This code sample demonstrates a script component which is used to get a file name from the user. The script component combines both a client invocation usage and raising events to provide information about the user feedback.

The code does the following:

1. Creating a custom control named MyScript which inherits from the Gizmox.WebGUI.Forms.Component class.
2. Adding a script in the same namespace as the new component with the same name but with an exstention of js (This is created by default if you create a new custom WebGUI control).
3. Making the previous resource embedded resource so the VWG server could find it.
4. To make the VWG server look for the component resources you have to register it in the web config under the controls section (see the sample's web.config for the exact format).
5. After compiling you can see the control in the toolbox and you can drag the component to the design surface. This will create the component in the InitializeComponents generated method.
6. In the embedded script component there is a method called MyScripts_GetFileName which we want to invoke on the client. We are doing it within the SelectFile method by calling client invocation using the InvokeMethodWithId service which calls the client method and by default sends the id as the first argument (We need to send the ID so we can do a callback to the server side code from the client code).
7. The client side MyScripts_GetFileName method creates a file input control and gets a path from the user. When this process is done we are raising an event to the server side code by using the event services (See the MyScripts_FileNameSelected method).
8. The server side component (MyScript) will recieve the event in the by overriding FireEvent method and handling an event called FileSelected which is the name we choose for this event in the client side code.
9. To enable callbacking the server side component we need to register the component and that is the way you see the register code. When creating a self registering component you should unregister the component your self. This part is missing but you can do it in the form close method...
 

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