C# Web App: Creating labels from drop down list selection

[dmj07]

Hi all,

I would like to know a way to add a label to an update panel by using a drop down list selected item.

For example:

There is a list of items in a drop down list, the user selects one then presses the add button next to it and it creates a label in a table next to it.

Here is the code I have at the moment:

protected void btAdd_Click(object sender, EventArgs e)
    {
        Label lblSelected = new Label();
        lblSelected.Text = ddlAdd.SelectedItem.Text;
        ddlAddingSales.Items.Remove(ddlAdd.SelectedItem);
        UpdatePanel.ContentTemplateContainer.Controls.Add(lblSelected);
    }

Of course with this way though it just keeps writing over the previously created label :(

Many thanks in advance.

[Frinavale]

Why don't you just append to the existing label instead of creating a whole bunch of controls that are not needed? This would reduce page bloat.

-Frinny

[dmj07]

I don't understand what you mean, if you mean append to a label already on the webform then I dont have one because I want to dynamically creat them without full page postback. If you could provide me any sample code to show me what you mean that would be helpful.

Many thanks

[Frinavale]

Check out the article on how to use dynamic controls in ASP.NET. It should help you understand how to do want you want.

-Frinny

[dmj07]

Thankyou very much for your help. Although the page was very helpful I need to load the created labels into a update panel inside a modal popup box. I will keep trying though.

Many thanks again.

[Frinavale]

Thankyou very much for your help. Although the page was very helpful I need to load the created labels into a update panel inside a modal popup box. I will keep trying though.

Many thanks again.

A Modal pop up box? As in a JavaScript Alert Box?
Labels are .NET controls......a lert boxes are JavaScript and only display text.

You could keep track of the items selected and add them to a String ... you can then add to a JavaScript call that makes an alert box with the string containing the selected items.

-Frinny