鼠标滚轮控制panel滚动条
在winform开发中，通过设置Panel的AutoScroll属性来控制滚动条是否显示，但显示滚动条的时候，鼠标的滚轮是无法控制Panel里面的滚动条的，只能控制Form的滚动条，当我们需要控制Panel的滚动条的时候，应该怎么做呢？
1、拖一个Panel到Form里面，修改Name为panel_content，并设置AutoScroll为True
2、在Form的Load事件中添加下面的代码
this.MouseWheel += FormSample_MouseWheel;
3、在Form类中添加FormSample_MouseWheel方法
View Code
1 /// <summary>
2 /// 滚动方法
3 /// </summary>
4 /// <param name="sender"></param>
5 /// <param name="e"></param>
6 void FormSample_MouseWheel(object sender, MouseEventArgs e)
7 {
8 //获取光标位置
9 Point mousePoint = new Point(e.X, e.Y);
10 //换算成相对本窗体的位置
11 mousePoint.Offset(this.Location.X, this.Location.Y);
12 //判断是否在panel内
13 if (panel_content.RectangleToScreen(panel_content.DisplayRectangle).Contains(mousePoint))
14 {
15 //滚动
16 panel_content.AutoScrollPosition = new Point(0, panel_content.VerticalScroll.Value - e.Delta);
17 }
18 }
2 /// 滚动方法
3 /// </summary>
4 /// <param name="sender"></param>
5 /// <param name="e"></param>
6 void FormSample_MouseWheel(object sender, MouseEventArgs e)
7 {
8 //获取光标位置
9 Point mousePoint = new Point(e.X, e.Y);
10 //换算成相对本窗体的位置
11 mousePoint.Offset(this.Location.X, this.Location.Y);
12 //判断是否在panel内
13 if (panel_content.RectangleToScreen(panel_content.DisplayRectangle).Contains(mousePoint))
14 {
15 //滚动
16 panel_content.AutoScrollPosition = new Point(0, panel_content.VerticalScroll.Value - e.Delta);
17 }
18 }
通过以上步骤即可用鼠标滚轮控制Panel里面的滚动条了。
作者：风雨彩虹
