使用List泛型读取和保存文本文件代码,CSharp代码库,德仔网

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【CSharp】使用List泛型读取和保存文本文件
作者:Dezai.CN / 发布于2011/3/15/ 543
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<pre class="code"><span style="color: blue">using </span>System;
<span style="color: blue">using </span>System.Collections.Generic;
<span style="color: blue">using </span>System.Linq;
<span style="color: blue">using </span>System.Text;

<span style="color: blue">using </span>System.Management;<span style="color: green">//添加引用
</span><span style="color: blue">using </span>System.IO;

<span style="color: blue">namespace </span>ConsoleApplication1
{
    <span style="color: blue">class </span><span style="color: rgb(43,145,175)">Program
    </span>{
        <span style="color: blue">static void </span>Main(<span style="color: blue">string</span>[] args)
        {
            <span style="color: green">//测试代码: 
            </span><span style="color: rgb(43,145,175)">test </span>mgr = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">test</span>();
            mgr.WriteListToTextFile(mgr.GetUserNames(), <span style="color: rgb(163,21,21)">@"c:\test.txt"</span>); <span style="color: green">//测试生成新的Txt文件
            </span><span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>> list = mgr.ReadTextFileToList(<span style="color: rgb(163,21,21)">@"C:\test.txt"</span>);<span style="color: green">//记取字符串 
            </span><span style="color: blue">foreach </span>(<span style="color: blue">string </span>s <span style="color: blue">in </span>list) <span style="color: rgb(43,145,175)">Console</span>.WriteLine(s); <span style="color: green">//显示出来&prime; 
            </span><span style="color: rgb(43,145,175)">Console</span>.ReadKey(); <span style="color: green">//按&prime;任一键关闭Console 
         
            /*
             * 结果：</span></pre>
<pre class="code"><span style="color: green">             *  JUQI\ASPNET
                JUQI\capable
                JUQI\Guest
                JUQI\itd0300166
                JUQI\IUSR_PLSH166
                JUQI\IWAM_PLSH166
                JUQI\SUPPORT_388945a0
             * 
             * */

        </span>}
    }
        <span style="color: blue">public class </span><span style="color: rgb(43,145,175)">test
        </span>{

            <span style="color: gray">/// <summary>
            /// </span><span style="color: green">获取本机上的用户帐户</span></pre>
<pre class="code"><span style="color: green">            </span><span style="color: gray">/// </summary>
            /// <param name="domainName"></param>
            /// <returns></returns>
            </span><span style="color: blue">public  </span><span style="color: rgb(43,145,175)">List</span><<span style="color: rgb(43,145,175)">String</span>> GetUserNames()
            {
                <span style="color: rgb(43,145,175)">ManagementClass </span>mcs = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">ManagementClass</span>(<span style="color: rgb(163,21,21)">"Win32_UserAccount"</span>);
                <span style="color: rgb(43,145,175)">ManagementObjectCollection </span>moc = mcs.GetInstances();
                <span style="color: rgb(43,145,175)">List</span><<span style="color: rgb(43,145,175)">String</span>> lstNames = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>>();
                <span style="color: blue">foreach </span>(<span style="color: rgb(43,145,175)">ManagementObject </span>mo <span style="color: blue">in </span>moc)
                {
                    lstNames.Add(<span style="color: rgb(43,145,175)">Environment</span>.UserDomainName + <span style="color: rgb(163,21,21)">"\\" </span>+ mo.GetPropertyValue(<span style="color: rgb(163,21,21)">"Name"</span>).ToString());
                    <span style="color: green">//domainName = mo.GetPropertyValue("Domain").ToString();
                </span>}
                <span style="color: blue">return </span>lstNames;
            }


            <span style="color: green">//将List转换为TXT文件
            </span><span style="color: blue">public void </span>WriteListToTextFile(<span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>> list, <span style="color: blue">string </span>txtFile)
            {
                <span style="color: green">//创建一个文件流，用以写入或者创建一个StreamWriter 
                </span><span style="color: rgb(43,145,175)">FileStream </span>fs = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">FileStream</span>(txtFile, <span style="color: rgb(43,145,175)">FileMode</span>.OpenOrCreate, <span style="color: rgb(43,145,175)">FileAccess</span>.Write);
                <span style="color: rgb(43,145,175)">StreamWriter </span>sw = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">StreamWriter</span>(fs);
                sw.Flush();
                <span style="color: green">// 使用StreamWriter来往文件中写入内容 
                </span>sw.BaseStream.Seek(<span style="color: brown">0</span>, <span style="color: rgb(43,145,175)">SeekOrigin</span>.Begin);
                <span style="color: blue">for </span>(<span style="color: blue">int </span>i = <span style="color: brown">0</span>; i < list.Count; i++) sw.WriteLine(list[i]);
                <span style="color: green">//关闭此文件t 
                </span>sw.Flush();
                sw.Close();
                fs.Close();
            }


            <span style="color: green">//读取文本文件转换为List 
            </span><span style="color: blue">public </span><span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>> ReadTextFileToList(<span style="color: blue">string </span>fileName)
            {
                <span style="color: rgb(43,145,175)">FileStream </span>fs = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">FileStream</span>(fileName, <span style="color: rgb(43,145,175)">FileMode</span>.Open, <span style="color: rgb(43,145,175)">FileAccess</span>.Read);
                <span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>> list = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">List</span><<span style="color: blue">string</span>>();
                <span style="color: rgb(43,145,175)">StreamReader </span>sr = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">StreamReader</span>(fs);
                <span style="color: green">//使用StreamReader类来读取文件 
                </span>sr.BaseStream.Seek(<span style="color: brown">0</span>, <span style="color: rgb(43,145,175)">SeekOrigin</span>.Begin);
                <span style="color: green">// 从数据流中读取每一行，直到文件的最后一行
                </span><span style="color: blue">string </span>tmp = sr.ReadLine();
                <span style="color: blue">while </span>(tmp != <span style="color: blue">null</span>)
                {
                    list.Add(tmp);
                    tmp = sr.ReadLine();
                }
                <span style="color: green">//关闭此StreamReader对象 
                </span>sr.Close();
                fs.Close();
                <span style="color: blue">return </span>list;
            }
        }

    }</pre>
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