C#实现对用户输入数据进行校验的类 C#实现对用户输入数据进行校验的类实例
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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
/// <summary>
/// 格式化字符串
/// </summary>
/// <param name="inputData">源字符串</param>
/// <param name="formatlevel">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</param>
/// <returns>返回格式化后的字符串</returns>
public static string FormatString(string inputData, int formatlevel)
{
return inputData;
}
/// <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 = 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 }
/// <summary>
/// 检测字符串类型
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <param name="checktype">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?</param>
/// <returns></returns>
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;
}
/// <summary>
/// 是否数字字符串
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <returns></returns>
public static bool IsNumber(string inputData)
{
Match m = RegNumber.Match(inputData);
return m.Success;
}
/// <summary>
/// 是否数字字符串 可带正负号
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <returns></returns>
public static bool IsNumberSign(string inputData)
{
Match m = RegNumberSign.Match(inputData);
return m.Success;
}
/// <summary>
/// 是否是浮点数
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <returns></returns>
public static bool IsDecimal(string inputData)
{
Match m = RegDecimal.Match(inputData);
return m.Success;
}
/// <summary>
/// 是否是浮点数 可带正负号
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <returns></returns>
public static bool IsDecimalSign(string inputData)
{
Match m = RegDecimalSign.Match(inputData);
return m.Success;
}
#endregion
#region 中文检测
/// <summary>
/// 检测是否有中文字符
/// </summary>
/// <param name="inputData"></param>
/// <returns></returns>
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
/// <summary>
/// 是否是浮点数 可带正负号
/// </summary>
/// <param name="inputData">输入字符串</param>
/// <returns></returns>
public static bool IsEmail(string inputData)
{
Match m = RegEmail.Match(inputData);
return m.Success;
}
#endregion
#region 其他
/// <summary>
/// 检查字符串最大长度，返回指定长度的串
/// </summary>
/// <param name="sqlInput">输入字符串</param>
/// <param name="maxLength">最大长度</param>
/// <returns></returns>
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;
}
/// <summary>
/// 字符串编码
/// </summary>
/// <param name="inputData"></param>
/// <returns></returns>
public static string HtmlEncode(string inputData)
{
return HttpUtility.HtmlEncode(inputData);
}
/// <summary>
/// 设置Label显示Encode的字符串
/// </summary>
/// <param name="lbl"></param>
/// <param name="txtInput"></param>
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
/// <summary>
/// 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
/// </summary>
/// <param name="Text">需计算长度的字符串</param>
/// <returns>int</returns>
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
/// <summary>
/// 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
/// </summary>
/// <param name="str">待截取的字符串</param>
/// <param name="length">需计算长度的字符串</param>
/// <returns>string</returns>
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(@"(\r\n(( )| )+)(?<正文>\S+)", RegexOptions.IgnoreCase);
for (m = r.Match(sDetail); m.Success; m = m.NextMatch())
{
sDetail = sDetail.Replace(m.Groups[0].ToString(), "<BR> " + 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("\r\n", "<BR>");
#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("<a class=\"a_page\" href=\"{0}?page={1}{2}\">{3}</a> ", new object[] { url, i.ToString(), para, i.ToString() });
// }
// else
// {
// result += string.Format("<a href=\"{0}?page={1}{2}\">{3}</a> ", 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("<p class=\"next\"><a href=\"{0}?page={1}{2}\">{3}</a> ", new object[] { url, page + 1, para, "下一页" }));
break;
default:
if (sumpage == page)
{
sb.Append(string.Format("<p class=\"next\"><a href=\"{0}?page={1}{2}\">{3}</a> ", new object[] { url, page - 1, para, "上一页" }));
}
else
{
sb.Append(string.Format("<p class=\"next\"><a href=\"{0}?page={1}{2}\">{3}</a> <a href=\"{4}?page={5}{6}\">{7}</a> ",
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</p>", 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("<a href=\"{0}?page={1}{2}\">{3}</a> ", new object[] { url, page + 1, para, "下一页" }));
break;
default:
if (sumpage == page)
{
sb.Append(string.Format("<a href=\"{0}?page={1}{2}\">{3}</a> ", new object[] { url, page - 1, para, "上一页" }));
}
else
{
sb.Append(string.Format("<a href=\"{0}?page={1}{2}\">{3}</a> <a href=\"{4}?page={5}{6}\">{7}</a> ",
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("<a href=\"?page={0}{1}\">{2}</a> ", new object[] { page + 1, para, "下一页" }));
break;
default:
if (sumpage == page)
{
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a> ", new object[] { page - 1, para, "上一页" }));
}
else
{
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a> <a href=\"?page={3}{4}\">{5}</a> ",
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 += " <a class='pl' href='?page=1" + clinktail + "'>第1页</a> | ";
pageviewtop += " <a class='pl' href='?page=1" + clinktail + "'>第1页</a> | ";
}
else
{
pageview += " <font color='#666666'> 第1页 </font> | ";
pageviewtop += " <font color='#666666'> 第1页 </font> | ";
}
if (x > 1)
{
pageviewtop += " <a class='pl' href='?page=" + (x - 1) + "" + clinktail + "'>上1页</a> ";
}
else
{
pageviewtop += " <font color='#666666'>上1页</font> ";
}
if (x > ((x - 1) / 10) * 10 && x > 10)
{
pageview += "<a class='pl' href='?page=" + ((x - 1) / 10) * 10 + "" + clinktail + "' onclink='return false;'>上10页</a>";
}
//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 += " <font color='#FF0000'><b>" + i + "</b></font>";
}
else
{
pageview += " <a class='pl' href='?page=" + i + "" + clinktail + "'>" + i + "</a>";
}
}
if (x < n)
{
pageviewtop += " <a class='pl' href='?page=" + (x + 1) + "" + clinktail + "'>下1页</a> ";
}
else
{
pageviewtop += " <font color='#666666'>下1页</font> ";
}
if (endpage != n)
{
pageview += " <a class='pl' href='?page=" + (endpage + 1) + "" + clinktail + "' class='pl' onclink='return false;'>下10页</a> | ";
}
else
{
pageview += " | ";
}
if (x < n)
{
pageview += " <a class='pl' href='?page=" + n + "" + clinktail + "' class='pl'>第" + n + "页</a> ";
pageviewtop += " | <a class='pl' href='?page=" + n + "" + clinktail + "' class='pl'>第" + n + "页</a> ";
}
else
{
pageview += "<font color='#666666'> 第" + n + "页 </font>";
pageviewtop += " | <font color='#666666'> 第" + n + "页 </font>";
}
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("<a href=\"?page={0}{1}\"><img src=\"images/first-icon.gif\" border=\"0\"/></a> ", new object[] { 1, para }));
switch (page)
{
case 1:
//前一页图片
sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a>上一页</a><a href=\"?page={0}{1}\">{2}</a> ", new object[] { page + 1, para, "下一页" }));
//后一页图片
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page + 1, para, "<img src=\"images/right-icon.gif\" border=\"0\"/>" }));
break;
default:
if (sumpage == page)
{
//前一页图片
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page - 1, para, "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a><a>下一页</a> ", new object[] { page - 1, para, "上一页" }));
//后一页图片
sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=\"images/right-icon.gif\" />" }));
}
else
{
//前一页图片
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page - 1, para, "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a> <a href=\"?page={3}{4}\">{5}</a> ",
new object[] { page - 1, para, "上一页", page + 1, para, "下一页" }));
//后一页图片
sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page + 1, para, "<img src=\"images/right-icon.gif\" border=\"0\"/>" }));
}
break;
}
//最后一页图片
sb.Append(string.Format(" <a href=\"?page={0}{1}\"><img src=\"images/last-icon.gif\" border=\"0\"/></a> ", 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("<a href=\"{2}?page={0}{1}\">首页</a>", new object[] { 1, para, url }));
switch (page)
{
case 1:
//前一页图片
// sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a>上一页</a><a href=\"{3}?page={0}{1}\">{2}</a> ", new object[] { page + 1, para, "下一页", url }));
//后一页图片
// sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page + 1, para, "<img src=\"images/right-icon.gif\" border=\"0\"/>" }));
break;
default:
if (sumpage == page)
{
//前一页图片
//sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page - 1, para, "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a href=\"{3}?page={0}{1}\">{2}</a><a>下一页</a> ", new object[] { page - 1, para, "上一页", url }));
//后一页图片
//sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=\"images/right-icon.gif\" />" }));
}
else
{
//前一页图片
//sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page - 1, para, "<img src=\"images/left-icon.gif\" border=\"0\"/>" }));
sb.Append(string.Format("<a href=\"{6}?page={0}{1}\">{2}</a> <a href=\"{6}?page={3}{4}\">{5}</a> ",
new object[] { page - 1, para, "上一页", page + 1, para, "下一页", url }));
//后一页图片
//sb.Append(string.Format("<a href=\"?page={0}{1}\">{2}</a>", new object[] { page + 1, para, "<img src=\"images/right-icon.gif\" border=\"0\"/>" }));
}
break;
}
//最后一页图片
sb.Append(string.Format("<a href=\"{2}?page={0}{1}\">末页</a> ", 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
/// <summary>
/// 日期格式字符串判断
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
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
/// <summary>
/// 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
/// </summary>
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。
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