I have a web site with some aspx pages. There are occasions when a button on a page is clicked and instead of executing the code written on button click, the page simply reloads and losses values that was entered in various controls on the page.
This does not happen everytime, but randomly. This erratic behaviour is not restricted to any one page , but happens throughout the site. What could be the reason ?
Consider this code:
Partial Public Class MyAspNETClass
Inherits System.Web.UI.Page
Protected Shared MyVariable As String
Is Myvariable a variable used local for each instance of the page ? Or that variable is "shared" for all users accessing my page? Is MyVariable saved in server memory, or is it saved on the viewstate of aspx page?
IDE: MS Visual Studio 2008 / SQL Server 2005 Express / SQL Server Management Studio Express 2005
Skills: Beginner
Well im trying to make a custom login page(im not using ASP.net Login Control), in Admin.aspx page
UserName and Pasword are entered in textboxes , then Code-Behind file checks the UserName and Pasword against DataBase(it stores the UserName and Pasword) if both are correct Session["IsAuthenticated"] = "true" and then user is redirected to AdminArea.aspx
AdminArea.aspx checks if ( Session["IsAuthenticated"].ToString() == "false" ) then redirect to Error page..
but i get NullReferenceException on AdminArea.aspx because Session["IsAuthenticated"] is null , i dont know why ?
I even tried PreviousPage.Session["IsAuthneticated"] but still got the same error..
I debugged,and found out Admin.aspx saves value in Session["IsAuthenticated"] succesfully but AdminArea.aspx looses the Session["IsAuthenticated"]..so it gets null
My Question is how to retain value in Session["IsAuthenticated"] when page is changed (I want to retrieve value in next page from Session)?
I have a aspx page with Charts and DataGrips and I want to print all my page in a pdf just like it look in my page.
View 9 RepliesI'm not conversant with JavaScript, however I need to refresh the page in few seconds so I want to use this code-
<script type="text/JavaScript">
<!--
function timedRefresh(timeoutPeriod) {
setTimeout("location.reload(true);", timeoutPeriod);
}
// -->
</script>
<body onload="JavaScript:timedRefresh(10000);">
<p>
This page will refresh every 10 seconds. This is because we're using the 'onload' event to call our function. We are passing in the value '5000', which equals 5 seconds.
</p>
</body>
Now my aspx page is using Content and referencing masterpage, Page Language="VB"
When I try to add this code to a new page it works fine and page refreshes as desired, but on existing page it gives error-ErrorValidation (XHTML 1.0 Transitional): Element 'body' cannot be nested within element 'td' ....
I want to make ASPX page with textboxes and dropdown to insert the data into the database and Gridview to display all the data. I wnat some good designs, how can I make the page more attractive with just textboxes,dropdown ,buttons and gridview.
Do somebody have good aspx page, paste just the design here.
A client of ours uses a home owners association website as a service. They can add pages to the site. We added a page and used an iframe in the html code to display another website which is needed. It works fine in all browsers except some copies of Internet Explorer. For example, it does not work at my home IE8 but may for others.
But here is where it gets wierd! When I try to view it in IE, it fails by just keep trying and eventually fails. Then if I past the URL it is trying in the browser by itself, it loads. Then I go back to the association website and try and it will work by loading the website in the iframe page. It does this only after I view the website url by itself in the browser.
code behind:
$("input:text.inputTypeDate").datepicker({
dateFormat: "dd/mm/yy",
changeMonth: true,
changeYear: true
});
});
ASP :
<asp:TextBox ID="txtDate" runat="server" Width="120px" class="inputTypeDate">
</asp:TextBox>
It works fine on page load, but when I click on clear button to empty textbox, it stops working.
I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..
1. I use masterpage on all the pages and I need viewstate for some of the pages but..
There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?
Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?
Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?
I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status.
Order.aspx always throws an invalid viewstate error, even though viewstate is disabled on the page.
What's happening is that Cart.aspx (which has viewstate enabled) posts to the payment gateway, and the gateway will post it back as part of the silent post. Even though Order.aspx has viewstate disabled and validation disabled, it still tries to validate the __viewstate field it's being given.
I know setting EnableViewState=false will disable the rendering of the __viewstate field, but if another page provides the field, shouldn't it still skip validation? I tried calling ViewState.Clear() on the Page_Init event of Order.aspx, but ViewState is apparently empty. how to get around this? I don't want to disable ViewState on Cart.aspx (in some cases it may be necessary), but I can't figure out how to clear it on Order.aspx.
I have a VS 2008 solution. I need to copy an existing .aspx page and re-name it to something else (need to make modifications to that newly copied page). But I keep getting compilation errors saying that duplicate text boxes exist. Can't I have control on different .aspx pages with the same name? How can I do this elegantly?
View 4 Repliesim developing an asp.net website application but suddenly all changes i make to the page in the visual studio designer are not being saved for some reason. Every thing i do in the code behind file is saved with out any problem, also if i edit the .aspx file but in sourceview, the changes are saved, but if i drag a control from the toolbox onto the page designer and set some properties and then save, nothing will have been saved when i close and re-open the page, all changes are lost.
View 1 Repliesim developing an asp.net website application but suddenly all changes i make to the page in the visual studio designer are not being saved for some reason. Every thing i do in the code behind file is saved with out any problem, also if i edit the .aspx file but in sourceview, the changes are saved, but if i drag a control from the toolbox onto the page designer and set some properties and then save, nothing will have been saved when i close and re-open the page, all changes are lost. Its confusing and i have no idea why.Edit: also this happens on only one aspx file. All the other files edits are saved.[URL]
View 2 RepliesIs it possible to call (Post to) a Method in a ASPX (Code behind) page via HTTP endpoint in Sql server 2008/2005.
View 1 RepliesI have read about the file upload control in asp.net and tried it and works great. But I want to know if I can use it for another purpose. I have a video capture control that can be used for webcam apps or anything else. It has a method called HTTPUpload where it will upload an image file to the server using the HTTP upload protocol. My question is can i use the .net FileUpload control for this? And if so, how can I pass the image file straight to the .aspx page without having to submit a button? Would the file be as a query string variable?
Arguments:
WebServer = web server address
WebPage = name of upload web page
Fields = list of 'fieldname' and 'fieldvalue' values delimited with '|'
Files = list of 'fieldname' and 'file path' values delimited with '|'
Returns TRUE if successful, or FALSE otherwise.
Example
vcx.HTTPUpload "[URL] , "upload.asp",
"field1|value1|field2|value2" ,
"file1|c:foldermypic.jpg|file2|c:foldermyvideo.avi"
I was trying to avoid ViewState in one of my forms, so I thought I could store the selected item as a session variable.
However, I realized that SelectedIndexChanged does not fire on a drop-down's autopostback unless I have ViewState enabled. Am I missing something here?
The entire message is Viewstate verification failed. Reason: Viewstate was invalid.
This is getting logged to the eventlog on our "dev" server. It suddenly started to happen. I have been programming locally and I am often (daily, hourly) moving new dll's and pages to the dev server so our BA can test. When my application gets an exception it puts up an error page and there's usually an event logged with "Error" severity - like if an index goes beyond array bounds, etc. The BA is getting the error page, but the message at the time is "Warning" severity and it's this viewstate thing. But the log is indicating it happened in my page. So I don't understand what I could've done to cause it.
I need to store viewstate in session to optimize my page performance on postback.
I am developing ASP.Net Website, using Visual Studio 2008.
I created a class named "BasePage" under "App_Code".
[Code]....
Now, I know if I inherit this class in all of my pages, that will work but I am looking to do this through Config file.
Is there any way that I can write something in Config file to use this class for all the pages?
so that if I want to remove, I can simply remove from config file and I do not need to compile my whole project again.
i want to write aspx page html from aspx.cs page on page load..
i hav already used div.innerHtml...
i want to write below code in aspx page from aspx.cs page
[code]....
I want to write own control which can contain other. And I want to define content of the control in the .aspx file where the control is defined. I have written such control. But now I have issue with ViewState of inner controls of my control. The following samle illustrates the issue: I defined two asp:DropDownList ID="ddl1" and ID="ddl2" One of them is inside of my control and other is outside. When posback is occurred asp:DropDownList ID="ddl1 loses state and becomes empty. How to say ASP.net to store state of inner controls defined by this way?
MyControl.ascx:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="DynamicControls.Controls.MyControl" %>
<div class="box"> [code]....
is it possible to place an aspx page inside the update panel of another aspx page? if possible let me know the way to do that.
View 1 RepliesHow can I call a public property declared on a ASPX page from a different ASPX Page? Is that possible? It is a website project. How can I get/call this property from a different aspx page? I have attempted this from the other page, but it is not recognizing the partial class: private Test_Default _test; It does not recognize the "Test_Default"
I.E.
[code]....
what i wanna do is:
there is an dropDownList in the master page with 4~5 items.
i've prepared 4~5 sub-page related to the above item. when the dropDownList.ItemChanged, the subpage content will show their own page.
use html iframe to include another aspx page.
in my cs code:
[Code]....
but when i change the item in the dropdownlist, the error pops up:
[URL]
I have 2 dropdownlist that fill with a datasource, the thing is that I have to iterate through this data to do other things in my page, but I don't want that data to be visible
If I set its visible property to false they stop working, my code that iterates through them does not work, what can I do?
I have a dropdown that is populated from the database on my page_load event, however, the drop down looses its content after a postback.
View 4 Replies