ASP dropdownlist1（如果选择）将列表添加到另一个dropdownlist2 [英] ASP dropdownlist1 if selected add list to another dropdownlist2

问题描述

亲爱的exprt，

以下代码无效，你能不能协助。

below code is not working, can you assist.

我正在尝试从dropdownlist1中选择dropdownlist2中的列表

I'm trying to add list in dropdownlist2 in selection from dropdownlist1

protected void DDList1_SelectedIndexChanged（object sender，EventArgs e）

        {

protected void DDList1_SelectedIndexChanged(object sender, EventArgs e)
        {

           

            if（DDList1.SelectedValue ==" 1"）

               {

           
            if (DDList1.SelectedValue == "1")
               {

       

                   DDList2.Items.Add（new ListItem（" Ground Floor"，" 0"））;;
                    DDList2.Items.Add（new ListItem（" 1st Floor"，" 1"））;;
             

                 


               }

       
                   DDList2.Items.Add(new ListItem("Ground Floor", "0"));
                   DDList2.Items.Add(new ListItem("1st Floor", "1"));
            
                 
               }

              

              

        }

        }

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