标题: 自定义C#数据验证、安全、转换类
作者: dnawo
日期: 2008-09-09 09:32 AM
分类: Web编程
内容: 1.数据验证类
复制内容到剪贴板 程序代码using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
public class DataValidator
{
/// <summary>
/// 实数验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsDecimal(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, "^[0-9]+[.]?[0-9]+$");
}
/// <summary>
/// 带符号的实数验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsDecimalSign(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, "^[+-]?[0-9]+[.]?[0-9]+$");
}
/// <summary>
/// 正整数验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsNumber(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, "^[0-9]+$");
}
/// <summary>
/// 整数验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsNumberSign(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, "^[+-]?[0-9]+$");
}
/// <summary>
/// 邮编验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsPostCode(string input)
{
return (IsNumber(input) && (input.Length == 6));
}
/// <summary>
/// 邮箱地址格式验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsEmail(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, @"^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$");
}
/// <summary>
/// IP地址验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsIP(string input)
{
return (!string.IsNullOrEmpty(input) && Regex.IsMatch(input.Trim(), @"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$"));
}
/// <summary>
/// URL验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsUrl(string input)
{
if (string.IsNullOrEmpty(input))
{
return false;
}
return Regex.IsMatch(input, @"^http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?$");
}
/// <summary>
/// 区号验证
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsAreaCode(string input)
{
return ((IsNumber(input) && (input.Length >= 3)) && (input.Length <= 5));
}
/// <summary>
/// 用户名格式验证,长度[0,20],不能含有\\/\"[]:|<>+=;,?*@
/// </summary>
/// <param name="userName"></param>
/// <returns></returns>
public static bool IsValidUserName(string userName)
{
if (string.IsNullOrEmpty(userName))
{
return false;
}
if (userName.Length > 20)
{
return false;
}
if (userName.Trim().Length == 0)
{
return false;
}
if (userName.Trim(new char[] { '.' }).Length == 0)
{
return false;
}
string str = "\\/\"[]:|<>+=;,?*@";
for (int i = 0; i < userName.Length; i++)
{
if (str.IndexOf(userName[i]) >= 0)
{
return false;
}
}
return true;
}
}
2.数据安全类
复制内容到剪贴板 程序代码using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
public class DataSecurity
{
/// <summary>
/// 特殊字符过滤
/// </summary>
/// <param name="strchar"></param>
/// <returns></returns>
public static string FilterBadChar(string strchar)
{
string input = "";
if (string.IsNullOrEmpty(strchar))
{
return "";
}
string str = strchar;
string[] strArray = new string[] {
"+", "'", "%", "^", "&", "?", "(", ")", "<", ">", "[", "]", "{", "}", "/", "\"",
";", ":", "Chr(34)", "Chr(0)", "--"
};
StringBuilder builder = new StringBuilder(str);
for (int i = 0; i < strArray.Length; i++)
{
input = builder.Replace(strArray[i], "").ToString();
}
return Regex.Replace(input, "@+", "@");
}
/// <summary>
/// SQL注入过滤
/// </summary>
/// <param name="strchar"></param>
/// <returns></returns>
public static string FilterSqlKeyword(string strchar)
{
bool flag = false;
if (string.IsNullOrEmpty(strchar))
{
return string.Empty;
}
strchar = strchar.ToLower();
string[] strArray = new string[] {
"select", "update", "insert", "delete", "declare", "@", "exec", "dbcc", "alter", "drop", "create", "backup", "if", "else", "end", "and",
"or", "add", "set", "open", "close", "use", "begin", "retun", "as", "go", "exists", "kill"
};
for (int i = 0; i < strArray.Length; i++)
{
if (strchar.Contains(strArray[i]))
{
strchar = strchar.Replace(strArray[i], "");
flag = true;
}
}
if (flag)
{
return FilterSqlKeyword(strchar);
}
return strchar;
}
/// <summary>
/// HTML编码
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string HtmlDecode(object value)
{
if (value == null)
{
return null;
}
return HtmlDecode(value.ToString());
}
/// <summary>
/// HTML编码
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string HtmlDecode(string value)
{
if (!string.IsNullOrEmpty(value))
{
value = value.Replace("<br>", "\n");
value = value.Replace("& gt;", ">");
value = value.Replace("& lt;", "<");
value = value.Replace("& nbsp;", " ");
value = value.Replace("& #39;", "'");
value = value.Replace("& quot;", "\"");
}
return value;
}
/// <summary>
/// HTML解码
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string HtmlEncode(object value)
{
if (value == null)
{
return null;
}
return HtmlEncode(value.ToString());
}
/// <summary>
/// HTML解码
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string HtmlEncode(string str)
{
if (!string.IsNullOrEmpty(str))
{
str = str.Replace("<", "& lt;");
str = str.Replace(">", "& gt;");
str = str.Replace(" ", "& nbsp;");
str = str.Replace("'", "& #39;");
str = str.Replace("\"", "& quot;");
str = str.Replace("\r\n", "<br>");
str = str.Replace("\n", "<br>");
}
return str;
}
}
3.数据转换类
复制内容到剪贴板 程序代码using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
public class DataConverter
{
/// <summary>
/// 日期转换
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static DateTime CDate(object input)
{
if (!Convert.IsDBNull(input) && !object.Equals(input, null))
{
return CDate(input.ToString());
}
return DateTime.Now;
}
/// <summary>
/// 日期转换
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static DateTime CDate(string input)
{
DateTime now;
if (!DateTime.TryParse(input, out now))
{
now = DateTime.Now;
}
return now;
}
/// <summary>
/// 日期转换
/// </summary>
/// <param name="input"></param>
/// <param name="outTime"></param>
/// <returns></returns>
public static DateTime? CDate(string input, DateTime? outTime)
{
DateTime time;
if (!DateTime.TryParse(input, out time))
{
return outTime;
}
return new DateTime?(time);
}
/// <summary>
/// 实数转换
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static decimal CDecimal(object input)
{
return CDecimal(input, 0M);
}
/// <summary>
/// 实数转换
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static decimal CDecimal(string input)
{
return CDecimal(input, 0M);
}
/// <summary>
/// 实数转换
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static decimal CDecimal(object input, decimal defaultValue)
{
if (!Convert.IsDBNull(input) && !object.Equals(input, null))
{
return CDecimal(input.ToString(), defaultValue);
}
return 0M;
}
/// <summary>
/// 实数转换
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static decimal CDecimal(string input, decimal defaultValue)
{
decimal num;
if (!decimal.TryParse(input, out num))
{
num = defaultValue;
}
return num;
}
/// <summary>
/// 双精
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static double CDouble(object input)
{
return CDouble(input, 0.0);
}
/// <summary>
/// 双精
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static double CDouble(string input)
{
return CDouble(input, 0.0);
}
/// <summary>
/// 双精
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static double CDouble(object input, double defaultValue)
{
if (!Convert.IsDBNull(input) && !object.Equals(input, null))
{
return CDouble(input.ToString(), defaultValue);
}
return 0.0;
}
/// <summary>
/// 双精
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static double CDouble(string input, double defaultValue)
{
double num;
if (!double.TryParse(input, out num))
{
return defaultValue;
}
return num;
}
/// <summary>
/// 整型
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static int CInt(object input)
{
return CInt(input, 0);
}
/// <summary>
/// 整型
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static int CInt(string input)
{
return CInt(input, 0);
}
/// <summary>
/// 整型
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static int CInt(object input, int defaultValue)
{
if (!Convert.IsDBNull(input) && !object.Equals(input, null))
{
return CInt(input.ToString(), defaultValue);
}
return defaultValue;
}
/// <summary>
/// 整型
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static int CInt(string input, int defaultValue)
{
int num;
if (!int.TryParse(input, out num))
{
num = defaultValue;
}
return num;
}
/// <summary>
/// 单精
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static float CFloat(object input)
{
return CFloat(input, 0f);
}
/// <summary>
/// 单精
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static float CFloat(string input)
{
return CFloat(input, 0f);
}
/// <summary>
/// 单精
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static float CFloat(object input, float defaultValue)
{
if (!Convert.IsDBNull(input) && !object.Equals(input, null))
{
return CFloat(input.ToString(), defaultValue);
}
return 0f;
}
/// <summary>
/// 单精
/// </summary>
/// <param name="input"></param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static float CFloat(string input, float defaultValue)
{
float num;
if (!float.TryParse(input, out num))
{
num = defaultValue;
}
return num;
}
}
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标题: 自定义C#数据验证、安全、转换类
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