Working with dropdownlist

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<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
        <asp:ListItem>--select university--</asp:ListItem>
        <asp:ListItem Value="1">MIT</asp:ListItem>
        <asp:ListItem Value="2">Oxford</asp:ListItem>
        <asp:ListItem Value="3">Melbourne</asp:ListItem>
    </asp:DropDownList>
    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True">
        <asp:ListItem>--select country--</asp:ListItem>
        <asp:ListItem Value="1">USA</asp:ListItem>
        <asp:ListItem Value="2">UK</asp:ListItem>
        <asp:ListItem Value="3">Australia</asp:ListItem>
    </asp:DropDownList>
    <asp:DropDownList ID="DropDownList3" runat="server" AutoPostBack="True">
        <asp:ListItem>--select continent--</asp:ListItem>
        <asp:ListItem Value="1">America</asp:ListItem>
        <asp:ListItem Value="2">Europe</asp:ListItem>
        <asp:ListItem Value="3">Asia</asp:ListItem>
    </asp:DropDownList>

QUESTION
How can I code in the back-end such that when "MIT" is selected in dropdownlist1, "USA" and "America" are automatically selected in dropdownlist2 and dropdownlist3 respectively. likewise to "Oxford" and "Melbourne".

Thank you.

Posted 16-Aug-15 19:55pm

Member 11911171

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Abhinav S · Answer 1 · 2015-08-16T20:04:00

Solution 1

What you need is a cascading dropdown -
Cascading Dropdown in ASP.Net[^]
Populate Cascading DropDownList On Selection ASP.NET[^]

Posted 16-Aug-15 20:04pm

Abhinav S

Comments

Member 11911171 17-Aug-15 2:59am

Thanks Abhinav, but how can I code it such that selections in dropdown2 and 3 are automatically done when I make a selection in dropdown1...I am looking not to necessarily scroll the dropdownlist2 and 3. Thanks.

Shwetha, India · Answer 2 · 2015-08-17T01:59:00

As per my assumption if this data is static data then you can do like this way.

first Create an selected_indexchanged event for dropdown list1.

In That method you can do like this

C#

Public void dropdownlist1_SelectedIndexChanged(object sender, EventArgs e)
    {
if(dropdownlist1.selectedIndex!=0)
{
dropdownlist2.selectedIndex= dropdownlist3.selectedIndex=dropdownlist1.selectedIndex;
}

Try this once :)