C # filter strings to keep only one

Method 1: Original Ecology: Call filterRepeatChar ("Zhu Yajun, Yao yier, tu Jing, tu Jing, Liu Gang, Yao yier ")

Public static string filterRepeatChar (string _ val)
{
String _ str = string. Empty;
String [] strArray = _ val. Split (',');
For (int I = 0; I <strArray. Length; I ++)
{
For (int j = I + 1; j <strArray. Length; j ++)
{
If (strArray [j] = strArray [I])
{
StrArray [I] = string. Empty;
}
}
If (strArray [I]! = String. Empty)
_ Str + = strArray [I] + ",";
}
If (_ str. LastIndexOf (",")>-1)
_ Str = _ str. Substring (0, _ str. Length-1 );
Return _ str;
}

 

Method 2: Use linq to implement filterRepeatCharToLinq ("Zhu Yajun, Yao yier, tu Jing, tu Jing, Liu Gang, Yao yier s ")

Public static string filterRepeatCharToLinq (string _ val)
{

Var wq = from p in _ val. Split (','). Distinct ()
Select p;

String rw = "";
Foreach (var kk in wq)
{
Rw + = kk. ToString () + ",";
}
Rw = rw. TrimEnd (',');

Return rw;

}