exception

问题 I'm getting a "SocketException: Bad file number" while attempting to read from a socket in an Android app and I have no idea what this means. I've googled it and haven't found any explanation of what it is. Any ideas? Thanks. 回答1: This is usually the result of the underlying socket being closed. The "number" is because file handles in the underlying C code use file numbers to identify handles. The socket may be closed by you, but it may also be closed by security exceptions, flaky network,

问题 I'm getting a "SocketException: Bad file number" while attempting to read from a socket in an Android app and I have no idea what this means. I've googled it and haven't found any explanation of what it is. Any ideas? Thanks. 回答1: This is usually the result of the underlying socket being closed. The "number" is because file handles in the underlying C code use file numbers to identify handles. The socket may be closed by you, but it may also be closed by security exceptions, flaky network,

问题 I'm getting a "SocketException: Bad file number" while attempting to read from a socket in an Android app and I have no idea what this means. I've googled it and haven't found any explanation of what it is. Any ideas? Thanks. 回答1: This is usually the result of the underlying socket being closed. The "number" is because file handles in the underlying C code use file numbers to identify handles. The socket may be closed by you, but it may also be closed by security exceptions, flaky network,

问题 I'm using two DataContext objects to return seperate AsQueriable() datasets then joining the two using linq. The data construction works perfectly however when I pass that combined dataset to the view, I'm getting the error 'object' does not contain a definition for 'Name'. During a debug session I can clearly see that both the parent Model and each 'item' in the foreach loop has all the data and keys visible/accessible. I'm very confused. Many of the other q&a's on stackoverflow.com that

问题 It's the first time I've written JUnit tests and I came across the following problem. I have to write the tests for an abstract class and I was told to do it this way: http://marcovaltas.com/2011/09/23/abstract-class-testing-using-junit.html However, when I try to run the first test I get an InstantiationException like this: java.lang.InstantiationException at java.lang.reflect.Constructor.newInstance(Constructor.java:526) Here's the test I'm running: /** * Test of setNumber method, of class

问题 I have an MFC application compiled with /clr and I'm trying to implement a final handler for otherwise un-caught managed exceptions. For native exceptions, overriding CWinApp::ProcessWndProcException works. The two events suggested in Jeff's CodeProject article, Application.ThreadException and AppDomain.CurrentDomain.UnhandledException , are not raised. Can anyone suggest a way to provide a final managed exception handler for a mixed executable? Update: It appears that these exception

问题 I'm in charge of the maintenance of a C# application (VS 2005). This C# applications calls a dll ("mydll.dll"). I needed to make a few changes on the dll in question. I have the file "mydll.vbp" that was written in Visual Basic 6.0. I made my changes in Visual Studio and, then, "made "mydll"" from the Visual Basic interface. The problem is that, now, at each time I try to instance a class from "mydll.dll" in debbuger mode in C#, I have the following "InvalidCastException" Unable to cast COM

问题 I'm getting a "only run on the main thread" exception somewhere deep inside (or after) [self.navigationController pushViewController:controller animated:YES]; The thing is it only happens on Simulator and not while debugging in an IOS device. Any chance I can work around this? The dump: 2014-03-25 15:18:45.061 Cookila[657:5507] *** Assertion failure in void _UIPerformResizeOfTextViewForTextContainer(NSLayoutManager *, UIView<NSTextContainerView> *, NSTextContainer *, NSUInteger)(),

问题 public void Save() { XmlSerializer Serializer = new XmlSerializer(typeof(DatabaseInformation)); /* A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll A first chance exception of type 'System.InvalidOperationException' occurred in System.Xml.dll */ // .... } This is the whole class if you need it: public class DatabaseInformation { /* Create new database */

问题 public void Save() { XmlSerializer Serializer = new XmlSerializer(typeof(DatabaseInformation)); /* A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll A first chance exception of type 'System.InvalidOperationException' occurred in System.Xml.dll */ // .... } This is the whole class if you need it: public class DatabaseInformation { /* Create new database */