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• DataReader or DataSet when pulling multiple recordsets in ASP.NET

  - by Gern Blandston

  I've got an ASP.NET page that has a bunch of controls that need to be populated (e.g. dropdown lists). I'd like to make a single trip to the db and bring back multiple recordsets instead of making a round-trip for each control. I could bring back multiple tables in a DataSet, or I could bring back a DataReader and use '.NextResult' to put each result set into a custom business class. Will I likely see a big enough performance advantage using the DataReader approach, or should I just use the DataSet approach? Any examples of how you usually handle this would be appreciated.

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• Asp.Net Impersonation Fails On First Try But Succeeds on Second

  - by KevDog

  We are using RDLC's in a Asp.net web application. For reasons beyond our understanding, the first call to the database server fails with the following error: An error has occurred during report processing. Cannot open database "TryParkingIt2" requested by the login. The login failed. Login failed for user 'EXTRANET\OurServerNameHere$'. Run the report again, it works. Huh? Update Click the button the first time, it fails. Click the button again, it works. The account being impersonated is a domain account.

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• ASP.NET calendar drawing control

  - by BCS

  I want to make a simple ASP.NET page that draws a months from a calendar and highlights given dates. (I'm not looking for a date picker.) What I have is a list of DateTime values and I need to display them a a nice way. Given that I'm a total beginner with ASP, simpler really is better. (I'd rather not, I'm willing to hack together something with StringBuilder and <table> if it's easier). p.s. I have no budget, so non-free controls will only be of use to other readers.

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• asp.net and Visual studio root directory question

  - by Mark Kadlec

  I am seeing something very odd and thought I would ask the Stackoverflow community if they knew the answer. I have an asp.net project that runs fine in one environment, but couldn't figure out what happened to the styles in another environment. In the first environment (Windows 2008 Server), the following link worked fine: <link href="/Styles/09/style.css" rel="stylesheet" type="text/css" /> but in the other environment (it's a Windows 7), I had to change it to work: <link href="../Styles/09/style.css" rel="stylesheet" type="text/css" /> Notice that the directories seemed to shift ahead one directory in the Win7, what's going on? It's like the "running" directory seems now be the \bin directory instead of the home! Which environment is configured correctly? How do I determine execution directory level? My concern going forward is pushing to a prod environment and guessing which configuration is correct. Any insight would be appreciated!

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• Available options for hosting FTP server in .NET application

  - by duane

  I need to implement an FTP service inside my .NET application (running as a Windows Service) and have not had much luck finding good/current source code or vendors. Ideally it needs to be able to respond to the basic FTP Protocol and accept the data stream from an upload via a stream, enabling me to process the data as it is being received (think on the fly hashing). I need to be able to integrate it into my service because it will stack on top of our current code base with an existing custom TCP/IP communication protocol. I don't want to write (and then spend time debugging and performance testing) my own protocol, or implementation. I have already found plenty of ftp client implementations, I just need an acceptable server solution.

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• .NET Multipage Tiff with Lossy Compression

  - by Adam Berent

  I need a way to take several jpgs and convert them into a single multi page Tiff. I have that working using GDI+ however it only works with the compression LZW which is lossless. This means that my 3 50KB Jpgs turn into 3MB multipage Tiff file. This is not something I can accept for the software that I am working on. I know that Tiff Image format can use a JPG compression scheme but GDI+ does not seem to support this. If anyone knows how to do this in .NET (C#) or of any component that does this conversion.

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• JQuery UI Dialog widget problem with IE and ASP.NET

  - by Tony_Henrich

  The JQuery UI Dialog model form widget has an issue with ASP.NET when a button on the dialog is clicked to submit the page. It doesn't work because the form elements in the dialog window are outside the html form tags. So I used the fix of doing $("#dialog").parent().appendTo($("form:first"));. It works in Firefox but not in IE because the modal window now appears to be part of the rest of the webpage which is disabled. Visually, this is evident by the stripes showing on both the modal window and the rest of the web page.

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• I can't display my pages on ASP.NET

  - by iva123

  Hi, I'm developing a web site with asp.net on localhost, I'm beginner. I wrote a login page and it works well. However when I click a link, the server can't load the page and gives this error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) Any idea?

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• StructureMap 'conditional singleton' for Lucene.Net IndexReader

  - by Gareth D

  I have a threadsafe object that is expensive to create and needs to be available through my application (a Lucene.Net IndexReader). The object can become invalid, at which point I need to recreate it (IndexReader.IsCurrent is false, need a new instance using IndexReader.Reopen). I'd like to able to use an IoC container (StructureMap) to manage the creation of the object, but I can't work out if this scenario is possible. It feels like some kind of "conditional singleton" lifecycle. Does StructureMap provide such a feature? Any alternative suggestions?

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• ASP .NET MVC Secure all resources

  - by Tim

  How to enable Authentication on whole controller and disable only for certain action methods. I want authentication for all resources. If I write something like that: [Authorize] public class HomeController : BaseController { //This is public [UnAuthorized] public ActionResult Index() { ViewData["Message"] = "Welcome to ASP.NET MVC!"; return View(); } //This is private resource public ActionResult PrivateResource() { return View(); } } Then anyone can access this resource. Do you have any ideas how to make it better way?

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• .NET ClickOnce not installing prerequisite files?

  - by proudgeekdad

  I have a .NET project that uses Crystal Reports. The application is distributed using ClickOnce. Things work great if the user has Crystal installed on their computer. However, not all of the end users have Crystal Reports installed on their computers. These users are receiving the following error... "Unable to install or run the application. The application requires that assembly CrystalDecisions.ReportAppServer.XmlSerialize Version 10.5.3700.0 be installed in the Global Assembly Cache (GAC) first." Is there a way to force ClickOnce installs to ensure that a prerequisite is installed?

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• Really lost with OpenID and ASP.NET MVC

  - by Stacey

  I'm attempting to implement OpenID with ASP.NET MVC (Yeah, we haven't heard that one before I'm sure!) That really isn't the big problem, though. My huge problem is that I am exceedingly confused about how to do this alongside an application that will need to store a lot of information about the logged in users (profiles, histories, etc) It seems to me that OpenID takes away the site-centric logic and makes it, well, open. This is all well and good if you just make an authentication ticket to be seen as a 'validated' user - but in all seriousness I am completely lost. Is it possible to implement OpenID such that logging in with it will allow users to 'exist' on my own application as if they had gone through normal registration?

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• How to manage changes to reports in .NET?

  - by Craig Johnston

  If I need to offer the ability to create, view and print reports from a .NET app, I see that there are 2 options: use a reporting component such as Microsoft.Reporting.WinForms.ReportViewer or Crystal Reports which saves a .rpt or similar template file that can be modified as required without having to re-compile the app use System.Drawing.Printing for reporting and store report template data in a database, which keeps things simpler and avoids problems with bulky third party reporting components If I want to be able to modify a report template (which would include layout and data fields) without having to re-compile the app, would the first option above achieve this? If I wanted to be able to modify the template without re-compiling the app, how could this be achieved with the second option? How could you store data representing the templates in a database such that it could be modified without having to re-compile the app?

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• disable a form in asp.net..

  - by rohit

  hi iam working on asp.net using c# project...iam facing a problem...the problem is,i had a master page in which iam using collapse pannel(ajax control)... in collapse pannel i had folders like:- xyz abc def ghi.... and in xyz folder i had some forms.... nw the problem is that i had a search menu in my main page(comes after login)...after searching a grid view is open and in that there is a column name (suppose) XYZ...so when i click on items in that column then only i want xyz folder to be enable or viewed so that i acess forms in that folder....hw cud i do that..i search alot but didn't get the solution..plz help me go through this...

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• ASP.NET Long Process and Sending updates to Browser

  - by user204588

  Hello, I've asked this before but I was hoping for another answer and perhaps some code samples because I've been having a difficult time with this. I have an asp.net page. The user hits the "Run" button and I have code IN AN ASSEMBLY, not in the APP_CODE folder that is called and runs a long process that moves product info from a file into the database. While the user waits, I would like them to see status updates like what product the import process in on and status info. I'm assuming I'd break off into another thread and use Ajax but I have no idea how to do this. Some code samples would be very helpful, thanks.

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• ASP.NET Windows authentication with wrong identity over VPN

  - by Dilyan Dimitrov

  I have ASP.NET application with windows authentication. When I browse it from home over VPN (Cisco VPN Client) as a username in the windows identity I get "\" not the credentials from the AD of the server (the same that I am using to connect to the VPN) even though I fill them in the prompt for localhost authentication from the browser. This only happens with Firefox. In the IE and Chrome after the prompt I get 401.1 Unauthorized page from IIS. How to make IIS to use the right credentials or the problem is somewhere else? Any ideas?

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• Best approach to a customer portal in ASP.NET MVC

  - by DoodleWalker

  Hi All, The problem: client needs a website to serve 10+ customers, each customer has 5-10 people they wish to grant access using login & user name, once "logged in" the user can download files specific to their company. The files will be uploaded to a directory under the customer name, and displayed as a list. Currently using membership for all of the users, it's just the "by customer" segmentation I'm wondering about. the question being under ASP.NET MVC what is the cleanest or simplest approach to solving the customer segmentation, trying to avoid customer membership provider so was going to use the roles to assign customer group. Thoughts appreciated.

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• silverlight vs ASP.NET MVC

  - by magellings

  I'm debating whether to use Silverlight 2.0 vs ASP.NET MVC for a web application. The web application will be a subscription free service marketing all age groups. It's important the source is highly testable, but also with the Web 2.0 movement a graphical web application is important as well for competitive reasons. I'm assuming silverlight is better than the ajax helpers/MVC graphically, but foundation-wise testing is better/easier with MVC. Possibly an MVP pattern with Silverlight could increase the testability of the source. Could anyone elaborate on the pros/cons of each technology and recommend one or the other based on the above? (addition 9/22/08) In regards to allowing search engines to index the site, using either technology it will utilize a backend database whereas a lot of the content will be dynamically generated. Based on some of the comments, when we talk of the searchable content would the home page of the application if written in silverlight be searchable? Would I be able to get the site to appear in a google search?

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• Compiled ASP.NET application can be viewed locally only

  - by cfdev9

  I have a development website running on my local machine, I can access it locally by typing the address http://mycomputer.mynetwork.local/myapp/default.aspx however when anybody else tries to browse to it they get an error: Server Error in '/' Application. The resource cannot be found. Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. I'm using IIS7, ASP.NET 3.5 and the application is pre-compiled. Any hints?

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• Avoiding configSections in .NET app.config files

  - by Chris Clark

  I'm looking for a way to avoid declaring my configuration section in the configSections inside the App.config file. Basically, I want to specify my configuration information just like I do for built-in .NET systems. For instance, when configuring WCF, I just put stuff in the <system.serviceModel>, I don't have to declare a section in the configSections up top. The same thing applies for <system.diagnostics> and many other namespaces. I know I could just load it up as an XML file and parse through it, but I'd prefer to stick with the pattern if possible. Moreover, looking at the WCF configuration with Reflector, I notice that it uses the same configuration subsystem (defined in System.Configuration). If you're wondering why this is important, it's because it's confusing our IT people. If it were self contained in one place, it would be much easier on them. I also realize I'll lose the ability to have multiple of the same section type, but that's not important in our case.

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• Can anyone recommend a .Net XML Serialization library?

  - by James

  Can anyone recommend a .Net XML Serialization library (ideally open source). I am looking for a robust XML serialization library that I can throw any object at, which will produce a human readable XML representation of the public properties for logging purposes. I never need to be able to deserialize. XmlSerializer's requirement of an object having a parameter constructor is too restrictive for what I want. DataContractSerializer does not give enough control over the output (which is not particularly human-readable). Any recommendations appreciated! Thanks

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• asp.net report generation - page cannot be diplayed

  - by user438640

  I have a asp.net application which generates reports.When the user clicks on generate report, the report is generated in the background and link to that report is written on the UI. There is no problem with the application as many of them are able to generate the reports successfully. However few users are facing issue is generating reports.The issue is, "When they click on generate report button, the report is being generated but before getting the link to the report,users are getting "page cannot be displayed" page" "And for few of them it occurs only in IE and not in mozila" Please help me in resolving this issue. Thanks in advance

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• ASP.NET request extension type

  - by Krishna

  Hello, I am working on a large web application which I have recently shelved tons of .aspx pages from the project. To avoid page not found error, I added these entities in the xml which came around 300+ in count. I wrote a http module that checks the request url in the xml entities and if they are found, my module is going to redirect the request to respective new pages. Everything works great, but my collection is getting iterated for all the requests, I mean for each and every .jpg, .css, .js, .ico, .pdf etc. Is there any object or property in .net that can tell the type of request that user requested for like HttpContext.request.type. So that I can avoid checking the request for all unwanted file types.

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• “OnClick” action to asp.net dropdownlist item.

  - by Luís Custódio

  My situation is a little strange I guess, suggestion of engineering is acceptable. I have a DropDownList, on my "user" creation, called "city". When I'm creating the user I can create other city, but for this I have a button which redirect to other page. So, ok. I've created the new City and now I click on my DropDownList of cities and guess what?! The field is not reloaded. My first idea is every that I click on DropDownList, reload the data, but I can't find some OnClick action for Asp.Net DropDownList. This is my question, some idea? Thanks in advance.

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• is it posible to upload directly to remote server using SFTP on ASP.net MVC

  - by DucDigital

  Hi! I am currently develope something using asp.net MVC, im still quite not experience with it so please help me out. I have a form for user to upload Video. The current ideal concept to upload to remote server is to Upload it to to the current server, then use FTP to push it to a remote server. For me, this is not quite fast since you have to upload to current server (Time x1) and then the current server push to new server (Time x2) so it's double the time. So my idea is to make user upload it to the current server, and WHILE user is uploading, the current server add the file to DB and also send the file to the remote server at the same time using SFTP... is it posible and are there any security hole in this concept? Thank you very much

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