本文實例講述了C#實現對用戶輸入數據進行校驗的類。分享給大家供大家參考。具體如下：
這個C#類包含了各種常用數據驗證的函數，包含驗證是否是數字，校驗email格式，區分中英文截取字符串，區分中英文計算字符串長度，檢測是否包含中文字符，判斷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]+$"); private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等價于^[+-]?/d+[.]?/d+$ private static Regex RegEmail = new Regex("^[//w-]+@[//w-]+//.(com|net|org|edu|mil|tv|biz|info)$");//w 英文字母或數字的字符串，和 [a-zA-Z0-9] 語法一樣 private static Regex RegCHZN = new Regex("[/u4e00-/u9fa5]"); public PageValidate() { } #region 數字字符串檢查 /// <summary> /// 格式化字符串 /// </summary> /// <param name="inputData">源字符串</param> /// <param name="formatlevel">0:不做驗證| 1:sql語句參數| 2:存儲過程參數| 3:EncodeHtml| 4:Encode+sql| 5:Encode+存儲過程</param> /// <returns>返回格式化后的字符串</returns> public static string FormatString(string inputData, int formatlevel) { return inputData; } /// <summary> /// 檢查Request查詢字符串的鍵值，是否是數字，最大長度限制 /// </summary> /// <param name="req">Request</param> /// <param name="inputKey">Request的鍵值</param> /// <param name="maxLen">最大長度</param> /// <returns>返回Request查詢字符串</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> /// 檢測字符串類型 /// </summary> /// <param name="inputData">輸入字符串</param> /// <param name="checktype">0:不檢測| 1:數字| 2:符號數字| 3: 浮點數| 4:符號浮點| 5: 中文?| 6:郵件?</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> /// 是否數字字符串 /// </summary> /// <param name="inputData">輸入字符串</param> /// <returns></returns> public static bool IsNumber(string inputData) { Match m = RegNumber.Match(inputData); return m.Success; } /// <summary> /// 是否數字字符串 可帶正負號 /// </summary> /// <param name="inputData">輸入字符串</param> /// <returns></returns> public static bool IsNumberSign(string inputData) { Match m = RegNumberSign.Match(inputData); return m.Success; } /// <summary> /// 是否是浮點數 /// </summary> /// <param name="inputData">輸入字符串</param> /// <returns></returns> public static bool IsDecimal(string inputData) { Match m = RegDecimal.Match(inputData); return m.Success; } /// <summary> /// 是否是浮點數 可帶正負號 /// </summary> /// <param name="inputData">輸入字符串</param> /// <returns></returns> public static bool IsDecimalSign(string inputData) { Match m = RegDecimalSign.Match(inputData); return m.Success; } #endregion #region 中文檢測 /// <summary> /// 檢測是否有中文字符 /// </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 郵件地址 /// <summary> /// 是否是浮點數 可帶正負號 /// </summary> /// <param name="inputData">輸入字符串</param> /// <returns></returns> public static bool IsEmail(string inputData) { Match m = RegEmail.Match(inputData); return m.Success; } #endregion #region 其他 /// <summary> /// 檢查字符串最大長度，返回指定長度的串 /// </summary> /// <param name="sqlInput">輸入字符串</param> /// <param name="maxLength">最大長度</param> /// <returns></returns> public static string SqlText(string sqlInput, int maxLength) { if (sqlInput != null && sqlInput != string.Empty) { sqlInput = sqlInput.Trim(); if (sqlInput.Length > maxLength)//按最大長度截取字符串 sqlInput = sqlInput.Substring(0, maxLength); } return sqlInput; } /// <summary> /// 字符串編碼 /// </summary> /// <param name="inputData"></param> /// <returns></returns> public static string HtmlEncode(string inputData) { return HttpUtility.HtmlEncode(inputData); } /// <summary> /// 設置Label顯示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 對于用戶權限從數據庫中讀出的解密過程 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 用戶權限的加密過程 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 訪問權限 public static bool CheckTrue(string s_admin, int a) { string s_temp = ""; s_temp = s_admin.Substring(a - 1, 1); //s_admin為全局變量 if (s_temp == "" || s_temp == "1") { return true; } else { return false; } } #endregion #region 檢測字符串長度 /// <summary> /// 計算文本長度，區分中英文字符，中文算兩個長度，英文算一個長度 /// </summary> /// <param name="Text">需計算長度的字符串</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; //如果長度大于1，是中文，占兩個字節，+2 else len += 1; //如果長度等于1，是英文，占一個字節，+1 } return len; } #endregion #region 字符串長度區分中英文截取 /// <summary> /// 截取文本，區分中英文字符，中文算兩個長度，英文算一個長度 /// </summary> /// <param name="str">待截取的字符串</param> /// <param name="length">需計算長度的字符串</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 頁面HTML格式化 public static string GetHtml(string sDetail) { Regex r; Match m; #region 處理空格 sDetail = sDetail.Replace(" ", " "); #endregion #region 處理單引號 sDetail = sDetail.Replace("'", "'"); #endregion #region 處理雙引號 sDetail = sDetail.Replace("/"", """); #endregion #region html標記符 sDetail = sDetail.Replace("<", "<"); sDetail = sDetail.Replace(">", ">"); #endregion #region 處理換行 //處理換行，在每個新行的前面添加兩個全角空格 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()); } //處理換行，在每個新行的前面添加兩個全角空格 sDetail = sDetail.Replace("/r/n", "<BR>"); #endregion return sDetail; } #endregion #region 分頁 //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, "下一頁" })); 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, "上一頁" })); } 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, "下一頁", url, page - 1, para, "上一頁" })); } break; } sb.Append(string.Format("第{0}/{1}頁</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, "下一頁" })); break; default: if (sumpage == page) { sb.Append(string.Format("<a href=/"{0}?page={1}{2}/">{3}</a> ", new object[] { url, page - 1, para, "上一頁" })); } 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, "下一頁", url, page - 1, para, "上一頁" })); } break; } sb.Append(string.Format("第{0}/{1}頁", 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, "下一頁" })); break; default: if (sumpage == page) { sb.Append(string.Format("<a href=/"?page={0}{1}/">{2}</a> ", new object[] { page - 1, para, "上一頁" })); } else { sb.Append(string.Format("<a href=/"?page={0}{1}/">{2}</a> <a href=/"?page={3}{4}/">{5}</a> ", new object[] { page - 1, para, "上一頁", page + 1, para, "下一頁" })); } break; } } sb.Append(string.Format("第{0}/{1}頁 共{2}條", 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; //總頁數 int x = page; //得到當前頁 int i; int endpage; string pageview = "", pageviewtop = ""; if (x > 1) { pageview += " <a class='pl' href='?page=1" + clinktail + "'>第1頁</a> | "; pageviewtop += " <a class='pl' href='?page=1" + clinktail + "'>第1頁</a> | "; } else { pageview += " <font color='#666666'> 第1頁 </font> | "; pageviewtop += " <font color='#666666'> 第1頁 </font> | "; } if (x > 1) { pageviewtop += " <a class='pl' href='?page=" + (x - 1) + "" + clinktail + "'>上1頁</a> "; } else { pageviewtop += " <font color='#666666'>上1頁</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頁</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頁</a> "; } else { pageviewtop += " <font color='#666666'>下1頁</font> "; } if (endpage != n) { pageview += " <a class='pl' href='?page=" + (endpage + 1) + "" + clinktail + "' class='pl' onclink='return false;'>下10頁</a> | "; } else { pageview += " | "; } if (x < n) { pageview += " <a class='pl' href='?page=" + n + "" + clinktail + "' class='pl'>第" + n + "頁</a> "; pageviewtop += " | <a class='pl' href='?page=" + n + "" + clinktail + "' class='pl'>第" + n + "頁</a> "; } else { pageview += "<font color='#666666'> 第" + n + "頁 </font>"; pageviewtop += " | <font color='#666666'> 第" + n + "頁 </font>"; } page_view.Text = pageview.ToString(); } else { page_view.Text = ""; } } //帶第一頁和最后一頁 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) { //第一頁 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: //前一頁圖片 sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=/"images/left-icon.gif/" border=/"0/"/>" })); sb.Append(string.Format("<a>上一頁</a><a href=/"?page={0}{1}/">{2}</a> ", new object[] { page + 1, para, "下一頁" })); //后一頁圖片 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) { //前一頁圖片 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>下一頁</a> ", new object[] { page - 1, para, "上一頁" })); //后一頁圖片 sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=/"images/right-icon.gif/" />" })); } else { //前一頁圖片 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, "上一頁", page + 1, para, "下一頁" })); //后一頁圖片 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; } //最后一頁圖片 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}頁/共{1}頁 共{2}條", 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) { //第一頁 sb.Append(string.Format("<a href=/"{2}?page={0}{1}/">首頁</a>", new object[] { 1, para, url })); switch (page) { case 1: //前一頁圖片 // sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=/"images/left-icon.gif/" border=/"0/"/>" })); sb.Append(string.Format("<a>上一頁</a><a href=/"{3}?page={0}{1}/">{2}</a> ", new object[] { page + 1, para, "下一頁", url })); //后一頁圖片 // 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) { //前一頁圖片 //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>下一頁</a> ", new object[] { page - 1, para, "上一頁", url })); //后一頁圖片 //sb.Append(string.Format("<a>{0}</a>", new object[] { "<img src=/"images/right-icon.gif/" />" })); } else { //前一頁圖片 //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, "上一頁", page + 1, para, "下一頁", url })); //后一頁圖片 //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; } //最后一頁圖片 sb.Append(string.Format("<a href=/"{2}?page={0}{1}/">末頁</a> ", new object[] { sumpage, para, url })); } sb.Append(string.Format("第{0}頁/共{1}頁 共{2}條", new object[] { page, sumpage, count })); } return sb.ToString(); } #endregion #region 日期格式判斷 /// <summary> /// 日期格式字符串判斷 /// </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 是否由特定字符組成 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 檢查輸入的參數是不是某些定義好的特殊字符：這個方法目前用于密碼輸入的安全檢查 /// <summary> /// 檢查輸入的參數是不是某些定義好的特殊字符：這個方法目前用于密碼輸入的安全檢查 /// </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 }}希望本文所述對大家的C#程序設計有所幫助。
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