C # Calculate Chinese characters as 2 Characters

In the current project, you need to calculate the length of the string and cut down the Fixed Length characters. The Chinese character must be calculated as two characters, and the numbers and letters must be calculated as one character, no ready-made functions found can be used, refer to how to get an exact length of a Chinese character and letter combination string (Asp.net version) http://www.webjx.com/htmldata/2005-10-20/1129777793.html

I have written the following two functions for reference. The main function is to take the copy String Based on the specified length and replace the substring function.

Private int getlength (string aorgstr)
{
Int intlen = aorgstr. length;
Int I;
Char [] chars = aorgstr. tochararray ();
For (I = 0; I <chars. length; I ++)
{
If (system. Convert. toint32 (chars [I])> 255)
{
Intlen ++;
}
}
Return intlen;
}

Private string mutisubstring (string aorgstr, int alength, ref string aafterstr)
{
Int intlen = aorgstr. length;
Int start = 0;
Int end = intlen;
Int single = 0;
Char [] chars = aorgstr. tochararray ();
For (INT I = 0; I <chars. length; I ++)
{
If (system. Convert. toint32 (chars [I])> 255)
{
Start + = 2;
}
Else
{
Start + = 1;
Single ++;
}
If (Start> = alength)
{

If (end % 2 = 0)
{
If (single % 2 = 0)
{
End = I + 1;
}
Else
{
End = I;
}
}
Else
{
End = I + 1;
}
Break;
}
}
String temp = aorgstr. substring (0, end );
String temp2 = aorgstr. Remove (0, end );
Aafterstr = temp2;
Return temp;
}

Running result:

STR = mutisubstring ("ABC Chinese character", 5, aafterstr)

STR = "ABC Han"

Aafterstr = "character"

The problem of using Str. length as a character