treeView控件应用-IE地址栏下拉列表清理实例

新建一个项目,在窗体上添加一个treeView控件,名称默认treeView1,checkBoxes属性设为True,添加两个按钮button1和button2,text属性分别改成"清理选中项"和"刷新",再添加一个checkBox1.

窗体代码如下:


using System;


using System.Collections.Generic;


using System.ComponentModel;


using System.Data;


using System.Drawing;


using System.Text;


using System.Windows.Forms;


using Microsoft.Win32;


using System.Diagnostics;




namespace URL_Address_Clean




...{


public partial class Form1 : Form




...{


public string[] ValueName=new string[100]; //定义一个一维数组,用来存储值的名称,因为在删除地址时要用到




public Form1()




...{


InitializeComponent();


}




private void Form1_Load(object sender, EventArgs e)




...{


GetURL();


}






/**//// <summary>


/// 从注册表中取得IE地址栏下拉列表中的地址


/// </summary>


private void GetURL()




...{


RegistryKey myKey = Registry.CurrentUser.CreateSubKey("Software/Microsoft/Internet Explorer/TypedURLs");


string[] Values = myKey.GetValueNames();


object ValueData;




treeView1.Nodes.Clear(); //每次操作之前都先清空treeView1中的所有节点


TreeNode pNode;


pNode = treeView1.Nodes.Add("IE地址栏下拉列表"); //添加根节点




for (int i = 0; i < Values.Length; i++)




...{


ValueName[i] = Values[i]; //保存值的名称,删除的时候需要


ValueData = myKey.GetValue(ValueName[i]);


pNode.Nodes.Add(ValueData.ToString()); //添加子节点


}




myKey.Close();


treeView1.ExpandAll();


}






/**//// <summary>


/// 删除选中的地址


/// </summary>


/// <param name="sender"></param>


/// <param name="e"></param>


private void button1_Click(object sender, EventArgs e)




...{


RegistryKey myKey = Registry.CurrentUser.CreateSubKey("Software/Microsoft/Internet Explorer/TypedURLs");




for (int i = 0; i < treeView1.GetNodeCount(true)-1; i++)




...{


if (treeView1.Nodes[0].Nodes[i].Checked)




...{


myKey.DeleteValue(ValueName[i],false); //ValueName[i]即是地址treeView1.Nodes[0].Nodes[i].Text在注册表中对应的值的名称


}


}




myKey.Close();


GetURL();


}






/**//// <summary>


/// 调用GetURL()函数来刷新


/// </summary>


/// <param name="sender"></param>


/// <param name="e"></param>


private void button2_Click(object sender, EventArgs e)




...{


GetURL();


}






/**//// <summary>


/// 选中根节点时,将其子节点全选中,否则全取消


/// </summary>


/// <param name="sender"></param>


/// <param name="e"></param>


private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)




...{


if (e.Node.Level==0) //如果是根节点




...{


TreeNode cNode;


if (e.Node.Checked)




...{


cNode = e.Node.FirstNode;


for (int i = 1; i <= e.Node.GetNodeCount(true); i++)




...{


cNode.Checked = true;


cNode = cNode.NextNode;


}


}


else




...{


cNode = e.Node.FirstNode;


for (int i = 1; i <= e.Node.GetNodeCount(true); i++)




...{


cNode.Checked = false;


cNode = cNode.NextNode;


}


}


}


}






/**//// <summary>


/// 节点双击的时候在IE中打开相应的地址


/// </summary>


/// <param name="sender"></param>


/// <param name="e"></param>


private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)




...{


if (e.Node.Level == 0) return; //如果是根节点,返回


if (checkBox1.Checked)




...{


ProcessStartInfo StartInfo = new ProcessStartInfo("IExplore.exe");


StartInfo.WindowStyle = ProcessWindowStyle.Maximized;


StartInfo.Arguments = e.Node.Text;


Process.Start(StartInfo);


}


}


}


}