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Exception Reason:1, wrote a cycle of death, this is the most likely.2, the operation of large data volume, resulting in the status of suspended animation.Solution: Managed Debug Assistants in Debug---Exceptions, remove ContextSwitchDeadlock a front hook.Exception information: The CLR cannot convert from COM context 0x645e18 to COM context 0x645f88, which has lasted for 60 seconds. The thread that owns the target context/unit is most likely to perform

1.WPF multithreaded Modification UI Example:// Start thread Modify UI, throw exception ThreadPool.QueueUserWorkItem ((q) += {" Zhang San "null);Solution: Modify the UI by using the Dispatcher.begininvoke+ delegate methodEncapsulating code that modifies the UI in a delegate// Start thread processing New true; // set to a background thread, the background thread exits automatically when the main thread ends, otherwise the program cannot end Thread1. Start ();//threading methods, modifying butt

Let's look at the code first:var s = "Test"; var len=s.length;We know that the string declared in JavaScript like above is not an object, but since S is not an object, why is there a property of length?The reason is that in JavaScript, whenever you reference a property of a string (numeric, Boolean, and so on), JS converts the string to an object by calling new string (s), which inherits the string's method and is used to handle the property's reference. Once the attribute reference is finished,

1. Create a complextype.xsd file under the D:/xml practice directory2. Download the XJC tool, which can be downloaded at the following link:http://download.csdn.net/detail/u013998070/85696673. Open the command line and adjust to the bin directory of the XJC ToolkitIf you do not know what you need to enter, you can simply enter the XJC command to view it, as followsAfter you clear the relevant commands, enter the following instructions to generate the target Java codeThe schema that

I tried some of the methods offered online, and finally I solved some problems with SQL. 1 Select the problematic database in the Query Analyzer and enter:Exec sp_configure ' allow updates ', 1--Allows the system tables to be updated. Reconfigure with OVERRIDE 2. Run the following SQL statement:UPDATE sysobjects Set uid=1--all objects in the database are assigned to the user dbo 3. Execute the following SQL statement: Exec sp_configure ' allow updates ', 0--Shutdown system Table update Re

SQL database user cannot delete, prompting "the user cannot be dropped because the selected user owns the object" workaroundDue to the error of the MSSQL200 database, I restored an original database to the current SQL, at this time I came to the user, want to restore the user deleted, but the result is prompted "because the selected user has an object, so the user cannot be removed"Because PB automatically establishes the table with the logged-in user

Error: The calling thread cannot access this object because another thread owns the objectMain window Create thread, multithreading cannot call control directlyThe thread created by the main window Public MainWindow () { InitializeComponent (); New Thread (listenchange); T.start (); }Line Cheng: Public void Listenchange () { // Create a ListView item is not written, here is just an example of

Title, when a WPF child thread accesses the UI thread, assigns a value to the UI's control, and if it does not, it reports the exception: "The calling thread cannot access this object because another thread owns the object." ”The solution is as follows: // method One this. Dispatcher.invoke (Action)delegate() {// your code }); // Method Two App.Current.Dispatcher.Invoke (Action)delegate(

Error When deleting a user: MSG 15138, level16, state 1, line 1 The Database Principal owns a schemain the database, and cannot be dropped. Solution (SSMs ): 1. Find the user's schema 2. Find the db_owner In the schema and change the schema owner from test6 to DBO or another user. 3. delete user test6 Or use the following statement to delete the file: --- Query the schema owned by user test6 as db_owner Use DBA; Select

successful. You think people are casual, in fact, it is not so. There are things that you can see only by standing on that level.In this world, there is no shortage of wise people, but wise men.6.What I want to say is that good things are always fought and sacrificed to get.Will all the good things in the world be automatically put into your arms? Will the pie in the sky just fall into my open mouth? Especially the poor people like me, my competitors are the strength of my rich, they stand high

Tags: Database SQL Server 2008When using SQL Server to Do data mining, the user can not access the problem, so to the corresponding database add a login user Zhang, and give the appropriate permissions. When debugging, found that there is still a problem, so want to delete this user Zhang, and create a new user. An error message appears : The database principal has a schema in the database and cannot be deleted. (Microsoft SQL Server, error : 15138) Solution:Delete the schema for this user, an

With the development of the routing industry, wireless technology has become its development direction. Here we mainly explain the differences and connections between wireless routers, wireless APs and wireless bridges, I hope to have a deeper understanding of wireless devic

　　Wireless AP: AP for access point abbreviation, generally translated as "Wireless Access Node", which is mainly to provide wireless workstations to the wired LAN and wireless workstations from the wired LAN access to the wireless workstation in the access points covered by

Slow wireless network speed? How many times faster does the wireless network work? Try these tips !, Slow wireless network speed In the modern Internet era, the first productivity is the speed of Network. We can't do without wireless networks every day. We need wireless ne

Use of ruijie in Wireless AP (Wireless Router ruijie wireless Internet access cannot authenticate AP) [tested: win7, xp, ubuntu 12.04 LTS are OK]Many campus networks or enterprise networks require ruijie verification. Although ruijie tries to control the use of wireless routers to prevent a single account from being sh

When using wired routing + wireless routing to access the Internet and share wireless functions in an existing wired network, you can use a wireless router as a Wireless AP (Wireless switch). The configuration steps are as follows: 1. connect to and log on to the

When implementing wireless functionality in an existing wired network, you can use the wireless router as a wireless AP (wireless switch) and set the steps as follows: 1, a single connection and login to the wireless router, the wireles