Win Form 的 Splitter 使用心得与技巧

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：复制代码 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）复制代码 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(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);}