想让窗口从完全透明变到完全不透明以实现渐显效果，可是编译没问题，就是不能实现渐显的效果，完整代码如下：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace 渐显窗口
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Timers.Timer timer1;
private System.Windows.Forms.Label label1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.timer1 = new System.Timers.Timer();
this.label1 = new System.Windows.Forms.Label();
((System.ComponentModel.ISupportInitialize)(this.timer1)).BeginInit();
this.SuspendLayout();
//
// timer1
//
this.timer1.Enabled = true;
this.timer1.Interval = 10;
this.timer1.SynchronizingObject = this;
this.timer1.Elapsed += new System.Timers.ElapsedEventHandler(this.timer1_Elapsed);
//
// label1
//
this.label1.Location = new System.Drawing.Point(24, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(264, 104);
this.label1.TabIndex = 0;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(312, 285);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.timer1)).EndInit();
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
this.Opacity=0;
}
private void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
if(this.Opacity<1)
{
this.Opacity=this.Opacity+0.05;
}
else
{
this.timer1.Enabled=false;
}
}
}
}
