Question

I’m trying to learn jQuery, but it’s coming slowly as I really don’t know any JavaScript.

My site is in VB.NET and I’m putting jQuery code on both my actual .ascx UserControl and in a separate file (something like myscripts.js). This is because I’m using webforms as I still don’t know MVC well enough to implement it, so I have to get the clientID’s on the page.

What I would like to do is the following:

1. Grab text from a textbox and make it all lowercase

2. Get the username from the login info. I’ve done this like so on my actual page:

   var userName = "<%=Split(System.Web.HttpContext.Current.User.Identity.Name.ToLowerInvariant, '|')%>";
   

3. Check to see if the username is in the text. If it IS in the text, I want to set a variable to “false”, othewise to true.

How do I do this?

Answer 1

I am completely ignorant of the ASP.NET side of it, but as far as jQuery and Javascript….

To get the value of a text field, you use the jQuery function val():

var value = $('#mytextbox').val();

To turn a string to lower case, you use the string method toLowerCase():

var value = $('#mytextbox').val().toLowerCase();

Since val() returns a string we can throw that at the end.

To check if a string is within another string, you use the string method indexOf():

var needle = 'Hello';
var haystack = 'Hello World';
var match = haystack.indexOf(needle); // -1 if no matches, 0 in this case