selected dropdownlist item name cannot visible in the other dropdown

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Suppose I have three DropDownLists each with the items: A, B,C,D and E.these are retriving from table data. If I selected item D from the DropDownList 2, then DropDownList1 and 3 will show the items A, B, C and E only, since my code works to remove / disable the selected item from the other DropDownLists.and i want to add Select option for all dropdownlist, if i click on that it wont go 'select' option. Any idea? Please help.

Thank You

Posted 22-Dec-14 18:15pm

sharat naik

Updated 22-Dec-14 20:08pm

v4

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Anisuzzaman Sumon 23-Dec-14 0:38am

This is not a good question however give some part of your code .

syed shanu 23-Dec-14 1:20am

But why do you have same data in 3 dropdownlist

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Praveen Kumar Upadhyay · Accepted Answer · 2014-12-22T19:22:00

Check below peace of code. It might help you.

Let's say we have 3 dorpdown.

XML

<asp:DropDownList ID="DropDownList1" runat="server" Width="150px"
            AutoPostBack="True" onselectedindexchanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem>a</asp:ListItem>
            <asp:ListItem>b</asp:ListItem>
            <asp:ListItem>c</asp:ListItem>
            <asp:ListItem>1</asp:ListItem>
            <asp:ListItem>2</asp:ListItem>
            <asp:ListItem>3</asp:ListItem>
            <asp:ListItem></asp:ListItem>
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList2" runat="server" Width="150px"
            AutoPostBack="True" onselectedindexchanged="DropDownList2_SelectedIndexChanged">
            <asp:ListItem>a</asp:ListItem>
            <asp:ListItem>b</asp:ListItem>
            <asp:ListItem>c</asp:ListItem>
            <asp:ListItem>1</asp:ListItem>
            <asp:ListItem>2</asp:ListItem>
            <asp:ListItem>3</asp:ListItem>
            <asp:ListItem></asp:ListItem>
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList3" runat="server" Width="150px"
            AutoPostBack="True" onselectedindexchanged="DropDownList3_SelectedIndexChanged">
            <asp:ListItem>a</asp:ListItem>
            <asp:ListItem>b</asp:ListItem>
            <asp:ListItem>c</asp:ListItem>
            <asp:ListItem>1</asp:ListItem>
            <asp:ListItem>2</asp:ListItem>
            <asp:ListItem>3</asp:ListItem>
            <asp:ListItem></asp:ListItem>
        </asp:DropDownList>

Below is the code behind code.

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string item = DropDownList1.Text;
            DropDownList2.Items.Remove(item);
            DropDownList3.Items.Remove(item);
        }

        protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
        {
            string item = DropDownList2.Text;
            DropDownList1.Items.Remove(item);
            DropDownList3.Items.Remove(item);
        }

        protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
        {
            string item = DropDownList3.Text;
            //here you can bind the Dropdown and then remove the item. Do this wherever you require to do
            DropDownList1.Items.Remove(item);
            DropDownList2.Items.Remove(item);
        }

If you want to do something similar on Page Load you can do that also based on above code.