ASP.NET: adding controls client-side

Question

If I have a page with a form (imagine a simple one with just TextBoxes and a submit button) and I want to allow the user to dynamiccally add more TextBoxes to the form via j

Answer 1

I have done similiar things to this numerous times. My preferred approach is usually to use a Repeater and a Button (labelled Add) inside an UpdatePanel.

For the Button_OnClick event in your code behind do something similiar to this;

 Loop through the Items collection of the Repeater
 Use item.FindControl("txtUserInput") to get the TextBox for that item
 Save the text of each input to List 
 Add an empty string to the the list
 Databind the repeater to this new list

Here's some example code;

    
        
     




protected void btnAddAttendee_Click(object sender, EventArgs e)
{
    var attendees = new List();

    foreach (RepeaterItem item in rptAttendees.Items)
    {
        TextBox txtAttendeeEmail = (TextBox)item.FindControl("txtAttendeeEmail");
        attendees.Add(txtAttendeeEmail.Text);
    }

    SaveAttendees();
    attendees.Add("");
    rptAttendees.DataSource = attendees;
    rptAttendees.DataBind();
}