试试这个：

 ^ [a-zA-Z] +（\s + [a-zA-Z] +）* 

hello every one i need a validation that can only validate to character and white space.. no mater how much space and character in textbox

i use this regex validation below. but it`s only allow one space between two words but don`t allow the third space for third word

([A-Za-z])+( [A-Za-z]+)

Try this:

^[a-zA-Z]+(\s+[a-zA-Z]+)*