i have a simple only contains a button witch have a behind code redirect to another page
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default1.aspx.cs" Inherits="Default1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
</html>
and the behind code is
using System;
using System.Web;
using System.Linq;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Generic;
public partial class Default1 : Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("~/Default2.aspx");
}
}
but when i open page and wait about 15 minuets and click on the button the event is not called only it seem like refresh the page
Your session is timing out.
The default session timeout value in ASP.NET is 20 Minutes.
The session timeout value can be increased in any one of the following ways:
IIS 7:
Select the website from the list of sites
Click on Session state on the right
Enter the session timeout under the cookie settings
Add the below line to the Web.config file, under the system.web section (You can change 20 to whatever value you want):
<sessionState timeout = "20" mode = "InProc" />
Add the below line to the Global.asax file, under the Session_Start method (You can change 20 to whatever value you want.:
Session.Timeout = "20";
Related
I have a web site in windows host = https://blobloblo/WebForm5.aspx
When run that link on FireFox developer & take a look at Console logs,
I will see this error :
Error: ASP.NET Ajax client-side framework failed to
Because of this error many parts of this web site do n't work correctly.
Yesterdays every thing was ok.
But today they closed the host for some hours & did some updates such as plesk's update.
After running the host again this error appeared.
What should i tell them to fix this problem?
WebForm5 ASPX :
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm5.aspx.cs" Inherits="Virtual_Visa_Cards.WebForm5" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" Text="Button" Height="26px" OnClick="Button1_Click" /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
WebForm5 C# :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Virtual_Visa_Cards
{
public partial class WebForm5 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "This is Ajax Call = CallBack";
}
}
}
Related Topic :
ASP.NET Ajax client-side framework failed to load. when put the ScriptManager on a blank page
I test all answers in the topic upper WITH NO RESULT.
In plesk i went to Web Application Firewall & put Web application firewall mode to off.
I worked one day to solve this issue.
first let me say that even though I am 60 years of age I am relatively new to c# and definitely new to asp.net.
I was doing a simple demo that I copied from the web, where I have a very minimal web form that only has a text box and a button. The code compiles and when run the web form it comes up and shows the proper button and text box. However, when I click the button, I should get an event to happen which does not happen. In fact, when I am debugging, I see that the program never executes to the event that increments the button click count. Of course, I am clicking the button during debug mode and I never see the click increment function executed.
Evidently the event of the button click is not being executed.
I have included a picture of the simple web form (hopefully, it will come through)
Thank You
Tom
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace ViewStateDemo
{
public partial class WebForm1 : System.Web.UI.Page
{
int ClicksCount = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
TextBox1.Text = "0";
}
}
protected void Button1_Click(object sender, EventArgs e)
{
ClicksCount = ClicksCount + 1;
TextBox1.Text = ClicksCount.ToString();
}
}
}
Simple Web Form
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="ViewStateDemo.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</form>
</body>
</html>
You didn't wire up your event. You have to tell the button what method to call when it's clicked.
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
By the way, you're learning ASP.NET Web Forms. Web Forms future is unclear, and bleak, and it's considered by many professionals to not be that great. If you're just starting out, you should learn ASP.NET MVC.
I've been doing some really clever stuff (I think) in ASP.Net c#, so much so that the simple stuff is more difficult (if that makes sense)
I have this snippet of code in my page
<form id="form1" runat="server">
<asp:HiddenField runat="server" ID="hdnConfirm" value="Hello World" />
<asp:LinkButton runat="server" PostBackUrl="/confirm.aspx" Text="Confirm">
</asp:LinkButton>
</form>
I have this snippet of code in confirm.aspx.
if !(IsPostback)
{
lblConfirm.Text = Request.Form["hdnConfirm"]
}
I was expecting this to be nice and simple but when i click the button and go to page "confirm.aspx" the Request.Form has no values. What have I missed ?
[TESTING]
I ran a test on a brand new web forms project in VS2013. Dot.Net 4.5.1 This does not work. PreviouPage is always null. Whether surrounded by (!IsPostBack) or not. Doesn't matter if the submitting control is a Button, LinkButton or Hyperlink. Request.Form["hdn"] is also null. I have restarted my computer just in case and still no joy. I am missing something really simple I am sure of it but I can't see what
This is the first page nothing in the code behind
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication2.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:LinkButton runat="server" PostBackUrl="~/WebForm2.aspx">click</asp:LinkButton>
<asp:HiddenField runat="server" ID="hdn" Value="3" />
</div>
</form>
</body>
</html>
This is the second page
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="WebApplication2.WebForm2" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
Code behind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication2
{
public partial class WebForm2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string s = ((HiddenField)this.PreviousPage.FindControl("hdn")).Value;
}
}
}
On confirm.aspx use PreviousPage.FindControl instead :
HiddenField hdnFieldName = this.PreviousPage.FindControl("hdnConfirm") as HiddenField;
string hiddenValue = string.Empty;
if (hdnFieldName != null)
{
hiddenValue = hdnFieldName.Value;
}
Here is good example to get you started.
What's going on Here:
By default with VS 2013 and Asp.Net v4.5.1 , there is a feature FriendlyUrls which is enabled.
The FriendlyUrls feature does kind of Asp.Net routing , thus changing URLs from localhost/webform1.aspx to localhost/webfrom1
PostbackUrl property will not work in combination with Asp.Net Routing. When ASP.NET routing is in use the PreviousPage URL is the final routed URL. The runtime will check for a file represented by the Routed URL now, which will be webform1 and NOT webfrom1.aspx. Since there is NO such file as webform1, so it will always set the PreviousPage to null.
Possible Solutions:
So, now you know the issue at hand.
1.) Either don't use the Routing system of Asp.Net Friendly Urls , in this case, therefore try adding the <%# PreviousPageType VirtualPath="~/WebForm1.aspx"%> to webform2.aspx page and check.
2.) OR if you keep the FriendlyURLs and hence the Routing system, make changes in your code to read the Form values using some other alternatives.
My page contains a user control and inherits a master page. Both have a button. I have put it in a form tag. I am just trying to do an event bubbling from master page as well as user control. Now it doesn't load because of multiple form tags error. How to do it?
Masterpage :
<%# Master Language="C#" AutoEventWireup="True" CodeBehind="SampleSite.master.cs" Inherits="EventBubbling.SampleSite" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title></title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
<asp:Button ID="Button1" runat="server" Text="MasterPageButton" />
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
User control :
<%# Control Language="C#" AutoEventWireup="True" CodeBehind="SampleUserControl.ascx.cs"
Inherits="EventBubbling.Controls.SampleUserControl" EnableViewState="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="btnUC" runat="server" OnClick="btnUC_Click" Text="UserControlButton" />
</div>
</form>
</body>
</html>
User control.cs page :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace EventBubbling.Controls
{
public partial class SampleUserControl : System.Web.UI.UserControl
{
public event EventHandler buttonClick;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnUC_Click(object sender, EventArgs e)
{
buttonClick(sender, e);
}
}
}
Main Page :
<%# Page Language="C#" AutoEventWireup="True" MasterPageFile="~/SampleSite.Master"
CodeBehind="Default.aspx.cs" Inherits="EventBubbling._Default" %>
<%# Register Src="~/Controls/SampleUserControl.ascx" TagPrefix="uc" TagName="SampleUserControl" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<div>
<uc:SampleUserControl ID="UC1" runat="server" />
</div>
</asp:Content>
.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace EventBubbling
{
public partial class _Default : System.Web.UI.Page
{
Button btn = new Button();
protected void Page_Load(object sender, EventArgs e)
{
UC1.buttonClick += new EventHandler(UC1_buttonClick);
btn = this.Master.FindControl("Button1") as Button;
btn.Click += new EventHandler(btn_Click);
}
void btn_Click(object sender, EventArgs e)
{
Response.Write("EventBubbling from MasterPage");
}
void UC1_buttonClick(object sender, EventArgs e)
{
Response.Write("EventBubbling from User control");
}
}
}
My goal is to learn event bubbling but I get some basic error with this code I posted.
your user control should not have a < form> tag, this is taken care of by the MasterPage all pages / controls are then rendered inside this master control < form> tag.
If you want to have your user control with its own form you will have to change to a different MasterPage and to be honest I am not sure how that would even work.
Keep Id of form different every where you are using form tag.
every where its <form id="form1" runat="server">.
Make it as Id=1 , Id=2 ,etc.
In master page keep form Id=1 , in user control page make it as 2 and in main aspx make it as 3.
Or Remove form tag from usercontrol page.
Since you have placed controls in master page, you need to keep the <form> tag thereon.
The error message: A page can have only one server-side Form tag. should actually be taken as: A page can have only one visible server-side Form tag.
if you want you can have more than one form tags.
Read here one Great tricks of Asp.net: http://blogs.msdn.com/b/kaevans/archive/2005/10/19/482778.aspx . Definitely not of much practical use.
Else, You need to correct the Markup of your userControl. Remove tags like: head, html, form.
Your final markup of UserControl will be:
<%# Control Language="C#" AutoEventWireup="True" CodeBehind="SampleUserControl.ascx.cs"
Inherits="EventBubbling.Controls.SampleUserControl" EnableViewState="false" %>
<div>
<asp:Button ID="btnUC" runat="server" OnClick="btnUC_Click" Text="UserControlButton" />
</div>
I hope you get the idea what all needs to be removed.
All such pages or usercontrols that are going to be a part of this master page must not contain any <form> tag.
I am trying to pass a value from a JScript function to an ASP.NET Control but I am not able to make it work. What am I doing wrong here:
aspx.cs
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication5._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function saveMyData() {
var myData = "TestData";
var hiddenInput = document.getElementById('<%=HiddenField1.ClientID %>');
hiddenInput.Value = myData;
}
</script>
</head>
<body onload="javascript:saveMyData();">
<form id="form1" runat="server">
<div>
<asp:HiddenField ID="HiddenField1" runat="server" />
<br><input type="submit" value="Press Me!"><br> <--New Code
</div>
</form>
</body>
</html>
Code Behind:
using System;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
namespace WebApplication5
{
public partial class _Default : Page
{
protected HtmlInputHidden HiddenField;
protected void Page_Load(object sender, System.EventArgs e)
{
string value = HiddenField1.Value;
}
}
}
**UPDATE**
I added in a Submit button but I am still not able to assign the myData Value to the Hidden Control, any thoughts?
All you're missing is a postback. You will need the page to post back before it is able to read the newly inserted value into HiddenField1. The javascript is adding the value to HiddenField1 after Page_Load.
What are you trying to do? From what it looks like, you try to read out the value you set via Javascript (on the client side), but you never actually returned the data to the server.
You wont be able to read it without a PostBack, because the javascript does not get executed on the server side.
Add a button, make a Postback and see if you can read out the data then.