ASP.NET - Referencing a control inside of a user control

ASP.NET Mini Tutorial - Referencing a control inside of a user control

Let's say you have a usercontrol that contains a dropdown list of states that you use across many pages. In the codebehind of the page, you will likely need to reference that dropdown list, but it's nested inside a usercontrol, so you must use the FindControl method to access it.

Example:

First, create a new object called ddlState and make it a dropdownlist
Dim ddlState As DropDownList = StatesDropDown1.FindControl("ddlState")

Now you can reference it just like it was a control on the page:
txtExample.text = ddlState.SelectedValue

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