最近在做一個項目,需要用到等待窗體,在DevExpress下面有SplashScreen控件可以使用,同時也有ProgressIndicator控件能用,但是如果沒有用Dev開發的話,我們就需要自定義一個等待窗體了。
首先,把截圖放上來:
實現的功能比較簡單,就是在程序處理 一些耗時比較多的代碼時,將Loading窗體展示給用戶,並在後台進行執行。
這個程序,參考了 網名為 “八哥” 的一個程序,當時我在群裡面的時候,感謝他的熱情幫助。
現將我的代碼貼出來吧,裡面用的了委托的概念。大家如果不懂的話,可以百度一下,這裡給出幾個鏈接:
http://blog.csdn.net/ggz631047367/article/details/44646233
http://www.runoob.com/csharp/csharp-delegate.html
http://blog.csdn.net/sjj2011/article/details/7835200
http://blog.csdn.net/testcs_dn/article/details/37671513
LoadingControl.cs代碼如下:
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 using System.Threading; 10 11 namespace ControlToolsLibrary 12 { 13 public partial class LoadingControl : Form 14 { 15 16 public delegate void mydelegate(); 17 public mydelegate eventMethod; 18 private static LoadingControl pLoading = new LoadingControl(); 19 delegate void SetTextCallback(string title,string caption,string description); 20 delegate void CloseFormCallback(); 21 public LoadingControl() 22 { 23 InitializeComponent(); 24 initLoadintForm(); 25 Thread t = new Thread(new ThreadStart(delegateEventMethod)); 26 t.IsBackground = true; 27 t.Start(); 28 } 29 30 private void LoadingControl_FormClosing(object sender, FormClosingEventArgs e) 31 { 32 if (!this.IsDisposed) 33 { 34 this.Dispose(true); 35 } 36 } 37 38 private void initLoadintForm() { 39 this.ControlBox = false; // 設置不出現關閉按鈕 40 this.StartPosition = FormStartPosition.CenterParent; 41 } 42 43 private void delegateEventMethod() 44 { 45 eventMethod(); 46 } 47 48 public static LoadingControl getLoading() 49 { 50 if (pLoading.IsDisposed) 51 { 52 pLoading = new LoadingControl(); 53 return pLoading; 54 } 55 else 56 { 57 return pLoading; 58 } 59 } 60 61 //這種方法演示如何在線程安全的模式下調用Windows窗體上的控件。 62 /// <summary> 63 /// 設置Loading 窗體的 標題title,標簽 caption 和描述 description 64 /// </summary> 65 /// <param name="title">窗口的標題[為空時,取默認值]</param> 66 /// <param name="caption">標簽(例如:please wait)[為空時,取默認值]</param> 67 /// <param name="description">描述(例如:正在加載資源...)[為空時,取默認值]</param> 68 public void SetCaptionAndDescription(string title,string caption, string description) 69 { 70 if (this.InvokeRequired&&LoadingControl.lbl_caption.InvokeRequired && LoadingControl.lbl_description.InvokeRequired) 71 { 72 SetTextCallback d = new SetTextCallback(SetCaptionAndDescription); 73 this.Invoke(d, new object[] { title,caption, description }); 74 } 75 else 76 { 77 if (!title.Equals("")) { 78 this.Text = title; 79 } 80 if (!caption.Equals("")) 81 { 82 LoadingControl.lbl_caption.Text = caption; 83 } 84 if (!description.Equals("")) { 85 LoadingControl.lbl_description.Text = description; 86 } 87 } 88 } 89 90 public void CloseLoadingForm() 91 { 92 if (this.InvokeRequired) 93 { 94 CloseFormCallback d = new CloseFormCallback(CloseLoadingForm); 95 this.Invoke(d, new object[] { }); 96 } 97 else 98 { 99 if (!this.IsDisposed) 100 { 101 this.Dispose(true); 102 } 103 } 104 } 105 106 public void SetExecuteMethod(mydelegate method) 107 { 108 this.eventMethod += method; 109 } 110 111 112 } 113 }View Code
Form的調用的方法如下: