C#实现对用户输入数据进行校验的类实例
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2023-12-01 15:45:46
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...
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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