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  • IoC Dependancy injection into Custom HTTP Module - how? (ASP.NET)

    - by Sosh
    Hi, I have a custom HTTP Module. I would like to inject the logger using my IoC framework, so I can log errors in the module. However, of course I don't get a constructor, so can't inject it into that. What's the best way to go about this? If you need the specific IoC container - I'm currently using Windsor, but may soon move to AutoFac. Thanks

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  • Is it a good practice to perform direct database access in the code-behind of an ASP.NET page?

    - by patricks418
    Hi, I am an experienced developer but I am new to web application development. Now I am in charge of developing a new web application and I could really use some input from experienced web developers out there. I'd like to understand exactly what experienced web developers do in the code-behind pages. At first I thought it was best to have a rule that all the database access and business logic should be performed in classes external to the code-behind pages. My thought was that only logic necessary for the web form would be performed in the code-behind. I still think that all the business logic should be performed in other classes but I'm beginning to think it would be alright if the code-behind had access to the database to query it directly rather than having to call other classes to receive a dataset or collection back. Any input would be appreciated.

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  • How do I run asynchronous code in asp.net mvc 2?

    - by SLC
    I tried this: BackgroundWorker bw = new BackgroundWorker(); bw.DoWork += (o, e) => { SendConfEmail(); }; bw.RunWorkerAsync(); but it didn't work. SendConfEmail takes a while to run. I guess it's because BackgroundWorker is designed for winforms not webforms. Any ideas how I can solve the problem?

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  • What rules govern cross-version compatibility for .NET applications and the C# language?

    - by John Feminella
    For some reason I've always had trouble remembering the backwards/forwards compatibility guarantees made by the framework, so I'd like to put that to bed forever. Suppose I have two assemblies, A and B. A is older and references .NET 2.0 assemblies; B references .NET 3.5 assemblies. I have the source for A and B, Ax and Bx, respectively; they are written in C# at the 2.0 and 3.0 language levels. (That is, Ax uses no features that were introduced later than C# 2.0; likewise Bx uses no features that were introduced later than 3.0.) I have two environments, C and D. C has the .NET 2.0 framework installed; D has the .NET 3.5 framework installed. Now, which of the following can/can't I do? Running: run A on C? run A on D? run B on C? run C on D? Compiling: compile Ax on C? compile Ax on D? compile Bx on C? compile Bx on D? Rewriting: rewrite Ax to use features from the C# 3 language level, and compile it on D, while having it still work on C? rewrite Bx to use features from the C# 4 language level on another environment E that has .NET 4, while having it still work on D?' Referencing from another assembly: reference B from A and have a client app on C use it? reference B from A and have a client app on D use it? reference A from B and have a client app on C use it? reference A from B and have a client app on D use it? More importantly, what rules govern the truth or falsity of these hypothetical scenarios?

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  • ASP.NET or PHP: Is Memcached useful for storing user-state information?

    - by hamlin11
    This question may expose my ignorance as a web developer, but that wouldn't exactly be a bad thing for me now would it? I have the need to store user-state information. Examples of information that I need to store per user. (define user: unauthenticated visitor) User arrived to the site from google/bing/yahoo User utilized the search feature (true/false) List of previous visited product pages on current visit It is my understanding that I could store this in the view state, but that causes a problem with page load from the end-users' perspective because a significant amount of non-viewable information is being transferred to and from the end-users even though the server is the only side that needs the info. On a similar note, it is my understanding that the session state can be used to store such information, but does not this also result in the same information being transferred to the user and stored in their cookie? (Not quite as bad as viewstate, but it does not feel ideal). This leaves me with either a server-only-session storage system or a mem-caching solution. Is memcached the only good option here?

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  • I cannot seem to load an XML document using ASP (Classic), IIS6. Details inside.

    - by carny666
    So I am writing a web application for use within my organization. The application requires that it know who the current user is. This is done by calling the Request.ServerVariables("AUTH_USER") function, which works great as long as 'Anonymous Access' is disabled (unchecked) and 'Integrated Windows Authentication' is enabled (checked) within IIS for this subweb. Unfortunately by doing this I get an 'Access Denied' error when I hit the load method of the XML DOM. Example code: dim urlToXmlFile urlToXmlFile = "http://currentwebserver/currentsubweb/nameofxml.xml" dim xmlDom set xmlDom = Server.CreateObject("MSXML2.DOMDocument") xmlDom.async = false xmlDom.load( urlToXmlFile ) ' <-- this is where I get the error! I've looked everywhere and cannot find a solution. I should be able to load an XML file into the DOM regardless of the authentication method. Any help would be appreciated. So far the only two solutions I can come up with are: a) create a new subweb that JUST gets the current user name and somehow passes it back to my XML reading subweb. b) open up security on the entire system to 'Everyone', which works but our IS department wouldn't care for that.

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  • How to provide warnings during validation in ASP.NET MVC?

    - by Alex
    Sometimes user input is not strictly invalid but can be considered problematic. For example: A user enters a long sentence in a single-line Name field. He probably should have used the Description field instead. A user enters a Name that is very similar to that of an existing entity. Perhaps he's inputting the same entity but didn't realize it already exists, or some concurrent user has just entered it. Some of these can easily be checked client-side, some require server-side checks. What's the best way, perhaps something similar to DataAnnotations validation, to provide warnings to the user in such cases? The key here is that the user has to be able to override the warning and still submit the form (or re-submit the form, depending on the implementation). The most viable solution that comes to mind is to create some attribute, similar to a CustomValidationAttribute, that may make an AJAX call and would display some warning text but doesn't affect the ModelState. The intended usage is this: [WarningOnFieldLength(MaxLength = 150)] [WarningOnPossibleDuplicate()] public string Name { get; set; } In the view: @Html.EditorFor(model => model.Name) @Html.WarningMessageFor(model => model.Name) @Html.ValidationMessageFor(model => model.Name) So, any ideas?

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  • How to read binary column in database into image on asp.net page?

    - by marko
    I want to read from database where I've stored a image in binary field and display a image. while (reader.Read()) { byte[] imgarr = (byte[])reader["file"]; Stream s = new MemoryStream(imgarr); System.Drawing.Image image = System.Drawing.Image.FromStream(s); Graphics g = Graphics.FromImage(image); g.DrawImage(image, new Point(400, 10)); image.Save(Response.OutputStream, ImageFormat.Jpeg); g.Dispose(); image.Dispose(); } con.Close(); This piece of code doesn't work: System.Drawing.Image image = System.Drawing.Image.FromStream(s); What am I doing wrong?

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  • By knowing VC++ MFC, how 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 to stream audio from ASP.NET MVC controller when it's still encoding?

    - by kyrisu
    Background I have wave files on my server that I want to stream. Because of the size I want to encode them to mp3. I've tried to use FileStreamResult - but it doesn't work because as soon as program leaves the controller stream is closed and I get - "Cannot access a closed stream" FileContentResult - but it's not a stream and the user would need to wait for encoding to finish Question Is there a way to stream audio from the controller while it's still encoding?

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  • ASP.NET MVC DataAnnotations different tables. Can it be done?

    - by mazhar kaunain baig
    i have a language table which is as a foreign key in the link table , The link can be in 3 languages meaning there will be 3 rows in the link table every time i enter the record . i am using jQuery tabs to enter the records in 3 languages . OK so that thing is that there will be three text boxes for every field in the table.link name field will have 3 text boxes, description will have 3 text boxes and so on. i am using LINK to SQL with VS2010. i will be creating link class with MetadataType so how will i handle for eg link name attribute 3 times

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  • Redirect to current view on error in asp.net mvc?

    - by Pandiya Chendur
    I use TempData["message"] which internally uses session.... It works for me but when i do a return RedirectToAction("Create"); my other values are not restored because i am redirecting to Create view... Any suggestion how to retain the values of textboxes in the view..... if (!regrep.registerUser(reg)) { TempData["message"] = string.Format("{0} already exists", reg.EmailId); return RedirectToAction("Create"); } else { return RedirectToAction("Index"); }

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  • Is There A Way To Apply CODE Formatting To A VB.Net TextBox?

    - by Jeff
    I'm playing with a simple string replacement editor for editing VB.Net functions outside of VB. Is there a way to apply VB.Net code formatting to a string? For example. The txtboxCodeEntry looks like this: If strVar="dummy" then 1 else 0 Endif I would like it to "autoformat" to: If strVar = "dummy" Then 1 Else 0 End If The formatting would match whatever formatting VB.Net does when you're editing code in the Visual Studio IDE. Thanks.

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  • How to dynamically load and switch the resource file in the web app (ASP.NET) without recompiling ?

    - by Thomas Wanner
    I would like to store the resource files (containing texts for labels etc.) for my web application in the database to be able to edit and create them dynamically later (probably in the UI). My idea was to store the whole resx file in an xml column and simply load it on demand - depending on the language and some other attributes of the current user when he is logging into the application or switching the context. The important thing is that the resources do not only depend on the culture info of the user but also on some context information that can be switched by user without logging off and on again (in our case called "group", not having anything to do with a group of users). Is it possible somehow to load the contents of the resources from an external source and simply switch them without web application being recompiled by the server ? I know that there are some interfaces on which I could hook up and implement a custom resources provider which reads from the database directly but if it could work somehow with the resx files it would probably make things a lot easier..

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