asp.net add link button dynamically click function

Question

I'm trying to add a LinkButton dynamically

This is the html code:

         <div id="resultDivText" runat="server">
            <asp:PlaceHolder ID="PlaceHolder1" runat="server">

            </asp:PlaceHolder>
        </div>

This is the c# code

            LinkButton lb = new LinkButton();
            lb.Text = songName + "</br>"; //LinkButton Text
            lb.ID = song.Key.ToString(); // LinkButton ID’s
            lb.CommandArgument = Convert.ToString(song.Key); 
            lb.CommandName = Convert.ToString(song.Key); 
            lb.Click += new EventHandler(test_Click);                      
            this.form1.Controls.Add(lb);
            PlaceHolder1.Controls.Add(lb);

And this is the "test_Click" function

    protected void test_Click(object sender, EventArgs e)
    {
        showAllSong("let it be");
    }

When i run the code it's show me the linkButton list but when i click on it nothing happens.

Krishna_K_Batham · Accepted Answer · 2016-10-22 10:07:35Z

2

Try this code ..

    static bool enable = false;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DynamicButton();
        }
        else if (enable)
        {
            DynamicButton();
        }
    }
    protected void btnBindMapping_Click(object sender, EventArgs e)
    {
        enable = true;
        DynamicButton();
    }
    protected void DynamicButton()
    {
        LinkButton lb = new LinkButton();
        lb = new LinkButton();
        lb.Text = songName + "</br>"; //LinkButton Text
        lb.ID = song.Key.ToString(); // LinkButton ID’s
        lb.CommandArgument = Convert.ToString(song.Key);
        lb.CommandName = Convert.ToString(song.Key);
        lb.Click += new EventHandler(test_Click);
        this.form1.Controls.Add(lb);
        PlaceHolder1.Controls.Add(lb);
    }
    protected void test_Click(object sender, EventArgs e)
    {
        Response.Write("<script>alert('done'); </script>");
    }

answered Oct 22, 2016 at 10:07

Krishna_K_Batham

3101 gold badge4 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

y.m Over a year ago

ok when call the DynamicButton function i send also a Dictionary when i put the Dictionary static it solve the problem

Syed Mhamudul Hasan · Accepted Answer · 2016-10-22 09:17:00Z

0

You code is fine ..it works as expected ..But change this line

this.form1.Controls.Add(lb);

to

this.Controls.Add(lb);

Note:It postback to your server not a client sided event

answered Oct 22, 2016 at 9:17

Syed Mhamudul Hasan

1,3392 gold badges17 silver badges46 bronze badges

Comments

VDWWD · Accepted Answer · 2016-10-22 09:25:28Z

0

Since you use CommandName and CommandArgument in the LinkButton, you have to delegate a Command not a Click.

lb.Command += new CommandEventHandler(test_Click);

protected void test_Click(object sender, CommandEventArgs e)
{
    Response.Write(e.CommandArgument + "<br>" + e.CommandName);
}

And remove the line this.form1.Controls.Add(lb);

And this is not clear from your question, but you have to create that button every time the page is loaded, and that includes a PostBack.

edited Oct 22, 2016 at 9:25

answered Oct 22, 2016 at 9:20

VDWWD

35.7k23 gold badges67 silver badges87 bronze badges

Comments

Krishna_K_Batham · Accepted Answer · 2016-10-22 09:43:16Z

0

In give detail you have not mention. when this dynamic button is created.

Because that may create a issue.

If you call your c# code in page load event then it works.

        LinkButton lb = new LinkButton();
        lb = new LinkButton();
        lb.Text = songName + "</br>"; //LinkButton Text
        lb.ID = song.Key.ToString(); // LinkButton ID’s
        lb.CommandArgument = Convert.ToString(song.Key); 
        lb.CommandName = Convert.ToString(song.Key); 
        lb.Click += new EventHandler(test_Click);                      
        this.form1.Controls.Add(lb);
        PlaceHolder1.Controls.Add(lb);

if that button create dynamically on oninit or onload event then it works.

answered Oct 22, 2016 at 9:43

Krishna_K_Batham

3101 gold badge4 silver badges10 bronze badges

2 Comments

y.m Over a year ago

i'm actually create this linkButton on a OnClick event

Krishna_K_Batham Over a year ago

You are creating linkbutton dynamically and it is adding when you click on any button, but when you click on you dyanmically create button . It fire a postback event and after postback it deleteing the control from the page. So, you must add the control in "page_load" again

Collectives™ on Stack Overflow

asp.net add link button dynamically click function

4 Answers 4

1 Comment

Comments

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related