asp.net string binary encoding array conversion function

1. String to 2 array
string content=" this is a test!" ;

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

2.2 convert the base array to a string

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

In programming, you will encounter the case of saving files in binary data to the database. For example, save "C:\ test.html "files to the database and read them out:

1. Save the file as a stream to the database:

 
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) 
　　{// Here you can do something like filter the data in the file  
　　 sb.Append(sLine); 

　　 } 
　} 

objReader.Close(); 

content= sb.ToString(); // If you want to display the contents of the entire file on the screen, you can use <%=content%> Put it in the right place  

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

// To insert the code into the database,  

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){// Success! } 

2. Reading saved as a file or string from the database is the opposite of step 1


1. Convert GB2312 data to UTF-8 data as follows (other codes are equivalent) :

 
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; 
}