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c#文件操作
阅读量:5898 次
发布时间:2019-06-19

本文共 5778 字,大约阅读时间需要 19 分钟。

一.读取文本文件

ContractedBlock.gifExpandedBlockStart.gif代码
 
/**//// <summary>
/// 读取文本文件
/// </summary>
private void ReadFromTxtFile()
{
if(filePath.PostedFile.FileName != "")
{
txtFilePath
=filePath.PostedFile.FileName;
fileExtName
= txtFilePath.Substring(txtFilePath.LastIndexOf(".")+1,3);
if(fileExtName !="txt" && fileExtName != "TXT")
{
Response.Write(
"请选择文本文件");
}
else
{
StreamReader fileStream
= new StreamReader(txtFilePath,Encoding.Default);
txtContent.Text
= fileStream.ReadToEnd();
fileStream.Close();
}
}
}

 

二.获取文件列表

 

/// /// 获取文件列表/// private void GetFileList(){    string strCurDir,FileName,FileExt;        /**文件大小    long FileSize;        /**最后修改时间;    DateTime FileModify;    /**初始化    if(!IsPostBack)    {        /**初始化时,默认为当前页面所在的目录        strCurDir = Server.MapPath(".");        lblCurDir.Text = strCurDir;        txtCurDir.Text = strCurDir;    }    else    {        strCurDir = txtCurDir.Text;        txtCurDir.Text = strCurDir;        lblCurDir.Text = strCurDir;    }    FileInfo fi;    DirectoryInfo dir;    TableCell td;    TableRow tr;    tr = new TableRow();        /**动态添加单元格内容    td = new TableCell();    td.Controls.Add(new LiteralControl("文件名"));    tr.Cells.Add(td);    td = new TableCell();    td.Controls.Add(new LiteralControl("文件类型"));    tr.Cells.Add(td);    td = new TableCell();    td.Controls.Add(new LiteralControl("文件大小"));    tr.Cells.Add(td);    td = new TableCell();    td.Controls.Add(new LiteralControl("最后修改时间"));    tr.Cells.Add(td);    tableDirInfo.Rows.Add(tr);        /**针对当前目录建立目录引用对象    DirectoryInfo dirInfo = new DirectoryInfo(txtCurDir.Text);        /**循环判断当前目录下的文件和目录    foreach(FileSystemInfo fsi in dirInfo.GetFileSystemInfos())    {        FileName = "";        FileExt = "";        FileSize = 0;                /**如果是文件        if(fsi is FileInfo)        {            fi = (FileInfo)fsi;                         /**取得文件名            FileName = fi.Name;                         /**取得文件的扩展名             FileExt = fi.Extension;                        /**取得文件的大小            FileSize = fi.Length;                        /**取得文件的最后修改时间            FileModify = fi.LastWriteTime;        }        /**否则是目录        else        {            dir = (DirectoryInfo)fsi;                        /**取得目录名            FileName = dir.Name;                        /**取得目录的最后修改时间            FileModify = dir.LastWriteTime;                        /**设置文件的扩展名为"文件夹"            FileExt = "文件夹";        }                /**动态添加表格内容        tr = new TableRow();        td = new TableCell();        td.Controls.Add(new LiteralControl(FileName));        tr.Cells.Add(td);        td = new TableCell();        td.Controls.Add(new LiteralControl(FileExt));        tr.Cells.Add(td);        td = new TableCell();        td.Controls.Add(new LiteralControl(FileSize.ToString()+"字节"));        tr.Cells.Add(td);        td = new TableCell();        td.Controls.Add(new   LiteralControl(FileModify.ToString("yyyy-mm-dd hh:mm:ss")));        tr.Cells.Add(td);        tableDirInfo.Rows.Add(tr);    }} 四.写入日志文件

1expandedblockstart%5B2%5D.gifcontractedblock%5B3%5D.gif/**//// <summary>

 2inblock%5B2%5D.gif/// 写入日志文件
 3inblock%5B2%5D.gif/// </summary>
 4expandedblockend%5B2%5D.gif/// <param name="input"></param> 
 5none%5B2%5D.gifprivate void WriteLogFile(string input)
 6expandedblockstart%5B2%5D.gifcontractedblock%5B3%5D.gifdot%5B1%5D.gif{    
 7expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////指定日志文件的目录 
 8inblock%5B2%5D.gif    string fname = Server.MapPath("upedFile"+ "\\logfile.txt";
 9expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////定义文件信息对象 
10inblock%5B2%5D.gif    FileInfo finfo = new FileInfo(fname);
11inblock%5B2%5D.gif
12expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////判断文件是否存在以及是否大于2K 
13inblock%5B2%5D.gif    if ( finfo.Exists && finfo.Length > 2048 )
14expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif{
15expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////删除该文件
16inblock%5B2%5D.gif        finfo.Delete();
17expandedsubblockend%5B3%5D.gif    }
18expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////创建只写文件流
19inblock%5B2%5D.gif    using(FileStream fs = finfo.OpenWrite())
20expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif{
21expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////根据上面创建的文件流创建写数据流
22inblock%5B2%5D.gif        StreamWriter w = new StreamWriter(fs);
23inblock%5B2%5D.gif        
24expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////设置写数据流的起始位置为文件流的末尾
25inblock%5B2%5D.gif        w.BaseStream.Seek(0, SeekOrigin.End);
26inblock%5B2%5D.gif        
27expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////写入“Log Entry : ”
28inblock%5B2%5D.gif        w.Write("\nLog Entry : ");
29inblock%5B2%5D.gif        
30expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////写入当前系统时间并换行
31inblock%5B2%5D.gif        w.Write("{0} {1} \r\n", DateTime.Now.ToLongTimeString(),
32inblock%5B2%5D.gif            DateTime.Now.ToLongDateString());
33inblock%5B2%5D.gif        
34expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////写入日志内容并换行
35inblock%5B2%5D.gif        w.Write(input + "\n");
36inblock%5B2%5D.gif        
37expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////写入------------------------------------“并换行
38inblock%5B2%5D.gif        w.Write("------------------------------------\n");
39inblock%5B2%5D.gif        
40expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////清空缓冲区内容,并把缓冲区内容写入基础流
41inblock%5B2%5D.gif        w.Flush();
42inblock%5B2%5D.gif        
43expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////关闭写数据流
44inblock%5B2%5D.gif        w.Close();
45expandedsubblockend%5B3%5D.gif    }
46expandedblockend%5B2%5D.gif}

五.创建HTML文件

1expandedblockstart%5B2%5D.gifcontractedblock%5B3%5D.gif/**//// <summary>

 2inblock%5B2%5D.gif/// 创建HTML文件
 3expandedblockend%5B2%5D.gif/// </summary>
 4none%5B2%5D.gifprivate void CreateHtmlFile()
 5expandedblockstart%5B2%5D.gifcontractedblock%5B3%5D.gifdot%5B1%5D.gif{    
 6expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////定义和html标记数目一致的数组
 7inblock%5B2%5D.gif    string[] newContent = new string[5];
 8inblock%5B2%5D.gif    StringBuilder strhtml = new StringBuilder();
 9inblock%5B2%5D.gif    try 
10expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif{
11expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////创建StreamReader对象
12inblock%5B2%5D.gif        using (StreamReader sr = new StreamReader(Server.MapPath("createHTML"+ "\\template.html")) 
13expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        dot%5B1%5D.gif{
14inblock%5B2%5D.gif            String oneline;
15inblock%5B2%5D.gif            
16expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif            /**////读取指定的HTML文件模板
17inblock%5B2%5D.gif            while ((oneline = sr.ReadLine()) != null
18expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif            dot%5B1%5D.gif{
19inblock%5B2%5D.gif                strhtml.Append(oneline);
20expandedsubblockend%5B3%5D.gif            }
21inblock%5B2%5D.gif            sr.Close();
22expandedsubblockend%5B3%5D.gif        }
23expandedsubblockend%5B3%5D.gif    }
24inblock%5B2%5D.gif    catch(Exception err)
25expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif{
26expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////输出异常信息
27inblock%5B2%5D.gif        Response.Write(err.ToString());
28expandedsubblockend%5B3%5D.gif    }
29expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////为标记数组赋值
30inblock%5B2%5D.gif    newContent[0= txtTitle.Text;//标题
31inblock%5B2%5D.gif    newContent[1= "BackColor='#cccfff'";//背景色
32inblock%5B2%5D.gif    newContent[2= "#ff0000";//字体颜色
33inblock%5B2%5D.gif    newContent[3= "100px";//字体大小
34inblock%5B2%5D.gif    newContent[4= txtContent.Text;//主要内容
35inblock%5B2%5D.gif
36expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    /**////根据上面新的内容生成html文件
37inblock%5B2%5D.gif    try
38expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif{
39expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////指定要生成的HTML文件
40inblock%5B2%5D.gif        string fname = Server.MapPath("createHTML"+"\\" + DateTime.Now.ToString("yyyymmddhhmmss"+ ".html";
41inblock%5B2%5D.gif        
42expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////替换html模版文件里的标记为新的内容
43inblock%5B2%5D.gif        for(int i=0;i < 5;i++)
44expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        dot%5B1%5D.gif{
45inblock%5B2%5D.gif            strhtml.Replace("$htmlkey["+i+"]",newContent[i]);
46expandedsubblockend%5B3%5D.gif        }
47expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////创建文件信息对象
48inblock%5B2%5D.gif        FileInfo finfo = new FileInfo(fname);
49inblock%5B2%5D.gif        
50expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////以打开或者写入的形式创建文件流
51inblock%5B2%5D.gif        using(FileStream fs = finfo.OpenWrite())
52expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        dot%5B1%5D.gif{
53expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif            /**////根据上面创建的文件流创建写数据流
54inblock%5B2%5D.gif            StreamWriter sw = new StreamWriter(fs,System.Text.Encoding.GetEncoding("GB2312"));
55inblock%5B2%5D.gif            
56expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif            /**////把新的内容写到创建的HTML页面中
57inblock%5B2%5D.gif            sw.WriteLine(strhtml);
58inblock%5B2%5D.gif            sw.Flush();
59inblock%5B2%5D.gif            sw.Close();
60expandedsubblockend%5B3%5D.gif        }
61inblock%5B2%5D.gif        
62expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif        /**////设置超级链接的属性
63inblock%5B2%5D.gif        hyCreateFile.Text = DateTime.Now.ToString("yyyymmddhhmmss")+".html";
64inblock%5B2%5D.gif        hyCreateFile.NavigateUrl = "createHTML/"+DateTime.Now.ToString("yyyymmddhhmmss")+".html";
65expandedsubblockend%5B3%5D.gif    }
66inblock%5B2%5D.gif    catch(Exception err)
67expandedsubblockstart%5B1%5D.gifcontractedsubblock%5B2%5D.gif    dot%5B1%5D.gif
68inblock%5B2%5D.gif        Response.Write (err.ToString());
69expandedsubblockend%5B3%5D.gif    }
70expandedblockend%5B2%5D.gif}

《收集》

 

转载于:https://www.cnblogs.com/undefine/archive/2010/05/21/1741053.html

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