如何实现

Question

就是当运行时，窗体有缓缓出现的效果
是怎么实现的呢？

Answer 1

在Window的Load事件写，通过Timer控制Window.Opcity由0变化到1

Answer 2

改变窗体的透明度Opacity属性！！！

Answer 3

       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;        public Form1()
        {
            InitializeComponent();
            AnimateWindow(this.Handle, 300, AW_SLIDE + AW_VER_NEGATIVE);
        }
        
        [DllImportAttribute("user32.dll")]
        private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);从下往上升起~

Answer 4

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace 淡出淡入窗体
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public class Win32
        {
            public const Int32 AW_HOR_POSITIVE = 0x00000001;    // 从左到右打开窗口
            public const Int32 AW_HOR_NEGATIVE = 0x00000002;    // 从右到左打开窗口
            public const Int32 AW_VER_POSITIVE = 0x00000004;    // 从上到下打开窗口
            public const Int32 AW_VER_NEGATIVE = 0x00000008;    // 从下到上打开窗口
            public const Int32 AW_CENTER = 0x00000010;
            public const Int32 AW_HIDE = 0x00010000;        // 隐藏
           public const Int32 AW_ACTIVATE = 0x00020000;    //在窗体通过本函数打开后，默认情况下会失去焦点，除非加上本常量
            public const Int32 AW_SLIDE = 0x00040000;
            public const Int32 AW_BLEND = 0x00080000;       // 淡入淡出效果
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            public static extern bool AnimateWindow(
            IntPtr hwnd,  //  handle  to  window    
            int dwTime,  //  duration  of  animation    
            int dwFlags  //  animation  type    
            );
        }        private void Form1_Load(object sender, EventArgs e)
        {
            Win32.AnimateWindow(this.Handle, 2000, Win32.AW_BLEND);
        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            Win32.AnimateWindow(this.Handle, 2000, Win32.AW_SLIDE | Win32.AW_HIDE | Win32.AW_BLEND);
        }
    }
}这招最好别用,免得别人说C#程序运行得慢.