Win Form 的 Splitter 使用心得

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Win Form 的 Splitter 使用心得

    今天作个分析html代码,然后再批量下载的程序,其中用到 Splitter (分割条),编译程序后,发现分割条不起作用,拖动分割条的时候,相邻的两个 Panel 没有变换大小。为这个几乎花了一天时间,也没找到原因。包括到其他机子上测试。

    后来,再次作一个完全独立的测试项目,发现 Splitter 的使用有个算是 bug 的问题,如果你首先放两个 Panel ,然后再放一个 Splitter 。(注意这时候的次序)就会产生我上面出现的问题。这时候代码中的 InitializeComponent 函数部分代码如下:

  private void InitializeComponent()
  {
   //
   // ... 其他代码
   //
   
   this.panel1 = new System.Windows.Forms.Panel();
   this.panel2 = new System.Windows.Forms.Panel();
   this.splitter1 = new System.Windows.Forms.Splitter();
   this.panel2.SuspendLayout();
   this.SuspendLayout();
   
   //
   // ... 其他代码
   //
   
   // 
   // panel1
   // 
   this.panel1.Dock = System.Windows.Forms.DockStyle.Left;
   this.panel1.Location = new System.Drawing.Point(0, 42);
   this.panel1.Name = "panel1";
   this.panel1.Size = new System.Drawing.Size(120, 209);
   this.panel1.TabIndex = 6;
   this.panel1.Resize += new System.EventHandler(this.panel2_Resize);
   this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel2_Paint);
   // 
   // panel2
   // 
   this.panel2.Controls.Add(this.splitter1);
   this.panel2.Dock = System.Windows.Forms.DockStyle.Fill;
   this.panel2.Location = new System.Drawing.Point(120, 42);
   this.panel2.Name = "panel2";
   this.panel2.Size = new System.Drawing.Size(328, 209);
   this.panel2.TabIndex = 7;
   this.panel2.Resize += new System.EventHandler(this.panel2_Resize);
   this.panel2.Paint += new System.Windows.Forms.PaintEventHandler(this.panel2_Paint);
   // 
   // splitter1
   // 
   this.splitter1.BackColor = System.Drawing.SystemColors.Desktop;
   this.splitter1.Location = new System.Drawing.Point(0, 0);
   this.splitter1.Name = "splitter1";
   this.splitter1.Size = new System.Drawing.Size(3, 209);
   this.splitter1.TabIndex = 0;
   this.splitter1.TabStop = false;

   // 
   // Form1
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(448, 273);
   this.Controls.Add(this.panel2);
   this.Controls.Add(this.panel1);
   this.Controls.Add(this.toolBar1);
   this.Controls.Add(this.statusBar1);
   this.Name = "Form1";
   this.Text = "站点下载工具 2003年9月21日";
   this.panel2.ResumeLayout(false);
   this.ResumeLayout(false);
  }

注意:这时候的代码中的顺序。这时候,程序的执行是有问题的。分隔条会不起作用。

但是如果你把这三个控件放入顺序修改为下面的顺序就没有问题了。
1、放入一个 Panel 比如:panel1  然后设置他的 Dock 属性为:Left;
2、放入一个 Splitter 比如:splitter1  设置它的背景颜色为一个特殊的颜色,便于看执行效果;
3、放入一个 Panel 比如:panel2  然后设置他的 Dock 属性为:Fill;
4、编译执行程序,这时候就没有问题了。

这时候正确的代码应该是:( InitializeComponent 函数部分)

  private void InitializeComponent()
  {

   //
   // ... 其他代码
   //

   this.panel1 = new System.Windows.Forms.Panel();
   this.panel2 = new System.Windows.Forms.Panel();
   this.splitter1 = new System.Windows.Forms.Splitter();
   this.panel2.SuspendLayout();
   this.SuspendLayout();

   //
   // ... 其他代码
   //

   // 
   // panel1
   // 
   this.panel1.Dock = System.Windows.Forms.DockStyle.Left;
   this.panel1.Location = new System.Drawing.Point(0, 42);
   this.panel1.Name = "panel1";
   this.panel1.Size = new System.Drawing.Size(200, 209);
   this.panel1.TabIndex = 6;
   // 
   // panel2
   // 
   this.panel2.Controls.Add(this.splitter1);
   this.panel2.Dock = System.Windows.Forms.DockStyle.Fill;
   this.panel2.Location = new System.Drawing.Point(200, 42);
   this.panel2.Name = "panel2";
   this.panel2.Size = new System.Drawing.Size(248, 209);
   this.panel2.TabIndex = 7;
   // 
   // splitter1
   // 
   this.splitter1.BackColor = System.Drawing.SystemColors.Desktop;
   this.splitter1.Location = new System.Drawing.Point(0, 0);
   this.splitter1.Name = "splitter1";
   this.splitter1.Size = new System.Drawing.Size(3, 209);
   this.splitter1.TabIndex = 0;
   this.splitter1.TabStop = false;
   // 
   // Form1
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(448, 273);
   this.Controls.Add(this.panel2);
   this.Controls.Add(this.panel1);
   this.Controls.Add(this.toolBar1);
   this.Controls.Add(this.statusBar1);
   this.Menu = this.mainMenu1;
   this.Name = "Form1";
   this.Text = "站点下载工具 2003年9月21日";
   this.Load += new System.EventHandler(this.Form1_Load);
   this.panel2.ResumeLayout(false);
   this.ResumeLayout(false);

  }  

我程序的执行环境是 win2003 标准英文版  VS.net 2003 中文版

 

 

 

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