c#之利用API函数实现动画窗体

这里主要利用API函数Animate Window实现窗体左右，上下，扩展，淡入滑动或滚动动画效果，步骤如下：

1.新建窗体，使用2个GroupBox控件。

2.在控件1中添加2个RadioButton控件，并设置Text分别为“滚动窗体”，“滑动窗体”，并使前者Checked设置为True。

3.在空间2中添加6个按钮，Text分别为“自左向右动画”，“自右向左动画”，“自上向下动画”，“自下向上动画”，“向外扩展动画”，“淡入动画窗体”。

4.添加一新的Window窗体，设置Text为“动画窗体”。设置其“BackgroundImage”属性，导入一张要加载的图像，然后设置其“BackgroundImageLayout”属性为“Stretch”。

5.各按钮事件主要代码如下：

private void button1_Click(object sender, EventArgs e) { Form2 myf = new Form2(); if (radioButton1.Checked == true) { myf.Text = "自左向右滚动窗体动画效果"; } else { myf.Text = "自左向右滑动窗体动画效果"; } myf.Show(); } private void button4_Click(object sender, EventArgs e) { Form2 myf = new Form2(); if (radioButton1.Checked == true) { myf.Text = "自右向左滚动窗体动画效果"; } else { myf.Text = "自右向左滑动窗体动画效果"; } myf.Show(); } private void button2_Click(object sender, EventArgs e) { Form2 myf = new Form2(); if (radioButton1.Checked == true) { myf.Text = "自上向下滚动窗体动画效果"; } else { myf.Text = "自上向下滑动窗体动画效果"; } myf.Show(); } private void button5_Click(object sender, EventArgs e) { Form2 myf = new Form2(); if (radioButton1.Checked == true) { myf.Text = "自下向上滚动窗体动画效果"; } else { myf.Text = "自下向上滑动窗体动画效果"; } myf.Show(); } private void button3_Click(object sender, EventArgs e) { Form2 myf = new Form2(); myf.Text = "向外扩展窗体动画效果"; myf.Show(); } private void button6_Click(object sender, EventArgs e) { Form2 myf = new Form2(); myf.Text = "淡入窗体动画效果"; myf.Show(); } //yinyiniao's Blog

6.双击Form2窗体，进入代码视图。首先定义公用变量，具体代码如下：

  public const Int32 AW_HOR_POSITIVE = 0X00000001; public const Int32 AW_HOR_NEGATIVE = 0X00000002; public const Int32 AW_VER_POSITIVE = 0X00000004; public const Int32 AW_VER_NEGATIVE = 0X00000008; public const Int32 AW_CENTER = 0X00000010; public const Int32 AW_HIDE = 0X00010000; public const Int32 AW_ACTIVATE = 0X00020000; public const Int32 AW_SLIDE = 0X00040000; public const Int32 AW_BLEND = 0X00080000; [System.Runtime.InteropServices.DllImportAttribute("user32.dll")] private static extern bool AnimateWindow(IntPtr hwnd,int dwTime,int dwFlags);

7.下面为Form2窗体添加加载事件代码，具体如下：

private void Form2_Load(object sender, EventArgs e) { if (this.Text == "自左向右滚动窗体动画效果") { AnimateWindow(this.Handle,2000,AW_HOR_POSITIVE); } if (this.Text == "自左向右滑动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_SLIDE+AW_HOR_POSITIVE); } if (this.Text == "自右向左滚动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_HOR_NEGATIVE); } if (this.Text == "自右向左滑动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_HOR_NEGATIVE); } if (this.Text == "自上向下滚动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_VER_POSITIVE); } if (this.Text == "自上向下滑动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_VER_POSITIVE); } if (this.Text == "自下向上滚动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_VER_NEGATIVE); } if (this.Text == "自下向上滑动窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_VER_NEGATIVE); } if (this.Text == "向外扩展窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_SLIDE + AW_CENTER); } if (this.Text == "淡入窗体动画效果") { AnimateWindow(this.Handle, 2000, AW_BLEND); } }//yinyiniao's Blog