Normal text field Sanitizing Using C# (Regex Part 2)

               

1. In our daily programming as we play with form we always need a validator which can validate our text like "Names" , "School", "Organization". 
So we need to sanitize this type of input, so that it can't accept (‘@’, ‘-‘ and ‘.’:) values.

For this i have got an regex which i have posted below:

private static string removeUnwantedCharacters(String inputvalue)
{
    return Regex.Replace(inputvalue, @"[^\w\.@-]", string.Empty);
}


we can test this regex as:

 string getResult = removeUnwantedCharacters("()hi{ev??er#'y>>one<<");
…returns “hieveryone”. 



2. Many times we also have to face problem with Date correct formats.

Here's a regex which can be changed as per your format needs.
 

private static string FormatMyDate(String dateInputvalue)
{
    return Regex.Replace(dateInputvalue, "\\b(?<month>\\d{1,2})/(?<day>\\d{1,2})/(?<year>\\d{2,4})\\b" ,    "${day}-${month}-${year}");
}


Or In Clear way

using System.Text.RegularExpressions;

string datepattern = @"(?<mm>\d{2}).(?<dd>\d{2}).(?<yyyy>\d{4})";
string replaceStr = @"${yyyy}-${mm}-${dd} or ${dd}.${mm}.${yyyy}"; 

Regex myRegEx =  new Regex(datepattern); 

string datevalue = Request.Params["GetDateFromControlName"].ToString() 

string myNewDateWithPattern = datevalue.ReplaceAll(myRegEx, replaceStr);

and further we can convert our date to datetime datatype. 

this will act as same as image given below we can use this to replace all with correct format too