WinForm自定义Loading控件

    在VS2008下封装WinForm自定义Loading控件。

 

     AutoCircle.cs封装了旋转的圆形，直接在里面添加Label的话，计算圆形扇面的方法有点小复杂，所以在LoadingPanel.cs将AutoCircle和Label封装在一起。该控件中提供了当LoadingPanel状态变化时的事件public event RotateStateChangedHandler OnRotateStateChanged，当打开或关闭LoadingPanel时，可以用此事件来禁用/开启页面其他控件或做其他处理。

    LoadingPanel暴露了几个属性可以对AutoCircle进行外观的设置

  

    

 1 private delegate bool DoWorkDelegate();
 2 
 3 
 4         public Form1()
 5         {
 6             InitializeComponent();
 7 
 8             this.loadingPanel1.OnRotateStateChanged += new LoadingPanel.RotateStateChangedHandler(loadingPanel1_OnRotateStateChanged);
 9         }
10 
11         void loadingPanel1_OnRotateStateChanged()
12         {
13             this.Invoke(new Action(delegate()
14             {
15                 this.lblTip.Visible = !this.lblTip.Visible;
16                 this.btnAsync.Enabled = !this.btnAsync.Enabled;
17             }));
18         }
19 
20         private bool DoWork()
21         {
22             System.Threading.Thread.Sleep(5000);
23             return true;
24         }
25 
26         private void DoWorkCallBack(IAsyncResult ar)
27         {
28             AsyncResult result = (AsyncResult)ar;
29             DoWorkDelegate caller = (DoWorkDelegate)result.AsyncDelegate;
30             bool bResult = caller.EndInvoke(ar);
31 
32             this.loadingPanel1.Stop();
33         }
34 
35         private void btnAsync_Click(object sender, EventArgs e)
36         {
37             DoWorkDelegate doWorkDelegate = this.DoWork;
38             doWorkDelegate.BeginInvoke(new AsyncCallback(DoWorkCallBack), null);
39             this.loadingPanel1.Start();
40         }

    示例源码： 

    下载地址：http://files.cnblogs.com/lichence/CustomizedLoading.rar

    个人学习，仅供参考

转载于:https://www.cnblogs.com/lichence/archive/2011/08/16/2140684.html