forum

home / developersection / forums / why link button does not fire click event on first time click when add dynamicly?

Ask Question

Why link button does not fire click event on first time click when add dynamicly?

Anonymous User 2027 06-Oct-2014
I am dynamically adding Link Buttons to my Gridview as seen below:
protected void addLinks()
        {
            foreach (GridViewRow gvr in gvData.Rows)
            {
                if (gvr.RowType == DataControlRowType.DataRow)
                {
                    string itemNbr =
gvr.Cells[1].Text;
                    LinkButton lb = new LinkButton();
                    lb.Text = itemNbr;
                    lb.Click +=
genericLinkButton_Click;
                    foreach (Control ctrl in gvr.Cells[1].Controls)
                    {
                       
gvr.Cells[1].Controls.Remove(ctrl);
                    }
                   
gvr.Cells[1].Controls.Add(lb);
                }
            }
        }

This addLinks() function is called in my gridview_RowDataBound event and the Page Load event if(isPostPack).

The problem is that when I click the link buttons, the genericLinkButton_Click event does not get fired on my first click. It causes a postback, and then if I click it again, or click one of the other Link Buttons, the genericLinkButton_Click event is fired.

How can I make sure the click event happens on my first click?

c# c#  asp.net 
Updated on 06-Oct-2014
Anonymous User

Other

I am a content writter !

Message
Can you answer this question?
Answer

1 Answers

Anonymous User

Anonymous User

06-Oct-2014
When using Webforms and dynamically creating controls you are required to assign an ID to the created control before adding the control to the tree in order for them to work properly. Otherwise they will have changing ID's during the pagelifecycle resulting in the described behaviour.
private int _runningIndex = 0;
        protected void gvData_RowCreated(Object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                string itemNbr = e.Row.Cells[1].Text;
                LinkButton lb = new LinkButton();
                lb.ID = "btn" + (_runningIndex++).ToString();
                lb.Text = itemNbr;
                lb.Click += genericLinkButton_Click;
                foreach (Control ctrl in e.Row.Cells[1].Controls)
                {
                    e.Row.Cells[1].Controls.Remove(ctrl);
                }
                e.Row.Cells[1].Controls.Add(lb);
            }
        }
MindStick Training
MindStick Training

Liked By

We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy