1   public bool IsChinaString(string CString)
 2         {
 3           bool BoolValue = false;
 4           for (int i = 0; i < CString.Length; i++)
 5             {
 6               if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1)))< Convert.ToInt32(Convert.ToChar(128)))
 7                 {
 8                   BoolValue = false;
 9                  }
10                  else
11                 {
12 
13                     return BoolValue = true;
14                 }
15                 }
16 
17               return BoolValue;
18 
19         }

 1   var c = $("#txtStreet").val().charCodeAt(0);
 2                              if (c >= 65 && c <= 90 || c >= 97 && c <= 122) {
 3                              
 4                                  return {
 5                                      label: item.StreetName_EN + "," + item.StreetName1,
 6                                      value: item.StreetName_EN + "," + item.StreetName1,
 7                                       }
 8                                } else {
 9                              
10                                  return {
11                                      label: item.StreetName1 + "," + item.StreetName_EN,
12                                      value: item.StreetName1 + "," + item.StreetName_EN,
13                                  }