ASP.Net – How to pass the from your ASP.Net application as a parameter via the client side of your aspx page to a flash program

Say you want to restrict access to your flash application that is called by your aspx page. That is easy enough by adding the aspx page to your your web.config file’s location/authorization section. But what if you want to pass the user that is logged on to your ASP.Net application via the¬†authentication¬†process?

Here is how to pass a parameter called UserName to your flash application using the param name tag in your html of your aspx page.

<param name="FlashVars" value="UserName=&lt;% Response.Write(UCASE(User.Identity.Name)) %>" />

User.Identity.Name contains the user logged into your ASP.Net application. Response.Write is the method to use to place the user into the value property of your parameter.

You can then use the following logic in your flash application to read in the UserName parameter:

var paramUserName:String;
var flashVars:Object = LoaderInfo(this.root.loaderInfo).parameters;
paramUserName = flashVars.UserName;

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