C#中判断字符串是否中文的方法

  public bool IsChinaString(string CString)
        {
          bool BoolValue = false;
          for (int i = 0; i < CString.Length; i++)
            {
              if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1)))< Convert.ToInt32(Convert.ToChar(128)))
                {
                  BoolValue = false;
                 }
                 else
                {

                    return BoolValue = true;
                }
                }

              return BoolValue;

        }

 页面中使用jquery判断文本框先输入的中文还是英文的判断

  var c = $("#txtStreet").val().charCodeAt(0);
                             if (c >= 65 && c <= 90 || c >= 97 && c <= 122) {
                             
                                 return {
                                     label: item.StreetName_EN + "," + item.StreetName1,
                                     value: item.StreetName_EN + "," + item.StreetName1,
                                      }
                               } else {
                             
                                 return {
                                     label: item.StreetName1 + "," + item.StreetName_EN,
                                     value: item.StreetName1 + "," + item.StreetName_EN,
                                 }