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  • null value exception thrown when deserializing null value JSON.net

    - by Bharath
    Hi Friends I am trying to deserialize a hidden control field into a json object the code is as follows Dim settings As New Newtonsoft.Json.JsonSerializerSettings() settings.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore Return Newtonsoft.Json.JsonConvert.DeserializeObject(Of testContract)(txtHidden.Text, settings) But I am getting the following exception. value cannot be null parameter name s: I even added the following lines but it still does not work out. Please help settings.MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore settings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore settings.ObjectCreationHandling = Newtonsoft.Json.ObjectCreationHandling.Replace Thanks Bharath

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  • ASP.NET web application can't find an assembly

    - by Charlie Somerville
    I deployed an ASP.NET web application last night and I when I woke up this morning it was very slow and would occasionally just throw a 'Service Unavailable' error. I checked the Event Viewer and it was filled up with these errors: I'm puzzled as it was working perfectly when I deployed it (MonoTorrent is required to retrieve the number of seeders/leechers for a certain torrent off the tracker - this was working fine), but it's no longer working and whenever code that uses MonoTorrent gets involved, the worker process just crashes. MonoTorrent.dll is in the /bin/ directory.

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  • Winforms / .Net - dynamically creating install .exe or script

    - by Serexx
    Hello -- Does anyone know how I can Dynamically create an installation package that installs files into a folder that is determined at installation-runtime, not by the user, but by obtaining the UserAppDataPath for that specific user on that specific PC. By dynamically I mean that I must create the installation package programatically as part of another process. Any help ideas greatly appreciated!

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  • Weird switch behavior in .NET 4

    - by RaYell
    I have a problem understanding what's causes the compilation error in the code below: static class Program { static void Main() { dynamic x = ""; var test = foo(x); if (test == "test") { Console.WriteLine(test); } switch (test) { case "test": Console.WriteLine(test); break; } } private static string foo(object item) { return "bar"; } } The error I get is in switch (test) line: A switch expression or case label must be a bool, char, string, integral, enum, or corresponding nullable type. Intellisence shows me that foo operation will be resolved on runtime, which is fine because I'm using a dynamic type as a param. However I don't understand how if condition compiles fine when switch doesn't. Code above is just simplified version of what I have in my application (VSTO) which appeared after migrating the app from VSTO3 to VSTO4 when one method in VSTO was changed to return dynamic type values instead of object. Can anyone give me an explanation what's the problem. I know how to resolve it but I'd like to understand what's happening.

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  • Implode a Object List in .NET 2

    - by serhio
    I have(.NET2) an List<Object> objects. I want to "implode" (PHP concept) this array to CSV(obj1;obj2;obj3...) What is the most efficient way? StringBuilder, string.Join? NB. Each object implements a specific override of ToString()

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  • Port forwarding to asp.net development server

    - by ile
    I have configured my router so that I can access my localhost from internet. But I can't manage to port forward it to asp.net development server. In router's port forwarding I did the same thing as for the localhost but only changed port number so that it is the same as the one that is assigned to my application, but this doesn't work. Any idea how to get it work? Thanks in advance, Ile

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  • How powerful is the <script> tag in ASP.NET ?

    - by MarceloRamires
    I'm new at web development with .NET, and I'm currently studying a page where I have both separated codebehinds (in my case, a .CS file associated to the ASPX file), and codebehind that is inside the ASPX file inside tags like this: <script runat="server"> //code </script> Q1:What is the main difference (besides logical matters like organization, readability and ETC), what could be done in one way that could not be done in another? What is each mode best suited for ? Q2:If I'm going to develop a simple page with database connection, library imports, access to controls (ascx) and image access in other folders.. which method should I choose ?

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  • How do I dynamically tell a .NET MVC application which datasource to point to?

    - by Bialecki
    I'm beginning a port of an existing ColdFusion application to .NET MVC and one of the first issues I'm running into is that in ColdFusion we use the fact that you can define multiple datasources and access them in a dynamic way so that a particular user can be pointed at a particular database. To give an example, I might have two databases, Foo and Bar which each have a table called Locations which store locations particular to that database. The databases are guaranteed to have the same tables, so that's not a concern. In ColdFusion, you can easily dynamically point a user towards a particular datasource because it's just a string which is configured via the ColdFusion administrator (or you could programatically modify an XML file). So the question is how to do this in .NET? And specifically, I think I'd really like to use the Entity framework to leverage the ORM support it'll offer to perform operations on the data in the database, but I'm not sure how to do that (hopefully it's possible). Any thoughts?

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  • Hosting my ASP.NET website - ANY recommendations?

    - by Etienne
    I have a website hosting here in South Africa, but I am receiving terrible service from my hosting company. My database is down all the time and I cant get hold of anyone over weekends. I would prefer a company in the USA to host it who will be available 24/7 for support. Who would you recommend me using to host my ASP.NET site?

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  • removing diffgram from .net web service returning dataset

    - by FrenchiInLa
    per my client request I have been requested to return a dataset. basically it's an arraylist that i convert to dataset as follow DataSet ds = new DataSet(); DataTable tbl = new DataTable("Table"); DataRow drow; tbl.Columns.Add("ID", Type.GetType("System.String")); tbl.Columns.Add("Name", Type.GetType("System.String")); foreach (NameIDPair item in AL) { drow = tbl.NewRow(); drow["ID"] = item.ID; drow["Name"] = item.Name; tbl.Rows.Add(drow); } ds.Tables.Add(tbl); the problem with my client is this web service add a diffgram like diffgr:hasChanges="iserted" tag to each row, and they're pretending is not consistent with other web services used by them. How can I remove this tag in the XML returned? Any help would be greatly appreciated. Thanks

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  • Connection Timeout exception for a query using ADO.Net

    - by dragon
    Update: Looks like the query does not throw any timeout. The connection is timing out. This is a sample code for executing a query. Sometimes, while executing time consuming queries, it throws a timeout exception. I cannot use any of these techniques: 1) Increase timeout. 2) Run it asynchronously with a callback. This needs to run in a synchronous manner. please suggest any other techinques to keep the connection alive while executing a time consuming query? private static void CreateCommand(string queryString, string connectionString) { using (SqlConnection connection = new SqlConnection( connectionString)) { SqlCommand command = new SqlCommand(queryString, connection); command.Connection.Open(); command.ExecuteNonQuery(); } }

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  • Scheduled Mail in asp.net

    - by Chendur Paandian
    Hai Guys, My application deals scheduled mail concept (i.e) every morning 6.00 am my users gets a remainder mail about their activities for the day... I dont know how to do this.... Many told use windows service but i will host my website on a shared server i may not get rights to do windows service... Is there any dll for sending mails at a schduled time through asp.net application ..please help me out guys......

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  • Slow ASP.NET site using IIS6

    - by lars
    Hi, I have two servers, one virtual and one physical, running the exact same site on both machines. Both machines are running on ~ 2% CPU load and very much RAM available for usage. Somehow the site, with cache turned off ofcourse, loads in ~ 500ms on the virtual machine (which is a dev-server by the way) but almost 3 full seconds on the physical machine. They're both running Server 2003, IIS6 aswell as asp.net version 2.0 Any ideas where I can start troubleshoot this? Best Regards LP

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  • How do I load an XML document, add and remove nodes, then apply it to a ASP DataGrid control?

    - by JFOX
    I have a pretty simple operation but am struggling with how to implement it. I am loading XML from an external data source using a DataSet.ReadXml(), the creating a new XMLDataDocument from that data set, then syncing the Dataset back to the XMLDataDocument like so: doc = new XmlDataDocument(dsDataSet); dsDataSet.EnforceConstraints = false; dsDataSet= doc.DataSet; Once loaded I do two things to the XmlDataDocument: Loop through and check if a purely meta node, count, exists right beneath the root node and if so remove it. a thumb node exists in a second level nodelist and if not, create and append it. This is all going a expected because the result of doc.save() looks correct. Where I'm having an issue is updating the Dataset, which is being applied as the data source for an ASP DataGrid. Once all the above XMLDoc manipaulation is done I do this: dsDataSet.Merge(doc.DataSet); dsDataSet.AcceptChanges(); I then apply the data set to the grid control: dgList.DataSource = dsDataSet; dgList.DataBind(); But, when I do this I get this error on the site: System.Web.HttpException: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'thumb'. What did I miss?

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  • What does ~ in the beginning of an URL in asp.net exactly do ?

    - by MarceloRamires
    I am editing a certain website which before used the port 80 (default) that was not required at the url (because it's default..) But the port had (for technical reasons) to be changed, and now it has to be informed. I can access the main page through ip:port\page like this: 1.2.3.4:81\page.aspx Every link in the website is composed like this: <asp:HyperLink runat="server" Text="random" NavigateUrl="~/fdr/whatever.aspx" /> And whenever I click on a link, the page doesn't load, but the URL is composed on the URL bar of the browser, then I simply add ":80" after the IP in the URL and it works. Due to the existance of querystrings (in other words, for already having access to the URL) I before thought that '~' in the beginning of a URL in a link was saying "keep in the same website, just change to this webpage in this folder", but if the port vanishes, I assume now that the address is requested (probably to IIS) the location of the current website. I want to know then (instead of having to add the port to each link in my website) how do I set up whoever is requested by the ~ in the link to add the port somehow. How do I do that?

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  • MS Office & WebDAV Server Engine for .NET

    - by costa
    On this website,http://www.webdavsystem.com/server/documentation/ms_office_read_only, it states that in order to open a writable version of a MS Office doc this condition has to be met: Your WebDAV server must be configured on site root. Is this still true? Because I tried the SqlStorage sample and it works fine. I deployed the application on IIS 7, under <server>/TestWebDav and MS Office 2010 opened the documents in the sample just fine. Thanks

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  • .NET Framework - Possible memory-leaky classes?

    - by Robert Fraser
    Just the other day I was investigating a memory leak that was ballooning the app from ~50MB to ~130MB in under two minutes. Turns out that the problem was with the ConcurrentQueue class. Internally, the class stores a linked list of arrays. When an item is dequeued from the ConcurrentQueue, the index in the array is bumped, but the item remains in the array (i.e. it's not set to null). The entire array node is dropped after enough enqueues/dequeues, so it's not technically a leak, but if storing only a few large objects in the ConcurrentQueue, this can get out of hand fast. The documentation makes no note of this danger. I was wondering what other potential memory pitfalls are in the Base Class Library? I know about the Substring one (that is, if you call substring and just hold onto the result, the whole string will still be in memory). Any others you've encountered?

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  • Suggestions for a web hosting site (both PHP and ASP.NET)

    - by eibhrum
    Hi, I'm just wondering if there's a web hosting site that offers hosting for PHP and ASP.NET at the same time. It would be great if you give me a site that offers free service. I would like to use it for testing purposes only. But I could still look for affordable one. Comments/Suggestions are welcome. Thanks.

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  • Mixed sessions with Classic ASP on IIS 7.5 and Windows 2008 R2 64 bit

    - by Marcin
    Recently had an issues with a server upgrade from IIS 6 on Windows 2003 to IIS 7.5 on Windows 2008 R2 64 bit. We have a number of websites running on Classic ASP. All the sites sit under a particular site, e.g. www.example.com/foo and www.example.com/foobar. On IIS 6 each site was set up as a virtual directory and things worked fine. Since moving to the new set up, a lot of websites seem to have mixed Sessions. To be clear, this is not a app pool recycling issue; rather the sessions are populated with information when the user hits the site and while browsing they get sessions from different sites. We've determined this based on - a few customers called up and reported having their shopping cart with items with names of items belonging to a different site - also our own testing showed that some queries being run would try to bring products in from a different site We've tried - disabling dynamic caching - converting each site to be a virtual application (if I understand correctly, the virtual directory/application concepts were changed/refined somewhat in IIS 7 although to be honest, I'm not clear what the difference is) - various application pool changes (using .NET 2 framework), classic and integrated modes, changing the Process model to NetworkIdentity), all to no avail. The only thing we haven't tried is changing it to run as a 32 bit application. We're not using http only cookies, so when I open up a browser and type document.cookie into the dev console in Firefox/Chrome/IE that there will be multiple ASPSESSIONID=... values whereas previously I believe there was only one. Finally, we use server side JScript for the classic ASP pages, not VBScript, so we have code similar to the below. //the user's login account as a jscript object Session("user") = { email : "[email protected]", id : 123 }; and if we execute a line of code like below: Response.Write( typeof(Session("user")) ); When things are running correctly, we get "object" - as expected. When the Session gets trashed, the output is "unknown" and we are also unable to access the fields within the JScript object (e.g. the .email or .id fields). Much appreciated if anyone can provide any pointers about how to resolve this, everything on google seems to point to different issues.

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