字符串和二进制数组转换、将HTML文件显示为页面的一部分、UTF8和GB2312之间的转换

1.字符串转二进制数组
string content="这是做个测试!";

System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();
byte[] byteArr = converter.GetBytes(content);

2.二进制数组转为字符串

System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();
string     spcontent = converter.GetString(byteArr );   

 


在编程中会遇到将文件以二进制数据保存到数据库的情况,以将"C:\test.html"文件保存到数据库和读取出来为例:

 

1.将文件以流的形式保存到数据库中:

                  int itag=0;

      string content = "";

      StringBuilder sb = new StringBuilder();

        string fileName = @"c:\test.html";
                    StreamReader objReader = new StreamReader(fileName, System.Text.Encoding.GetEncoding("gb2312"));
                    string sLine = "";                   
                    while (sLine != null)
                      {
                          sLine = objReader.ReadLine();
                          if (sLine != null)
                          {//这里可以做相应的处理,如过滤文件中的数据
                               sb.Append(sLine);

                         }
                       }

                 objReader.Close();

                content= sb.ToString();                                //如果你要将整个文件的内容显示在界面上,你可以用<%=content%>放到相应的地方

      System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();
      byte[] byteArr = converter.GetBytes(content);

//下面为插入到数据库代码,

strInsertCmd = "insert into  Document (DocumentID,DocumentContent,addtime,MODITIME,status) values ('" + DocumentID + "',?,'" + NOWTIME + "','" + NOWTIME + "',' 00 ')";
               cmd=new OleDbCommand(strInsertCm,ConnectionOBJ); 
               param = new OleDbParameter("DocumentContent", OleDbType.VarBinary, byteArr.Length, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, byteArr);
               cmd.Parameters.Add(param);
                itag=cmd.ExecuteNonQuery();  

          if(itag>0){//成功!} 

 

 2.从数据库中读取保存为文件或者字符串和步骤1是一个相反的过程

 


1.将GB2312数据转换为UTF-8数据如下(其他的编码类推):
public string GB2312ToUTF8(string sSourse) {           
            string Utf8_info = string.Empty;
            Encoding utf8 = Encoding.UTF8;
            Encoding gb2312 = Encoding.GetEncoding("gb2312");
            byte[] unicodeBytes = gb2312.GetBytes(sSourse);
            byte[] asciiBytes = Encoding.Convert(gb2312, utf8, unicodeBytes);
            char[] asciiChars = new char[utf8.GetCharCount(asciiBytes, 0, asciiBytes.Length)];
            utf8.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);
            Utf8_info = new string(asciiChars);
            return Utf8_info;
        }

 

 

posted @ 2010-01-13 14:18  Cutting.pht  阅读(1320)  评论(0编辑  收藏