Pass Additional parameters to uploadify using JQuery and ASP.Net

modit says:but what if i have a textbox in the page and i want to call the value in the web handler, how can i achieve that?

Can you elaborate more on this. What you actually want to achieve?

while uploading images i have a textbox that takes some value which will be stored in the database along with images location in the database. i am able to save the image location in the database from the web handler but i am not able to pass the textbox value to the handler.

You can add a setting

'scriptData':{fileId:$("#FileId").val()}

Then in code

string fileId = context.Request.QueryStrinf["fileId"];

thank you, working perfect