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
Phenomenon:restore the previously backed up database to the current SQL database and now delete the user from the database, but the result is that the selected user has the object, so the user cannot be droppedSolution:1. Open Enterprise Manager,
This article from http://www.cnblogs.com/goodcandle/archive/2005/11/07/ownapi.html
In my Article Home Finance Manager--Software Design There are two classes : Cmodelbase And Cffmmodel , Cffmmodel Yes Cmodelbase . At the time of design,
unordered modulesWhat is an unordered module, which converts a string into a 16-binary string type, is mainly used in network programming.1,json Module 1, for network transmission, cross-language, available types have an int str list-the "meta-ancestor will become a list dictionary-" double quotation marks 2, Cons: limited data types supported 1.json.dumps () Converts a character into a bytes type, used to transmit2.json.loads () Read bytes Typedic = {' Sword S
JDBC Transaction processing-Four principlesAtomic NatureConsistencyIsolation ofDurabilityThe first step: realize the transfer operationAssuming that in the account, Galen has a balance of 5000 yuan, Nerf has a balance of 2000 yuan,Galen wants to transfer 1000 yuan to nerf.public static void Outmoney (Connection conn,string name,int account) throws sqlexception{string sql= "Update t_account set Balance=balance-? where name=? "; PreparedStatement pst=co
1.Python dictionary (Dictionary)A dictionary is another mutable container model and can store any type of object.each key value of the dictionary (key=>value) pair with a colon (:) split, Each pair is separated by a comma (,) , and the entire dictionary is included in curly braces ({}) , The format is as Follows:D = {key1:value1, key2:value2}the key must be unique, but the value does not have to Be.The value can take any data type, but the key must be immutable, such as a string, a number, or
Sed-stream Editor for filtering and transforming textFilter and convert text for the stream editorsed [-nerf] [action]Parameters:-I modify source file danger-e perform SED action edits directly in command line mode-F writes the SED action directly in a file, and-f filename performs the SED action within the filename-R: Using extended regular expressions-n silent mode, all data from stdin in the default sed is generally listed on the screen, but if you
First, cross-site scripting attacks are caused by the lack of strict filtering of user input, so we must intercept the possible risks before all the data comes into our web site and database. The Htmlentities () function can be used for illegal HTML code including single double quotes. ; to nerf the tag $val = Preg_replace ($pattern, $replacement, $val); Filter out of the hex tags if ($val _before = = $val) {//No replacements were made, so exit the
1. Consortium, before entering the outer domain, the flight point of the cursed land, after the plane, into the castle, there is a NPC selling bread and wine, remember to buy a bottle of special wine (at the last position), which is the task item required by the first map. You can even buy more and then sell it at the external domain, I have sold 5g/person.
2. Remember to keep all white and unknown items.
3. Consortium, the first map, near the tribal camp, has a cave, and there is a goblin o
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