I am trying to pass data from client to server using a hidden field. If I use a button, then OnClientClick sets the value, and OnClick does the postback and all is well.
However, I am responding to a Client event, and although this works I get no postback. How do I now force a postback from my client handler?
I have a custom user control which contains a asp hiddenfield object. The value of this hidden field is being set using javascript and I have verified that the value is being set properly. When a postback occurs the new value is not being saved and I cannot access it in my code.
I believe the problem is because the user control is not saved in viewstate and therefore the hidden field value is not saved accross postback. How can I make the hidden field save its value? I tried accessing it from the early page cycles and still no luck.
I have the following in my code (Login.aspx page)
Javascript:
<script
language="javascript"
type="text/javascript">
alert(username);
[Code]....
i am facing the following problem while saving the viewstate on the server side using the savepagestatetopersistencemedium, but this is not working for the pages which contains update panel.
View 2 RepliesAccording to MSDN and the MCTS self-paced training, asp.net can use Hidden fields for client-side state management. The book material goes on to say view-state is more secure than hidden fields because the data is encrypted. I must be missing something here. I setup a Label and made it hidden. I can store data in this hidden label and it won't even be sent to the client browser. This not only works like server side state (note the runat=server), but this seems more secure than view-state because there's no need for encryption as the client can't even see the field.
<asp:Label ID="Label1" Visible="false" runat="server">secret info</asp:Label>
<input id="Text2" type="text" style="visibility:hidden;" value="secret 99" />
when we go for client and server side state management in asp.net
View 2 RepliesIn ASP.NET WebForms I want to pass arbitrary data from server to client and back again. I am serializing to JSON and have been simply producing JavaScript that creates the object on the client. I have no problem sending data to the server with ajax, but there are situations where I also want to send a Javascript object data back to the server on postbacks. So I guess it needs to be in a hidden field.
1) What is the best way to do this in terms of minimizing complexity and optimizing space and efficiency? In researching this I discovered Protocol Buffers but there does not seem to be a good C# implementation. I did find one, but it was a couple years old and self-described as buggy so that scared me.
2) If I just pass a JSON string, how can I be sure it will be safe to include as the value for a hidden field? Is there any reason I might not want to do this? I could Base64 encode, but it seems like this adds a lot of overhead. What is considered the best or preferred method?
I want to redirect from one aspx page to another aspx page of different application.Both applications are hosted in different application servers. I want to pass a value from one application to another.I tried - 1. Response.redirect with Query string - But query string is not secure as it is visible to user in browser.2. Cookies - This is also not a secure way. Again if the cookies are disable in the browser it may not work.3. Server.transfer - In different web application we cant use server.transfer.Please provide any easy solution how to achieve this. I dont want to display the values to the user as it is confidential data.
View 13 RepliesI have deployed a Web application on IIS 6. I want to prevent my server from setting cookie on the client browser. I am using the following setting on the web.config file.
< sessionState
mode="InProc"
cookieless="false" [code]....
However, it looks like its creating a default cookie named ".ASPXAUTH" in the client machine. I dont want my application to create any sort of cookie.Is there anything specific I need to do in web.config?
I have to split a long form into two pages. In the first page, I have a button "Next Page" to second page and in second page, a button "Previous page" to go to first page. How do I keep the form data when click "next page" and "previous page"?
I am using session variables to pass the form data. I have the server control Enableviewstat as true, but it still doesn't work. What else should I do? My code as below:
[Code]....
cookies are generated from the client scripting.e.g. document.cookie = city=NYC;
I want to update this from GUI using
Response.cookies["city"] = LA;
I could not understand why this is not possible.( I read about Httponly and all that stuff but still not clear).If I use Javascript in code behind page then I am able to change the value.e.g.
Literal ltMsgUpdate = new Literal();
ltMsgUpdate.Text = "<script type='text/javascript'>document.cookie = 'city=LA';" + "</script>";
Page.Controls.Add(ltMsgUpdate);
But I could not use this type of code because there is response.redirect statement in the function where I am updating cookie using (response.cookie) and that's why the javascript code never runs.
Bottomline: I want to update cookies in code behind page which is generated in client scripting.
I have a small db table that has a data field that is used throught my web application. What is the best way to carry this value from page to page with out calling the table everytime the page if refreshed or a new page requests the value?
I am using VS2010 .net framwork 3.5 SQL Server 2008 and utilizing LINQ for my queries.
If I create a new project, start this project and look at the source code, I see that there are some additions to the original code. The first this, what is "ViewState" and what does the hash mean? Why is the input control hidden?Here an example:
[code]....
I have a parent control that has an instance of a HiddenField child control. I am using CreateChildControls() to add it. Everything works client side including the values being added to the field. However, on postback, the reference to the field is null
here is the code
[code]....
I have tried simply relying on the ViewState ... then also attempted using FindControl(). Neither works, it comes up as a null reference ... any input on what is going here?
I have a text box and a asp button in master page, i just want to use the value of the text box on the target page. i have set the post back url of the asp button.on the page load event of the target page i write the following code
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not isPostback Then
Try [code]...
this is not working. i could not get the value of txtSearch.
want to use the value of a variable on to the other page, what i am supposed to do for that.i am novice at asp.net
View 8 RepliesI have a number saved in session and am using it in a bunch of pages right now, and I was wondering if I could somehow access this session in my WebService.asmx file? It would be great since then that way I can fix my auto complete extender. I know I can use contextKey, but I am using that contextKey for something else. If session isn't possible in web service, then is it possible to use two contextkeys in auto complete extender, and how?
View 1 Repliestrying to pass a guid value to querystring - it should take the guid value from one page to another. i get an error: value cannot be null, parameter name: g. so my guid value is not being pass to my second page. below is code:
Page one:
static Guid g = Guid.Empty;
public static string userID = g.ToString();
string userName = string.Empty;
[code]...
how to pass the value from one page to another page in asp.net with out Using State Management Concepts?
Like 1. cookies 2.Sessiion 3. QueryStrings.With out using the above should pass the values..
I have a aspx page and there is a web user control that must load dynamically with the data related to the aspx page....
ok so I want to use a querystring and pass it to the web user control.....how do I do this?
then also how do I pass a querystring from a web user control back to a aspx page?
This is a question I always had...and therefore never actually started to use the web user control
I have searched and searched and unable to find an easy to understand answer with a sample of what I am after. Apologies I am new to ASP and programming VB.
View 5 RepliesI have a parameter screen which contains many pop up windows for the parameters .
I have a department hierarchy which consists of department , branch and section.
I have 3 pop up windows for each parameter.
When i select, a department, it filters the list of the branch and shows only its branch when i open the branch pop up window.
But the problem is, when i select multiple departments, the branch pop up window shows the below error. The page works if only a department is shown.
Conversion failed when converting the nvarchar value '3,4,5,6 to data type int. Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
My code for the branch page is :
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Branch.aspx.cs" Inherits="Modules_Reports_Branch" Title="Select Branch"%>
<!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">
[Code]....
I have two websites one in ASP.Net and other in PHP.I want that if a person logged in on one website then he gets a link for second website. When he/she click on that link his userID is passed to second site. If i am using query string then it is security lack. Can I use web Services for that. How I make web service secure. Is there are other way of doing this.
View 8 RepliesI am using a FormView and on insert I want it to be redirected to another page and take the ID of the FormView which I have just inserted so I can have page b load with the date from page a that I have just inserted
View 3 RepliesIn my web application, I set the mode of session state as State Server and point to another server. After run some days, I always meet following exception:
The state server has closed an expired TCP/IP connection. The IP address of the client is 192.168.80.157. The expired Read operation began at 08/25/2010 14:18:03.