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  • How do I get certain code to execute before every single controller action in ASP.NET MVC 2?

    - by Chris
    I want to check some things about the state of the session, the user agent, etc, and possibly take action and return a special view BEFORE a controller method gets a chance to execute. For example: Most common: User requests Home/Index System checks to make sure x != 0. x does not equal zero, so the Home/Index controller executes like normal. But, sometimes: User requests Home/Index System checks to make sure x != 0. x DOES equal zero. The user must be notified and the requested controller action cannot be allowed to execute. I think this involves the use of ActionFilters. But I have read about them and I don't understand if I can preempt the controller method and return a view before it executes. I am sure I could execute code before the controller method runs, but how do I keep it from running in some instances and return a custom view, or direct to a different controller method?

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  • C# asp.net Howto load an aspx page from another project?

    - by Martijn
    I have 2 projects. One project is a core and contains the GUI which is always the same and acts like a kind of framework. The second project is an application that must be set in the framework. The framework consists of a masterpage and a content page (application.aspx). From my second project I want to load the application.aspx. Is this possible? And if so.. how?

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  • How to handle null return from custom HttpHandler in asp.net?

    - by Campos
    I'm using a custom ashx HttpHandler to retrieve gif images from a database and show it on a website - when the image exists, it works great. However, there are cases when the image will not exist, and I'd like to have the html table holding the image to become invisible so the "image not found" icon is not shown. But since the HttpHandler is not synchronous, all my attempts checking for image size at Page_Load were frustrated. Any ideas on how this can be accomplished?

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  • By knowing VC++ MFC, how easy or difficult is to learn C#.Net?

    - by AKN
    Right now, I'm more into design & maintenance of MFC based application. I'm seeing good progress and requirement for C#.Net application. With this background knowledge, how easy or difficult is to learn C#.Net? Is there any tutorials available online that helps MFC developers to easily learn C#.Net quickly? Any help on this much appreciated!

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  • How do I restrict the WCF service called by an ASP.NET AJAX page to only allow calls for that page?

    - by NovaJoe
    I have an AjaxControlToolkit DynamicPopulate control that is updated by calls to a WCF service. I know I can check the HttpContext in the service request to see if a user of the page (and thus, the control) is authenticated. However, I don't want anyone clever to be able to call the service directly, even if they're logged in. I want access to the service to be allowed ONLY to requests that are made from the page. Mainly, I don't want anyone to be able to programatically make a large number of calls and then reverse-engineer the algorithm that sits behind the service. Any clever ideas on how this can be done? Maybe I'm over-thinking this? Thanks in advance.

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  • Javascript code in ASP.NET MVC Partial Views (ASCX) or not?

    - by Alex
    Is there a "best practice" for placing Javascript code when you have many partial views and JS code that's specific to them? I feel like I'm creating a maintenance nightmare by having many partial views and then a bunch of independent Javascript files for them which need to be synced up when there is a partial view change. It appears, for maintenance purposes, better to me to put the JS code with the partial view. But then I'm violating generally accepted practices that all JS code should be at the bottom of the page and not mixed in, and also I'd end up with multiple references to the same JS file (as I'd include a reference in each ASCX for intellisense purposes). Does anyone have a better idea? Thank you!

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  • Is Classic ADO still viable for a mixed managed/unmanaged App?

    - by Andy Dent
    We have a complex architecture with much logic in unmanaged code that needs database access. Currently this is via ODBC drivers and MFC classes and we're considering the issues of migrating our abstraction layer to use ADO or ADO.Net. In the latter case we'd have to be pushing database logic back up into the .Net layer. I'm trying to decide if the pain of invoking the database via .Net callbacks is offset by the improvements in ADO.Net. The Wikipedia comparison was interesting although I'm not sure I believe all the points in the comparison table (eg: does ADO.Net always use XML to pass data?). A 2005 comparison shows ADO.Net performing dramatically faster. Microsoft's guide to ADO.Net for ADO programmers suggests we will gain much from going to ADO.Net especially the way that data is available in native (.Net) types rather than solely through OLEAutomation's Variant.

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  • Why does my ASP.NET user control's field value reset to 0?

    - by Innogetics
    In the code below, why does the groupId value reset to 0 during Page_Load event? Maybe perhaps the AccountGrid created with groupId 1 is not the one that is loaded to the page? public partial class AccountGrid : System.Web.UI.UserControl { int groupId = 0; public AccountGrid() { } // an aspx page creates AccountGrid with "new AccountGrid(1)" public AccountGrid(int groupId) { this.groupId = groupId; } protected void Page_Load(object sender, EventArgs e) { DataAccessFacade facade = new DataAccessFacade(); // groupId resets to 0 here... grdAccount.DataSource = facade.GetAccountsByAccountGroupId(this.groupId); grdAccount.DataBind(); } } In my page, I have public partial class Default : System.Web.UI.Page { public Default() { } public void Page_Load(object sender, EventArgs e) { ctlAccountGrid = new Views.Controls.Account.AccountGrid(1); // should I do databind? ctlAccountGrid.DataBind(); } }

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  • Can I create an ASP.NET ImageButton that doesn't postback?

    - by Giffyguy
    I'm trying to use the ImageButton control for client-side script execution only. I can specify the client-side script to execute using the OnClientClick property, but how do I stop it from trying to post every time the user clicks it? There is no reason to post when this button is clicked. I've set CausesValidation to False, but this doesn't stop it from posting.

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  • ASP.net MVC How to change the Textbox Class upon validation failure?

    - by Harry
    I notice in the default MVC template project that the Account registration fields are highlighted via a class change. I can't seem to get the same behavour out of my own code (in the same project - same CSS etc) What might be stopping this from occuring? Update I believe this relates to one of my other questions Because I was having trouble with NullReferenceExceptions I have changed the Html.ValidationMessage fields to have different names than the target fields. So really, I need to resolve this question

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  • How does asp.net MVC remember my false values on postback?

    - by Michel
    Hi, This is working, but how??? I have a controller action for a post: [AcceptVerbs(HttpVerbs.Post )] public ActionResult Edit(Person person) { bool isvalid = ModelState.IsValid; etc. The Person object has a property BirthDate, type DateTime. When i enter some invalid data in the form, say 'blabla' which is obvious not a valid Datetime, it fills all the (other) Person properties with the correct data and the BirthDate property with a new blank DateTime. The bool isvalid has the value 'false'. So far so good. Then i do this: return View(p); and in the view i have this: <%= Html.TextBox("BirthDate", String.Format("{0:g}", Model.BirthDate)) %> <%= Html.ValidationMessage("BirthDate", "*") %> Ant there it comes: i EXPECTED the model to contain the new, blank DateTime because i didn't put any new data in. Second, when the View displays something, it must be a DateTime, because Model.BirthDate can't hold anything but a DateTime. But to my surprise, it shows a textbox with the 'blabla' value! (and the red * behind it) Which ofcourse is nice because the user can seee what he typed wrong, but how can that (blabla)string be transferred to the View in a DateTime field?

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  • A Better way? Finding ASP.NET controls, finding their id

    - by CSharp
    I have a method that finds all the controls, iterates through them, determines if they are a textbox,drop down list, etc.. retrieves their ID name, and depending on the ID name it will set a boolean statement (thus I would know if that section of the form is complete, and will email to a certain group of people) unfortunetly this is done with too many if statements and was wondering if I could get some help making this more manageable protected void getEmailGroup() { Control[] allControls = FlattenHierachy(Page); foreach (Control control in allControls) { if (control.ID != null) { if (control is TextBox) { TextBox txt = control as TextBox; if (txt.Text != "") { if (control.ID.StartsWith("GenInfo_")) { GenInfo = true; } if (control.ID.StartsWith("EmpInfo_")) { EmpInfo = true; } } } if (control is DropDownList) { DropDownList lb = control as DropDownList; if (lb.SelectedIndex != -1) { if (control.ID.StartsWith("GenInfo_")) { GenInfo = true; } if (control.ID.StartsWith("EmpInfo_")) { EmpInfo = true; } } } } } }

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  • How do I use Asp MVC Url Helpers to generate RESTful links?

    - by Josh
    I'm trying to use Html.ActionLink to generate a link with in this form: /Action/Model/Id/Parameter1/Parameter2 I've used: <%= Html.ActionLink("Link Text", "Action", "Model", new { id = var, parament1=var1 }, null) % but it always ends up looking like /Action/Model/Id?parameter1=variable I've seen similar questions on Stackoverflow and elsewhere, but I can't find a solution that works/makes sense. Any help would be appreciated.

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  • Where does ASP.Net get its rendered IDs from?

    - by NeilD
    Hi, I've inherited a project with some nasty JavaScript that depends on hard coded object ids. i.e. There are lots of places where it does things like this var magazine = document.getElementById('repModuleDisplay__ctl3_chkCats_0'); When the page renders in my UAT environment, the HTML looks like this, and everything works OK. <input id="repModuleDisplay__ctl3_chkCats_0" type="checkbox" name="repModuleDisplay:_ctl3:chkCats:0" ... etc However, when I put it on my Production environment, the HTML is suddenly rending like this: <input id="repModuleDisplay_ctl03_chkCats_0" type="checkbox" name="repModuleDisplay$ctl03$chkCats$0" ... etc The difference in ids means that the JavaScript can't find the Element, and fails. In an ideal world, I'd scrap the buggy JavaScript and do it again properly, but for a quick fix, I'd like to know what is causing the difference in rendering between the two environments. Does anyone have any ideas? Thanks, Neil

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  • ASP.NET javascript. Put it in code behind or put it in .aspx file?

    - by punkouter
    Why do people put javascript in the code behind ? I think it is ugly to have 100 (see below) of these.... Is there some basic reasons that javascript must be in the code behind in some instances? And when it should in the aspx. ?? // now we gotta recalc fields szCalcBenefitsTotal += " CalcCostFromPct('" + tbSocialSecurityPercent3.ClientID + "', '" + tbSocialSecurity3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbMedicarePercent3.ClientID + "', '" + tbMedicare3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbHealthInsurancePercent3.ClientID + "', '" + tbHealthInsurance3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbLifeInsurancePercent3.ClientID + "', '" + tbLifeInsurance3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbVacationPercent3.ClientID + "', '" + tbVacation3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbSickLeavePercent3.ClientID + "', '" + tbSickLeave3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');"; szCalcBenefitsTotal += " CalcCostFromPct('" + tbRetirementPercent3.ClientID + "', '" + tbRetirement3.ClientID + "', '" + tbSalaryAdjusted3.ClientID + "');";

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  • How to install ASP.NET MVC 2 templates after already installing VS Web Dev 2010 first?

    - by Lucas McCoy
    First off these questions are related but do not fix my problem: http://stackoverflow.com/questions/2499934/ http://stackoverflow.com/questions/652836/ I have installed Visual Studio Web Developer Express Edition 2010, then I installed MVC 2. Now I can successfully run a MVC 2 application, however I have to do the manual imports of the namespaces and stuff. How can I install the templates?

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  • ASP.NET. Css file in master page.

    - by w1z
    Hi All, In my application I have next problem. I created master page and some content pages, some of which are located in the nested folders. In the master page I added the link to .css file <link href="default.css" rel="stylesheet" type="text/css" /> But pages are located in the nested folders can't use this .css file. How can I fix this? I want to have one .css file for all pages (: Thanks!

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  • ASP.Net MVC 2 is it possible to get the same instance of model(with slight changes) in HttpPost meth

    - by jjjjj
    Hi I have a complex entity User: public class User : BaseEntity { public virtual Taxi Taxi { get; set; } --> That is why i call it "complex" public virtual string Login { get; set; } public virtual string Password { get; set; } } where Taxi is a parent of User (Taxi has-many Users): public class Taxi : BaseEntity { public virtual string Name { get; set; } public virtual string ClientIp { get; set; } } BaseEntity consists of public virtual int Id { get; private set; } The problem occurs while trying to edit User [Authorize] public ActionResult ChangeAccountInfo() { var user = UserRepository.GetUser(User.Identity.Name); return View(user); } My ChangeAccountInfo.aspx <fieldset> <legend>Fields</legend> <% %> <div class="editor-label"> <%: Html.LabelFor(model => model.Login) %> </div> <div class="editor-field"> <%: Html.TextBoxFor(model => model.Login) %> <%: Html.ValidationMessageFor(model => model.Login) %> </div> <div class="editor-label"> <%: Html.LabelFor(model => model.Password) %> </div> <div class="editor-field"> <%: Html.TextBoxFor(model => model.Password) %> <%: Html.ValidationMessageFor(model => model.Password) %> </div> <div class="editor-field"> <%: Html.HiddenFor(model => model.Taxi.Name)%> </div> <p> <input type="submit" value="Save" /> </p> </fieldset> Post changes: [Authorize] [HttpPost] public ActionResult ChangeAccountInfo(User model) { if (ModelState.IsValid) { UserRepository.UpdateUser(model); return RedirectToAction("ChangeAccountInfoSuccess", "Account"); } return View(model); } But, the (User model) parameter has User.Id == 0 -- User entity had 5 before edit User.Login == "my new login" User.Password == "my new password" User.Taxi.Id == 0 -- User.Taxi entity had 3 before edit User.Taxi.Name == "old hidden name" User.Taxi.ClientIp == null -- User entity had 192.168.0.1 before edit Q: Is it possible not to mark all the fields of an entity (that should be in my UpdateUser) with tag "hidden" but still have them unchanged in my HttpPost method? e.g. not User.Taxi.ClientIp = null, but User.Taxi.ClientIp = 192.168.0.1 I'm using nhibernate, if it matters.

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