copy from one drpdown to another one by one

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i have two dropdowns dr1,dr2 and a button. dr1 contains items. i want that when i select an item from dr1 and click on button so that selected item must be coppied into dr2. when i select item2 from dr1 and press the button again it copies that item into dr2. i have used a code but i doesnt work and gives and error. can somebody tell me what i need to do.

C#

protected void Button1_Click(object sender, EventArgs e)
    {
        DropDownList2.Items.Add(DropDownList1.SelectedItem);

    }

Posted 5-Aug-11 6:57am

saifullahiit

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walterhevedeich 5-Aug-11 13:03pm

What is the error?

saifullahiit 5-Aug-11 13:06pm

Cannot have multiple items selected in a DropDownList.

2 solutions

Solution 2

You can look at that article on CP;

Multi select Dropdown list in ASP.NET[^]

This will help you select multiple items from a drop down. If you do not want to use this, instead you can use a listbox.
Good luck.

Posted 5-Aug-11 7:14am

Orcun Iyigun

Updated 5-Aug-11 7:16am

v3

Comments

#realJSOP 5-Aug-11 13:16pm

He didn't say that he wanted multiple items selected. I think the problem is that the act of adding the SelectedItem causes the 2nd dropdown to think there's more than one selected.

Orcun Iyigun 5-Aug-11 14:53pm

Well I think you are right. I am kinda misleaded because of his comment saying "Cannot have multiple items selected in a DropDownList."

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#realJSOP · Accepted Answer · 2011-08-05T07:13:00

Solution 1

Try this:

C#

DropDownList2.Items.Add(DropDownList1.Items[DropDownList1.SelectedIndex]);

You *might* need to do this first:

C#

DropDownList2.SelectedIndex = -1;

Posted 5-Aug-11 7:13am

#realJSOP

Updated 5-Aug-11 7:15am

v3

Comments

Mr.Sourav.Maitra 5-Aug-11 14:56pm

SelectedIndex will store the Index value. This is not the exact probem what he mentioned