namespace WinFormTest
{
partial class ParentForm
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (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.menuStrip1 = new System.Windows.Forms.MenuStrip();
this.windowsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.treeView1 = new System.Windows.Forms.TreeView();
this.panel1 = new System.Windows.Forms.Panel();
this.menuStrip1.SuspendLayout();
this.SuspendLayout();
// 
// menuStrip1
// 
this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.windowsToolStripMenuItem});
this.menuStrip1.Location = new System.Drawing.Point(0, 0);
this.menuStrip1.MdiWindowListItem = this.windowsToolStripMenuItem;
this.menuStrip1.Name = "menuStrip1";
this.menuStrip1.Size = new System.Drawing.Size(684, 25);
this.menuStrip1.TabIndex = 0;
this.menuStrip1.Text = "menuStrip1";
// 
// windowsToolStripMenuItem
// 
this.windowsToolStripMenuItem.Name = "windowsToolStripMenuItem";
this.windowsToolStripMenuItem.Size = new System.Drawing.Size(73, 21);
this.windowsToolStripMenuItem.Text = "Windows";
// 
// treeView1
// 
this.treeView1.Dock = System.Windows.Forms.DockStyle.Left;
this.treeView1.Location = new System.Drawing.Point(0, 25);
this.treeView1.Margin = new System.Windows.Forms.Padding(0);
this.treeView1.Name = "treeView1";
this.treeView1.Size = new System.Drawing.Size(228, 380);
this.treeView1.TabIndex = 3;
this.treeView1.NodeMouseDoubleClick += new System.Windows.Forms.TreeNodeMouseClickEventHandler(this.treeView1_NodeMouseDoubleClick);
// 
// panel1
// 
this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
| System.Windows.Forms.AnchorStyles.Left)));
this.panel1.BackColor = System.Drawing.Color.Red;
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel1.Cursor = System.Windows.Forms.Cursors.VSplit;
this.panel1.Location = new System.Drawing.Point(230, 28);
this.panel1.Margin = new System.Windows.Forms.Padding(0);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(3, 100);
this.panel1.TabIndex = 5;
// 
// Form1
// 
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(684, 405);
this.Controls.Add(this.panel1);
this.Controls.Add(this.treeView1);
this.Controls.Add(this.menuStrip1);
this.IsMdiContainer = true;
this.MainMenuStrip = this.menuStrip1;
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.Resize += new System.EventHandler(this.Form1_Resize);
this.menuStrip1.ResumeLayout(false);
this.menuStrip1.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.MenuStrip menuStrip1;
private System.Windows.Forms.ToolStripMenuItem windowsToolStripMenuItem;
private System.Windows.Forms.TreeView treeView1;
private System.Windows.Forms.Panel panel1;
}
}

private void ShowChildForm<TForm>() where TForm : Form, new()
{
Form childForm = new TForm();
childForm.MdiParent = this;
childForm.Name = "ChildForm - " + DateTime.Now.Millisecond.ToString();
childForm.Text = childForm.Name;
childForm.Show();
}

public ParentForm()
{
InitializeComponent();
panel1.MouseDown += panel1_MouseDown;
panel1.MouseUp += panel1_MouseUp;
panel1.MouseMove += panel1_MouseMove;
panel1.Top = menuStrip1.Height;
panel1.Left = treeView1.Left + treeView1.Width;
panel1.Height = panel1.Parent.Height;
}

private bool startMove = false; //用于标记是否在移动中
void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (startMove)
{
panel1.Left += e.X;
}
}
void panel1_MouseUp(object sender, MouseEventArgs e)
{
if (startMove)
{
panel1.Left += e.X;
startMove = false;
this.treeView1.Width = panel1.Left;
}
}
void panel1_MouseDown(object sender, MouseEventArgs e)
{
startMove = true;
} 

private void ParentForm_Resize(object sender, EventArgs e)
{
panel1.Height = panel1.Parent.Height;
}

private void ParentForm_Load(object sender, EventArgs e)
{
LoadMenuNodes();
}
private void LoadMenuNodes() //实现情况应该是从数据库及用户权限来进行动态创建菜单项
{
this.treeView1.Nodes.Clear();
var root = this.treeView1.Nodes.Add("Root");
for (int i = 1; i <= 10; i++)
{
var section = root.Nodes.Add("Section-" + i);
int maxNodes = new Random(i).Next(1, 10);
for (int n = 1; n <= maxNodes; n++)
{
section.Nodes.Add(string.Format("Level-{0}-{1}", i, n));
}
}
}
private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (e.Node.Nodes.Count <= 0)//当非父节点（即：实际的功能节点）
{
ShowChildForm<ChildForm>();
}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WinFormTest
{
public partial class ParentForm : Form
{
private bool startMove = false;
public ParentForm()
{
InitializeComponent();
panel1.MouseDown += panel1_MouseDown;
panel1.MouseUp += panel1_MouseUp;
panel1.MouseMove += panel1_MouseMove;
panel1.Top = menuStrip1.Height;
panel1.Left = treeView1.Left + treeView1.Width;
panel1.Height = panel1.Parent.Height;
}
void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (startMove)
{
panel1.Left += e.X;
}
}
void panel1_MouseUp(object sender, MouseEventArgs e)
{
if (startMove)
{
panel1.Left += e.X;
startMove = false;
this.treeView1.Width = panel1.Left;
}
}
void panel1_MouseDown(object sender, MouseEventArgs e)
{
startMove = true;
}
private void ParentForm_Load(object sender, EventArgs e)
{
LoadMenuNodes();
}
private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (e.Node.Nodes.Count <= 0)//当非父节点（即：实际的功能节点）
{
ShowChildForm<ChildForm>();
}
}
private void ParentForm_Resize(object sender, EventArgs e)
{
panel1.Height = panel1.Parent.Height;
}
private void LoadMenuNodes() //实现情况应该是从数据库及用户权限来进行动态创建菜单项
{
this.treeView1.Nodes.Clear();
var root = this.treeView1.Nodes.Add("Root");
for (int i = 1; i <= 10; i++)
{
var section = root.Nodes.Add("Section-" + i);
int maxNodes = new Random(i).Next(1, 10);
for (int n = 1; n <= maxNodes; n++)
{
section.Nodes.Add(string.Format("Level-{0}-{1}", i, n));
}
}
}
private void ShowChildForm<TForm>() where TForm : Form, new()
{
Form childForm = new TForm();
childForm.MdiParent = this;
childForm.Name = "ChildForm - " + DateTime.Now.Millisecond.ToString();
childForm.Text = childForm.Name;
childForm.Show();
}
}
}