0;
private int _maximum = 100;
private int _value = 0;
public CustomProgressBar()
{
SetStyle(ControlStyles.UserPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
}
public int Minimum
{
get { return _minimum; }
set
{
_minimum = value;
Invalidate();
}
}
public int Maximum
{
get { return _maximum; }
set
{
_maximum = value;
Invalidate();
}
}
public int Value
{
get { return _value; }
set
{
_value = value;
Invalidate();
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
// 绘制背景
e.Graphics.Clear(Color.WhiteSmoke);
// 计算进度条的宽度
int width = (int)((double)(_value - _minimum) / (_maximum - _minimum) * Width);
// 绘制进度条
e.Graphics.FillRectangle(Brushes.Blue, 0, 0, width, Height);
}
}
```
这个控件继承自Control类,重写了OnPaint方法,在OnPaint方法中绘制了自定义的进度条。控件有三个属性:Minimum、Maximum和Value,分别表示进度条的最小值、最大值和当前值。在设置这些属性的值时,控件会自动重绘。
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