下面列举的是常用的正则表达式
/// <summary>
/// 检测是否符合email格式
/// </summary>
/// <param name="strEmail">要判断的email字符串</param>
/// <returns>判断结果</returns>
public static bool IsValidEmail(string strEmail)
{
return Regex.IsMatch(strEmail, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
}
public static bool IsValidDoEmail(string strEmail)
{
return Regex.IsMatch(strEmail, @"^@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
}
/// <summary>
/// 检测是否是正确的Url
/// </summary>
/// <param name="strUrl">要验证的Url</param>
/// <returns>判断结果</returns>
public static bool IsURL(string strUrl)
{
return Regex.IsMatch(strUrl, @"^(http|https)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{1,10}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
}
/// <summary>
/// 检测是否是字母或者数字的字符串
/// </summary>
/// <param name="strIn">要验证的字符串</param>
/// <returns></returns>
public static bool IsValidString(string strIn)
{
return Regex.IsMatch(strIn, @"^[A-Za-z0-9]+$");
}
/// <summary>
/// 判断电话/传真
/// </summary>
/// <param name="Tel"></param>
/// <returns></returns>
public static bool IsValidTel(string Tel)
{
return Regex.IsMatch(Tel, @"^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$");
}
/// <summary>
/// 邮政编码
/// </summary>
/// <param name="Zip"></param>
/// <returns></returns>
public static bool IsValidZip(string Zip)
{
return Regex.IsMatch(Zip, @"^[a-z0-9 ]{3,12}$");
}
/// <summary>
/// 判断只能输字母
/// </summary>
/// <param name="EnName"></param>
/// <returns></returns>
public static bool IsValidEnName(string EnName)
{
return Regex.IsMatch(EnName, @"[a-zA-Z]");
}
/// <summary>
/// 判断是否为base64字符串
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static bool IsBase64String(string str)
{
//A-Z, a-z, 0-9, +, /, =
return Regex.IsMatch(str, @"[A-Za-z0-9\+\/\=]");
}
/// <summary>
/// 检测是否有Sql危险字符
/// </summary>
/// <param name="str">要判断字符串</param>
/// <returns>判断结果</returns>
public static bool IsSafeSqlString(string str)
{
return !Regex.IsMatch(str, @"[-|;|,|\/|\(|\)|\[|\]|\}|\{|%|@|\*|!|\']");
}
/// <summary>
/// 检测是否有危险的可能用于链接的字符串
/// </summary>
/// <param name="str">要判断字符串</param>
/// <returns>判断结果</returns>
public static bool IsSafeUserInfoString(string str)
{
return !Regex.IsMatch(str, @"^\s*$|^c:\\con\\con$|[%,\*" + "\"" + @"\s\t\<\>\&]|游客|^Guest");
}
/// <summary>
/// 判断文件流是否为UTF8字符集
/// </summary>
/// <param name="sbInputStream">文件流</param>
/// <returns>判断结果</returns>
private static bool IsUTF8(FileStream sbInputStream)
{
int i;
byte cOctets; // octets to go in this UTF-8 encoded character
byte chr;
bool bAllAscii = true;
long iLen = sbInputStream.Length;
cOctets = 0;
for (i = 0; i < iLen; i++)
{
chr = (byte)sbInputStream.ReadByte();
if ((chr & 0x80) != 0) bAllAscii = false;
if (cOctets == 0)
{
if (chr >= 0x80)
{
do
{
chr <<= 1;
cOctets++;
}
while ((chr & 0x80) != 0);
cOctets--;
if (cOctets == 0) return false;
}
}
else
{
if ((chr & 0xC0) != 0x80)
{
return false;
}
cOctets--;
}
}
if (cOctets > 0)
{
return false;
}
if (bAllAscii)
{
return false;
}
return true;
}
/// <summary>
/// 是否为ip
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static bool IsIP(string ip)
{
return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
}
public static bool IsIPSect(string ip)
{
return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){2}((2[0-4]\d|25[0-5]|[01]?\d\d?|\*)\.)(2[0-4]\d|25[0-5]|[01]?\d\d?|\*)$");
}
/// <summary>
/// 判断指定字符串在指定字符串数组中的位置
/// </summary>
/// <param name="strSearch">字符串</param>
/// <param name="stringArray">字符串数组</param>
/// <param name="caseInsensetive">是否不区分大小写, true为不区分, false为区分</param>
/// <returns>字符串在指定字符串数组中的位置, 如不存在则返回-1</returns>
public static int GetInArrayID(string strSearch, string[] stringArray, bool caseInsensetive)
{
for (int i = 0; i < stringArray.Length; i++)
{
if (caseInsensetive)
{
if (strSearch.ToLower() == stringArray[i].ToLower())
{
return i;
}
}
else
{
if (strSearch == stringArray[i])
{
return i;
}
}
}
return -1;
}
/// <summary>
/// 判断指定字符串是否属于指定字符串数组中的一个元素
/// </summary>
/// <param name="strSearch">字符串</param>
/// <param name="stringArray">字符串数组</param>
/// <param name="caseInsensetive">是否不区分大小写, true为不区分, false为区分</param>
/// <returns>判断结果</returns>
public static bool InArray(string strSearch, string[] stringArray, bool caseInsensetive)
{
return GetInArrayID(strSearch, stringArray, caseInsensetive) >= 0;
}
/// <summary>
/// 判断指定字符串是否属于指定字符串数组中的一个元素
/// </summary>
/// <param name="str">字符串</param>
/// <param name="stringarray">字符串数组</param>
/// <returns>判断结果</returns>
public static bool InArray(string str, string[] stringarray)
{
return InArray(str, stringarray, false);
}
/// <summary>
/// json 数据为空
/// </summary>
public static bool JsonIsNull(string jsonstr)
{
jsonstr=jsonstr.Trim();
if (jsonstr == "" || jsonstr == "[]" || jsonstr == "{}" || jsonstr == "[" || jsonstr == "]" || jsonstr == "{" || jsonstr == "}")
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 判断数据是否为正数
/// </summary>
/// <param name="number"></param>
/// <returns></returns>
public static bool IsPositiveNumber(int number)
{
return Math.Sign(number)==1?true:false;
}