Winform窗口渐进打开关闭效果实现

在Load中调用ShowFXCenter函数，在FormClosing中调用HideFXCenter函数：

private void Form_Load(object sender, EventArgs e)
{
FormShowHideFx.ShowFXCenter(this.Handle, 300);
}

private void Form_FormClosing(object sender, FormClosingEventArgs e)
{
FormShowHideFx.HideFXCenter(this.Handle, 300);
}

1 using System;
2 using System.Collections.Generic;
3 using System.Text;
4 using System.Runtime.InteropServices;
5
6 namespace Helper
7 {
8 /// <summary>
9 /// 窗口渐时显示隐藏
10 /// </summary>
11 public class FormShowHideFx
12 {
13 #region 变量
14 #region dwflag的取值
15 private const Int32 AW_HOR_POSITIVE = 0x00000001;
16 //从左到右显示
17 private const Int32 AW_HOR_NEGATIVE = 0x00000002;
18 //从右到左显示
19 private const Int32 AW_VER_POSITIVE = 0x00000004;
20 //从上到下显示
21 private const Int32 AW_VER_NEGATIVE = 0x00000008;
22 //从下到上显示
23 private const Int32 AW_CENTER = 0x00000010;
24 //若使用了AW_HIDE标志，则使窗口向内重叠，即收缩窗口；否则使窗口向外扩展，即展开窗口
25 private const Int32 AW_HIDE = 0x00010000;
26 //隐藏窗口，缺省则显示窗口
27 private const Int32 AW_ACTIVATE = 0x00020000;
28 //激活窗口。在使用了AW_HIDE标志后不能使用这个标志
29 private const Int32 AW_SLIDE = 0x00040000;
30 //使用滑动类型。缺省则为滚动动画类型。当使用AW_CENTER标志时，这个标志就被忽略
31 private const Int32 AW_BLEND = 0x00080000;
32 #endregion
33 #endregion
34
35 #region 私有方法
36 [DllImport("user32")]
37 private static extern bool AnimateWindow(IntPtr whnd, int dwtime, int dwflag);
38 #endregion
39
40 #region 公开方法
41 /// <summary>
42 /// 由中心向边界扩展渐进打开窗口
43 /// </summary>
44 public static void ShowFXCenter(IntPtr wnd, int dwtime)
45 {
46 AnimateWindow(wnd, dwtime, AW_CENTER | AW_ACTIVATE | AW_SLIDE);
47 }
48
49 /// <summary>
50 /// 由边界向中心扩展渐进关闭窗口
51 /// </summary>
52 public static void HideFXCenter(IntPtr wnd, int dwtime)
53 {
54 AnimateWindow(wnd, dwtime, AW_CENTER | AW_HIDE | AW_SLIDE);
55 }
56 #endregion
57 }
58 }
59