.net-4.0

问题 I have a Web Application in .NET 4.0 Integrated mode calling a web service (ASMX) in .NET 2.0 Integrated mode on the same server via localhost. 9 out of 10 times all works fine, but occasionally the Web Application get's a "Request timed out" and "Thread was being aborted" error during the call. It gives the error on the last line of this code example: Dim Service As New localhost.Service Dim Input As New localhost.InputProduct Dim Ret As New localhost.OutputProduct Try Ret = Service

问题 When I define a model in Entity Framework with Table-per-Type Inheritance, if I have a base class/table (not abstract) called person, and two sub entities and tables, adult and child, after creating a child, how would I take the same object and convert it to adult? Once converted to adult, the child record should be deleted, though the base class data in the person table should be retained. 回答1: It is not possible. It is similar problem like here. Simply the entity exists and its type is

问题 I have just created a WPF application and just been wondering where is my app.config file? I looked in the bin/Debug and bin/Release directories and there is just one file "WpfApplication1.vshost.exe" and could not find any app.config file. All I can do is Add->New Configuratin File and this too, doesn't come in debug or Release folder. Can anyone guide me whether I should manually copy and paste it in the debug or Release Folder? So finally: the ANSWER If app.config does not exist, then try

问题 I have a gridview that is being populated from a datasouce. The Stored procedure that is populating the datasource, has a field "Client" and a field "Client WebSite". I want to populate the field "Client" in the gridview column called "Client" which would be a hyperlink field and the hyperlink field would be the "Client WebSite" value from the dataset. The client website is an external site (not within my asp project) Below is my html code. How can I get the "Client WebSite" appear as the

问题 Using TPL / Parallel.ForEach is there an out-of-the-box way to limit the number of times a method is called per unit of time (i.e. no more than 50 calls per second). This is different than limiting the number of threads. Perhaps there's some simple hack to make this work? 回答1: One solution is to make a thread-safe version of the following https://stackoverflow.com/a/7728872/356790 /// <summary> /// This class limits the number of requests (method calls, events fired, etc.) that can occur in a

问题 I've got a fairly large MVC2 project in TFS which gets built automatically on checkin (Continuous Integration) At present, the fully built version is dumped on a network share on our dev IIS server. \\Server\wwwrootLatest TFS of course creates lots of sub-folders since it's just doing a build, it isn't even aware that it's drop directory is a wwwroot. This means that to actually USE the build, we need to go and manually create an IIS App which points at the appropriate directory - which

问题 How come this isn't working? private static object Lock_HandleError = new object(); public static void HandleError(Exception ex) { lock( Lock_HandleError ) { //IF the UI is processing a visual tree event (such as IsVisibleChanged), it throws an exception when showing a MessageBox as described here: http://social.msdn.microsoft.com/forums/en-US/wpf/thread/44962927-006e-4629-9aa3-100357861442 //The solution is to dispatch and queue the MessageBox. We must use BeginInvoke because dispatcher

问题 I need to use MemoryMappedFile class in .net 3.5... is there any way to find the code of the classes used in .net 4.0 and create to use in .net 3.5? thanks in advance 回答1: If you need memory mapped files in .NET 3.5, you could also write your own wrapper around the respective Win32 methods from scratch. This might take a bit more effort, but it avoids any licensing issues. 回答2: .NET 4 uses a whole new CLR, and I wouldn't be at all surprised to find that enough had changed under the hood to

问题 I know that Roots are : static fields method parameters local fielfs f-queue which also holds a pointer to the " going to be finilized" objects cpu registers <=??? Now lets talk about registers. the code whch they can contain is like : mov bx, 0034h ; bx = 52 (stored in 16 bits) mov cl, bl ; cl = lower 8-bits of bx mov eax, ecx call print_int but wait ! If im not mistaken , this is the actually code which was Holding those those static , local and parameters - from the first place ! So why to

问题 My ini file does not have any section. It has following data com.ibm.rcp.toolbox.admin/toolboxvisibleChild=false com.ibm.collaboration.realtime.community/defaultAuthType=ST-DOMINO-SSO com.ibm.collaboration.realtime.brokerbridge/startBroker=false com.ibm.collaboration.realtime.webapi/startWebContainer=true I want to use function. [DllImport("kernel32")] private static extern int GetPrivateProfileString(string section, string key,string def, StringBuilder retVal, int size,string filePath); My