Problem in selecting the ListBox selectedindex in ASP.Net:

Question

I have one ListBox which has three Items in it. And also has one GridView and One Button.

I want to move the selected items in the listbox to the GridView when the Button is clicked.

Now the problem is, if I selects the third item in the listbox and clicks the button, It always moves the first item in the ListBox to the GridView.

How to solve this?

    <asp:ListBox ID="lbDrawing" runat="server" AutoPostBack="false" Height="260px"  TabIndex="12" Width="150px"></asp:ListBox>

In the Button click event, I select the item by the following C# code,

string itemsname = lbDrawing.Items[lbDrawing.SelectedIndex].Text;

Anyone please help me.

Here, I fill the ListBox based the DropDownList SelectedIndex Changed Event. So I can not bind the ListBox in the Page is not PostBack Block.

@Mitul: No, I havent tried. On which basis I have to do loop? — thevan
– thevan, Commented Mar 19, 2011 at 6:27

amit_g · Accepted Answer · 2011-03-19 06:08:28Z

2

Looks like that the listbox is being bound even in the postback. Check and make sure that the DataBind of the listbox is within the if (!IsPostBack) {} block.

answered Mar 19, 2011 at 6:08

amit_g

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1 Comment

thevan Over a year ago

actually I am filling the listbox in the DropDownList selectedindex changed event. So i can not place it inside the Not Post Back block.

Mitul · Accepted Answer · 2011-03-19 06:58:53Z

0

Check this out.

protected void Button1_Click(object sender, EventArgs e)
    {


        foreach (ListItem lst in ListBox1.Items)
        {
            if (lst.Selected)
            {
                //TODO: Apply checked logic here.
            }

        }

    }

answered Mar 19, 2011 at 6:58

Mitul

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1 Comment

IAbstract Over a year ago

You could use the SelectedItems property of the ListBox. Using the collection will eliminate the requirement for an if-block.

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