仿Office的程序載入窗體

本文轉載自查看原文 2014-01-08 17:31 1464 C#/ 控件使用

　　初次接觸啟動界面記不清是在哪一年了，估計是小學四年級第一次打開Office Word的時候吧，更記不清楚當時的啟動界面是長啥樣了。后來隨着使用的軟件越來越多，也見到各式各樣的啟動界面。下面就列舉了兩個平常本人平常最常見的窗體，其實windows系統在啟動的過程中，有Window字樣並且有動畫效果的那個節面也算是一個啟動界面。

　　其目的很明顯，就是程序啟動之后，由於加載主界面的時間過長而導致用戶體驗不佳，於是往往在顯示主界面之前多顯示一個不帶windows窗體元素的窗體，來顯示應用程序加載的進度或者直接是一個靜態的視圖，作用在於就是跟用戶反映程序是有響應的並且正在運行當中，從而提高用戶體驗。下面是我的載入窗

主要是仿照了Office 2013的風格

　　簡約明了。其中窗體的底色，字體，文字顏色可以更改，左上角的制造商，中間的軟件名稱，左下角的進度信息都可以更改。不過暫時還沒有把圖標附加到左上角而已。

窗體的設計如下所示

　　載入窗的制造商，軟件名稱這些信息通過構造函數傳參進行設置，此外默認的構造函數被屏蔽了

 1         private LoadingForm()
 2         {
 3             InitializeComponent();
 4         }
 5 
 6         public LoadingForm(string logoStr, string appNameStr, string iniMsgStr):this()
 7         {
 8             this.lbLogo.Text = logoStr;
 9             AppName = appNameStr;
10             this.lbMsg.Text = iniMsgStr;
11             this.picLoading.Width = this.Width;
12 
13             this.MouseDown+=new MouseEventHandler(LoadingForm_MouseDown);
14             foreach (Control con in this.Controls)
15             {
16                 if (con.Equals(this.btnClose)) continue;
17                 con.MouseDown += new MouseEventHandler(LoadingForm_MouseDown);
18             }
19         }

　　對窗體的打開並非用單純的Show或者ShowDialog，因為在主線程上Show的話，本身主線程要加載時就會阻塞，這樣再阻塞的線程上show的話，窗體難以顯示。如果用ShowDialog的也不行，雖然它可以讓窗體顯示出來，但是調用了ShowDialog之后直到窗體關閉了才返回。就是說載入窗關閉了之后才執行載入加載之類的操作，這樣顯得毫無意義。

　　這里只是用來了一個異步去ShowDialog。代碼如下

1         public void ShowLoading()
2         {
3             Action callback = new Action(delegate()
4             {
5                 if (!this.IsDisposed)
6                     this.ShowDialog();
7             });
8             callback.BeginInvoke(null, null);
9         }

　　這里在ShowDialog之前還多作了一個判斷，在於關閉窗體的方法時釋放了資源，因此在幾個地方都要注意，關閉窗體的處理如下

 1         public void CloseLoading()
 2         {
 3             if (!this.IsDisposed && this.IsHandleCreated)
 4             {
 5                 this.Invoke((Action)delegate
 6                 {
 7                     this.Close();
 8                     this.Dispose();
 9 
10                 });
11             }
12         }

　　由於調用了Invoke，這個需要判斷當前窗體是否已經是顯示了出來，否則就會因為窗體的句柄不存在而拋出異常。

　　在窗體上顯示的進度信息，只是通過了一個外放的屬性實現，其判斷的用意跟關閉窗體時的一樣。

 1         public string Message {
 2             get { return this.lbMsg.Text; }
 3             set 
 4             {
 5                 if (!this.IsDisposed&&this.IsHandleCreated)
 6                 {
 7                     this.Invoke((Action)delegate()
 8                     {
 9                         this.lbMsg.Text = value;
10                     });
11                 }
12             }
13         }

為了窗體能具備可拖拽的效果，還額外加了一下的代碼

 1         [DllImport("user32.dll")]
 2         private  static extern bool ReleaseCapture();
 3         [DllImport("user32.dll")]
 4         private static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
 5         private const int WM_SYSCOMMAND = 0x0112;
 6         private const int SC_MOVE = 0xF010;
 7         private const int HTCAPTION = 0x0002;
 8 
 9         protected void LoadingForm_MouseDown(object sender, MouseEventArgs e)
10         {
11 
12             ReleaseCapture();
13             SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
14         }

調用的形式如下

            LoadingForm frm = new LoadingForm("HopeGi", "猴健工具集", "啟動中...");
            frm.ShowLoading();
            //一系列操作
            frm.Message = "加載界面...";
            //一系列操作
            frm.CloseLoading();

　　最近出了點狀況，電腦很久也沒碰了，前進的步伐緩了下來。能寫出來的博客也不咋的，各位有什么好的建議和意見盡管提，謝謝！最后附上源碼,可是用到的gif圖片沒附帶上來

  1     public partial class LoadingForm : Form
  2     {
  3 
  4         [DllImport("user32.dll")]
  5         private  static extern bool ReleaseCapture();
  6         [DllImport("user32.dll")]
  7         private static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
  8         private const int WM_SYSCOMMAND = 0x0112;
  9         private const int SC_MOVE = 0xF010;
 10         private const int HTCAPTION = 0x0002;
 11 
 12         private LoadingForm()
 13         {
 14             InitializeComponent();
 15         }
 16 
 17         public LoadingForm(string logoStr, string appNameStr, string iniMsgStr):this()
 18         {
 19             this.lbLogo.Text = logoStr;
 20             AppName = appNameStr;
 21             this.lbMsg.Text = iniMsgStr;
 22             this.picLoading.Width = this.Width;
 23 
 24             this.MouseDown+=new MouseEventHandler(LoadingForm_MouseDown);
 25             foreach (Control con in this.Controls)
 26             {
 27                 if (con.Equals(this.btnClose)) continue;
 28                 con.MouseDown += new MouseEventHandler(LoadingForm_MouseDown);
 29             }
 30         }
 31 
 32         public string Message {
 33             get { return this.lbMsg.Text; }
 34             set 
 35             {
 36                 if (!this.IsDisposed&&this.IsHandleCreated)
 37                 {
 38                     this.Invoke((Action)delegate()
 39                     {
 40                         this.lbMsg.Text = value;
 41                     });
 42                 }
 43             }
 44         }
 45 
 46         public void ShowLoading()
 47         {
 48             Action callback = new Action(delegate()
 49             {
 50                 if (!this.IsDisposed)
 51                     this.ShowDialog();
 52             });
 53             callback.BeginInvoke(null, null);
 54         }
 55 
 56         public void CloseLoading()
 57         {
 58             if (!this.IsDisposed && this.IsHandleCreated)
 59             {
 60                 this.Invoke((Action)delegate
 61                 {
 62                     this.Close();
 63                     this.Dispose();
 64 
 65                 });
 66             }
 67         }
 68 
 69 
 70         private string AppName {
 71             get { return this.lbAppName.Text; }
 72             set {
 73                 this.lbAppName.Text = value;
 74                 this.lbAppName.Location = new Point((this.Width - this.lbAppName.Width) / 2, this.lbAppName.Location.Y);
 75             }
 76         }
 77 
 78         private void btnClose_Click(object sender, EventArgs e)
 79         {
 80             this.CloseLoading();
 81             Environment.Exit(1);
 82         }
 83 
 84         protected void LoadingForm_MouseDown(object sender, MouseEventArgs e)
 85         {
 86 
 87             ReleaseCapture();
 88             SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
 89         }
 90 
 91         #region Windows Form Designer generated code
 92 
 93         /// <summary>
 94         /// Required method for Designer support - do not modify
 95         /// the contents of this method with the code editor.
 96         /// </summary>
 97         private void InitializeComponent()
 98         {
 99             this.lbLogo = new System.Windows.Forms.Label();
100             this.lbAppName = new System.Windows.Forms.Label();
101             this.lbMsg = new System.Windows.Forms.Label();
102             this.btnClose = new System.Windows.Forms.PictureBox();
103             this.picLoading = new System.Windows.Forms.PictureBox();
104             ((System.ComponentModel.ISupportInitialize)(this.btnClose)).BeginInit();
105             ((System.ComponentModel.ISupportInitialize)(this.picLoading)).BeginInit();
106             this.SuspendLayout();
107             // 
108             // lbLogo
109             // 
110             this.lbLogo.AutoSize = true;
111             this.lbLogo.Font = new System.Drawing.Font("楷體", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
112             this.lbLogo.ForeColor = System.Drawing.Color.White;
113             this.lbLogo.Location = new System.Drawing.Point(13, 13);
114             this.lbLogo.Name = "lbLogo";
115             this.lbLogo.Size = new System.Drawing.Size(44, 16);
116             this.lbLogo.TabIndex = 0;
117             this.lbLogo.Text = "LOGO";
118             // 
119             // lbAppName
120             // 
121             this.lbAppName.AutoSize = true;
122             this.lbAppName.Font = new System.Drawing.Font("黑體", 26.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
123             this.lbAppName.ForeColor = System.Drawing.Color.White;
124             this.lbAppName.Location = new System.Drawing.Point(138, 88);
125             this.lbAppName.Name = "lbAppName";
126             this.lbAppName.Size = new System.Drawing.Size(148, 35);
127             this.lbAppName.TabIndex = 1;
128             this.lbAppName.Text = "AppName\r\n";
129             // 
130             // lbMsg
131             // 
132             this.lbMsg.AutoSize = true;
133             this.lbMsg.Font = new System.Drawing.Font("宋體", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
134             this.lbMsg.ForeColor = System.Drawing.Color.White;
135             this.lbMsg.Location = new System.Drawing.Point(16, 187);
136             this.lbMsg.Name = "lbMsg";
137             this.lbMsg.Size = new System.Drawing.Size(49, 14);
138             this.lbMsg.TabIndex = 3;
139             this.lbMsg.Text = "label1";
140             // 
141             // btnClose
142             // 
143             this.btnClose.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
144             this.btnClose.Cursor = System.Windows.Forms.Cursors.Hand;
145             this.btnClose.Image = global::AllTypeTest.Properties.Resources.Delete;
146             this.btnClose.Location = new System.Drawing.Point(388, 11);
147             this.btnClose.Name = "btnClose";
148             this.btnClose.Size = new System.Drawing.Size(24, 24);
149             this.btnClose.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
150             this.btnClose.TabIndex = 4;
151             this.btnClose.TabStop = false;
152             this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
153             // 
154             // picLoading
155             // 
156             this.picLoading.Image = global::AllTypeTest.Properties.Resources.download;
157             this.picLoading.Location = new System.Drawing.Point(0, 126);
158             this.picLoading.Name = "picLoading";
159             this.picLoading.Size = new System.Drawing.Size(420, 20);
160             this.picLoading.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
161             this.picLoading.TabIndex = 2;
162             this.picLoading.TabStop = false;
163             // 
164             // LoadingForm
165             // 
166             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
167             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
168             this.BackColor = System.Drawing.Color.ForestGreen;
169             this.ClientSize = new System.Drawing.Size(424, 211);
170             this.Controls.Add(this.btnClose);
171             this.Controls.Add(this.lbMsg);
172             this.Controls.Add(this.picLoading);
173             this.Controls.Add(this.lbAppName);
174             this.Controls.Add(this.lbLogo);
175             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
176             this.Name = "LoadingForm";
177             this.ShowInTaskbar = false;
178             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
179             this.Text = "LoadingForm";
180             this.TopMost = true;
181             ((System.ComponentModel.ISupportInitialize)(this.btnClose)).EndInit();
182             ((System.ComponentModel.ISupportInitialize)(this.picLoading)).EndInit();
183             this.ResumeLayout(false);
184             this.PerformLayout();
185 
186         }
187 
188         #endregion
189 
190         private System.Windows.Forms.Label lbLogo;
191         private System.Windows.Forms.Label lbAppName;
192         private System.Windows.Forms.PictureBox picLoading;
193         private System.Windows.Forms.Label lbMsg;
194         private System.Windows.Forms.PictureBox btnClose;
195         
196     }

LoadingForm

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