C# - Respond To Button Events In DataList?
Aug 10, 2010
However when I push the button nothing happens, the text-box ain't updated.
I also wounder how i can access the data inside the DataList so that I can manipulate it inside the "DataList1_ItemCommand" function.
<p>
<asp:TextBox ID="NameTextBox" runat="server" CssClass="textEntry"
TextMode="SingleLine" Rows="0" Height="20px" Width="250px" Enabled="False"></asp:TextBox>
<asp:DataList
ID="DataList1"
runat="server"
[Code]....
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code:
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protected override void OnInit(EventArgs e)
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public int anz;
protected override void OnInit(EventArgs e)
{
for (int i = 0; i < anz; i++)
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tcButton=new TableCell();
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trPruefstation.Cells.Add(tcLabel);
trPruefstation.Cells.Add(tcTextbox);
trPruefstation.Cells.Add(tcButton);
tablePruefstation.Rows.Add(trPruefstation);
}
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}
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{
throw new NotImplementedException();
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The WebUserControl:
asp Code:
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="TestControl.ascx.vb" Inherits="CSLimitedEdition.Controls.TestControl" %><asp:Button runat="server" ID="btn" Text="Button" />
vb.net Code:
Namespace Controls Public Class TestControl Inherits System.Web.UI.UserControl Public Event ButtonClicked As EventHandler ' Just some property to test with Public Property Number As Integer Protected Sub btn_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn.Click ' When the button is clicked, raise a ButtonClicked event to handle on the Page RaiseEvent ButtonClicked(Me, e) End Sub End ClassEnd Namespace
The Page to place a number of these controls on:
asp Code:
<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Site.Master" CodeBehind="TestPage.aspx.vb" Inherits="CSLimitedEdition.Pages.TestPage" %><asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"></asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <p> <asp:Label runat="server" ID="lbl" /> </p> <p> <asp:PlaceHolder runat="server" ID="placeHolder" /> </p> </asp:Content>
vb.net Code:
Imports CSLimitedEdition.Controls Namespace Pages Public Class TestPage Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Me.IsPostBack Then Me.AddControls() End If End Sub Private Sub AddControls() For i As Integer = 1 To 5 ' Create the control Dim c As TestControl = DirectCast(Me.LoadControl("~/Controls/TestControl.ascx"), TestControl) ' Set some property for testing and add event handler c.Number = i AddHandler c.ButtonClicked, AddressOf TestControl_ButtonClicked ' Add it to the place holder placeHolder.Controls.Add(c) Next End Sub Private Sub TestControl_ButtonClicked(ByVal sender As Object, ByVal e As EventArgs) ' When a button on a usercontrol is clicked, set the label text to the 'Number' property of that control Dim c As TestControl = DirectCast(sender, TestControl) lbl.Text = c.Number.ToString() End Sub End ClassEnd Namespace
The idea is this:Button is clicked on the TestControl: TestControl.ButtonClicked event is raised. On the TestPage, the bestControl_ButtonClicked method is called The Number property of the calling TestControl is assigned to a label so I can see it. However, it seems that the TestControl_ButtonClicked method is never called. Via debugging I can confirm that the Button Click event, on the TestControl usercontrol, is fired, so that the TestControl.btn_Click method is called. The TestControl.ButtonClicked event is raised.After creating a TestControl, the AddHandler statement is executed. After clicking a button on the page however, nothing happens. The page just posts back, all the buttons are gone (ok, I'm not loading them again in case of a postback), but the label does not get the text.In fact, the ButtonClick handler method (TestPage.TestControl_ButtonClicked) method is never called! What could be causing this? I am sure that I have been using this method a few weeks ago, in this very project, yet suddenly it has stopped working. I thought it might be a one-time thing but with these new TestControl and TestPage the same thing happens. The same thing happens also in a completely new and separate project. I don't get it, this WAS working?
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The if (!Page.IsPostBack) is always false went the page loads after i click a linkbutton and it never goes into the linkbutton event. Googled as much as I can. I am kinda new to asp
This is the code that i have in server:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SetDefaultView();
}
}
private void SetDefaultView()
{
MultiView1.ActiveViewIndex = 0;
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
MultiView1.ActiveViewIndex = 0;
}
protected void LinkButton2_Click(object sender, EventArgs e)
{
MultiView1.ActiveViewIndex = 1;
}
// and below..
<td>
<asp:LinkButton ID="LinkButton1" runat="server"
onclick="LinkButton1_Click">Tab1</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton2" runat="server" onclick="LinkButton2_Click">Tab2</asp:LinkButton>
</td>
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I have a ASPX Page that contains several user controls, which are loaded dynamically after user interaction.
On one of ascx I have a hidden button that is being clicked on some user actions (via button.click()), which works fine on 1st page load. But after the form is being submitted once, the other ascx is loaded. There if user clicks the back button and resubmits the 1st form (again via button.click()), button_clicked event on server does not fire again.
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I have a couple of buttons controls in my gridview pagetemplate. when i click in next page button it is calling wrong events calling my dropdownlist_selectedIndexChange event?
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Aug 4, 2010
I am trying to fire one event out of two avalible events based on a check box selectoin, I have already registered the two events in the page_load() and i check if the check box is checked (checkbox is located within a gridview) then i un-register one of the events and just keep one events registered as following(Only relative part is shown):
[Code]....
I am trying to fire one event only based on the checkbox selection. I tryed to debug and noticed that, in fact, both evetns always get fired starting first with Button_SessionStartOrEnd_StartSessino and then Button_SessionStartOrEnd_EndSessino. So how can i fire one event only? please note that my code to check if the ckeckbox is checked within the girdview works fine.
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Feb 1, 2010
For some reason I can't get the button event to fire...
This is my Accordion:
[Code]....
I dynamically add the panes and buttons...
[Code]....
These two should get fired - but they dont:
[Code]....
I read somewhere that I should add the button to the UpdatePanel
[Code]....
But when I do I get this error :
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
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Since i have 5 buttons that pretty much run the same code, except for the database updates, i found some examples of how to do this.. so i created 1 button event, and put my general calc code then some if statements to determine what button was clicked.. but doing this now i get a NullReferenceException
and here is the code its complaining about, why would this work within the other button events, but not this one? Ive compared and and all the buttons on the page are the same with the except of the database entries.
Button b = (Button)sender;
Label tfive = (Label)FormView1.FindControl("five");
Label ttwo = (Label)FormView1.FindControl("two");
[Code]....
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