File Stream/Stream response in AJAX Update Panel

Last few months, I got a problem to place a button to generate a CSV file in the update panel. I was having a problem related with response error. So what i did was to place the button outside the Update Panel. Today, I found a simple solution to place this button inside the AJAX Update panel

1. You need to set the page mode on the page load event

protected void Page_Load(object sender, EventArgs e)
    this.Page.Form.Enctype = "multipart/form-data";

2. set the update Panel Children as trigger to true

3. set the trigger to your button


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