ASP.NET

30-Jul-09 8:03

Hello I am trying to create linkbutton controls that are supposed to fire method. I add them to pageload however I am told that I should add them before it. I google the lifecycle and I found 2 events Init and PreLoad, I tried them and they are really fired before page_load however this time the controls even do not appear. here is the code:

protected void Page_Preload()
{
for (int i = 1; i <= 2; i++)
{
LinkButton bottomLink = new LinkButton();
LiteralControl bottomLiteral = new LiteralControl(" ");
bottomLink.Text = i.ToString();
pnlBottom.Controls.Add(bottomLink);
pnlBottom.Controls.Add(bottomLiteral);
bottomLink.OnClientClick += new EventHandler(this.changeLink);

}
}

it is drawing me crazy please help.

Abhijit Jana30-Jul-09 8:12

30-Jul-09 8:12

Ersan Ercek wrote:
protected void Page_Preload()

Where is parameter Object and EventArgs ?

Try this. Its work for me Big Grin | :-D

protected void Page_Preload(object sender, EventArgs e)
    {
        for (int i = 1; i <= 2; i++)
        {
            LinkButton bottomLink = new LinkButton();
            LiteralControl bottomLiteral = new LiteralControl(" ");
            bottomLink.Text = i.ToString();
            pnlBottom.Controls.Add(bottomLink);
            pnlBottom.Controls.Add(bottomLiteral);
            bottomLink.Click += new EventHandler(bottomLink_Click);
         }
    }

I will suggest you to create all the control on Pre_Init()

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
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Ersan Ercek30-Jul-09 8:20

30-Jul-09 8:20

Thanks for the reply but it is not working. Smile | :)

. That why I am getting crazy. Smile | :)

Do you think pnlBottom (panel) would be created before_preinit, since I added it on HTML page...

Thanks again.

Abhijit Jana30-Jul-09 8:26

30-Jul-09 8:26

Ersan Ercek wrote:
Do you think pnlBottom (panel) would be created before_preinit, since I added it on HTML page

you means, like this way ?

<asp:Panel ID="pnlBottom" runat="server">
 </asp:Panel>

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
View My Latest Article

Ersan Ercek30-Jul-09 8:27

30-Jul-09 8:27

Excatly... do you think this is the problem?

Abhijit Jana30-Jul-09 9:01

30-Jul-09 9:01

I did the same and I got two link in my page "1" and "2" .

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
View My Latest Article

Ersan Ercek30-Jul-09 9:17

30-Jul-09 9:17

does the link or the code you attached work?

Ersan Ercek30-Jul-09 9:28

30-Jul-09 9:28

okay I solve the problem for now Smile | :)

onclientclik ? what was that? Smile | :)

I changed it with click Smile | :)

Abhijit Jana30-Jul-09 9:31

30-Jul-09 9:31

Ersan Ercek wrote:
onclientclik ? what was that? Smile I changed it with click Smile

So, You didn't checked my code that I have replied on First time. D'Oh! | :doh:

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
View My Latest Article

Ersan Ercek30-Jul-09 9:32

SelectedIndexChanged Event for Dropdownlist AJAX

30-Jul-09 9:32

no i did not...

Ridge Howison30-Jul-09 7:06

Ridge Howison

30-Jul-09 7:06

Hello,

Thank you for reading. Here is my situation. I have an UpdatePanel and within in I have 2 dropdownlists.   I want to show the second ddlist only when a specific value is chosen in dropdownlist1. I used Javascript/label etc on the selectedIndexChanged event but still does not work. The event gets fired and I stepped thru the code with no problems but it does not render on screen. Code snippet below. All help is wonderfully,gratefully and thankfully appreciated.

Front End

<asp:UpdatePanel ID="updPanel1" runat="server">
            <ContentTemplate>
         <asp:DropDownList ID="ddlTest1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlTest1_IndexChanged">
            <asp:ListItem Value="" Text="Select one"></asp:ListItem>
            <asp:ListItem Value="Matt" Text="Matt"></asp:ListItem>
            <asp:ListItem Value="Robin" Text="Robin"></asp:ListItem>
            </asp:DropDownList>
            <asp:DropDownList ID="ddlTest2" runat="server" style="visibility:hidden;display:none;">
            <asp:ListItem Text="Select One" Value=""></asp:ListItem>
            <asp:ListItem Text="Tom" Value="Tom"></asp:ListItem>
            <asp:ListItem Text="John" Value="John"></asp:ListItem>

      </asp:DropDownList>
</ContentTemplate>
            </asp:UpdatePanel>

And the Codebehind is as follows:

Protected Sub ddlTest1_IndexChanged(ByVal sender As Object, ByVal e As EventArgs)
            If ddlTest1.SelectedValue = "Robin" Then

                  Dim script As String = "<script type='text/javascript'>var elem=document.getElementById('" & Me.ddlTest2.ClientID & "');elem.style.visibility='visible';elem.style.display='block';</script>

Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), "newKeyVal", script, True)

            Else
                  Dim script As String = "<script type='text/javascript'>var elem=document.getElementById('" & Me.ddlTest2.ClientID & "');elem.style.visibility='hidden';elem.style.display='block';</script>"
                  Page.ClientScript.RegisterClientScriptBlock(Me.GetType (), "newKeyVal", script, True)

            End If

      End Sub

Re: SelectedIndexChanged Event for Dropdownlist AJAX

Abhijit Jana30-Jul-09 8:14