/// <summary>
/// 检查Request查询字符串的键值，是否是数字，最大长度限制
/// </summary>
/// <param name="req">Request</param>
/// <param name="inputKey">Request的键值</param>
/// <param name="maxLen">最大长度</param>
/// <returns>返回Request查询字符串</returns>
public static string FetchInputDigit(HttpRequest req, string inputKey, int maxLen)
{
string retVal = string.Empty;
if (inputKey != null && inputKey != string.Empty)
{
retVal = req.QueryString[inputKey];
if (null == retVal)
{
retVal = req.Form[inputKey];
}
if (null != retVal)
{
retVal = StringHelper.TextSubLength(retVal, maxLen);
if (!RegexCheck.IsNumber(retVal))
{
retVal = string.Empty;
}
}
}
if (retVal == null)
{
retVal = string.Empty;
}
return(retVal);
}
/// <summary>
/// 验证IP地址是否合法
/// </summary>
/// <param name="ip">要验证的IP地址</param>
public static bool IsIP(string ip)
{
//如果为空，认为验证合格
if (IsNullOrEmpty(ip))
{
return(true);
}
//清除要验证字符串中的空格
ip = ip.Trim();
//模式字符串
string pattern = @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$";
//验证
return(RegexCheck.IsMatch(ip, pattern));
}
/// <summary>
/// 验证是否为整数 如果为空，认为验证不合格 返回false
/// </summary>
/// <param name="number">要验证的整数</param>
public static bool IsInt(string number)
{
//如果为空，认为验证不合格
if (IsNullOrEmpty(number))
{
return(false);
}
//清除要验证字符串中的空格
number = number.Trim();
//模式字符串
string pattern = @"^[0-9]+[0-9]*$";
//验证
return(RegexCheck.IsMatch(number, pattern));
}
/// <summary>
/// 返回客户端浏览器版本
/// 如果是IE类型，返回版本数字
/// 如果不是IE类型，返回-1
/// </summary>
/// <returns>一位数字版本号</returns>
public static int GetClientBrowserVersion()
{
string USER_AGENT = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_USER_AGENT"];
if (USER_AGENT.IndexOf("MSIE") < 0)
{
return(-1);
}
string version = USER_AGENT.Substring(USER_AGENT.IndexOf("MSIE") + 5, 1);
if (!RegexCheck.IsInt(version))
{
return(-1);
}
return(Convert.ToInt32(version));
}