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  • ASP.NET MVC 2.0 Client-Side Validation HOWTO

    - by AlexWalker
    Where can I find some good information on the new client-side validation functionality included in ASP.NET MVC v2? I'd like to find information about using the client-side validation JavaScript without using DataAnnotations, and I'd like to find out how custom validations are handled. For example, if I want to validate two fields together, how would I utilize the provided JavaScript? Or if I wanted to write validation code on the server-side that queried a database, how could I use the provided JavaScript to implement a similar validation? I don't see any books on MVC2 yet, and the blog entries I've found are not detailed enough.

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  • Creating a subscription based website in ASP.NET

    - by DotnetDude
    I'd like to update my website to make it subscription based. It's a ASP.NET Web forms project. I am looking for the following functionality: Ability to have users sign up for different plans (Gold, Premium etc) Ability to have users upgrade / downgrade to and from plans Ability to hook this up to a Payment processor Ability to have a credit based system (User buys x credits for $y) as an alternative to plans in (1) Most of this functionality (if not all) is supported by a large number of websites which makes me think I can leverage on an existing framework instead of re-inventing the wheel. Any thoughts?

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  • .NET remoting manual configuration

    - by Quandary
    Question: In .NET remoting, I configure the client like this from a config file RemotingConfiguration.Configure("AsyncRemoteAPIclient.exe.config", False) Dim obj As New RemoteAPI.ServiceClass() (with this AsyncRemoteAPIclient.exe.config) <system.runtime.remoting> <application> <client> <wellknown type="RemoteAPI.ServiceClass, ServiceClass" url="http://localhost:8080/ServiceClass.rem" /> </client> <channels> <channel ref="http" port="0" /> </channels> </application> But when I replace the config file with manual configuration with the below code, it stops working, and starts complaining "ServiceClass or dependency not found". Dim chan As New System.Runtime.Remoting.Channels.Http.HttpChannel(0) System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(chan, False) ' Create an instance of the remote object Dim obj As RemoteAPI.ServiceClass obj = CType(Activator.GetObject(GetType(RemoteAPI.ServiceClass), "http://localhost:8080/ServiceClass.rem"), RemoteAPI.ServiceClass) What's wrong ?

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  • OT: Thank You, Microsoft

    - by andyleonard
    cross-posted from AndyLeonard.me … Each April 1st for the past five years, I have been honored to receive an email from Microsoft informing me I have been recognized as a SQL Server MVP. Tomorrow will be different. Back in January – when I wrote this – I requested Microsoft not consider me for renewal. I have enjoyed serving as a Microsoft MVP. I only got to see what it is like to be a SQL Server MVP, and I think we are part of a special community that makes being an MVP even more special. I have...(read more)

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  • .NET framework: new features

    - by Budda
    Few weaks ago I've changed target .NET framework for my application to the 4th version. Recently my resharper told me that my variable "MetaDescription" hides property 'string System.Web.UI.Page.MetaDescription' After small investigation the peace of code that worked earlier: HtmlMeta MetaDescription = new HtmlMeta(); MetaDescription.Attributes.Add("name", "description"); MetaDescription.Attributes.Add("content", ((IFriendlySEO)Page).DescriptionString); Header.Controls.Add(MetaDescription); was replaced with much more readable: MetaDescription = ((IFriendlySEO)Page).DescriptionString; (same for MetaKeywords). Question: is there any useful source that can give a list of such new features? Thanks.

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  • Configuring Multiple ASP.NET MVC Sites To Use a Single Database For Authentication/Membership

    - by Maxim Z.
    Is it possible for two or more ASP.NET MVC sites to use a single SQL Server database for authentication and other things? Here's how I'm thinking of setting it up: I will combine the current database of each site into one single database, prefixing the tables with the name of the site they belong to. I currently have authentication tables generated by the asp.net_regsql.exe utility. How should I combine those tables? I'm guessing that the way to do it is to somehow set the "application_id" column in those tables... Thanks in advance.

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  • Implementing a Suspension or Penalty System for Users in ASP.NET MVC

    - by Maxim Z.
    I'm writing a site in ASP.NET MVC that will have user accounts. As the site will be oriented towards discussion, I think I need a system for admins to be able to moderate users, just like we have here, on Stack Overflow. I'd like to be able to put a user into a "suspension", so that they are able to log in to the site (at which point they are greeted with a message, such as, "Your account has been suspended until [DATE]"), but are unable to do the functions that users they would normally be able to do. What's the best way of implementing this? I was thinking of creating a "Suspended" role, but the thing is, I have a few different roles for normal users themselves, with different privileges. Have you ever designed a feature like this before? How should I do it? Thanks in advance.

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  • Issues with RegularExpressionValidator in VB .NET 2005 using ASP File Uploader

    - by JFV
    I'm looking to validate a single word: detail (upper/lower/mix-case) prior to submitting my VB .NET 2005 page. I used Regex Builder and the below code validates, but it's not working in my web page... Does anyone have any ideas? Input file location: <input id="btnBrowseForFile" runat="server" enableviewstate="true" name="btnBrowseForFile" style="width: 500px" type="file" /> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="btnBrowseForFile" ErrorMessage="*Please select an input file." Display="Dynamic"></asp:RequiredFieldValidator> <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="btnBrowseForFile" Display="Dynamic" ErrorMessage='*Please select a file that contains the word "detail"' ValidationExpression="(\b|\s|\w)(d|D)(e|E)(t|T)(a|A)(i|I)(l|L)(\s|\b|\w)"></asp:RegularExpressionValidator>&nbsp; Thanks!!! JFV

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  • Ado.net ExecuteReader giving duplication while binding with datagrid

    - by Irvin Dua
    I am using below mentioned Ado.net function and resultset bind with grid view, however I am getting the duplicate rows in the resultset. Please help me out. Thanks Private _products As New List(Of Product) Public Property Products As List(Of BusinessObjects.Product) Get Return _products End Get Set(ByVal value As List(Of BusinessObjects.Product)) _products = value End Set End Property Public Function GetProductDetails() As List(Of Product) Dim product As New BusinessObjects.Product Using connection As New SqlConnection connection.ConnectionString = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString connection.Open() Using Command As New SqlCommand("select * from T_product", connection) Dim rdr As SqlDataReader rdr = Command.ExecuteReader While rdr.Read() product.ProductID = rdr("ProductID") product.ProductName = rdr("ProductName") Products.Add(product) End While GridView1.DataSource = Products GridView1.DataBind() End Using End Using Return Products End Function

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  • Microsoft Access 2010: How to Use the Report Wizard

    If you have used Microsoft products other selections of easy to use software in the past, you have probably come across a wizard. A wizard helps you complete tasks with ease, acting as a guide along the way. This particular tutorial will concentrate on Microsoft Access 2010's Report Wizard, which is a useful tool that makes dealing with reports as easy as can be. To showcase what the Report Wizard in Microsoft Access 2010 can do for you, we are going to create a report that is characterized by multiple tables. The overall process is easy, and we will detail the necessary steps to complete i...

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  • Implementing a normal website inside ASP.NET MVC 2

    - by cc0
    I have a website consisting of an index.html, a number of style sheet files as well as some javascript files. Then I needed a way for this site to communicate efficiently with a Microsoft SQL Server, so I was recommended to use the MVC framework to facilitate that kind of communication. I created the C#.net controller code needed to output the necessary information from the database using URL parameters, so now I am trying to put the whole web-site together inside the MVC framework. I started an empty project-template in MVC 2 framework. I'm sure there must be a good way to implement the current code into this framework, but I am very uncertain as to what the best approach to this would be. Could anyone point me in the right direction here? I'm not sure whether I need to change any of the current HTML, or exactly what to add to it. I'd love to see some kind of guide or tutorial, or just any advice I can get as I try to learn this. Any help is very much appreciated!

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  • Mscorcfg.msc .net Configuration Tools problem

    - by vijay shiyani
    I'm trying to run Microsoft's .NET Framework Configuration Tool (Mscorcfg.msc). I have Visual Studio 2008 installed. I also have the following installed on my PC: Microsoft .Net Framework v1.0.3705 Microsoft .Net Framework 2.0 Service Pack 2 Microsoft .Net Framework 3.0 Service Pack 2 Microsoft .Net Framework 3.5 SP1 Microsoft .Net Framework v4.0.30319 I'm not sure why, but I can't start "Mscorcfg.msc" the usual way (as suggested in the http://msdn.microsoft.com/en-us/library/2bc0cxhc(VS.80).aspx and http://msdn.microsoft.com/en-us/library/2bc0cxhc.aspx URL). I looked for "Mscorcfg.msc" on my PC and found only 1 occurence (in the C:\WINDOWS\ServicePackFiles\i386 folder). When I double-click on the .msc file in Windows Explorer, I get the "MMC could not create the snap-in." message. What should I do ? Thanks

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  • ASP.NET WebForms vs MVC [after VS2010/.NET 4.0 announcement]

    - by fjxx
    Two of the biggest advantages of MVC over webforms were non-existent viewstate and URL routing. VS2010 and .NET 4.0 incorporates built-in URL routing for Webforms as well as better control for viewstate. I advocate use of MVC for extranet sites due to the MVC design pattern and its general lightweight nature but in light of this new announcement has Webforms closed the gap? Why would you still pick MVC over Webforms? Thanks

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  • tigra calendar and asp.net help, or using javascript in asp.net

    - by MyHeadHurts
    <input type="text" name="testinput" /> <script language="JavaScript"> new tcal ({ // form name 'formname': 'testform', // input name 'controlname': 'testinput' }); </script> <form id="form2" runat="server"> <div style="height: 897px"> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <br /> <asp:Button ID="Button1" runat="server" Text="Update" Width="122px" /> <br /> <br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> aaaaaaaaaaaaaaaaaaaaaaaa<br /> <br /> <br /> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:GridView ID="GridView2" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" Height="147px" Width="694px"> <RowStyle BackColor="#E3EAEB" /> <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" /> <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#7C6F57" /> <AlternatingRowStyle BackColor="White" /> </asp:GridView> <br /> <br /> <asp:TextBox ID="TextBox1" runat="server" Height="33px" Width="179px">fsafasfa</asp:TextBox> </ContentTemplate> </asp:UpdatePanel> </div> </form> I am using tigra calender in an asp.net page, but the datepicker will not show up. The img folder path is the same and i even placed it in my apdata. I took the code straight from the sample page, and I have even used tigra calender before, but not with asp.net any ideas. Is there another calender tool i should be using?

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  • Returning date from Stored procedure in ASP.Net/VB.Net

    - by Mo
    Hi, I want to execute a method on VB.Net to return a date which is in the stored procedure. I tried using ExecuteScalar but it doesnt work it retruns error 'Implicit conversion from data type datetime to int is not allowed. Use the CONVERT function to run this query' Any help would be much appreciated please? thank you below is the code Public Function GetHolidaydate(ByVal struserID as String) As DateTime Dim objArgs1 As New clsSQLStoredProcedureParams objArgs1.Add("@userID", Me.Tag) objArgs1.Add("@Date", 0, 0, ParameterDirection.Output) Return (CDate(ExecuteScalar(clsLibrary.MyStoredProcedure.GetHolidayDate, objArgs1))) End Function

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  • Looking for RESTful Suggestions In Porting ASP.NET to MVC.NET

    - by DaveDev
    I've been tasked with porting/refactoring a Web Application Platform that we have from ASP.NET to MVC.NET. Ideally I could use all the existing platform's configurations to determine the properties of the site that is presented. Is it RESTful to keep a SiteConfiguration object which contains all of our various page configuration data in the System.Web.Caching.Cache? There are a lot of settings that need to be loaded when the user acceses our site so it's inefficient for each user to have to load the same settings every time they access. Some data the SiteConfiguration object contains is as follows and it determines what Master Page / site configuration / style / UserControls are available to the client, public string SiteTheme { get; set; } public string Region { private get; set; } public string DateFormat { get; set; } public string NumberFormat { get; set; } public int WrapperType { private get; set; } public string LabelFileName { get; set; } public LabelFile LabelFile { get; set; } // the following two are the heavy ones // PageConfiguration contains lots of configuration data for each panel on the page public IList<PageConfiguration> Pages { get; set; } // This contains all the configurations for the factsheets we produce public List<ConfiguredFactsheet> ConfiguredFactsheets { get; set; } I was thinking of having a URL structure like this: www.MySite1.com/PageTemplate/UserControl/ the domain determines the SiteConfiguration object that is created, where MySite1.com is SiteId = 1, MySite2.com is SiteId = 2. (and in turn, style, configurations for various pages, etc.) PageTemplate is the View that will be rendered and simply defines a layout for where I'm going to inject the UserControls Can somebody please tell me if I'm completely missing the RESTful point here? I'd like to refactor the platform into MVC because it's better to work in but I want to do it right but with a minimum of reinventing-the-wheel because otherwise it won't get approval. Any suggestions otherwise? Thanks

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  • Html.DropDownListFor<> and complex object in ASP.NET MVC2

    - by dagda1
    Hi, I am looking at ASP.NET MVC2 and trying to post a complex object using the new EditorFor syntax. I have a FraudDto object that has a FraudCategory child object and I want to set this object from the values that are posted from the form. Posting a simple object is not a problem but I am struggling with how to handle complex objects with child objects. I have the following parent FraudDto object whcih I am binding to on the form: public class FraudDto { public FraudCategoryDto FraudCategory { get; set; } public List<FraudCategoryDto> FraudCategories { get; private set; } public IEnumerable<SelectListItem> FraudCategoryList { get { return FraudCategories.Select(t => new SelectListItem { Text = t.Name, Value = t.Id.ToString() }); } The child FraudCategoryDto object looks like this: public class FraudCategoryDto { public int Id { get; set; } public string Name { get; set; } } On the form, I have the following code where I want to bind the FraudCategoryDto to the dropdown. The view is of type ViewPage: <td class="tac"> <strong>Category:</strong> </td> <td> <%= Html.DropDownListFor(x => x.FraudCategory, Model.FraudTypeList)%> </td> I then have the following controller code: [HttpPost] public virtual ViewResult SaveOrUpdate(FraudDto fraudDto) { return View(fraudDto); } When the form is posted to the server, the FraudCategory property of the Fraud object is null. Are there any additional steps I need to hook up this complex object? Cheers Paul

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  • Serializing Complex ViewModel with Json.Net Destabilization Error on Latest Version

    - by dreadlocks1221
    I just added the latest Version of JSON.Net and I get the System.Security.VerificationException: Operation could destabilize the runtime error when trying to use a controller (while running the application). I read in other posts that this issue should have been fixed in release 6 but I still have the problem. I even added *Newtonsoft.* to the ignore modules in the intellitrace options, which seems to have suppressed the error, but the post will just run forever and not return anything. Any help I can get would be greatly appreciated. [HttpPost] public string GetComments(int ShowID, int Page) { int PageSize = 10; UserRepository UserRepo = new UserRepository(); ShowCommentViewModel viewModel = new ShowCommentViewModel(); IQueryable<Comment> CommentQuery = showRepository.GetShowComments(ShowID); var paginatedComments = new PaginatedList<Comment>(CommentQuery, Page, PageSize); viewModel.Comments = new List<CommentViewModel>(); foreach (Comment comment in CommentQuery.Take(10).ToList()) { CommentViewModel CommentModel = new CommentViewModel { Comment = comment, PostedBy = UserRepo.GetUserProfile(comment.UserID) }; IQueryable<Comment> ReplyQuery = showRepository.GetShowCommentReplies(comment.CommentID); int ReplyPage = 0; var paginatedReplies = new PaginatedList<Comment>(ReplyQuery, ReplyPage, 3); CommentModel.Replies = new List<ReplyModel>(); foreach (Comment reply in ReplyQuery.Take(3).ToList()) { ReplyModel rModel = new ReplyModel { Reply = reply, PostedBy = UserRepo.GetUserProfile(reply.UserID) }; CommentModel.Replies.Add(rModel); } CommentModel.RepliesNextPage = paginatedReplies.HasNextPage; CommentModel.RepliesPeviousPage = paginatedReplies.HasPreviousPage; CommentModel.RepliesTotalPages = paginatedReplies.TotalPages; CommentModel.RepliesPageIndex = paginatedReplies.PageIndex; CommentModel.RepliesTotalCount = paginatedReplies.TotalCount; viewModel.Comments.Add(CommentModel); } viewModel.CommentsNextPage = paginatedComments.HasNextPage; viewModel.CommentsPeviousPage = paginatedComments.HasPreviousPage; viewModel.CommentsTotalPages = paginatedComments.TotalPages; viewModel.CommentsPageIndex = paginatedComments.PageIndex; viewModel.CommentsTotalCount = paginatedComments.TotalCount; return JsonConvert.SerializeObject(viewModel, Formatting.Indented); }

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  • [Asp.Net MVC] Encoding a character

    - by Trimack
    Hi, I am experiencing some weird encoding behaviour in my ASP.NET MVC project. In my Site.Master there is <div class="logo"> <a href="<%=Url.Action("Index", "Win7")%>"><%= Html.Encode("Windows 7 Tutoriál") %></a></div> which translates to the resulting page as <div class="logo"> <a href="/">Windows 7 TutoriA?l</a></div> However, in the Index.aspx there is <h1> Windows 7 Tutoriál</h1> which translates correctly on the same resulting page. I do have <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> as my first line in <head>. Locally, both files are saved in UTF-8 encoding. Any ideas why is this happening and how to fix it? Thanks in advance.

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  • asp.net mvc outputting json with backslashes ( escape) despite many attemps to filter

    - by minus4
    i have an asp.net controller that output Json as the results a section of it is here returnString += string.Format(@"{{""filename"":""{0}"",""line"":[", file.Filename); what i get returned is this: "{\"DPI\":\"66.8213457076566\",\"width\":\"563.341067\",\"editable\":\"True\",\"pricecat\":\"6\",\"numpages\":\"2\",\"height\":\"400\",\"page\":[{\"filename\":\"999_9_1.jpg\",\"line\":[]},{\"filename\":\"999_9_2.jpg\",\"line\":[]}]]" i have tried to return with the following methods: return Json(returnString); return Json(returnString.Replace("\\",""); return Json will serialize my string to a jSon string, this i know but it likes to escape for some reason, how can i get rid of it ???? for info this is how i call it with jQuery: $.ajax({ url:"/Products/LoadArtworkToJSon", type:"POST", dataType: "json", async: false, data:{prodid: prodid }, success: function(data){ sessvars.myData = data; measurements = sessvars.myData; $("#loading").remove(); //empty the canvas and create a new one with correct data, always start on page 0; $("#movements").remove(); $("#canvas").append("<div id=\"movements\" style=\"width:" + measurements.width + "px; height:" + Math.round(measurements.height) + "px; display:block; border:1px solid black; background:url(/Content/products/" + measurements.page[0].filename + ") no-repeat;\"></div>"); your help is much appreciated thanks

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  • VB.NET - ASP.NET - MS-Access - SQL Statement

    - by Brian
    I have a button which when pressed, sets the user's rights in the db. (If Administrator UserTypeID is set to '2' and if Customer it is set to '1'). However when I run the below code, everything remains the same. I think it's from the SQL statement but I;m not sure. Can anyone help please? Protected Sub btnSetUser_Click(sender As Object, e As System.EventArgs) Handles btnSetUser.Click Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Brian\Documents\Visual Studio 2010\WebSites\WebSite3\db.mdb;") Dim cmd As OleDbCommand = New OleDbCommand("UPDATE [User] SET [UserTypeID] WHERE Username=?", conn) conn.Open() cmd.Parameters.AddWithValue("@Username", txtUser.Text) If ddUserType.SelectedItem.Text = "Administrator" Then cmd.Parameters.AddWithValue("@UserTypeID", "2") cmd.ExecuteNonQuery() lblSetUser.Text = txtUser.Text + "was set to Administrator." ElseIf ddUserType.SelectedItem.Text = "Customer" Then cmd.Parameters.AddWithValue("@UserTypeID", "1") cmd.ExecuteNonQuery() lblSetUser.Text = txtUser.Text + "was set to Customer." End If conn.Close() End Sub End Class

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  • ASP.NET MVC, Url Routing: Maximum Path (URL) Length

    - by Martin Aatmaa
    The Scenario I have an application where we took the good old query string URL structure: ?x=1&y=2&z=3&a=4&b=5&c=6 and changed it into a path structure: /x/1/y/2/z/3/a/4/b/5/c/6 We're using ASP.NET MVC and (naturally) ASP.NET routing. The Problem The problem is that our parameters are dynamic, and there is (theoretically) no limit to the amount of parameters that we need to accommodate for. This is all fine until we got hit by the following train: HTTP Error 400.0 - Bad Request ASP.NET detected invalid characters in the URL. IIS would throw this error when our URL got past a certain length. The Nitty Gritty Here's what we found out: This is not an IIS problem IIS does have a max path length limit, but the above error is not this. Learn dot iis dot net How to Use Request Filtering Section "Filter Based on Request Limits" If the path was too long for IIS, it would throw a 404.14, not a 400.0. Besides, the IIS max path (and query) length are configurable: <requestLimits maxAllowedContentLength="30000000" maxUrl="260" maxQueryString="25" /> This is an ASP.NET Problem After some poking around: IIS Forums Thread: ASP.NET 2.0 maximum URL length? http://forums.iis.net/t/1105360.aspx it turns out that this is an ASP.NET (well, .NET really) problem. The shit of the matter is that, as far as I can tell, ASP.NET cannot handle paths longer than 260 characters. The nail in the coffin in that this is confirmed by Phil the Haack himself: Stack Overflow ASP.NET url MAX_PATH limit Question ID 265251 The Question So what's the question? The question is, how big of a limitation is this? For my app, it's a deal killer. For most apps, it's probably a non-issue. What about disclosure? No where where ASP.NET Routing is mentioned have I ever heard a peep about this limitation. The fact that ASP.NET MVC uses ASP.NET routing makes the impact of this even bigger. What do you think?

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  • C# 4.0: Dynamic Programming

    - by Paulo Morgado
    The major feature of C# 4.0 is dynamic programming. Not just dynamic typing, but dynamic in broader sense, which means talking to anything that is not statically typed to be a .NET object. Dynamic Language Runtime The Dynamic Language Runtime (DLR) is piece of technology that unifies dynamic programming on the .NET platform, the same way the Common Language Runtime (CLR) has been a common platform for statically typed languages. The CLR always had dynamic capabilities. You could always use reflection, but its main goal was never to be a dynamic programming environment and there were some features missing. The DLR is built on top of the CLR and adds those missing features to the .NET platform. The Dynamic Language Runtime is the core infrastructure that consists of: Expression Trees The same expression trees used in LINQ, now improved to support statements. Dynamic Dispatch Dispatches invocations to the appropriate binder. Call Site Caching For improved efficiency. Dynamic languages and languages with dynamic capabilities are built on top of the DLR. IronPython and IronRuby were already built on top of the DLR, and now, the support for using the DLR is being added to C# and Visual Basic. Other languages built on top of the CLR are expected to also use the DLR in the future. Underneath the DLR there are binders that talk to a variety of different technologies: .NET Binder Allows to talk to .NET objects. JavaScript Binder Allows to talk to JavaScript in SilverLight. IronPython Binder Allows to talk to IronPython. IronRuby Binder Allows to talk to IronRuby. COM Binder Allows to talk to COM. Whit all these binders it is possible to have a single programming experience to talk to all these environments that are not statically typed .NET objects. The dynamic Static Type Let’s take this traditional statically typed code: Calculator calculator = GetCalculator(); int sum = calculator.Sum(10, 20); Because the variable that receives the return value of the GetCalulator method is statically typed to be of type Calculator and, because the Calculator type has an Add method that receives two integers and returns an integer, it is possible to call that Sum method and assign its return value to a variable statically typed as integer. Now lets suppose the calculator was not a statically typed .NET class, but, instead, a COM object or some .NET code we don’t know he type of. All of the sudden it gets very painful to call the Add method: object calculator = GetCalculator(); Type calculatorType = calculator.GetType(); object res = calculatorType.InvokeMember("Add", BindingFlags.InvokeMethod, null, calculator, new object[] { 10, 20 }); int sum = Convert.ToInt32(res); And what if the calculator was a JavaScript object? ScriptObject calculator = GetCalculator(); object res = calculator.Invoke("Add", 10, 20); int sum = Convert.ToInt32(res); For each dynamic domain we have a different programming experience and that makes it very hard to unify the code. With C# 4.0 it becomes possible to write code this way: dynamic calculator = GetCalculator(); int sum = calculator.Add(10, 20); You simply declare a variable who’s static type is dynamic. dynamic is a pseudo-keyword (like var) that indicates to the compiler that operations on the calculator object will be done dynamically. The way you should look at dynamic is that it’s just like object (System.Object) with dynamic semantics associated. Anything can be assigned to a dynamic. dynamic x = 1; dynamic y = "Hello"; dynamic z = new List<int> { 1, 2, 3 }; At run-time, all object will have a type. In the above example x is of type System.Int32. When one or more operands in an operation are typed dynamic, member selection is deferred to run-time instead of compile-time. Then the run-time type is substituted in all variables and normal overload resolution is done, just like it would happen at compile-time. The result of any dynamic operation is always dynamic and, when a dynamic object is assigned to something else, a dynamic conversion will occur. Code Resolution Method double x = 1.75; double y = Math.Abs(x); compile-time double Abs(double x) dynamic x = 1.75; dynamic y = Math.Abs(x); run-time double Abs(double x) dynamic x = 2; dynamic y = Math.Abs(x); run-time int Abs(int x) The above code will always be strongly typed. The difference is that, in the first case the method resolution is done at compile-time, and the others it’s done ate run-time. IDynamicMetaObjectObject The DLR is pre-wired to know .NET objects, COM objects and so forth but any dynamic language can implement their own objects or you can implement your own objects in C# through the implementation of the IDynamicMetaObjectProvider interface. When an object implements IDynamicMetaObjectProvider, it can participate in the resolution of how method calls and property access is done. The .NET Framework already provides two implementations of IDynamicMetaObjectProvider: DynamicObject : IDynamicMetaObjectProvider The DynamicObject class enables you to define which operations can be performed on dynamic objects and how to perform those operations. For example, you can define what happens when you try to get or set an object property, call a method, or perform standard mathematical operations such as addition and multiplication. ExpandoObject : IDynamicMetaObjectProvider The ExpandoObject class enables you to add and delete members of its instances at run time and also to set and get values of these members. This class supports dynamic binding, which enables you to use standard syntax like sampleObject.sampleMember, instead of more complex syntax like sampleObject.GetAttribute("sampleMember").

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  • Office Live add-in 1.5 cannot be installed

    - by wisecarver
    Having trouble with a recent Windows Update that failed to install the Office Live add-in 1.5? This has been driving me nuts on a Windows 7 Ultimate 64-bit system for three days. Windows Update would fail, click the “Try again” button and…fail So like I good boy I used http://www.bing.com and have been searching for resolutions. Success! The Microsoft Social forums. http://social.answers.microsoft.com/Forums/en-US/officeinstall/thread/4c62e615-a3e5-4cf9-ae6a-5fd870dfb0bc http://support.microsoft...(read more)

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