怎么样用编程方式打开特定应用程序文件？

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace PlayProcess
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
/// <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
//
InitializeComponent();

//
// 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.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(16, 16);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "打开一个文件";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(16, 48);
this.button2.Name = "button2";
this.button2.TabIndex = 1;
this.button2.Text = "浏览一个网页";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(160, 78);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
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 button1_Click(object sender, System.EventArgs e)
{
//用相应的应用程序打开文件
try
{
string strFile = @"E:/aaa.odt";

System.Diagnostics.ProcessStartInfo pInfo = new System.Diagnostics.ProcessStartInfo();

pInfo.FileName = strFile;//指定要启动的文件名
pInfo.UseShellExecute = true;//采用操作系统外壳程序启动程序

System.Diagnostics.Process p = System.Diagnostics.Process.Start(pInfo);//启动进程
}
catch(System.Exception exp)
{
MessageBox.Show(exp.Message + "/n所以无法打开该文件。");
}
}

private void button2_Click(object sender, System.EventArgs e)
{
//使用默认浏览器浏览指定网页
string target = "http://blog.csdn.net/newgrammer";
try
{
System.Diagnostics.Process.Start(target);
}
catch(System.ComponentModel.Win32Exception exp)
{
MessageBox.Show(exp.Message);
}
}
}
}

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