Develop Reference

ASP.Net WebForms not firing UI events from codebehind file

I have simple UI in aspx file, with aspx.cs codebehind. No matter what kind of control I use, events from this file wont fire - the only ones that are working are events like Init, PageLoad.
Events are created via designer.
What I tried:
Basic OnClick on markup page
OnClick in designer
Inline c# Code in markup page via javascript
PageMethods
Pure javascript click
Whole new page
When I add for example alert for click event in javascript, it works. But Im not able to run my c# code after user clicks on button.
I have also removed everything from file (validation, other controls...), but not even then my code works.
There are also no errors in console
Markup Page
<%# Page Language="C#" AutoEventWireup="true" MasterPageFile="~/Views/Shared/Site.Master" EnableEventValidation="false" CodeBehind="Report.aspx.cs" Async="true" Inherits="App.Web.Views.Besparingen.Report" %>
<%# Register Assembly="Microsoft.ReportViewer.WebForms" Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>
<asp:Content runat="server" ContentPlaceHolderID="Content" ID="Content1">
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<link href="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/css/bootstrap.min.css"
rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/js/bootstrap.min.js"></script>
<link href="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/css/bootstrap-multiselect.css" rel="stylesheet" type="text/css" />
<script src="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/js/bootstrap-multiselect.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$('[id*=selectYear]').multiselect({
includeSelectAllOption: true
});
});
</script>
<script type="text/javascript">
$(function () {
$('[id*=selectPortfolio]').multiselect({
includeSelectAllOption: true
});
});
</script>
<script type="text/javascript">
$(function () {
$('[id*=selectSector]').multiselect({
includeSelectAllOption: true
});
});
</script>
<form runat="server" id="form">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" ScriptMode="Release" ClientIDMode="Static" ViewStateMode="Enabled">
</asp:ScriptManager>
<div style="margin: 10px;">
<asp:Label Style="margin-right: 40px;" ID="YearLabel" Text="Year:" runat="server" AssociatedControlID="selectYear"></asp:Label>
<asp:ListBox ID="selectYear" runat="server" DataValueField="Value" DataTextField="Text" SelectionMode="Multiple" CausesValidation="false"></asp:ListBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ForeColor="Red"
ControlToValidate="selectYear"
ValidationGroup="yearGroup"
ErrorMessage="Select year."
runat="server">
</asp:RequiredFieldValidator>
</div>
<div style="margin: 10px;">
<asp:Label Style="margin-right: 12px;" ID="PortfolioLabel" Text="Portfolio:" runat="server" AssociatedControlID="selectPortfolio"></asp:Label>
<asp:ListBox ID="selectPortfolio" runat="server" DataValueField="Value" DataTextField="Text" CausesValidation="false"></asp:ListBox>
</div>
<div style="margin: 10px;">
<asp:Label Style="margin-right: 25px;" ID="SectorLabel" Text="Sector:" runat="server" AssociatedControlID="selectSector"></asp:Label>
<asp:ListBox ID="selectSector" runat="server" DataValueField="Value" DataTextField="Text" CausesValidation="false"></asp:ListBox>
</div>
<div>
<asp:Button ID="reportButton" runat="server" OnClick="reportButton_Click" ClientIDMode="Static" Text="Create report" CausesValidation="true" ValidationGroup="yearGroup" />
</div>
<div style="margin-top: 40px;">
<rsweb:ReportViewer runat="server" ID="reporter" Width="100%" ClientIDMode="AutoID" ProcessingMode="Local" BackColor="White" BorderStyle="None" ToolBarItemBorderStyle="None" InternalBorderStyle="None" BorderColor="White" InternalBorderColor="White" ToolBarItemBorderColor="White" AsyncRendering="false"></rsweb:ReportViewer>
</div>
</form>
<script type="text/javascript">
$(document).ready(function () {
//$("#reportButton").click(function () {
// event.preventDefault();
// alert("Handler for .click() called.");
//});
});
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="Head" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="Title" runat="server">
Besparingen
</asp:Content>
<asp:Content ID="Content4" ContentPlaceHolderID="ValidationSummary" runat="server">
</asp:Content>
Code Behind file
public partial class Report : System.Web.Mvc.ViewPage<model>
{
List<string> years = new List<string>();
string sector;
string portfolio;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
selectPortfolio.DataSource = Model.List[0].Portfolios;
selectPortfolio.DataBind();
selectYear.DataSource = Model.List[0].Years;
selectYear.DataBind();
selectSector.DataSource = Model.List[0].Sectors;
selectSector.DataBind();
}
}
protected void reportButton_Click(object sender, EventArgs e)
{
foreach (ListItem item in selectYear.Items)
{
if (item.Selected)
{
years.Add(item.Text);
}
}
sector = selectSector.SelectedItem?.Text ?? string.Empty;
portfolio = selectPortfolio.SelectedItem?.Text ?? string.Empty;
if (years.Count > 0)
{
BesparingenDS.DataTable1DataTable table = new BesparingenDS.DataTable1DataTable();
DataTable1TableAdapter adapter = new DataTable1TableAdapter();
adapter.Fill(table, sector, portfolio, string.Join(",", years));
ReportDataSource datasource = new ReportDataSource("DataSource", (DataTable)table);
System.Security.PermissionSet sec = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.Unrestricted);
reporter.LocalReport.SetBasePermissionsForSandboxAppDomain(sec);
reporter.LocalReport.ReportPath = "Views\\Besparingen\\BesparingenReport.rdlc";
reporter.LocalReport.DataSources.Clear();
reporter.LocalReport.DataSources.Add(datasource);
reporter.LocalReport.Refresh();
reporter.DataBind();
}
}
}
Thank you for help and sorry for my bad english

Data set from javascript getting cleared after postback

The values set from javascript is getting cleared after postback, I'm setting value to gridview process column from setdata button client click but when the button in start column is clicke the value set previously is cleared. Please see the code below and suggest a solution.
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function SetData(name, name2) {
document.getElementById(name).innerHTML = 'data.d.Name';
document.getElementById(name2).innerHTML = 'data.d.Name2';
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div>
<asp:GridView ID="gvMonitoring" runat="server" Width="100%" AllowPaging="false" PageSize="10"
AutoGenerateColumns="false" DataKeyNames="Id"
EnableViewState="true" OnRowDataBound="gvMonitoring_OnRowDataBound">
<Columns>
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name 2">
<ItemTemplate>
<asp:Label ID="lblName2" runat="server" EnableViewState="True" ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Set Data">
<ItemTemplate>
<asp:Button ID="btnSetData" runat="server" Text="Set Data" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Start">
<ItemTemplate>
<asp:Button ID="btnStartTime" runat="server" Text="Postback" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Web.UI.WebControls;
public partial class ProcessDetail
{
public long Id { get; set; }
public string Name { get; set; }
}
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
var details = new List<ProcessDetail>();
for (var i = 1; i <= 5; i++)
{
details.Add(new ProcessDetail() { Name = "Process " + i});
}
gvMonitoring.DataSource = details;
gvMonitoring.DataBind();
}
}
protected void gvMonitoring_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var lblName = ((Label)e.Row.FindControl("lblName"));
var lblName2 = ((Label)e.Row.FindControl("lblName2"));
((Button)e.Row.FindControl("btnSetData")).Attributes.Add("onclick", string.Format("SetData('{0}','{1}');return false;", lblName.ClientID, lblName2.ClientID));
}
}
}

To clarify #Imad, a postback is a complete page reload. Thus if you have any javascript it will also be reloaded. Which will clear out any values you stored. If you have to mix javascript with web forms there are two ways that I would recommend.
1) Your javascript will need to use ajax calls and update controls. Only using postback on a complete save. Meaning if you have a form and it takes Someones name/address. I would validate the data through ajax. And then, when it is all correct I would trigger a postback for save.
2) Create some Hidden Fields, that would hold the important var's that you need to save, and access those through server tags <%= =>. This way is pretty terrible but it can be done.

Trigger postback on value change in GridView

I'm using dyndatetime as in this link DyntimeSample
This is used in a gridview, Whenever the user selects a new date or time I want to trigger a postback using update panel.I have tried tracking the value assigned textbox change event but it was not working.Please suggest a solution.
In the below code I want to trigger textbox on change event.
EDIT: Added code
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-1.10.2.min.js" type="text/javascript"></script>
<script src="Scripts/jquery.dynDateTime.min.js" type="text/javascript"> </script>
<script src="Scripts/calendar-en.min.js" type="text/javascript"></script>
<script type = "text/javascript">
$(document).ready(function () {
$(".Calender").dynDateTime({
showsTime: true,
ifFormat: "%Y/%m/%d %H:%M",
daFormat: "%l;%M %p, %e %m, %Y",
align: "BR",
electric: false,
singleClick: false,
displayArea: ".siblings('.dtcDisplayArea')",
button: ".next()"
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Person" />
<asp:TemplateField HeaderText="Date Of Birth">
<ItemTemplate>
<asp:TextBox ID="txtDOB" style="border: 0px solid #505050;" AutoPostBack="True" OnTextChanged="txtDOB_OnTextChanged" runat="server" ReadOnly="true" class = "Calender" />
<img src="calender.png" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="btnSave" runat="server" Text="Save" onclick="btnSave_Click" />
</div>
</form>
</body>
Code behind
using System;
using System.Web.UI.WebControls;
using System.Data;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.BindGridWithDummyData();
}
}
private void BindGridWithDummyData()
{
DataTable dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("DateOfBirth");
dt.Rows.Add();
dt.Rows[0]["Name"] = "John";
dt.Rows.Add();
dt.Rows[1]["Name"] = "Sam";
dt.Rows.Add();
dt.Rows[2]["Name"] = "Tommy";
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void btnSave_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
DateTime dob = DateTime.Parse(Request.Form[row.FindControl("txtDOB").UniqueID]);
//Save the date to Database here
}
}
protected void txtDOB_OnTextChanged(object sender, EventArgs e)
{
}
}

Note: If you set updateMode to conditional in the update panel, in that case you need to add Triggers. In the code behind file under TextBox1_TextChanged event, you can get the latest value using sender.text property.
Try using the following:
<asp:ScriptManager ID="scrManager" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="updPnl" runat="server" UpdateMode="Always">
<ContentTemplate>
<asp:GridView ID="grdNumber" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="txtNumber" runat="server" OnTextChanged="TextBox1_TextChanged" AutoPostBack="true"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:DropDownList ID="ddlNumber" runat="server" OnSelectedIndexChanged="ddlNumber_SelectedIndexChanged"
AutoPostBack="true">
<asp:ListItem>One</asp:ListItem>
<asp:ListItem>Two</asp:ListItem>
<asp:ListItem>Three</asp:ListItem>
<asp:ListItem>For</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
In the code-behind:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataTable dt = new DataTable();
dt.Rows.Add();
dt.Rows.Add();
dt.Rows.Add();
dt.Rows.Add();
grdNumber.DataSource = dt;
grdNumber.DataBind();
}
}
protected void ddlNumber_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
var value = (sender as TextBox).Text;
}
For more, check this link: http://www.aspsnippets.com/Articles/Assign-PostBack-Trigger-Full-PostBack-for-LinkButton-inside-GridView-within-AJAX-UpdatePanel-in-ASPNet.aspx

updatepanel postback in content placeholder

i have the following code:
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<script type="text/javascript">
document.body.onload = function RefreshPanelEveryMinuteLoop() {
if (document.getElementById('<%=drptime.ClientID %>').value > 0) {
__doPostBack('UpdatePanel1', '');
//var SelectedValue = ddlRefreshGrid.options[ddlRefreshGrid.selectedIndex()].value;
setTimeout(RefreshPanelEveryMinuteLoop, document.getElementById('<%=drptime.ClientID %>').value);
}
}
</script>
<div class="dropbox">
<asp:DropDownList ID="drptime" runat="server">
<asp:ListItem Value="60000" Text="1 Minute" Selected="True"></asp:ListItem>
<asp:ListItem Value="180000" Text="3 Minute"></asp:ListItem>
<asp:ListItem Value="0" Text="Don't Refresh"></asp:ListItem>
</asp:DropDownList>
</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" OnLoad="UpdatePanel1_Load">
<ContentTemplate>
<asp:Repeater ID="gvd" runat="server" OnItemCommand="gvd_ItemCommand" OnItemDataBound="gvd_ItemDataBound">
<HeaderTemplate>
</headertemplate>
<ItemTemplate>
....
....//lines of code
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
now when i call that JavaScript function on windows load then it will continue refresh the page
in that javascript i have give the settimeout method but it is not working...
it is continuously do _dopostback but i want to do _dopostback after some minute which i have defined in
so how can i perform this ?

AJAX UpdatePanel.Visible Property not working with Javascript

I have code below. I want to hide the update panel by using Javascript (without going to server) when the user clicks Hide button. Although javascript funciton seems to be working fine in debugging, it does not hide!
<script type="text/javascript" language="javascript">
function Show() {
document.getElementById("UpdatePanel1").Visible = true;
}
function Hide() {
document.getElementById("UpdatePanel1").Visible = false;
}
</script>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Button ID="btnShow" runat="server" Text="Show" OnClientClick="Show(); return false;" />
<asp:Button ID="BtnHide" runat="server" Text="Hide" OnClientClick="Hide(); return false;" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<br />
<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox>
<br />
<asp:Button ID="btnSubmit" runat="server" Text="Gönder"
onclick="btnSubmit_Click" />
<br />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>

you need to use the UpdatePanel1's client id so
document.getElementById('<%=UpdatePanel1.ClientID%>');