curly brackets in url will not pass through validation vb.net -

I have this URL, {zip}. I need {zip}, because in my code, when this page opens, I call {zip} 10001 with a zipcode. But in ASPX, when I used to verify for that textbox, it does not pass {} nearby. This is validation - Validation Exercise = "http: // ([\ w-] +.) + [\ W-] + (/ [\ w- ./?%&=]*]?" Regularexpressionvalidator How do I get curly brackets in SQL Server?

I do not know validation expression but this is just Looks like a regex so you can not add = {zip} at the end of the bus?

  validationxpress = "http: // ([\ W -] +.) + [\ W -] + (/ [\ w- ./?%&=$*]? = {Zip} "