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• lvm disappeared after disc replacement on raid10

  - by user142295

  here my problem: I am running ubuntu 12.04 on a raid10 (4 disks), on top of which I installed an lvm with two volume groups (one for /, one for /home). The layout of the disks are as follows: Disk /dev/sda: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0003f3b6 Device Boot Start End Blocks Id System /dev/sda1 * 63 481949 240943+ 83 Linux /dev/sda2 481950 2910640634 1455079342+ fd Linux raid autodetect /dev/sda3 2910640635 2930272064 9815715 82 Linux swap / Solaris Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00069785 Device Boot Start End Blocks Id System /dev/sdb1 63 2910158684 1455079311 fd Linux raid autodetect /dev/sdb2 2910158685 2930272064 10056690 82 Linux swap / Solaris Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 63 2910158684 1455079311 fd Linux raid autodetect /dev/sdc2 2910158685 2930272064 10056690 82 Linux swap / Solaris Disk /dev/sdd: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000f14de Device Boot Start End Blocks Id System /dev/sdd1 63 2910158684 1455079311 fd Linux raid autodetect /dev/sdd2 2910158685 2930272064 10056690 82 Linux swap / Solaris The first disk (/dev/sda) contains the /boot partition on /dev/sda1. I use grub2 to boot the system off this partition. On top of this raid10 I installed two volume groups, one for /, one for /home. This system worked well, I even exchanged two disks during the last two years. It always worked. But not this time. For the first time, /dev/sda broke. I do not know if this is an issue – I know I would have struggled anyways to overcome the problem with /boot installed on that disk and grub2 installed on the mbr of /dev/sda. Anyways, I did what I always did: start knoppix fire up the raid sudo mdadm --examine -scan which returns ARRAY /dev/md127 UUID=0dbf4558:1a943464:132783e8:19cdff95 start it up sudo mdadm --assemble /dev/md127 fail the failing disk (smart event) sudo mdadm /dev/md127 --fail /dev/sda2 remove the failing disk sudo mdadm /dev/md127 --remove /dev/sda2 stop the raid sudo mdadm -S /dev/md127 take out the disk replace it with a new one create the same partitions as on the failling one add it to the raid sudo mdadm --assemble /dev/md127 sudo mdadm /dev/md127 --add /dev/sda2 wait 4 hours All looks fine: cat /proc/mdstat returns: Personalities : [raid10] md127 : active raid10 sda2[0] sdd1[3] sdc1[2] sdb1[1] 2910158464 blocks 64K chunks 2 near-copies [4/4] [UUUU] unused devices: <none> and sudo mdadm --detail /dev/md127 returns /dev/md127: Version : 0.90 Creation Time : Wed Jun 10 13:08:46 2009 Raid Level : raid10 Array Size : 2910158464 (2775.34 GiB 2980.00 GB) Used Dev Size : 1455079232 (1387.67 GiB 1490.00 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 127 Persistence : Superblock is persistent Update Time : Thu Mar 21 16:27:40 2013 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : near=2 Chunk Size : 64K UUID : 0dbf4558:1a943464:132783e8:19cdff95 (local to host Microknoppix) Events : 0.4824680 Number Major Minor RaidDevice State 0 8 2 0 active sync /dev/sda2 1 8 17 1 active sync /dev/sdb1 2 8 33 2 active sync /dev/sdc1 3 8 49 3 active sync /dev/sdd1 However, there is no trace of the volume groups. Rebooting into knoppix does not help Restarting the old system (I actually replugged and re-added the failing disk for that – the system begins to start, but then fails to see the / partition – no wonder if the volume group is gone) does not help. sudo vgscan, sudo vgdisplay, sudo lvs, sudo lvdisplay, sudo vgscan –mknodes all returned No volume groups found. I am completely at a loss. Can anyone tell me if and how I can recover my data? Thanks in advance!

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• ASP.NET MVC Html.RouteLink

  - by gilbertc

  I am trying to understand what this RouteLink does. Say, in my Global.asax, I have the default route for MVC routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = "" } // Parameter defaults ); and on a View page, I do <%=Html.RouteLink("Dinners", "Default", new { controller="Dinners", action="Details", id="1"} %> Why it does not generate the link /Dinners/Details/1 but thrown an exception? Thanks. Gil.

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• Ajax comments form in ASP.NET MVC2

  - by Artiom Chilaru

  I've been playing around with different aspects of MVC for some time now, and I've reached a situation where I'm not sure what would be the best way to solve a problem. I'm hoping that the SO community will help me out here :P I've seen a number of examples of Ajax.BeginForm on the internet, and it seems like a very nifty idea. E.g. you have a dropdown where you select a customer - and on selecting one it will load this client's details in some placeholder on the page. This works perfectly fine. But what to do if you want to tie in some validation in the box? Just hypothetically, imagine an article page, and user comments in the bottom. Below the comments area there's an ajax-y "Add comment" box. When a user adds a comment, it will appear in the comments area, below the last comment there. If I set the Ajax.BeginForm to Append the result of the call to the Comments area, it will work fine. But what if the data posted is not valid? Instead of appending a "successful" comment to the comments area I have to show the user validation errors. At this point I decided that the area INSIDE the Ajax.BeginForm will be inside a partial, and the form's submits will return this partial. Validation works fine. On each submit we reload the contents inside the form element. But how to add the successful comment to the top? Other things to consider: The comment form also has a "Preview" button. When the user clicks on Preview, I should load the rendered comment into a preview box. This will probably be inside the form area as well. I was thinking of using Json results instead. When the user submits the form, the server code will generate a Json object with a Success value, and html rendered partials as some properties. Something like { "success": true, "form": "<html form data>", "comment": "successful comment html to inject into the page" } This would be a perfect solution, except there's no way in MVC to render a partial into a string, inside the controller (separation of context, remember?). So.. what should I do then? Any "correct" way to implement this?

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• ASP.NET MVC Routing - Redirect to aspx?

  - by bmoeskau

  This seems like it should be easy, but for some reason I'm having no luck. I'm migrating an existing WebForms app to MVC, so I need to keep the root of the site pointing to my existing aspx pages for now and only apply routing to named routes. Here's what I have: public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.IgnoreRoute("{resource}.aspx/{*pathInfo}"); RouteTable.Routes.Add( "Root", new Route("", new DefaultRouteHandler()) ); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Calendar2", action = "Index", id = "" } // Parameter defaults ); } So aspx pages should be ignored, and the default root url should be handled by this handler: public class DefaultRouteHandler : IRouteHandler { public IHttpHandler GetHttpHandler(RequestContext requestContext) { return System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath( "~/Dashboard/default.aspx", typeof(Page)) as IHttpHandler; } } This seems to work OK, but the resulting YPOD gives me this: Multiple controls with the same ID '__Page' were found. Trace requires that controls have unique IDs. which seems to imply that the page is somehow getting rendered twice. If I simply type in the url to my dashboard page directly it works fine (no routing, no error). I have no idea why the handler code would be doing anything differently. Bottom line -- I'd like to simply redirect the root url path to an aspx of my choosing -- can anyone shed some light?

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• ASP.NET MVC 2 - Html.DropDownList not working in an AJAX form

  - by Jacob

  I am trying to create an MVC 2 solution and I have run into the following problem: Index.aspx: <% using(Ajax.BeginForm("Forms", new AjaxOptions{UpdateTargetId="form", HttpMethod="POST"})) { %> <h3>Input: </h3> <p><%= Html.DropDownList("dropDown")%> <input type="submit" value="Select Mission" /></p> <% } %> HomeController.cs: public ActionResult Index() { var list = new [] { "item1", "item2", "item3" }; ViewData["dropDown"] = new SelectList(list); return View(); } public ActionResult Forms(string dropDown) { if (dropDown == null || dropDown == "") ViewData["txt"] = "Ahhh..."; else ViewData["txt"] = "You entered: " + dropDown; return PartialView("Form", dropDown); } Form.ascx: <%: ViewData["txt"] % This does not work. However, the whole thing does work if I use an Html.TextBox instead. For example: <div id="form"> <% using(Ajax.BeginForm("Forms", new AjaxOptions{UpdateTargetId="form", HttpMethod="POST"})) { %> <h3>Input: </h3> <%= Html.TextBox("textBox") %> <input type="submit" value="Select Mission" /></p> <% } %> </div> (and refactor the method in the controller so that it's argument is textBox instead of dropDown). My question is why does the AJAX form work for an Html.TextBox, but not for an Html.DropDownList, or what am I doing wrong? My only idea is that maybe the argument in the controller is not supposed to be of type string when using a DropDownList, but this is really just a guess. Thanks in advance.

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• ASP.NET Membership with two providers cant use GetAllUsers method

  - by Bayonian

  Hi, I'm using two membership providers. When I declared a following statement Dim allUsers As MembershipUserCollection = Membership.Providers("CustomSqlRoleManager").GetAllUsers Then, it gave me this error message. Argument not specified for paramenter 'totalRecords' of 'Public MustOverride Function GetAllUsers(pageIndex as Integer, pageSize as Integer, ByRef totalRecords as Integer) As System.Web.Security.MembershipUserCollection' Then, I added what it asked for like this : Dim allUsers As MembershipUserCollection = Membership.Providers("CustomSqlRoleManager").GetAllUsers(1, 50, 100) I don't get anything in return. I debugged it and allUsers = Nothing. What's wrong the declaration above? Do I really have to provider the paramenters when calling Membership.Providers("CustomSqlRoleManager").GetAllUsers? Update 1 If, I used the statement below: Dim allUsers As MembershipUserCollection = Membership.Providers("MembershipRoleManager").GetAllUsers(0, 0, totalUser) I got this error message: The pageSize must be greater than zero. Parameter name: pageSize. [ArgumentException: The pageSize must be greater than zero. Parameter name: pageSize] System.Web.Security.SqlMembershipProvider.GetAllUsers(Int32 pageIndex, Int32 pageSize, Int32& totalRecords) +1848357 But it works if I provied the pageSize param: Dim pageSize As Integer = GetTotalNumberOfUser() Dim allUsers As MembershipUserCollection = Membership.Providers("MembershipRoleManager").GetAllUsers(0, pageSize, totalUser) This statment Dim pageSize As Integer = GetTotalNumberOfUser() returns the total counted record, it's already round trip to database, just to get the total number of users, because I need to provide the pageSize param value.

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• .NET Build Process

  - by Nix

  All I am looking for the best free set of tools to be used in a MS Based build process. Checkout, Build, Package, Test, Deploy, etc. I know this question has been asked before but it was over 2 years ago, and in our world that is an eternity. I am looking to develop a pattern that is easily adapted to similar projects. Almost like a template/cookie cutter system. I am currently looking into using CruiseControl, Powershell, MSBuild suite of tools. If we choose to move to 4.0 will we have issues? Are there better alternatives? Limitations ? Or will these pretty much meet my needs. One piece that i am never happy with is the process of packaging. We actually have opted in the past to just use Visual Studio Deployment Projects but those are very* ancient and my fear is WIX will be too complicated for the people implementing it.

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• Asp.Net MVC - Rob Conery's LazyList - Count() or Count

  - by Adam

  I'm trying to create an html table for order logs for customers. A customer is defined as (I've left out a lot of stuff): public class Customer { public LazyList<Order> Orders { get; set; } } The LazyList is set when fetching a Customer: public Customer GetCustomer(int custID) { Customer c = ... c.Orders = new LazyList<Order>(_repository.GetOrders().ByOrderID(custID)); return c; } The order log model: public class OrderLogTableModel { public OrderLogTableModel(LazyList<Order> orders) { Orders = orders; Page = 0; PageSize = 25; } public LazyList<Order> Orders { get; set; } public int Page { get; set; } public int PageSize { get; set; } } and I pass in the customer.Orders after loading a customer. Now the log i'm trying to make, looks something like: <table> <tbody> <% int rowCount = ViewData.Model.Orders.Count(); int innerRows = rowCount - (ViewData.Model.Page * ViewData.Model.PageSize); foreach (Order order in ViewData.Model.Orders.OrderByDescending(x => x.StartDateTime) .Take(innerRows).OrderBy(x => x.StartDateTime) .Take(ViewData.Model.PageSize)) { %> <tr> <td> <%= order.ID %> </td> </tr> <% } %> </tbody> </table> Which works fine. But the problem is evaluating ViewData.Model.Orders.Count() literally takes about 10 minutes. I've tried with the ViewData.Model.Orders.Count property instead, and the results are the same - takes forever. I've also tried calling _repository.GetOrders().ByCustomerID(custID).Count() directly from the view and that executes perfectly within a few ms. Can anybody see any reason why using the LazyList to get a simple count would take so long? It seems like its trying to iterate through the list when getting a simple count.

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• ASP.NET MVC 2 client-side validation rules not being created

  - by Brant Bobby

  MVC isn't generating the client-side validation rules for my viewmodel. The HTML just contains this: <script type="text/javascript"> //<![CDATA[ if (!window.mvcClientValidationMetadata) { window.mvcClientValidationMetadata = []; } window.mvcClientValidationMetadata.push({"Fields":[],"FormId":"form0","ReplaceValidationSummary":false}); //]]> </script> Note that Fields[] is empty! My view is strongly-typed and uses the new strongly-typed HTML helpers (TextBoxFor(), etc). View Model / Domain Model public class ItemFormViewModel { public Item Item { get; set; } [Required] [StringLength(100)] public string Whatever { get; set; } // for demo } [MetadataType(typeof(ItemMetadata))] public class Item { public string Name { get; set; } public string SKU { get; set; } public int QuantityRequired { get; set; } // etc. } public class ItemMetadata { [Required] [StringLength(100)] public string Name { get; set; } [Required] [StringLength(50)] public string SKU { get; set; } [Range(0, Int32.MaxValue)] public int QuantityRequired { get; set; } // etc. } (I know I'm using a domain model as my / as part of my view model, which isn't a good practice, but disregard that for now.) View <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ItemFormViewModel>" %> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2>Editing item: <%= Html.Encode(Model.Item.Name) %></h2> <% Html.EnableClientValidation(); %> <%= Html.ValidationSummary("Could not save the item.") %> <% using (Html.BeginForm()) { %> <%= Html.TextBoxFor(model => model.Item.Name) %> <%= Html.TextBoxFor(model => model.Item.SKU) %> <%= Html.TextBoxFor(model => model.Item.QuantityRequired) %> <%= Html.HiddenFor(model => model.Item.ItemID) %> <%= Html.TextBox("Whatever", Model.Whatever) %> <input type="submit" value="Save" /> <% } %> </asp:Content> I included the Whatever property on the view model because I suspected that MVC wasn't recursively inspecting the sub-properties of ItemFormViewModel.Item, but even that isn't being validated? I've even tried delving into the MVC framework source code but have come up empty. What could be going on?

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• help me with asp.net mvc 2 custom validation attribute

  - by Omu

  I'm trying to write a validation attribute that is going to check that at least one of the specified properties is true [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)] public sealed class AtLeastOneTrueAttribute : ValidationAttribute { private const string DefaultErrorMessage = "select at least one"; public AtLeastOneTrueAttribute(params string[] props) : base(DefaultErrorMessage) { this.props = props; } private readonly string[] props; public override string FormatErrorMessage(string name) { return DefaultErrorMessage; } public override bool IsValid(object value) { var properties = TypeDescriptor.GetProperties(value); return props.Any(p => (bool) properties.Find(p, true).GetValue(value)); } } now when I'm trying to use I can't really get specify the props after the fir , the intellisence shows me that I'm entering the ErrorMessage and only the first string is the params string[] props

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• Altering the ASP.NET MVC 2 ActionResult on HTTP post

  - by Inge Henriksen

  I want to do some processing on a attribute before returning the view. If I set the appModel.Markup returned in the HttpPost ActionResult method below to "modified" it still says "original" on the form. Why cant I modify my attribute in a HttpGet ActionResult method? [HttpGet] public ActionResult Index() { return View(new MyModel { Markup = "original" }); } [HttpPost] public ActionResult Index(MyModel appModel) { return View(new MyModel { Markup = "modified" }); }

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• Asp.net mvc json

  - by user310657

  Hi, I am working on a mvc project, and having problem with json. i have created a demo project with list of colors public JsonResult GetResult() { List strList = new List(); strList.Add("white"); strList.Add("blue"); strList.Add("black"); strList.Add("red"); strList.Add("orange"); strList.Add("green"); return this.Json(strList); } i am able to get these on my page, but when i try to delete one color, that is when i send the following using jquery function deleteItem(item) { $.ajax({ type: "POST", url: "/Home/Delete/white", data: "{}", contentType: "application/json; charset=utf-8", success: ajaxCallSucceed, dataType: "json", failure: ajaxCallFailed }); } the controler action public JsonResult Delete(string Color) {} Color always returns null, even if i have specified "/Home/Delete/white" in the url. i know i am doing something wrong or missing something, but not able to find out what. please can any one guide me in the right direction.

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• Asp.net: Replace GenericPrincipal

  - by Pickels

  Hello, I was wondering what the best way is to replace the genericPrincipal with my own CustomGenericPrincipal. At the moment I have something like this but I aint sure if it's correct. protected void Application_AuthenticateRequest(Object sender, EventArgs e) { HttpCookie authCookie = Request.Cookies[FormsAuthentication.FormsCookieName]; if (authCookie != null) { FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value); var identity = new CustomIdentity(authTicket); var principal = new CustomPrincipal(identity); Context.User = principal; } else { //Todo: check if this is correct var genericIdentity = new CustomGenericIdentity(); Context.User = new CustomPrincipal(genericIdentity); } } I need to replace it because I need a Principal that implements my ICustomPrincipal interface because I am doing the following with Ninject: Bind<ICustomPrincipal>().ToMethod(x => (ICustomPrincipal)HttpContext.Current.User) .InRequestScope(); So what's the best way to replace the GenericPrincipal? Thanks in advance, Pickels

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• remove dead routes in asp.net mvc 2

  - by loviji

  hello, i have get a problem. The request for 'Account' has found the following matching controllers: uqs.Controllers.Admin.AccountController MvcApplication1.Controllers.AccountController I search in project by Visual Studio MvcApplication1.Controllers.AccountController to remove it. but can't find match. So, I try to register a route: routes.MapRoute( "LogAccount", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "AccountController", action = "LogOn", id = "" }, new string[] { "uqs.Controllers.Admin" } // Parameter defaults ); But can't solve problem. Multiple types were found that match the controller named 'Account'. How I can Remove MvcApplication1.Controllers.AccountController. or fix this problem? Thanks.

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• Calling ASP.NET MVC Controller explicitly via AJAX

  - by effkay

  I know that I can use following piece of code to refresh a div: <%=Ajax.ActionLink( "Update", "Administration", new AjaxOptions { UpdateTargetId = "grid", LoadingElementId = "grid-wait" } ) %> But this creates a link; user will have to click on it to get the view refreshed. How can I make it automatic, i.e., like say if I want the grid to be refreshed after every five seconds?

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• ASP.NET with MS Chart disable the vertical line

  - by Bayonian

  Hi, I have a graph created with MS Chart like the following picture. As you can see the vertical lines are messed up with value of the top of each bar. Here's the mark-up for the graph: <asp:Chart ID="chtNBAChampionships" runat="server"> <Series> <asp:Series Name="Championships" YValueType="Int32" ChartType="Column" ChartArea="MainChartArea" IsValueShownAsLabel="true"> <Points> <asp:DataPoint AxisLabel="Celtics" YValues="17" /> <asp:DataPoint AxisLabel="Lakers" YValues="15" /> <asp:DataPoint AxisLabel="Bulls" YValues="6" /> <asp:DataPoint AxisLabel="Spurs" YValues="4" /> <asp:DataPoint AxisLabel="76ers" YValues="3" /> <asp:DataPoint AxisLabel="Pistons" YValues="3" /> <asp:DataPoint AxisLabel="Warriors" YValues="3" /> </Points> </asp:Series> </Series> <ChartAreas> <asp:ChartArea Name="MainChartArea"> </asp:ChartArea> </ChartAreas> </asp:Chart> I don't want the display the vertical line because it's messed up with the value on top of the each bar. How can I disable the vertical line? Thank you.

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• Site Security/Access management for asp.net mvc application

  - by minal

  I am trying to find a good pattern to use for user access validation. Basically on a webforms application I had a framework which used user roles to define access, ie, users were assigned into roles, and "pages" were granted access to a page. I had a table in the database with all the pages listed in it. Pages could have child pages that got their access inherited from the parent. When defining access, I assigned the roles access to the pages. Users in the role then had access to the pages. It is fairly simple to manage as well. The way I implemented this was on a base class that every page inherited. On pageload/init I would check the page url and validate access and act appropriately. However I am now working on a MVC application and need to implement something similar, however I can't find a good way to make my previous solution work. Purely because I don't have static pages as url paths. Also I am not sure how best to approach this as I now have controllers rather then aspx pages. I have looked at the MVCSitemapprovider, but that does not work off a database, it needs a sitemap file. I need control of changing user persmissions on the fly. Any thoughts/suggestions/pointers would be greatly appreciated.

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• Validation firing in ASP.NET MVC

  - by rkrauter

  I am lost on this MVC project I am working on. I also read Brad Wilsons article. http://bradwilson.typepad.com/blog/2010/01/input-validation-vs-model-validation-in-aspnet-mvc.html I have this: public class Employee { [Required] public int ID { get; set; } [Required] public string FirstName { get; set; } [Required] public string LastName { get; set; } } and these in a controller: public ActionResult Edit(int id) { var emp = GetEmployee(); return View(emp); } [HttpPost] public ActionResult Edit(int id, Employee empBack) { var emp = GetEmployee(); if (TryUpdateModel(emp,new string[] { "LastName"})) { Response.Write("success"); } return View(emp); } public Employee GetEmployee() { return new Employee { FirstName = "Tom", LastName = "Jim", ID = 3 }; } and my view has the following: <% using (Html.BeginForm()) {%> <%= Html.ValidationSummary() %> <fieldset> <legend>Fields</legend> <div class="editor-label"> <%= Html.LabelFor(model => model.FirstName) %> </div> <div class="editor-field"> <%= Html.DisplayFor(model => model.FirstName) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.LastName) %> </div> <div class="editor-field"> <%= Html.TextBoxOrLabelFor(model => model.LastName, true)%> <%= Html.ValidationMessageFor(model => model.LastName) %> </div> <p> <input type="submit" value="Save" /> </p> </fieldset> <% } %> Note that the only field editable is the LastName. When I postback, I get back the original employee and try to update it with only the LastName property. But but I see on the page is the following error: •The FirstName field is required. This from what I understand, is because the TryUpdateModel failed. But why? I told it to update only the LastName property. I am using MVC2 RTM Thanks in advance.

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• Ajax comments form in ASP.NET MVC2, howto?

  - by Artiom Chilaru

  I've been playing around with different aspects of MVC for some time now, and I've reached a situation where I'm not sure what would be the best way to solve a problem. I'm hoping that the SO community will help me out here :P I've seen a number of examples of Ajax.BeginForm on the internet, and it seems like a very nifty idea. E.g. you have a dropdown where you select a customer - and on selecting one it will load this client's details in some placeholder on the page. This works perfectly fine. But what to do if you want to tie in some validation in the box? Just hypothetically, imagine an article page, and user comments in the bottom. Below the comments area there's an ajax-y "Add comment" box. When a user adds a comment, it will appear in the comments area, below the last comment there. If I set the Ajax.BeginForm to Append the result of the call to the Comments area, it will work fine. But what if the data posted is not valid? Instead of appending a "successful" comment to the comments area I have to show the user validation errors. At this point I decided that the area INSIDE the Ajax.BeginForm will be inside a partial, and the form's submits will return this partial. Validation works fine. On each submit we reload the contents inside the form element. But how to add the successful comment to the top? Other things to consider: The comment form also has a "Preview" button. When the user clicks on Preview, I should load the rendered comment into a preview box. This will probably be inside the form area as well. I was thinking of using Json results instead. When the user submits the form, the server code will generate a Json object with a Success value, and html rendered partials as some properties. Something like { "success": true, "form": "<html form data>", "comment": "successful comment html to inject into the page" } This would be a perfect solution, except there's no way in MVC to render a partial into a string, inside the controller (separation of context, remember?). So.. what should I do then? Any "correct" way to implement this? Anyone???

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• ASP.NET MVC: Html.Actionlink() generates empty link.

  - by wh0emPah

  Okay i'm experiencing some problems with the actionlink htmlhelper. I have some complicated routing as follows: routes.MapRoute("Groep_Dashboard_Route", // Route name "{EventName}/{GroupID}/Dashboard", // url with Paramters new {controller = "Group", action="Dashboard"}); routes.MapRoute("Event_Groep_Route", // Route name "{EventName}/{GroupID}/{controller}/{action}/{id}", new {controller = "Home", action = "Index"}); My problem is generating action links that match these patterns. The eventname parameter is really just for having a user friendly link. it doesn't do anything. Now when i'm trying for example to generate a link. that shows the dashboard of a certain groep. Like: mysite.com/testevent/20/Dashboard I'll use the following actionlink: <%: Html.ActionLink("Show dashboard", "Group", "Dashboard", new { EventName_Url = "test", GroepID = item.groepID}, null)%> What my actual result in html gives is: <a href="">Show Dashboard</a> Please bear with me i'm still new at ASP MVC. Could someone tell me what i'm doing wrong? Help would be appreciated!

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• Export the datagrid data to text in asp.net

  - by SRIRAM

  Problem:It will asks there is no assembly reference/namespace for Database Database db = DatabaseFactory.CreateDatabase(); DBCommandWrapper selectCommandWrapper = db.GetStoredProcCommandWrapper("sp_GetLatestArticles"); DataSet ds = db.ExecuteDataSet(selectCommandWrapper); StringBuilder str = new StringBuilder(); for(int i=0;i<=ds.Tables[0].Rows.Count - 1; i++) { for(int j=0;j<=ds.Tables[0].Columns.Count - 1; j++) { str.Append(ds.Tables[0].Rows[i][j].ToString()); } str.Append("<BR>"); } Response.Clear(); Response.AddHeader("content-disposition", "attachment;filename=FileName.txt"); Response.Charset = ""; Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.ContentType = "application/vnd.text"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite); Response.Write(str.ToString()); Response.End();

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• Validate a single property with the Fluent Validation Library for .Net

  - by Blegger

  Can you validate just a single property with the Fluent Validation Library, and if so how? I thought this discussion thread from January of 2009 showed me how to do it via the following syntax: validator.Validate(new Person(), x => x.Surname); Unfortunately it doesn't appear this works in the current version of the library. One other thing that led me to believe that validating a single property might be possible is the following quote from Jeremy Skinners' blog post: "Finally, I added the ability to be able to execute some of FluentValidation’s Property Validators without needing to validate the entire object. This means it is now possible to stop the default “A value was required” message from being added to ModelState. " However I do not know if that necessarily means it supports just validating a single property or the fact that you can tell the validation library to stop validating after the first validation error.

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• Entity Framework Vote of No Confidence - relevant in .NET 4?

  - by Asaf R

  Hi, I'm deciding on an ORM for a big project and was determined to go for ADO.NET Entity Framework, specifically its new version that ships with .NET 4. During my search for information on EF I stumbled upon ADO .NET Entity Framework Vote of No Confidence which I'm not sure how to take. The Vote of No Confidence was written sometime in 2008 to convince Microsoft to listen to specific criticism for EF v1. It's not clear whether the claims made in the Vote of No Confidence are still valid (in .NET 4) and if they're serious enough to use other solutions. NHibernate is a mature alternative, but I don't know what problems it brings. I'm generally more inclined towards a Ms solution, mainly because I can count on integration with VS and on their developer support. I would appreciate examples of how the problems mentioned in the Vote of No Confidence affect in real world projects. More importantly, are the claims made there still relevant in EF for .NET 4? Thanks, Asaf

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• Convert String to Datetime Format VB.NET

  - by Codex73

  Need to convert a string to normal datetime format so it can be correctly inserted onto a datetime type field. String Format: 4/21/2010 4:43:03 PM Example: 2010-04-21 16:43:03.000

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• Why did the aspnet_client folder come back in ASP.NET 4?

  - by rbeier

  I recently upgraded my MVC 1 project (ASP.NET 3.5) to MVC 2 (ASP.NET 4). I noticed there is now a folder "aspnet_client\system_web\4_0_30319" under the site root. This folder is empty... I'm just wondering if anyone knows why it was created. I remember the aspnet_client folder from the days of .NET 1.1, but I thought it was obsoleted when .NET 2.0 came out. For example, see the answers in these two stackoverflow posts: What is the aspnet_client folder in my ASP.NET website? What is the aspnet_client folder for under the IIS structure? So I'm just curious why it's back. Thanks, Richard

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