Drawing lines on C Sharp web application

[poifull]

Hi,

Does anyone out there knows how to draw lines with mouse on a C Sharp web application? I only found window application codes on Google. I need guidance. Please provide me with sample full source code if can. Thanks!

[Plater]

You're going to need to make heavy use of javascript I would say. (Unless you plan on making like a silverlight/activeX application)
Find yourself a good javascript drawing library, then work with the mousemove and mouseclick events to support your drawing.

[poifull]

thanks for your reply. i'm new to C#. how do i use javascript in C#?

[Plater]

You use javascript on the webpage. The C# code only runs on the server, not on the client

[poifull]

can javascript get image dpi?

[Plater]

I do not know exactly what you are refering to (height and width? yes)
But any values you want, you could read in the C# backend code and write to hidden input fields in your page, then access them in javascript to use for the drawing