It drops the students table. The original code in the school’s program probably looks something like This is the naive way to add text input into a query, and is very bad, as you will see. After the values from the first name, middle name textbox FNMName.Text (which is Robert’); DROP TABLE STUDENTS; –) and the last name textbox LName.Text (let’s … Read more
I need to validate just one field (called ‘Instance’) to accept lowercase ASCII letters and numbers only, the first character also has to be a letter not a number. It will accept uppercase characters but we will need it to lowercase them on input. So if someone uses the instance name McDonalds it will be … Read more
You could use the submitHandler option. Basically put the $.ajax call inside this handler, i.e. invert it with the validation setup logic. The jQuery.validate plugin will invoke the submit handler if the validation has passed.
The shortest valid email address may consist of only two parts: name and domain. name@domain Since both the name and domain may have the length of 1 character, the minimal total length resolves to 3 characters.
Brad Wilson has a couple great articles on unobtrusive validation and unobtrusive ajax.It is also shown very nicely in this Pluralsight video in the section on ” AJAX and JavaScript”. Basically, it is simply Javascript validation that doesn’t pollute your source code with its own validation code. This is done by making use of data- attributes in HTML.
You can use string.indexOf(‘a’). If the char a is present in string : it returns the the index of the first occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.
Possibly it’s because: Is between your closing head tag and opening body tag. I.e. lines 81-87
2nd October 2020: note that many bare-bones approaches are fraught with subtle bugs (eg. whitespace, implicit partial parsing, radix, coercion of arrays etc.) that many of the answers here fail to take into account. The following implementation might work for you, but note that it does not cater for number separators other than the decimal … Read more
You don’t need the date validator. It doesn’t support dd/mm/yyyy format, and that’s why you are getting “Please enter a valid date” message for input like 13/01/2014. You already have the dateITA validator, which uses dd/mm/yyyy format as you need. Just like the date validator, your code for dateGreaterThan and dateLessThan calls new Date for … Read more
This issue occurs on Chrome if a form field fails validation, but due to the respective invalid control not being focusable the browser’s attempt to display the message “Please fill out this field” next to it fails as well. A form control may not be focusable at the time validation is triggered for several reasons. The two … Read more