怎么样将字符导出到.txt文件？

Question

我想将字符串用txt文件保存下来，怎么办？

Answer 1

using System.IO;class test
{
    public static void Main()
    {
        StreamWriter sw = File.CreateText("test.txt");
        sw.WriteLine("This is a test.");
        sw.Close();
    }
}

Answer 2

FileOutputStream   fs=new   FileOutputStream(@"c:\dd.txt");   
String   s="abc\r\ndef\r\nhijk";   
fs.write(s.getBytes());   
fs.close();

Answer 3

File.WriteAllText最简单了 public static void Main()
    {
        string path = @"c:\temp\MyTest.txt";        // This text is added only once to the file.
        if (!File.Exists(path))
        {
            // Create a file to write to.
            string createText = "Hello and Welcome" + Environment.NewLine;
            File.WriteAllText(path, createText);
        }        // This text is always added, making the file longer over time
        // if it is not deleted.
        string appendText = "This is extra text" + Environment.NewLine;
        File.AppendAllText(path, appendText);        // Open the file to read from.
        string readText = File.ReadAllText(path);
        Console.WriteLine(readText);
    }

Answer 4

using System.IO;StreamWriter sw = new StreamWriter("c:\xxx.txt", false);
sw.WriteLine("一行");
sw.Close();

Answer 5

                        StreamWriter sw = new StreamWriter(filepath, false, System.Text.Encoding.GetEncoding("gb2312"));                        //写内容
                        int rows_count = _dataGridView1.Rows.Count;
                        int columns_count = _dataGridView1.Columns.Count;
                        for (int j = 0; j < _dataGridView1.Rows.Count; j++)
                        {
                            string tempStr = "";
                            for (int k = 0; k < _dataGridView1.Columns.Count; k++)
                            {
                                if (k > 0)
                                {
                                    tempStr += "\t";
                                }
                                tempStr += _dataGridView1.Rows[j].Cells[k].Value == null ? "" : _dataGridView1.Rows[j].Cells[k].Value.ToString().TrimEnd();
                            }
                            sw.WriteLine(tempStr.TrimEnd(null));
                            tempStr = "";
                        }
                        sw.Close();
                        sw.Dispose();

Answer 6

using System.IO;
StreamWriter sw = new StreamWriter("c:\xxx.txt", false)
String  s="abc\r\ndef\r\nhijk";  
fs.write(s.getBytes());  
fs.close();

Answer 7

System.IO.File.AppendAllText("要导出的文件路径", "内容");

Answer 8

using System.IO;[code=C#]        public static void FTJL(string 字符串)
        {
            string path = @"C:\Documents and Settings\Administrator\桌面\文件名.txt";            if (!Directory.Exists(Path.GetDirectoryName(path)))
            {
                Directory.CreateDirectory(Path.GetDirectoryName(path));
            }            StreamWriter sw = new StreamWriter(path, true);            sw.WriteLine(字符串);            sw.Close();
        }code]

Answer 9

using System.IO;
        public static void FTJL(string 字符串) 
        { 
            string path = @"C:\Documents and Settings\Administrator\桌面\文件名.txt";             if (!Directory.Exists(Path.GetDirectoryName(path))) 
            { 
                Directory.CreateDirectory(Path.GetDirectoryName(path)); 
            }             StreamWriter sw = new StreamWriter(path, true);             sw.WriteLine(字符串);             sw.Close(); 
        }

Answer 10

private   void   AddlogFile(string   Message)   
  {   
  StreamWriter   W;   
  DirectoryInfo   DirInfo   =   new   DirectoryInfo(Server.MapPath("\\cloud_scorpion"));   
  Message   =   DateTime.Now.ToString()   +   "       "   +   Message   +   System.Environment.NewLine;   
  if   (DirInfo.Exists   ==   false)   
  {   
  Directory.CreateDirectory(Server.MapPath("\\cloud_scorpion"));   
  }   
  FileInfo   fileinfo   =   new   FileInfo(Server.MapPath("\\cloud_scorpion")+   "\\aaa.txt");   
  if   (fileinfo.Exists   ==   false)   
  {   
  W   =   File.CreateText(Server.MapPath("\\cloud_scorpion")+   "\\aaa.txt");   
  }   
  else   
  {   
  W   =   File.AppendText(Server.MapPath("\\cloud_scorpion")+   "\\aaa.txt");   
  }   
  W.WriteLine(Message);   
  W.Close();   
  }

Answer 11

Dim   conn   As   OleDb.OleDbConnection   =   New   OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data   Source=c:\db.mdb")   
                  Dim   cmd   As   OleDb.OleDbDataAdapter   =   New   OleDb.OleDbDataAdapter("select   *   from   1",   conn)   
                  Dim   dst   As   DataSet   =   New   DataSet   
                  cmd.Fill(dst)   
                  Try   
    
    
                          Response.Charset   =   "UTF-8"   
                          Response.AppendHeader("Content-Disposition",   "attachment;filename=text.txt")   
                          Response.ContentEncoding   =   System.Text.Encoding.Default   
                          Dim   tw   As   System.IO.StringWriter   =   New   System.IO.StringWriter   
                          Dim   hw   As   Web.UI.HtmlTextWriter   =   New   Web.UI.HtmlTextWriter(tw)   
                          Dim   i   As   Integer   
                          Dim   j   As   Integer   
                          For   i   =   0   To   dst.Tables(0).Rows.Count   -   1   
                                  For   j   =   0   To   dst.Tables(0).Columns.Count   -   1   
    
                                          Response.Write(dst.Tables(0).Rows(i)(dst.Tables(0).Columns(j).ColumnName).ToString)   
                                          Response.Write(vbTab)   
                                          If   j   =   dst.Tables(0).Columns.Count   -   1   Then   
                                                  Response.Write(vbCrLf)   
                                          End   If   
                                  Next   
                          Next   
            Response.End()

Answer 12

二、读文件代码片断：
using System;
using System.IO;public class TestReadFile
{
    public static void Main(String[] args)
    {
        // Read text file C:\temp\test.txt
        FileStream fs = new FileStream(@c:\temp\test.txt (这边及一下都是有双引号的), FileMode.Open, FileAccess.Read);
        StreamReader sr = new StreamReader(fs); 
       
        String line=sr.ReadLine();
        while (line!=null)
        {
            Console.WriteLine(line);
            line=sr.ReadLine();
        } 
       
        sr.Close();
        fs.Close();
    }
}
三、写文件代码：
using System;
using System.IO;public class TestWriteFile
{
    public static void Main(String[] args)
    {
        // Create a text file C:\temp\test.txt
        FileStream fs = new FileStream(@c:\temp\test.txt , FileMode.OpenOrCreate, FileAccess.Write);
        StreamWriter sw = new StreamWriter(fs);
        // Write to the file using StreamWriter class
        sw.BaseStream.Seek(0, SeekOrigin.End);
        sw.WriteLine( First Line );
        sw.WriteLine( Second Line);
        sw.Flush();
    }
}
四、拷贝文件：
using System;
using System.IO;class TestCopyFile
{
    public static void Main()
    {
        File.Copy(c:\\temp\\source.txt, C:\\temp\\dest.txt ); 
    }
}
五、移动文件：
using System;
using System.IO;class TestMoveFile
{
    public static void Main()
    {
        File.Move(c:\\temp\\abc.txt, C:\\temp\\def.txt ); 
    }
}

Answer 13

内事不决问Baidu，外事不决问Google

Answer 14

C#导出txt文件
//导成txt
Response.Clear();
            Response.Buffer = false;
            Response.ContentEncoding = System.Text.Encoding.UTF8;
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(fileName) + ".txt");
            Response.ContentType = "text/plain";
            this.EnableViewState = false;
            Response.Write(sb.ToString());
            Response.End();//导成excel
Response.Clear();
            Response.Buffer = false;
            Response.Charset = "GB2312";
            //Response.ContentEncoding = System.Text.Encoding.UTF8;
            Response.AppendHeader("Content-Disposition", "attachment;filename=aa.txt");
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            //Response.ContentType = "application/ms-excel";
            Response.ContentType = "text/plain";
            this.EnableViewState = false;
       //    System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            //System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            //this.GridView1.RenderControl(oHtmlTextWriter);
            Response.Write("sdfasdfasdfasdfasdfasdfasdfasdfadf");
            Response.End();
lei1217

Answer 15

你了解一下System.IO命名空间里面的类，很简单的

Answer 16

你了解一下System.IO命名空间里面的类，很简单的

Answer 17

        public void ExportToText()
        {
            if (string.IsNullOrEmpty(textRemindInfoBody.Text))
                return;            StringBuilder builder = new StringBuilder();
            //builder.AppendLine("提醒内容：");
            builder.AppendLine(textRemindInfoBody.Text);
            builder.AppendLine("");            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "*.txt|*.txt";
            sfd.FilterIndex = 0;
            sfd.ShowDialog();
            if (!string.IsNullOrEmpty(sfd.FileName))
            {
                try
                {
                    if (dataTran.WriteToTxetFile(sfd.FileName, builder.ToString()))
                    {
                        messgeBoxService.ShowTip("导出完成", btnExport);
                    }
                }
                catch (Exception ex)
                {
                    messgeBoxService.ShowTip("导出失败", btnExport);
                }
            }
        }        public Class DataTran 
        {
             public BOOL WriteToTxetFile(string path,string strValue)
             {
                   StreamWriter sw = new StreamWriter(path, false, System.Text.Encoding.GetEncoding("gb2312"));
                   sw.WriteLine(strValue); 
                   sw.Close(); 
                   sw.Dispose();
             }
        }