Asp – need to copy files on client system, is thr any possible way

asp.net

I m developin an Online Examination System in C#.net and want to copy files on client machine as soon as exam starts, so that even if internet gets disconnected examinee can continue with test

Best Answer

You may wish to consider a client server solution, such as WPF or winforms as this is more suited to this type of development. You can use one click deployment to have this still launched from the web and updated on every run.

If you do decied to use asp.net this will result in a very javascript heavy site with a very slow load in the first page.

To do this you would load all your test qustions into a javascript datastructure on the first page, when every the user when to the next page you would need to, using javascript, collect all the answers and store in javascript. then rereender the entire page using your definitions of the test in javascript with no trip back to the server. then once the test was complete you would need to send your results back to the server, the internet must be active once you've compleated the test.

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Asp.net-mvc – Can an ASP.NET MVC controller return an Image

Use the base controllers File method.

public ActionResult Image(string id)
{
    var dir = Server.MapPath("/Images");
    var path = Path.Combine(dir, id + ".jpg"); //validate the path for security or use other means to generate the path.
    return base.File(path, "image/jpeg");
}

As a note, this seems to be fairly efficient. I did a test where I requested the image through the controller (http://localhost/MyController/Image/MyImage) and through the direct URL (http://localhost/Images/MyImage.jpg) and the results were:

MVC: 7.6 milliseconds per photo
Direct: 6.7 milliseconds per photo

Note: this is the average time of a request. The average was calculated by making thousands of requests on the local machine, so the totals should not include network latency or bandwidth issues.

Javascript – Change the selected value of a drop-down list with jQuery

jQuery's documentation states:

[jQuery.val] checks, or selects, all the radio buttons, checkboxes, and select options that match the set of values.

This behavior is in jQuery versions 1.2 and above.

You most likely want this:

$("._statusDDL").val('2');

Best Answer

Related Solutions

Asp.net-mvc – Can an ASP.NET MVC controller return an Image

Javascript – Change the selected value of a drop-down list with jQuery

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