MVC :: Web Page Developed Using MVC Framework Don't Do Postbacks?

Aug 22, 2010

I read web page developed using MVC framework don't do postbacks. I created a controller, one model class and view. View page contains textboxes and button. When I cliked on button, page is still causing the postback. What is the reason behind this postback?

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AJAX :: - Upgraded To Framework 3.5 Full Postbacks Occuring?

Jan 7, 2010

We have recently upgraded to Framework 3.5 from 2.0. Since then, areas of the site now do full postbacks where they did partial postbacks in 2.0. There are numerous cases and they seem to differ. In one case there is a image button within a repeater that
is in an update panel. The update panel is also within a user control. In 2.0 the click of the image button would cause a partial postback. Now in 3.5, it results in a full postback. If the repeaters' ItemCommand event is set up in the update panels' asyncpostback
triggers, it will work again. Shouldn't the controls be picked up by the updatepanel by default? Other areas of the site that use similar controls and methods seem to work fine.

Having to some kind of code fix is really not an option. We would require a full scale manual retest of the whole site to find all the partial postbacks that no longer work and try and fix. We do not have the time or resources to handle that. I am hoping there is a setting or property in the web.config that I am overlooking that could be set that would return everything to working as it did in 2.0.

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Add Already Developed Aspx Page In Sharepoint Site?

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Also have another page in same scenario after login this second page will appear. ok ?

I want to embed/ add this already developed aspx page to above team site.

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How To Raise Load Event On Previous Page With Cross Page Postbacks

Feb 21, 2010

I'm working on a wizard-like set of page, and I'm relying on cross page postbacks to navigate between them.

I need to be able to trigger the Load event on the previous page in order to save the form data for the page.

I've been told that for situations of this sort all I had to do is access the PreviousPage property in the destination page and this would trigger the load event of the previous page but for some reason this doesn't seem to be working.

Is there anything else I can do to explicitly trigger the load event on the previouspage if the PreviousPage property is not null?

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Cross-page Postbacks And Back Again Retaining Data From Source Page?

Sep 17, 2010

Is it possible to use cross-page postbacks (or a similar method, perhaps Server.Transfer) to post form data (say, Data-set A) to a page, which then allows the user to add some additional information (say, Data-set B) and then postback to the original page the complete set of data (A+B) which then flows through the normal event execution process, similar to as if all data A+B was submitted on the original page to itself in a normal postback?

I don't want the second page to have any type knowledge of the original page, it just needs to supply two additional feeds and send the data on. This way different pages and controls could use this method for gaining additional data.

For example:

Page 1 could have a form with various text inputs, and two hidden fields Hidden1 + Hidden2 which are empty.

When the form on page 1 is submitted the user is presented with page 2, they complete that page and then all the form data from page 1 is posted back to page 1 but with the hidden fields 1 + 2 complete. Page 1 then has all the information it needs to complete.

I'm thinking that perhaps page 2 just needs to use PreviousPage and take its post data, add to it and then post it back to page 1, but as if it came from Page 1 and not Page 2. But I'm not sure if this is possible and ASP.NET might read this as tampered data?

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Using Update Panel In Page For Partial Page Postbacks?

Dec 30, 2010

I am using update panel in my ASP.net page for partial page postbacks. I have gridview and a button "Export" which on click will call the Export method from the below class. If I remove the update Panel everything will work as expected. But if there is a update panel it will not work and throws this error.

Below is the code for the

using System;
using System.Data;
using System.Configuration;
using System.IO;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

[Code]....

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Page Postbacks And Event Handling?

Mar 8, 2010

how ASP.NET handles page postback and events?

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Multiple Postbacks Of ASPX Page?

Nov 19, 2010

I have an aspx page with a simple form to send emails to pre-defined lists of users. On the longer lists the page usually times out before the emails finish sending but this has never been an issue. Today something weird happened and each user got four emails. In the log I could see three new threads crank up one at a time and start over sending from the beginning of the list.Any ideas? I absolutely know I didn't intentionally refresh the Web page myself, and certainly not three times. But could the browser (IE8) have done it? Would it post again trying to re-establish a connection when it timed out? Or when I switched back to the browser window from another app? I have never seen behavior like this before.

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Web Forms :: How To Retrieve Variable Value Across Page Postbacks

Jan 23, 2010

I have a value variable as: Dim Tax As Decimal = total * 0.075

i would like this value be available to sub procedures on the page even after a postback?

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AJAX :: Page State Lost During Postbacks With Updatepanel

Jan 14, 2010

1. I have couple of checkboxes and some text fields outside the updatepanel.

2. Based on the checkbox selection, I will be hiding/showing the fields to user using javscript.

3. I have a upload control in the same page which is placed under the updatepanel. When I upload the file, I will be reading the content of the file and I'm trying to load it into the controls which are outside the updatepanel. As I know the controls won't updated until unless it has been added under the updatepanel.

4. I moved all the controls outside the udpatepanel (checkboxes and textboxes) and placed it inside the updatepanel so that when the file is uploaded I can read the file and assign to the controls.

After this, I was able to assign the values to the control. However, the problem is, the state of the page (javascript hide and show) has not been retained during the postback. For example, if i have 2 checkboxes and 2 textboxes, if i click firstone, it should show the first checkbox. If I click the second checkbox, it will show the second textbox. By default, when the fresh load happens, first textbox will be shown. When I click the second checkbox (its showing the second textbox) and do the postback by uploading the file, the state gets lost and when the page load completes, it's showing the first textbox instead of showing the second textbox.

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State Management :: Persisting DropDown List Attributes Across Page Postbacks?

Oct 12, 2010

how can DropDownList attributes be persisted accross page Postbacks?

Example:

DropdownList1.AutoPostBack = True
DropdownList1.items(0).Attributes.Add("Attribute1","somevalue")

On Postback the attribute is no longer available (ie. attributes.count=0).

I tried persisting using the code below, but was unsuccessful:

Before PostBack: ViewState.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = ViewState("DDL")

This generated the error: DropDownlist is not marked as serializable.

I than tried:

Before PostBack: Session.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = Session("DDL")

This did not err but attributes were still not available.

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AJAX :: UpdatePanel Inside Master Page Performs Full Postbacks?

Jun 1, 2010

I have marquee control inside a Master page.I used timer control to refresh marquee for every 5 mins.And it is placed in update panel for implementing partial postback.

Now the problem is that,when ever timer_tick event raised it's postbacking the content pages as well.I need a solution to partial refresh of only master page.

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JQuery :: How To Reset The Page After Jquery Validation On Asyncronous Postbacks

Dec 13, 2010

I am having some problem with Jquery validation.

In my application i am using jquery validation plugin..I am using Updatepanels and i am validating using


Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(ValidateMyForm);

and ValidateMyform will validate on each button click...

var objPost = args.get_postBackElement();
if (objPost === null || objPost === undefined) return;
if (objPost.type == 'submit') {[code].....

Here I want to get back the page to normal stage(like after a full page postback)...even though after async postback the validation is still active...it should not get back to normal and its throwing errors if i enter something wrong...this is because the page is not fully refreshed on asyc postbacks...I just want get the like the normal after each asyc post back...

I tried using submit and reset to reset the page but its became to normal..the validation is still active...I have no idea what to do..

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Nov 10, 2010

Do I have some doubts in MVC and what can be developed with this?

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This is just to know that, if i developed any application in .net framework 3.5, will it run in machine which has only 4.0? If not then why not.

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Mar 22, 2011

I developed a .Net 3.5 x64 web application that includes a custom HttpHandler in the config:

<add path="*.class1" verb="GET" type="ClassLibrary1.Class1Handler"/>

This works when the platform target for ClassLibrary1 is set at x86.
However, when I set this to x64 I get the following error when I run web application starts (it compiles just fine): Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: Could not load file or assembly 'ClassLibrary1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.


Does this mean that a HttpHandler can be compiled at x86 only?That doesn't make much sense to me.Does anyone have an idea of what could be going on?Edit 1:The ClassLibrary1 project is just an empty class library project with a single HttpHandler added (which is also empty).Edit 2:I am also getting these warning messages when compiling, I am pretty sure they have something to do with this problem: Assembly generation -- Referenced assembly 'mscorlib.dll' targets a different processor HttpTestEdit 3:I manually edited the project file to force references to the x64 assemblies, like this:

<Reference Include="$(Windir)Microsoft.NETFramework64v2.0.50727System.dll"/>

This does supress the above warning message, but the problem isn't resolved.

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I have an ASP.Net Ajax application that has been built on .net 2.0. My company recently installed a brand new server which has .net 3.5 installed. Is it possible for me to host my application on this server without the .net 2.0 ?

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I have developed a data querying application for the Web, this is in a host. What steps should I take if I want this application can also be used with mobile devices.

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i have a client who wants to increase security on ERP and CMS application developed in DOT NET

We can do some testing and optimize the code. However what else can be done for more security ?

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Developed .NET MVC Web Application To Execute PowerShell Scripts?

Apr 16, 2010

I have developed an ASP.NET MVC Web Application to execute PowerShell scripts.I am using the VS web server and can execute scripts fine. However, a requirement is that users are able to execute scripts against AD to perform actions that their own user accounts are not allowed to do.Therefore I am using impersonation to switch the identity before creating the PowerShell runspace:

Runspace runspace = RunspaceFactory.CreateRunspace(config);
var currentuser = WindowsIdentity.GetCurrent().Name;
if (runspace.RunspaceStateInfo.State == RunspaceState.BeforeOpen) {
runspace.Open();
}

I have tested using a domain admin account and I get the following exception when calling runspace.Open():

Security Exception
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Exception Details: System.Security.SecurityException: Requested registry access is not allowed.

The web application is running in full trust and I have explicitly added the account I am using for impersonation to the local administrators group of the machine (even though the domain admins group was already there).I'm using advapi32.dll LogonUser call to perform the impersonation in a similar way to this post (http://blogs.msdn.com/webdav_101/archive/2008/09/25/howto-calling-exchange-powershell-from-an-impersonated-thead.aspx)

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AJAX :: Garbage Collector - Developed A Web Site By Using ASP.Net 2.0?

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Sep 28, 2010

I have a web app that I would like to convert to other dialects. I know that a language specialist would have to check it, but am I correct that I can us a tool to convert the english to spanish, chinese, etc?

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