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Drop down list Not Binding on Visible false

Posted By:      Posted Date: October 10, 2010    Points: 0   Category :ASP.Net

Hello i have a textbox1 and drop down list 1

i am filling drop downlist from Sql datasource

and  textbox1.text=Dropdownlist1.SelectedItem.Value.ToString()

all working fine

but if i set dropdownlist1.visible = false  than  textbox1.text = empty string

I need to hide the dropdownlist1 and in the same time i need the selecteditem of dropdownlist   to be in the Textbox1.text

please help me

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