I have a textbox to accept string.
I want to put a validation in that like, if character
X is there in string it should be at last, not in the middle. But
X can repeat many times. A string may have 5
X or 10
X, but all
X must be at last not in the middle of string.
testingxxxx This is correct string because all
X are at last.
test_x_ingxxxxx This is Invalid because
X is in between the string.
testX This is Valid because
X at last
XtestXXXX This is Invalid because
X at starting position.