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   源码介绍

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使用c#语言的winform程序，和devexpress控件，实现的管理C盘下的hosts文件，方便域名解析。

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;
using DevExpress.XtraEditors;
using System.IO;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;
using System.Diagnostics;
using System.IO;
using System.Management;
using System.Runtime.InteropServices;
using System.Threading;
using System.Security.AccessControl;

namespace hosts
{
    public partial class Form1 : Form
    {
        public string textFileName;
        public static DataTable dt=new DataTable();
        
        public Form1()
        {
            InitializeComponent();
            dt.Columns.Add("IP", Type.GetType("System.String"));
            dt.Columns.Add("DNS", Type.GetType("System.String"));
            AddSecurityControll2File(@"C:\WINDOWS\system32\drivers\etc\hosts");
        }

        /// <summary>
        /// 为文件添加users，everyone用户组的完全控制权限
        /// </summary>
        /// <param name="filePath"></param>
        private void AddSecurityControll2File(string filePath)
        {

            //获取文件信息
            FileInfo fileInfo = new FileInfo(filePath);
            //获得该文件的访问权限
            System.Security.AccessControl.FileSecurity fileSecurity = fileInfo.GetAccessControl();
            //添加ereryone用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule("Everyone", FileSystemRights.FullControl, AccessControlType.Allow));
            //添加Users用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule("Users", FileSystemRights.FullControl, AccessControlType.Allow));
            //设置访问权限
            fileInfo.SetAccessControl(fileSecurity);
        }

        public void freshData()
        {
            ReadLineAddress();
            gridControl1.DataSource = dt;

            //string filename = @"C:\WINDOWS\system32\drivers\etc\hosts";
            //string[] allLine = File.ReadAllLines(filename);
            ////这里添加处理代码
            //File.SetAttributes(filename, File.GetAttributes(filename) & (~FileAttributes.ReadOnly));//取消只读
            //File.WriteAllLines(filename, allLine);
            //File.SetAttributes(filename, File.GetAttributes(filename) | FileAttributes.ReadOnly);//设置只读

        }



        /// <summary>
        /// 从文本文件读取包含特定字串所在行第一个空格之前的文本(返回找到的第一个)
        /// </summary>
        /// <param name="include">包含特定字串的字串</param>
        /// <returns>包含特定字串的字串第一个空格之前的文本</returns>
        public void ReadLineAddress()
        {
            dt.Clear();
            textFileName = @"C:\WINDOWS\system32\drivers\etc\hosts";
            TextReader tr = new StreamReader(textFileName);
            string findstr = "";
            string retHost = "";

            int i = 0;
            while (tr.Peek() > 0)
            {
                i  ;

                findstr = tr.ReadToEnd();

                string[] str = findstr.Split(new char[] {'\n'}, StringSplitOptions.RemoveEmptyEntries);  
                for (int j = 0; j<str.Length;j   )
                {

                    string[] str1 = str[j].Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries); 
                    dt.Rows.Add((new object[]{str1[0],str1[1]}));
                    
                }

             //   retHost = str1[1];
            }
            tr.Close();
            //string[] texts = findstr.Split(' ');
            //return texts[0];
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void barButtonItem2_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            try
            {
                if (gridView1.GetFocusedRowCellValue("IP") != null || gridView1.GetFocusedRowCellValue("DNS") != null)
                {
                    DialogResult result = XtraMessageBox.Show("该信息在删除后将无法恢复，是否确定删除？", "系统提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                    if (result == DialogResult.Yes)
                    {
                        dt.Rows.RemoveAt(this.gridView1.FocusedRowHandle);
                        StreamWriter sw = new StreamWriter("C:\\WINDOWS\\system32\\drivers\\etc\\hosts");
                        string w = "";
                        sw.Write(w);
                        sw.Write(dataTableToTXT());
                        sw.Close();
                    }
                }
                else
                {
                    XtraMessageBox.Show("已选行不能为空，请更换选中行后重试。", "系统警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            catch (Exception ex)
            {
                XtraMessageBox.Show(ex.Message);
            }
        }

        /// <summary>
        /// 修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void barButtonItem3_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            try
            {
                if (gridView1.GetFocusedRowCellValue("IP") != null || gridView1.GetFocusedRowCellValue("DNS") != null)
                {
                    edit f = new edit(gridView1.FocusedRowHandle,this,"Edit");
                    f.ShowDialog();
                }
                else
                {
                    XtraMessageBox.Show("已选行不能为空，请更换选中行后重试。", "系统警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            freshData();
        }

        private void barButtonItem1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            freshData();
        }

        public string dataTableToTXT()
        {
            string s = "";
            for (int i=0; i<dt.Rows.Count;i   )
            {
                s  = dt.Rows[i]["IP"].ToString()   "\t"   dt.Rows[i]["DNS"].ToString() "\n";
            }
            return s;
        }

        /// <summary>
        /// 新增
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void barButtonItem4_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            try
            {
                edit f = new edit(gridView1.FocusedRowHandle, this, "Add");
                f.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        /// <summary>
        /// 全部删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void barButtonItem5_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            try
            {
                DialogResult result = XtraMessageBox.Show("该信息在删除后将无法恢复，是否确定删除？", "系统提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (result == DialogResult.Yes)
                {
                    dt.Clear();
                    StreamWriter sw = new StreamWriter("C:\\WINDOWS\\system32\\drivers\\etc\\hosts");
                    string w = "";
                    sw.Write(w);
                    sw.Write(dataTableToTXT());
                    sw.Close();
                }
            }
            catch (Exception ex)
            {
                XtraMessageBox.Show(ex.Message);
            }
        }
    }
}