if condition for Selected Item from DropDownList

HI

I have one dropdownList=DDLtradeO  and one button=btnsubmit  In Admin.aspx page

and  I have House_info table that one of column's is T_name

here I want if users select State from DDLtradeO , in House_info table in T_name column insert "STATE"

and if users select other Item from DDLtradeO  in T_name column insert "STORE"

so in behind code I wrote below code

    protected void btnsubmit(object sender, ImageClickEventArgs e)
    {
 string T_name = DDLtradeO.Text == "State"?"State":"Store"
        SqlCommand _cmd = new SqlCommand("registerspecial", _cn);
        _cmd.CommandType = CommandType.StoredProcedure;
        _cn.Open();
      
        _cmd.Parameters.AddWithValue("@T_name", T_name);
_cn.close();
}

but here when I click on State Item or Other Item from DDLtradeO in both case it insert "STORE" in table

how I can SOlve this problem?

Thanks alot