When to use EnableViewState = "true" ?

Question

Dear experts I would like to know when to use EnableViewState = true..cos here are two lines of codes but only supplier is using and Category is not. ddlSupplier runat= server onSelectedIndexChanged = ddlSupplier_SelectedIndexChanged EnableViewState = true AutoPostBack = True > ddlCategory runat= server OnSelectedIndexChanged= ddlCategory_SelectedIndexChanged AutoPostBack= True > tks.

Gowtham K · Answer

Hi Karen It is used to save the user input on the form across the postback Please refer below links http://stackoverflow.com/questions/5485850/minimizing-viewstate-confused-by-enableviewstate-and-viewstatemode-in-asp-n http://www.careerride.com/ASP-purpose-of-EnableViewState-property.aspx