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{112}|(\d{112}\.{1}\d{13}){1})$); return !objAlphaNumericPattern.IsMatch(strToCheck); } public static bool IsAmountBECost(String strToCheck) { Regex objAmountPattern = new Regex(@^(\d{18}|(\d{18}\.{1}\d{13}){1})$); 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]{24})$); return !objEmailPattern.IsMatch(strToCheck); }