Visual C#2005 文件IO 第一章第二节

//选中磁盘驱动器信息再RichBox控件和DataGridview控件中

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace TestDriveInfo
...{
    public partial class Form1 : Form
    ...{
        public partial class frmStatus : Form
        ...{
            public void Show(string Message)
            ...{
                    Application.DoEvents();
            }
        } 

        public Form1()
        ...{
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        ...{
           //显示一个状态信息框来表示目前要尝试取得计算机的磁盘信息
            frmStatus frmStatusMessage = new frmStatus();
            frmStatusMessage.Show(“处理中，请稍后.......”);
           
            StringBuilder sb = new StringBuilder();//可变字符串
            DriveInfo[] myAllDrives = DriveInfo.GetDrives();
            try
            ...{
                foreach (DriveInfo myDrive in myAllDrives)
                ...{
                    //使用IsReady属性判断磁盘设备是否就绪
                    if (myDrive.IsReady)
                    ...{
                        sb.Append("磁盘驱动器符：");
                        sb.AppendLine(myDrive.Name);
                        sb.Append("磁盘卷符：");
                        sb.AppendLine(myDrive.VolumeLabel);
                        sb.Append("磁盘类型：");
                        sb.AppendLine(myDrive.DriveType.ToString());
                        sb.Append("磁盘的大小：");
                        sb.AppendLine(myDrive.TotalSize.ToString());
                        sb.Append("磁盘剩余空间：");
                        sb.AppendLine(myDrive.TotalFreeSpace.ToString());
                        sb.Append("总剩余空间（含磁盘配额）：");
                        sb.AppendLine(myDrive.AvailableFreeSpace.ToString());
                        sb.AppendLine("---------------------------------------");
                    }
                }
            }
            catch(Exception ex)
            ...{
                MessageBox.Show(ex.Message);
            }
            frmStatusMessage.Close();
            this.richTextBox1.Text = sb.ToString();
           //显示于DataGridView控件中
            //this.dataGridView1.DataError+=new DataGridViewDataErrorEventHandler(dataGridView1_DataError);
            this.dataGridView1.DataSource = DriveInfo.GetDrives();
        }

        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        ...{

        }

        private void Form1_Load(object sender, EventArgs e)
        ...{
            DriveInfo[] myAllDriveInfo = DriveInfo.GetDrives();
            this.comboBox1.Items.AddRange(myAllDriveInfo);
        }
        //combox控件选中事件
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        ...{
            DriveInfo theDriveInfo=(DriveInfo)comboBox1.Items[comboBox1.SelectedIndex];
            if (theDriveInfo.IsReady)
            ...{
                this.propertyGrid1.SelectedObject = comboBox1.Items[comboBox1.SelectedIndex];
            }
            else
            ...{
                MessageBox.Show(theDriveInfo.Name+"磁盘尚未就绪","请注意",MessageBoxButtons.OK);
                this.propertyGrid1.SelectedObject = null;
            }
        }

    }
}