using System.Text.RegularExpressions;

#region 驗證輸入的字符串
??? /// <summary>
??? /// 判斷輸入的字符類型　
??? /// </summary>
??? /// <param name="_value">輸入的字串</param>
??? /// <param name="_kind">要驗證的類型</param>
??? /// 1: 由26個英文字母組成的字串
??? /// 2: 正整數
??? /// 3: 非負整數（正整數 + 0)
??? /// 4: 非正整數（負整數 + 0）
??? /// 5: 負整數
??? /// 6: 整數
??? /// 7: 非負浮點數（正浮點數 + 0）
??? /// 8: 正浮點數
??? /// 9: 非正浮點數（負浮點數 + 0)
??? /// 10: 負浮點數
??? /// 11: 浮點數
??? /// 12: 由26個英文字母的大寫組成的字串
??? /// 13: 由26個英文字母的小寫組成的字串
??? /// 14: 由數位和26個英文字母組成的字串
??? /// 15: 由數位、26個英文字母或者下劃線組成的字串
??? /// 16: Email
??? /// 17: URL
??? /// 18: 只能輸入入中文
??? /// 19:
??? /// </param>
??? /// <returns>true是驗証通過,false是驗証錯誤</returns>
??? /// <returns></returns>

??? public? bool ValidateUserInput(String _value, int _kind)
??? {
??????? string RegularExpressions = null;

??????? switch (_kind)
??????? {
??????????? case 1:
??????????????? //由26個英文字母組成的字串
??????????????? RegularExpressions = "^[A-Za-z]+$";
??????????????? break;
??????????? case 2:
??????????????? //正整數
??????????????? RegularExpressions = "^[0-9]*[1-9][0-9]*$";
??????????????? break;
??????????? case 3:
??????????????? //非負整數（正整數 + 0)
??????????????? RegularExpressions = "^\\d+$";
??????????????? break;
??????????? case 4:
??????????????? //非正整數（負整數 + 0）
??????????????? RegularExpressions = "^((-\\d+)|(0+))$";
??????????????? break;
??????????? case 5:
??????????????? //負整數
??????????????? RegularExpressions = "^-[0-9]*[1-9][0-9]*$";
??????????????? break;
??????????? case 6:
??????????????? //整數
??????????????? RegularExpressions = "^-?\\d+$";
??????????????? break;
??????????? case 7:
??????????????? //非負浮點數（正浮點數 + 0）
??????????????? RegularExpressions = "^\\d+(\\.\\d+)?$";
??????????????? break;
??????????? case 8:
??????????????? //正浮點數
??????????????? RegularExpressions = "^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$";
??????????????? break;
??????????? case 9:
??????????????? //非正浮點數（負浮點數 + 0）
??????????????? RegularExpressions = "^((-\\d+(\\.\\d+)?)|(0+(\\.0+)?))$";
??????????????? break;
??????????? case 10:
??????????????? //負浮點數
??????????????? RegularExpressions = "^(-(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*)))$";
??????????????? break;
??????????? case 11:
??????????????? //浮點數
??????????????? RegularExpressions = "^(-?\\d+)(\\.\\d+)?$";
??????????????? break;
??????????? case 12:
??????????????? //由26個英文字母的大寫組成的字串
??????????????? RegularExpressions = "^[A-Z]+$";
??????????????? break;
??????????? case 13:
??????????????? //由26個英文字母的小寫組成的字串
??????????????? RegularExpressions = "^[a-z]+$";
??????????????? break;
??????????? case 14:
??????????????? //由數位和26個英文字母組成的字串
??????????????? RegularExpressions = "^[A-Za-z0-9]+$";
??????????????? break;
??????????? case 15:
??????????????? //由數位、26個英文字母或者下劃線組成的字串
??????????????? RegularExpressions = "^[0-9a-zA-Z_]+$";
??????????????? break;
??????????? case 16:
??????????????? //email地址
??????????????? RegularExpressions = "\\w+([-+.']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";
??????????????? break;
??????????? case 17:
??????????????? //url
??????????????? RegularExpressions = "^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$";
??????????????? break;
??????????? case 18:
??????????????? //只能輸入中文
??????????????? RegularExpressions = "^[^\u4E00-\u9FA5]";
??????????????? break;
??????????? case 19:
??????????????? //只能輸入0和非0打頭的數字
??????????????? RegularExpressions = "^(0|[1-9][0-9]*)$";
??????????????? break;
??????????? case 20:
??????????????? //只能輸入數字
??????????????? RegularExpressions = "^[0-9]*$";
??????????????? break;
??????????? case 21:
??????????????? //只能輸入數字加2位小數
??????????????? RegularExpressions = "^[0-9]+(.[0-9]{1,2})?$";
??????????????? break;
??????????? case 22:
??????????????? //只能輸入0和非0打頭的數字加2位小數
??????????????? RegularExpressions = "^(0|[1-9]+)(.[0-9]{1,2})?$";
??????????????? break;
??????????? case 23:
??????????????? //只能輸入0和非0打頭的數字加2位小數? 但不匹配0.00
??????????????? RegularExpressions = "^(0(.(0[1-9]|[1-9][0-9]))?|[1-9]+(.[0-9]{1,2})?)$";
??????????????? break;
??????????? default:
??????????????? break;
??????? }

??????? Match m = Regex.Match(_value, RegularExpressions);

??????? if (m.Success)
??????????? return true;
??????? else
??????????? return false;

??? }
??? #endregion?

總結

以上是生活随笔為你收集整理的c#結合正則表達式驗證輸入的字符串的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。