Mvc 2 Validation Always Shows Errors On Initial Page Load
May 14, 2010
I've searched around a lot, and honed this problem down to this case: I'm using the PRG pattern, pragmatically I'm using the same DTO for my post/get actions. It looks like when I have the dto with the data annotation attributes in the get action parameter list, the validation is always displaying errors, every time on initial page load. In some cases this could be desired behavior if you put asterisks in the error message, but how do I get rid of it?
I am a more than a little confussled, my build succeeds with no errors but when I run without debugging only my error page shows up? I tried switching the custom errors to "Off" but it still shows up the error page.
I'm writing a simple web site using codebehind for each page, however using the "codefile" directive, not "codebehind" as such, because I'm not precompiling. I'm just using a text editor to edit the aspx and codebehind files. Problem is, every time I make a change to the code or the aspx file, and refresh the page in the browser, it takes a 2 or 3 seconds to come up the first time, like it's doing an on-demand initial compile. I assume that's what it's doing, as after the initial load, the page refreshes without any delay at all.
This behaviour is quite frustrating when making small changes to the html or code. I'm coming from classic ASP, where you could edit-refresh-edit-refresh etc. all day without your "stride" being broken by waiting for a "compile", you know? So I'd love to know if there's a setting which prevents this initial delay. When I want to deploy, I can do a compile or something, but while making lots of small edits, I just need the page to run without that initial delay.
I have this simple code in my page, I have a long page, if the client use this button then it shall reload the page and display the page from the beginning. I wish to be reload the page and display from the last position.
I posted a similar question previously, but none of the answers worked and I've been scouring all over the web trying to find a solution. My situation, I have a Edit Window webform with a dropdownlist (Note: to avoid confusion, I'm using Telerik extensions only to decorate the webform):
And in the code behind, I'm setting the datasource for the dropdownlist and using a function to query the DB for the name of the value I want to set as the selected value when the page loads initially: Partial Class EditFormVB Inherits System.Web.UI.Page
Public Shared category_Name As String = "" Dim ddlDataSource As New SqlDataSource Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init DetailsView1.DefaultMode = DetailsViewMode.Edit End Sub Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Me.Page.Title = "Editing record" ''Setup DropDownList SqlDataSource ddlDataSource.ID = "ReqCategoryData" Page.Controls.Add(ddlDataSource) ddlDataSource.ConnectionString = ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString ddlDataSource.SelectCommand = "SELECT TS_NAME AS ReqCategory FROM dbo.TS_SELECTIONS WHERE (TS_FLDID = 5299 AND TS_STATUS = 0) ORDER BY TS_NAME" Dim args As New DataSourceSelectArguments ddlDataSource.Select(args) ''Set max length of Title field to 70 characters Dim dvrTest As DetailsViewRowCollection = DetailsView1.Rows Dim TitleTB As TextBox = dvrTest.Item(0).Cells(1).Controls(0) TitleTB.Attributes.Add("onkeydown", "isMaxLen(this)") TitleTB.Attributes.Add("maxlength", "70") Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown") ''Perform dropdown list population operations If Page.IsPostBack = False Then Dim ticket_ID As String = getDataKey(DetailsView1) ''Fetch Category ID Dim sqlText As String = "SELECT TS_REQCATEGORY FROM USR_ITFAC WHERE (TS_ID = " + ticket_ID + ") " Dim reqDataReader As SqlDataReader = GetDataReader(sqlText) reqDataReader.Read() Dim category_ID As String = reqDataReader(0) ''Fetch Category name using the categoryID and set as selected value in dropdown list sqlText = "SELECT TS_NAME FROM TS_SELECTIONS WHERE (TS_ID = " + category_ID + ") " reqDataReader = GetDataReader(sqlText) reqDataReader.Read() category_Name = reqDataReader(0) myDDL.DataBind() myDDL.Selectedvalue = category_Name //<--this value gets set only when debugging, End If End Sub Private Function GetDataReader(ByVal sqlText As String) As SqlDataReader Dim dr As SqlDataReader Dim sqlConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString) sqlConn.Open() Dim sqlCmd As SqlCommand = New SqlCommand(sqlText, sqlConn) dr = sqlCmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection) Return dr End Function End Class
The dropdownlist does get populated appropriately, however when I attempt to set the value, it doesn't reflect when the page loads; the dropdownlist just gets populated and no value is set to selected in the markup, so the first value is shown by default. The odd thing is that when I'm debugging, the value appears to get set when I step through the function, it's as if the selectedvalue is getting reset as soon as the function exits and proceeds to load the page.
SOLUTION: Had to add a separate function that is called onLoad from the DropDownList after the after Page_Load is done executing. Still unresolved is why the the DropDownList rebinds after the Page_Load.
IN HTML: <asp:DropDownList DataSourceID="ReqCategoryData" DataTextField="ReqCategory" DataValueField="ReqCategory" ID="reqCategoryDropDown" runat="server" AutoPostBack="true" OnLoad="DDL_DataBound"> IN CODE-BEHIND Public Shared category_Name As String = "" Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Me.Page.Title = "Editing record" ''Setup DropDownList SqlDataSource ddlDataSource.ID = "ReqCategoryData" Page.Controls.Add(ddlDataSource) ddlDataSource.ConnectionString = ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString ddlDataSource.SelectCommand = "SELECT TS_NAME AS ReqCategory FROM dbo.TS_SELECTIONS WHERE (TS_FLDID = 5299 AND TS_STATUS = 0) ORDER BY TS_NAME" Dim args As New DataSourceSelectArguments ddlDataSource.Select(args) ''Set max length of Title field to 70 characters Dim dvrTest As DetailsViewRowCollection = DetailsView1.Rows Dim TitleTB As TextBox = dvrTest.Item(0).Cells(1).Controls(0) TitleTB.Attributes.Add("onkeydown", "isMaxLen(this)") TitleTB.Attributes.Add("maxlength", "70") Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown") ''Perform dropdown list population operations If Page.IsPostBack = False Then Dim ticket_ID As String = getDataKey(DetailsView1) ''Fetch Category ID Dim sqlText As String = "SELECT TS_REQCATEGORY FROM USR_ITFAC WHERE (TS_ID = " + ticket_ID + ") " Dim reqDataReader As SqlDataReader = GetDataReader(sqlText) reqDataReader.Read() Dim category_ID As String = reqDataReader(0) ''Fetch Category name using the categoryID and set as selected value in dropdown list sqlText = "SELECT TS_NAME FROM TS_SELECTIONS WHERE (TS_ID = " + category_ID + ") " reqDataReader = GetDataReader(sqlText) reqDataReader.Read() category_Name = reqDataReader(0) myDDL.DataBind() End If End Sub Protected Sub DDL_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) If Page.IsPostBack = False Then Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown") myDDL.Items.FindByValue(category_Name).Selected = True End If End Sub
about how many are using jQuery to create controls in the DOM after the initial page load.Curious also about any conventions for naming DOM objects in relation to database objects.Seems you could almost render the entire page using jQuery..Does that mean I am only using ASP.Net for the fact that my page methods will run in IIS on the web server?
I have an application that initially display 4 grid views at page load. This process takes 50-60 seconds and I would like to change the process to display the web page, show message like "Data being loaded, please wait..." and then spin off a thread that fills the various grid view. When this is done I would programatically like to do a post back to show the result. Not sure if this is possible? I tried something like this:
I am not sure what I am doing wrong in how I set up validation on my models and viewmodels. For some reason on several of my views that contain a validation summary, it appears empty on initial load of the page. On some other pages it appears correctly when the form's data is posted and it does not appear on initial load, this is the way that I would expect it to work.
On the views where this is occuring, my viewmodels are somewhat more complex in that they contain another complex type that I am passing around that has it's own set of DataAnnotation Validation properties, but I have called the validation summary like this; Html.ValidationSummary(true) so that those properties are not validated.
I a formview object. I have created an edit temple and an empty template Whehn there is data in the table nor probem When my table is empty i got the empty template to display when I click insert I get the error " Form must be in insert mode" How can I tell if there is no data on the page load so I can maybe do this:
Over the last week I've been investigating an issue for one of our clients whereby the initial page load following a deployment of their website takes around 1 minute, resulting in unacceptable downtime for end users. This was happening not only for code deplyments (bin dll's and .config files) but also if there were large numbers of .aspx pages updated. For code deployments it's not an issue, but for aspx updates it is; in this particular scenario, we are making use of a 3rd party content management system (RedDot from OpenText) in which every page of the site is published out as a distinct .aspx page. This means that for this website there's somewhere in the region of 2,400 separate .aspx pages. I realise this isn't an ideal situation but we're working within the constraints of the CMS, and we managed to correlate the instances where the site was unresponsive with App pool restarts, which also corresponded to publications of of .aspx pages.
I found an article by Tess Ferandez [URL] which describes all the reasons why the app pool may restart, and it does seem that if more than 15 .aspx pages are changed then the app pool will recycle and the pages will be re-compiled. Another msdn article [URL] then gave me a few pointers on how to start addressing this problem, and for the moment I've set a flag on the compilation options to prevent batch compilation:
<compilation batch="false">
This means that the initial page load now takes around 6 seconds instead of 1 minute, which is a great improvement. However, I also used the "Compilations Total" performance counter to investigate the number of pages that have been compiled by ASP.NET for my site and was quite surprised that the total number of pages that get compiled peaks at 44, which is odd given that there are 2,400 aspx pages in the site. If the batch flag is set to false, the counter slowly increments by 1 page at a time as you click around on the site; if batch mode is true, the initial compilation takes the number straight to 44 over the course of ~60 seconds. What I'm really struggling to understand is why all 2,400 pages aren't compiled. Does anyone have any inside info on what might be going on as all the documentation I've read seems to indicate that all of the pages should be compiled and this counter should be much higher.
I have serveral long ASP.Net pages, I use RequiredFieldValidator, RegularExpressionValidator and ValidatorCalloutExtender for validations, Submit buttons are typically at the bottom of the pages. The problem I have: if the errors happen at the top portion of the page when Submit buttons are clicked, the forms do not scroll to the top automatically, the users have to scroll up to see the ValidatorCalloutExtender.
I have a couple of pages with standard asp.net validation controls such as RequiredFieldValidator etc inside my RadAjaxPanel.As soon as I navigate to another tab in my RadTabStrip the page seems to force validation errors and pretty much "locks" the page even though non of the fields was selected to enter data.Only once all the required fields was entered the page seems to release the "lock" and only then am I able to navigate to another tab / page without even submitting the page.
what might be causing the "lock" and forced validation errors on the page?
I am trying to setup a notification bar that shows errors when trying to login. I am using MySql as a backend.
Here is the aspx:
[Code]....
Here is the code behind:
[Code]....
I am not sure if I am over thinking what I am trying to do or what. I was able to get it to show the notification bar but it wouldn't show correctly and then somehow it wouldn't let me login.
The above code is what I came up with after reading some articles, which doesn't work. When stepping through the code, I get an "Input string was not in the correct format" error. I think the reason I get that error is because the password format is "Encrypted".
Either way I try it I can't get the bar to show up with the error, or actually login (I am sure I can remove everything that I 'tried' and it would work.
I have an application where different users can log in via a single portal login. When they log in, if they belong to more than 1 company they have to select the company they belong to. The theme will change if there is a custom theme for that company. Each page my application has inherits a "CustomPage" class. Here is the code for the custom page:
When the customer belongs to more than 1 company, and they select the company they belong to, the theme loads just fine. So, the problem I am having is this: If they belong to just 1 company, the company is automatically selected but the theme does not load right away. However, if I refresh the page, the theme loads just fine. Even the default theme will not load. The page has no css at all until I refresh.
I even view source and look for my css names and they are not there. I refresh and do the same thing, and they are there. I am not using forms authentication and the default theme in the web config is "Default"
I've stumbled across a strange problem with the AsyncFileUpload control: if the control doesn't exist on the initial load, the UploadedComplete event does not fire. For example, the following code works just fine:
[Code]....
But as soon as the code is wrapped in an if (IsPostBack) condition as shown below, FileUploaded no longer fires, even though the code is otherwise identical:
[Code]....
Would anyone be able to shed some light on why this is happening?
I have a hybrid ASP.Net web forms/MVC app. On one of the MVC "pages"/views, I have it render a bunch of dates using the ToShortDateString() and ToLongDateString(). These work correctly most of the time, but the first time I load the view after compiling the app, they are formatted incorrectly.
I traced this down and checked the current thread's culture. For 99% of the time it's en-US, but on the first load of the MVC view after compiling it is set to en-GB. If I reload the page immediately after that, it's back to en-US.
I have tried setting the culture and uiculture in the web.config file to en-US to force it to be correct, but no luck.
I have a simple web application that loads very slow the very first time after i deploy it. I am using ASP.NET 3.5 SP1 / VS 2008 / Linq / Web forms to load the default.aspx home page. It is a very light page with nothing too fancy.Now to debug this load issue, I logged all the events in the global file and got the following log text:
Now my question is, between the Application_AuthenticateRequest and Session_Start functions, there is generally around 10 - 15 seconds - which i believe seems to be the problem.The thing, I am unsure why this is slow between these two functions.I am not using any forms authentication.Also, I am not doing anything fancy in the global file besides setting a session variable.
For some reason my RadComboBox "EmptyMessage" is not showing on the initial load of the page but it does after I focus and blur out of the control. How can I force my "EmptyMessage" to show by default?
On my Page_Load command for a page, I have a couple of tests that are performed before the screen is displayed with an alert box displaying if the user cannot access the screen. If Not Page.IsPostBack Then
I have several divs on an asp page. All of my divs are runat="server". On the initial load of my page I set all the divs visible property to false because I dont want them to appear on the first show. Then, I have a drop down list raising postback events.
On the selected index changed event I am setting the visible property of my divs to true to make them appear on the page. However this does not work.
I discovered that, on the initial load non of my divs are added to the page's html content. So, on a postback event non existing divs can not be made to appear. If all the divs would set to visible = true on the initial load, postback event would work just expected.
Could any one tell me a way to hide divs on the initial load and make them appear on a postback event?
To this Redirect.aspx page, I'm directed from some external page. In the request context, I have APP_ID key, which is passed from this external page. Next, I want to pass this APP_ID value using POST to some other page, which is defined in the configuration. Unfortunately, I'm getting such error while redirecting:
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
I don't want to disable view state validation (<pages enableViewStateMac="false">) because this is not the "solution" I want to apply.
Besides I don't understand why I'm getting such an error. Can someone get me through this ? Is there any other way to automatically submit a form on Page_Load event ?
I'm going to do a project soon for a photographer. There will be a number of pages that will have a photo album or slideshow on them. I'm trying to figure out the best way to have this site perform well and the best way to get the images on the client in the background.
I'm hoping to have the slide shows for the other pages load in the back ground after the home page loads. I thought this would not affect the loading of the home page and decrease the amount of time it would take for the other subsequent pages to load.
AJAX seems like a good fit for this with the async calls. I'm thinking about using an async call to fetch and cache the other images and/or slideshows.
Is this a good way to do this? Is there a better way of doing this? Would it be better to have anew thread do the caching to the client?
