Set Flash Variables in ASP.NET

1. Key Concepts

1. Purpose

ASPNetFlash Flash Variables allow you to send text, HTML markup, or other basic data into your Flash Movie quickly and easily.  In this tutorial we will be defining the variables Title and URL. They will be injected into the Flash Movie by the WebControl, and Flash will read them and use them to display a link with the text Title directed to the URL.

2. Usage

There are several ways to set the Flash Variables, and they occur at different times during the WebControl's lifecycle.

i. Set Flash Variables Statically

You can create static Flash Variable definitions using either the Properties Panel, the Designer Smart Tags (Visual Studio 2005 users only), or by directly manipulating the ASPX tags of your WebControl instance. In the end, all three ways generate Flash Variable tags in the source code of the ASPNetFlash WebControl.  

ii.  Set Flash Variables Programmatically

You can add, modify or remove FlashVariables programmatically by editing the FlashVariables collection object. If your ASPNetFlash object was named Flash1, you could set or modify a named Flash Variable using the following series of code snippets:

[C#]
//To set a named variable to a value, you can use the following code (Visual Studio 2005 only):Flash1.FlashVariables["NAME"] = "VALUE";//In Visual Studio 2002/2003, you can use this code:Flash1.FlashVariables.SetValueByName("NAME", "VALUE");//You can retrieve values using the same construct, ie (Visual Studio 2005 only):string value = Flash1.FlashVariables["NAME"];//In Visual Studio 2002/2003, you can use this code:string value = Flash1.FlashVariables.GetValueByName("NAME");//You can also cycle through all FlashVariables using code such as this: foreach (FlashVariable flashVar in Flash1.FlashVariables){Response.Write("Name: " + flashVar.Name + " Value: " + flashVar.Value + "<br />");}

[Visual Basic]
//To set a named variable to a value, you can use the following code:Flash1.FlashVariables.SetValueByName("NAME", "VALUE")//You can retrieve values using this code:Dim value As Stringvalue = Flash1.FlashVariables.GetValueByName("NAME")//You can also cycle through all FlashVariables using code such as this: Dim flashVar As ASPNetFlash.FlashVariableFor Each flashVar In Flash1.FlashVariablesResponse.Write("Name: " & flashVar.Name & " Value: " & flashVar.Value & "<br />")Next 

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