C#实现对用户输入数据进行校验的类实例

本文实例讲述了C#实现对用户输入数据进行校验的类。分享给大家供大家参考。具体如下：

这个C#类包含了各种常用数据验证的函数，包含验证是否是数字，校验email格式，区分中英文截取字符串，区分中英文计算字符串长度，检测是否包含中文字符，判断是否包含特定字符等

using System;
using System.Text;
using System.Web;
using System.Web.UI.WebControls;
using System.Text.Regularexpressions;
namespace DotNet.Utilities
{
  public class Pagevalidate
  {
    private static Regex RegNumber = new Regex("^[0-9]+$");
    private static Regex RegNumberSign = new Regex("^[+-]?[0-9]+$");
    private static Regex RegDecimal = new Regex("^[0-9]+[.]?[0-9]+$");
    private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等价于^[+-]?d+[.]?d+$
    private static Regex RegEmail = new Regex("^[\w-]+@[\w-]+\.(com|net|org|edu|mil|tv|biz|info)$");//w 英文字母或数字的字符串，和 [a-zA-Z0-9] 语法一样
    private static Regex RegCHZN = new Regex("[u4e00-u9fa5]");
    public Pagevalidate()
    {
    }
 
    #region 数字字符串检查
    /// 

    /// 格式化字符串
    /// 
    /// 源字符串
    /// 0:不做验证| 1:sql语句参数| 2:存储过程参数| 3:EncodeHtml| 4:Encode+sql| 5:Encode+存储过程
    /// 返回格式化后的字符串
    public static string FormatString(string inputData, int formatlevel)
    {
      return inputData;
    }
    /// 

    /// 检查Request查询字符串的键值，是否是数字，最大长度限制
    /// 
    /// Request
    /// Request的键值
    /// 最大长度
    /// 返回Request查询字符串
    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 = SqlText(retVal, maxLen);
   if (!IsNumber(retVal))
     retVal = string.Empty;
 }
      }
      if (retVal == null)
 retVal = string.Empty;
      return retVal;
    }
    public enum CheckType
    { None, Int, SignInt, Float, SignFloat, Chinese, Mail }
    /// 

    /// 检测字符串类型
    /// 
    /// 输入字符串
    /// 0:不检测| 1:数字| 2:符号数字| 3: 浮点数| 4:符号浮点| 5: 中文?| 6:邮件?
    /// 
    public static bool checkString(string inputData, int checktype)
    {
      bool _return = false;
      switch (checktype)
      {
 case 0:
   _return = true;
   break;
 case 1:
   _return = IsNumber(inputData);
   break;
 case 2:
   _return = IsNumberSign(inputData);
   break;
 case 3:
   _return = IsDecimal(inputData);
   break;
 case 4:
   _return = IsDecimalSign(inputData);
   break;
 case 5:
   _return = IsHasCHZN(inputData);
   break;
 case 6:
   _return = IsEmail(inputData);
   break;
 default:
   _return = false;
   break;
      }
      return _return;
    }
    /// 

    /// 是否数字字符串
    /// 
    /// 输入字符串
    /// 
    public static bool IsNumber(string inputData)
    {
      Match m = RegNumber.Match(inputData);
      return m.Success;
    }
    /// 

    /// 是否数字字符串 可带正负号
    /// 
    /// 输入字符串
    /// 
    public static bool IsNumberSign(string inputData)
    {
      Match m = RegNumberSign.Match(inputData);
      return m.Success;
    }
    /// 

    /// 是否是浮点数
    /// 
    /// 输入字符串
    /// 
    public static bool IsDecimal(string inputData)
    {
      Match m = RegDecimal.Match(inputData);
      return m.Success;
    }
    /// 

    /// 是否是浮点数 可带正负号
    /// 
    /// 输入字符串
    /// 
    public static bool IsDecimalSign(string inputData)
    {
      Match m = RegDecimalSign.Match(inputData);
      return m.Success;
    }
    #endregion
    #region 中文检测
    /// 

    /// 检测是否有中文字符
    /// 
    /// 
    /// 
    public static bool IsHasCHZN(string inputData)
    {
      Match m = RegCHZN.Match(inputData);
      return m.Success;
    }
    #endregion
    public static string GetShortDate(string dt)
    {
      return Convert.ToDateTime(dt).ToShortDateString();
    }
    #region 邮件地址
    /// 

    /// 是否是浮点数 可带正负号
    /// 
    /// 输入字符串
    /// 
    public static bool IsEmail(string inputData)
    {
      Match m = RegEmail.Match(inputData);
      return m.Success;
    }
    #endregion
    #region 其他
    /// 

    /// 检查字符串最大长度，返回指定长度的串
    /// 
    /// 输入字符串
    /// 最大长度
    ///     
    public static string SqlText(string sqlInput, int maxLength)
    {
      if (sqlInput != null && sqlInput != string.Empty)
      {
 sqlInput = sqlInput.Trim();
 if (sqlInput.Length > maxLength)//按最大长度截取字符串
   sqlInput = sqlInput.Substring(0, maxLength);
      }
      return sqlInput;
    }
 
    /// 

    /// 字符串编码
    /// 
    /// 
    /// 
    public static string HtmlEncode(string inputData)
    {
      return HttpUtility.HtmlEncode(inputData);
    }
    /// 

    /// 设置Label显示Encode的字符串
    /// 
    /// 
    /// 
    public static void SetLabel(Label lbl, string txtInput)
    {
      lbl.Text = HtmlEncode(txtInput);
    }
    public static void SetLabel(Label lbl, object inputObj)
    {
      SetLabel(lbl, inputObj.ToString());
    }
    #endregion
    #region 对于用户权限从数据库中读出的解密过程
    public static string switch_riddle(string s_ch)//解密
    {
      string s_out, s_temp, temp;
      int i_len = s_ch.Length;
      if (i_len == 0 || s_ch == "")
      {
 s_out = "0";
      }
      temp = "";
      s_temp = "";
      s_out = "";
      for (int i = 0; i <= i_len - 1; i++)
      {
 temp = s_ch.Substring(i, 1);
 switch (temp)
 {
   case "a": s_temp = "1010";
     break;
   case "b": s_temp = "1011";
     break;
   case "c": s_temp = "1100";
     break;
   case "d": s_temp = "1101";
     break;
   case "e": s_temp = "1110";
     break;
   case "f": s_temp = "1111";
     break;
   case "0": s_temp = "0000";
     break;
   case "1": s_temp = "0001";
     break;
   case "2": s_temp = "0010";
     break;
   case "3": s_temp = "0011";
     break;
   case "4": s_temp = "0100";
     break;
   case "5": s_temp = "0101";
     break;
   case "6": s_temp = "0110";
     break;
   case "7": s_temp = "0111";
     break;
   case "8": s_temp = "1000";
     break;
   case "9": s_temp = "1001";
     break;
   default: s_temp = "0000";
     break;
 }
 s_out = s_out + s_temp;
 s_temp = "";
      }
      return s_out;
    }
    #endregion
    #region 用户权限的加密过程
    public static string switch_encrypt(string s_ch)
    {
      string s_out, s_temp, temp;
      int i_len = 64;
      if (i_len == 0 || s_ch == "")
      {
 s_out = "0000";
      }
      temp = "";
      s_temp = "";
      s_out = "";
      for (int i = 0; i <= i_len - 1; i = i + 4)
      {
 temp = s_ch.Substring(i, 4);
 switch (temp)
 {
   case "1010": s_temp = "a";
     break;
   case "1011": s_temp = "b";
     break;
   case "1100": s_temp = "c";
     break;
   case "1101": s_temp = "d";
     break;
   case "1110": s_temp = "e";
     break;
   case "1111": s_temp = "f";
     break;
   case "0000": s_temp = "0";
     break;
   case "0001": s_temp = "1";
     break;
   case "0010": s_temp = "2";
     break;
   case "0011": s_temp = "3";
     break;
   case "0100": s_temp = "4";
     break;
   case "0101": s_temp = "5";
     break;
   case "0110": s_temp = "6";
     break;
   case "0111": s_temp = "7";
     break;
   case "1000": s_temp = "8";
     break;
   case "1001": s_temp = "9";
     break;
   default: s_temp = "0";
     break;
 }
 s_out = s_out + s_temp;
 s_temp = "";
      }
      return s_out;
    }//加密
    #endregion
    #region  访问权限
    public static bool CheckTrue(string s_admin, int a)
    {
      string s_temp = "";
      s_temp = s_admin.Substring(a - 1, 1);  //s_admin为全局变量
      if (s_temp == "" || s_temp == "1")
      {
 return true;
      }
      else
      {
 return false;
      }
    }
    #endregion
    #region  检测字符串长度
    /// 
 
    /// 计算文本长度，区分中英文字符，中文算两个长度，英文算一个长度
    /// 
    /// 需计算长度的字符串
    /// int
    public static int Text_Length(string Text)
    {
      int len = 0;
      for (int i = 0; i < Text.Length; i++)
      {
 byte[] byte_len = Encoding.Default.GetBytes(Text.Substring(i, 1));
 if (byte_len.Length > 1)
   len += 2; //如果长度大于1，是中文，占两个字节，+2
 else
   len += 1; //如果长度等于1，是英文，占一个字节，+1
      }
      return len;
    }
    #endregion
    #region  字符串长度区分中英文截取
    /// 
 
    /// 截取文本，区分中英文字符，中文算两个长度，英文算一个长度
    /// 
    /// 待截取的字符串
    /// 需计算长度的字符串
    /// string
    public static string GetSubString(string str, int length)
    {
      string temp = str;
      int j = 0;
      int k = 0;
      for (int i = 0; i < temp.Length; i++)
      {
 if (Regex.IsMatch(temp.Substring(i, 1), @"[u4e00-u9fa5]+"))
 {
   j += 2;
 }
 else
 {
   j += 1;
 }
 if (j <= length)
 {
   k += 1;
 }
 if (j > length)
 {
   return temp.Substring(0, k) + "..";
 }
      }
      return temp;
    }
    #endregion
    #region 页面HTML格式化
    public static string GetHtml(string sDetail)
    {
      Regex r;
      Match m;
      #region 处理空格
      sDetail = sDetail.Replace(" ", " ");
      #endregion
      #region 处理单引号
      sDetail = sDetail.Replace("'", "'");
      #endregion
      #region 处理双引号
      sDetail = sDetail.Replace(""", """);
      #endregion
      #region html标记符
      sDetail = sDetail.Replace("<", "<");
      sDetail = sDetail.Replace(">", ">");
      #endregion
      #region 处理换行
      //处理换行，在每个新行的前面添加两个全角空格
      r = new Regex(@"(rn(( )|　)+)(?<正文>S+)", RegexOptions.IgnoreCase);
      for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
      {
 sDetail = sDetail.Replace(m.Groups[0].ToString(), "
　　" + m.Groups["正文"].ToString());
      }
      //处理换行，在每个新行的前面添加两个全角空格
      sDetail = sDetail.Replace("rn", "
");
      #endregion
      return sDetail;
    }
    #endregion
    #region 分页
    //public static string paging(string url, string para, int sumpage, int page)
    //{
    //  string result = string.Empty;
    //  if (sumpage == 1)
    //  {
    //    return result;
    //  }
    //  if (page > sumpage)
    //  {
    //    page = 1;
    //  }
    //  if (sumpage > 0)
    //  {
    //    for (int i = 1; i <= sumpage; i++)
    //    {
    //      if (i == page)
    //      {
    // result += string.Format("{3} ", new object[] { url, i.ToString(), para, i.ToString() });
    //      }
    //      else
    //      {
    // result += string.Format("{3} ", new object[] { url, i.ToString(), para, i.ToString() });
    //      }
    //    }
    //  }
    //  return result;
    //}
    public static string paging(string url, string para, int sumpage, int page)
    {
      string result = string.Empty;
      if (sumpage == 1)
      {
 return result;
      }
      if (sumpage > 500)
      {
 sumpage = 500;
      }
      if (page > sumpage)
      {
 page = 1;
      }
      StringBuilder sb = new StringBuilder();
      if (sumpage > 0)
      {
 switch (page)
 {
   case 1:
     sb.Append(string.Format("
{3} ", new object[] { url, page + 1, para, "下一页" }));
     break;
   default:
     if (sumpage == page)
     {
sb.Append(string.Format("
{3} ", new object[] { url, page - 1, para, "上一页" }));
     }
     else
     {
sb.Append(string.Format("
{3} {7} ",
  new object[] { url, page + 1, para, "下一页", url, page - 1, para, "上一页" }));
     }
     break;
 }
 sb.Append(string.Format("第{0}/{1}页
", new object[] { page, sumpage }));
      }
      return sb.ToString();
    }
    public static string paging(string url, string para, int sumpage, int page, System.Web.UI.UserControl myPaging)
    {
      myPaging.Visible = false;
      string result = string.Empty;
      if (sumpage == 1)
      {
 return result;
      }
      if (sumpage > 500)
      {
 sumpage = 500;
      }
      if (page > sumpage)
      {
 page = 1;
      }
      StringBuilder sb = new StringBuilder();
      if (sumpage > 0)
      {
 myPaging.Visible = true;
 switch (page)
 {
   case 1:
     sb.Append(string.Format("{3} ", new object[] { url, page + 1, para, "下一页" }));
     break;
   default:
     if (sumpage == page)
     {
sb.Append(string.Format("{3} ", new object[] { url, page - 1, para, "上一页" }));
     }
     else
     {
sb.Append(string.Format("{3} {7} ",
  new object[] { url, page + 1, para, "下一页", url, page - 1, para, "上一页" }));
     }
     break;
 }
 sb.Append(string.Format("第{0}/{1}页", new object[] { page, sumpage }));
      }
      return sb.ToString();
    }
    public static string paging(string para, int sumpage, int page, int count)
    {
      string result = string.Empty;
      if (page > sumpage)
      {
 page = 1;
      }
      StringBuilder sb = new StringBuilder();
      if (sumpage > 0)
      {
 if (sumpage != 1)
 {
   switch (page)
   {
     case 1:
sb.Append(string.Format("{2} ", new object[] { page + 1, para, "下一页" }));
break;
     default:
if (sumpage == page)
{
  sb.Append(string.Format("{2} ", new object[] { page - 1, para, "上一页" }));
}
else
{
  sb.Append(string.Format("{2} {5} ",
    new object[] { page - 1, para, "上一页", page + 1, para, "下一页" }));
}
break;
   }
 }
 sb.Append(string.Format("第{0}/{1}页 共{2}条", new object[] { page, sumpage, count }));
      }
      return sb.ToString();
    }
    public static void paging(string clinktail, int sumpage, int page, System.Web.UI.WebControls.Label page_view)
    {
      if (sumpage > 0)
      {
 int n = sumpage;  //总页数
 int x = page;  //得到当前页
 int i;
 int endpage;
 string pageview = "", pageviewtop = "";
 if (x > 1)
 {
   pageview += "  第1页 | ";
   pageviewtop += "  第1页 | ";
 }
 else
 {
   pageview += "   第1页  | ";
   pageviewtop += "   第1页  | ";
 }
 if (x > 1)
 {
   pageviewtop += " 上1页 ";
 }
 else
 {
   pageviewtop += " 上1页 ";
 }
 if (x > ((x - 1) / 10) * 10 && x > 10)
 {
   pageview += "上10页";
 }
 //if (((x-1) / 10) * 10 + 10) >= n )
 if (((x - 1) / 10) * 10 + 10 >= n)
 {
   endpage = n;
 }
 else
 {
   endpage = ((x - 1) / 10) * 10 + 10;
 }
 for (i = ((x - 1) / 10) * 10 + 1; i <= endpage; ++i)
 {
   if (i == x)
   {
     pageview += " " + i + "";
   }
   else
   {
     pageview += " " + i + "";
   }
 }
 if (x < n)
 {
   pageviewtop += " 下1页 ";
 }
 else
 {
   pageviewtop += " 下1页 ";
 }
 if (endpage != n)
 {
   pageview += " 下10页 | ";
 }
 else
 {
   pageview += " | ";
 }
 if (x < n)
 {
   pageview += " 第" + n + "页 ";
   pageviewtop += " | 第" + n + "页 ";
 }
 else
 {
   pageview += " 第" + n + "页 ";
   pageviewtop += " |  第" + n + "页 ";
 }
 page_view.Text = pageview.ToString();
      }
      else
      {
 page_view.Text = "";
      }
    }
    //带第一页和最后一页
    public static string paging2(string para, int sumpage, int page, int count)
    {
      string result = string.Empty;
      if (page > sumpage)
      {
 page = 1;
      }
      StringBuilder sb = new StringBuilder();
      if (sumpage > 0)
      {
 if (sumpage != 1)
 {
   //第一页
   sb.Append(string.Format("  ", new object[] { 1, para }));
   switch (page)
   {
     case 1:
//前一页图片
sb.Append(string.Format("{0}", new object[] { "" }));
sb.Append(string.Format("上一页{2} ", new object[] { page + 1, para, "下一页" }));
//后一页图片
sb.Append(string.Format("{2}", new object[] { page + 1, para, "" }));
break;
     default:
if (sumpage == page)
{
  //前一页图片
  sb.Append(string.Format("{2}", new object[] { page - 1, para, "" }));
  sb.Append(string.Format("{2}下一页 ", new object[] { page - 1, para, "上一页" }));
  //后一页图片
  sb.Append(string.Format("{0}", new object[] { "" }));
}
else
{
  //前一页图片
  sb.Append(string.Format("{2}", new object[] { page - 1, para, "" }));
  sb.Append(string.Format("{2} {5} ",
    new object[] { page - 1, para, "上一页", page + 1, para, "下一页" }));
  //后一页图片
  sb.Append(string.Format("{2}", new object[] { page + 1, para, "" }));
}
break;
   }
   //最后一页图片
   sb.Append(string.Format("    ", new object[] { sumpage, para }));
 }
 sb.Append(string.Format("第{0}页/共{1}页 共{2}条", new object[] { page, sumpage, count }));
      }
      return sb.ToString();
    }
    public static string paging3(string url, string para, int sumpage, int page, int count)
    {
      string result = string.Empty;
      if (page > sumpage)
      {
 page = 1;
      }
      StringBuilder sb = new StringBuilder();
      if (sumpage > 0)
      {
 if (sumpage != 1)
 {
   //第一页
   sb.Append(string.Format("首页", new object[] { 1, para, url }));
   switch (page)
   {
     case 1:
//前一页图片
// sb.Append(string.Format("{0}", new object[] { "" }));
sb.Append(string.Format("上一页{2} ", new object[] { page + 1, para, "下一页", url }));
//后一页图片
// sb.Append(string.Format("{2}", new object[] { page + 1, para, "" }));
break;
     default:
if (sumpage == page)
{
  //前一页图片
  //sb.Append(string.Format("{2}", new object[] { page - 1, para, "" }));
  sb.Append(string.Format("{2}下一页 ", new object[] { page - 1, para, "上一页", url }));
  //后一页图片
  //sb.Append(string.Format("{0}", new object[] { "" }));
}
else
{
  //前一页图片
  //sb.Append(string.Format("{2}", new object[] { page - 1, para, "" }));
  sb.Append(string.Format("{2} {5} ",
    new object[] { page - 1, para, "上一页", page + 1, para, "下一页", url }));
  //后一页图片
  //sb.Append(string.Format("{2}", new object[] { page + 1, para, "" }));
}
break;
   }
   //最后一页图片
   sb.Append(string.Format("末页  ", new object[] { sumpage, para, url }));
 }
 sb.Append(string.Format("第{0}页/共{1}页 共{2}条", new object[] { page, sumpage, count }));
      }
      return sb.ToString();
    }
    #endregion
    #region 日期格式判断
    /// 

    /// 日期格式字符串判断
    /// 
    /// 
    /// 
    public static bool IsDateTime(string str)
    {
      try
      {
 if (!string.IsNullOrEmpty(str))
 {
   DateTime.Parse(str);
   return true;
 }
 else
 {
   return false;
 }
      }
      catch
      {
 return false;
      }
    }
    #endregion
    #region 是否由特定字符组成
    public static bool isContainSameChar(string strInput)
    {
      string charInput = string.Empty;
      if (!string.IsNullOrEmpty(strInput))
      {
 charInput = strInput.Substring(0, 1);
      }
      return isContainSameChar(strInput, charInput, strInput.Length);
    }
    public static bool isContainSameChar(string strInput, string charInput, int lenInput)
    {
      if (string.IsNullOrEmpty(charInput))
      {
 return false;
      }
      else
      {
 Regex RegNumber = new Regex(string.Format("^([{0}])+$", charInput));
 //Regex RegNumber = new Regex(string.Format("^([{0}]{{1}})+$", charInput,lenInput));
 Match m = RegNumber.Match(strInput);
 return m.Success;
      }
    }
    #endregion
    #region 检查输入的参数是不是某些定义好的特殊字符：这个方法目前用于密码输入的安全检查
    /// 

    /// 检查输入的参数是不是某些定义好的特殊字符：这个方法目前用于密码输入的安全检查
    /// 
    public static bool isContainSpecChar(string strInput)
    {
      string[] list = new string[] { "123456", "654321" };
      bool result = new bool();
      for (int i = 0; i < list.Length; i++)
      {
 if (strInput == list[i])
 {
   result = true;
   break;
 }
      }
      return result;
    }
    #endregion
  }
}

希望本文所述对大家的C#程序设计有所帮助。