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
Recently learned Angularjs, found using its own $http.post back to PHP to send data, PHP received the problem. Like what:
$http. Post ("php/getroleright.php", {rr: $scope. Currselect}). Success (function (response) {·});PHP usage
$_post[' RR ']Cannot receive the passed-over parameters.
Open Firebug found actually success, tossing the long time only found that it is only the format of transmission and ordinary transmission format such as the $.post
This article mainly introduces what is AngularJS? AngularJS is an introduction to AngularJS, which is a framework designed for Dynamic WEB applications. It allows you to use HTML as the template language. by extending the HTML syntax, you can build your application components more clearly and concisely. For more information, see
What is
AngularJS: the first basic AngularJS knowledge and the first angularjs
AngularJS learns about commands, filters, and other related content.
Command
AngularJS commands are extended HTML attributes with the prefix ng-
1. ng-app:
Defines the root element of
AngularJS self-learning path -- first understanding AngularJS and data binding, first understanding angularjsWhat is AngularJS?
AngularJS official documentation introduces it in this way. Client technologies fully written in JavaScript. It works with other long-history Web technologies (HTML, CSS, and JavaScript) to ma
This article mainly introduces AngularJS getting started tutorial (2): AngularJS template. This is the third article in the series. This series will use a project to explain how to use AngularJS, for more information about the dynamic features of these webpages, see AngularJS! Here we have added a test for the Controll
This article mainly introduces AngularJS getting started tutorial (2): AngularJS template. This is the third article in the series. This series will use a project to explain how to use AngularJS, for more information about the dynamic features of these webpages, see AngularJS! Here we have added a test for the Controll
Collection of the strongest AngularJS resources and AngularJS Resources
AngularJS is a JavaScript MVC framework open-source by Google. It makes up for the shortcomings of HTML in application construction. It uses the directive structure to expand HTML vocabulary, developers can use HTML to declare dynamic content, making Web development and testing easier.
Use angularjs to develop next-generation web applications (2): angularjs application skeleton (1) and angularjs next-generation
1. Call angularjs
1> load angularjs Library
It can be loaded from google's CDN (content delivery network) to get fast, and it can cache script libr
AngularJS: Article 2 AngularJS dependency injection and Article 2 angularjs
Introduction:
First, what is dependency injection?What is the difference between control reversal and dependency injection?Assume that application A needs to access external resource C. Here, container B is used (a framework program used to implement the IOC/DI function ).A needs to acces
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