Getting C# Method With jQuery in asp.net

Question

I am using the code below to display an uploaded picture in asp.net . The Image name is change to a unique name and args.get_fileName retrieves the original name of the file instead of the new unique name.

How can I retrieve the new unique name:

protected void FileUploadComplete(object sender, EventArgs e)
{
    var date = DateTime.Now.ToString("yyyy-MM-dd-hh_mm_ss");
    string filename = System.IO.Path.GetFileName(AsyncFileUpload1.FileName);
    AsyncFileUpload1.SaveAs("~/listingImages/" + date + filename);
}

Script:

function uploadStarted() {
    $get("imgDisplay").style.display = "none";
}

function uploadComplete(sender, args) {
    var imgDisplay = $get("imgDisplay");
    imgDisplay.src = "images/loader.gif";
    imgDisplay.style.cssText = "";
    var img = new Image();
    img.onload = function () {
        imgDisplay.style.cssText = "height:100px;width:100px";
        imgDisplay.src = img.src;
    };

    img.src = "/listingImages/" + args.get_fileName();

    $('#bodyContent_Label1').html("/listingImages/" + args.get_fileName());
}

Could you just pass the filename into the view via a viewmodel? — Canvas
– Canvas, Commented Aug 10, 2015 at 9:09
@Canvas thank you for reply. I am new to asp.net and not sure of how i will do this. Thanks — Michh
– Michh, Commented Aug 10, 2015 at 10:14

Rahul Dubey · Accepted Answer · 2015-08-11 11:23:56Z

1

You should use password generating concept

private static string CreateRandomPassword(int passwordLength)
{
 string allowedChars = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789!@$?_-";
 char[] chars = new char[passwordLength];
 Random rd = new Random();

 for (int i = 0; i < passwordLength; i++)
 {
  chars[i] = allowedChars[rd.Next(0, allowedChars.Length)];
 }

 return new string(chars);
}

edited Aug 11, 2015 at 11:23

Rahul Dubey

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answered Aug 10, 2015 at 9:45

Sandip_JACK

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6 Comments

Michh Over a year ago

thanks, i am really new to asp.net and have no idea how to inpelment this concept with my exciting code

Sandip_JACK Over a year ago

you know about AJAX ??

Sandip_JACK Over a year ago

You can call CreateRandomPassword() function using AJAX and you will easily get return value as unique string

Rahul Dubey Over a year ago

What should be lenth of my randomly generated string?

Sandip_JACK Over a year ago

Fist of all that fellow want unique string, so we can use CreateRandomPassword Method. Than Random function will give integer number randomly so we can use allowedChars[rd.Next(0, allowedChars.Length)]; for creating unique string.

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