Regular expression for digits and decimals

Question

hello frndz, i need a regular expression to accept only digits or can contain decimals. for example, it should accept 10 or 10.00 or 50.55 like that thanks in advance kumar

Sandilian Arumugam · Answer

Hai Friend this might help you. Regular Expression public bool IsNaturalNumber(String strNumber) { Regex objNotNaturalPattern = new Regex("[^0-9]"); Regex objNaturalPattern = new Regex("0*[1-9][0-9]*"); return !objNotNaturalPattern.IsMatch(strNumber) && objNaturalPattern.IsMatch(strNumber); } public bool IsWholeNumber(String strNumber) { Regex objNotWholePattern = new Regex("[^0-9]"); return !objNotWholePattern.IsMatch(strNumber); } public bool IsInteger(String strNumber) { Regex objNotIntPattern = new Regex("[^0-9-]"); Regex objIntPattern = new Regex("^-[0-9]+$|^[0-9]+$"); return !objNotIntPattern.IsMatch(strNumber) && objIntPattern.IsMatch(strNumber); } public bool IsPositiveNumber(String strNumber) { Regex objNotPositivePattern = new Regex("[^0-9.]"); Regex objPositivePattern = new Regex("^[.][0-9]+$|[0-9]*[.]*[0-9]+$"); Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*"); return !objNotPositivePattern.IsMatch(strNumber) && objPositivePattern.IsMatch(strNumber) && !objTwoDotPattern.IsMatch(strNumber); } public bool IsNumber(String strNumber) { Regex objNotNumberPattern = new Regex("[^0-9.-]"); Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*"); Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*"); String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$"; String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$"; Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")"); return !objNotNumberPattern.IsMatch(strNumber) && !objTwoDotPattern.IsMatch(strNumber) && !objTwoMinusPattern.IsMatch(strNumber) && objNumberPattern.IsMatch(strNumber); } public static bool IsAlphaNumeric(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[a-zA-Z0-9]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithSpace(String strToCheck) { Regex objAlphaNumericSpacePattern = new Regex(@"^[a-zA-Z0-9\s]*$"); return !objAlphaNumericSpacePattern.IsMatch(strToCheck); } public static bool IsNumericWithDot(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[0-9.]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsNumeric(String strToCheck) { Regex objNumericPattern = new Regex(@"^[0-9]*$"); return !objNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithDot(String strToCheck) { Regex objAlphaNumericPattern = new Regex("[^a-zA-Z0-9.]"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithDotPeriodSpace(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[a-zA-Z0-9\s.,]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithDotPeriodSpaceHyphen(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[a-zA-Z0-9\s.,-]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithDotPeriodSpaceHyphenSlash(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[a-zA-Z0-9\s.,-/]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAlphaNumericWithSlash(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^[a-zA-Z0-9/]*$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAmount(String strToCheck) { Regex objAlphaNumericPattern = new Regex(@"^(\d{1,12}|(\d{1,12}\.{1}\d{1,3}){1})$"); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAmountBECost(String strToCheck) { Regex objAmountPattern = new Regex(@"^(\d{1,8}|(\d{1,8}\.{1}\d{1,3}){1})$"); return !objAmountPattern.IsMatch(strToCheck); } public static bool IsValidMail(String strToCheck) { Regex objEmailPattern = new Regex(@"^[a-z0-9A-Z_\+-.]+(\.[a-z0-9A-Z_\+-.]+)*@[a-z0-9A-Z-]+(\.[a-z0-9A-Z-]+)*\.([a-zA-Z]{2,4})$"); return !objEmailPattern.IsMatch(strToCheck); }

Regular expression for digits and decimals

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