In the web development, we often use the page closure event onbeforeunload, can give the user a choice to abandon the closure of the opportunity, such as this blog editor. If the user chooses to leave, then the OnUnload event will naturally trigger, but how to detect if the user chooses to cancel?We assume that a page leaves the cancellation event, called Onunloadcancel. Obviously, this event should be triggered after the user presses the
After we enroll in the Tencent class, we will show the enrolled courses on the Group page. So, if we don't want to listen to this course, how do we cancel these courses?
First into the Tencent Classroom home page, click on their QQ nickname into the "My Course":
Or you can directly in the Group page right click on the course, choose to enter the "View course Details" entry, and then click on the upper right corner of the nick
Cancel a task
Describe
A running task can be canceled through this interface. Only two types of tasks are currently supported for Importimage and Exportimage.
Request parameters
name
type
whether you must
Description
Action
String
Is
Operation interface Name, value: Canceltask.
RegionID
String
Is
Domain ID
TaskId
String
Is
Task ID
return par
The steps to cancel the template display in word2013 are as follows:
Step one: Start Word2013, click "Blank Document" in the template Selection page to enter Word edit page (also optionally choose a template to enter).
Step Two: Click "File" in the upper-left corner of Word.
Step three: Then click "Options" on the left side of the file page, and then pop up the Word Options window.
Step four: Click to go to the
word2013 automatic numbering how to cancel?
word2013 method of canceling automatic numbering
Step one: Do not want the number is, before the number of a lightning bolt icon, click on the back of the small triangle, will pop up a shortcut menu, there is an "undo AutoNumber", you can go.
word2013
Step two: When automatic numbering occurs, press the BACKSPACE key two consecutive times, or you can can
How to cancel Win8 system computer's power-on password?
Win8
Win8 boot password How to cancel?
Press the Win+q shortcut key to open the search bar;
Enter in search field: Netplwiz
Win8 Search Bar
How to cancel Win8 system computer's power-on password?
To use this computer, the user must enter a username and password to remove the tick;
Win
In the system, you can set the "do not ask before shutdown" to achieve the "one key shutdown" purpose. However, in the Win7 system, the "Cancel shutdown prompt" is set, but the "one program needs to close" prompt will still appear when the computer is shut down.
When the shutdown occurs, most of the system is "waiting for task Host Windows." You can view the "Cancel shutdown prompt" in the settings.
Click
A lot of people in the WPS print preview when you see the preview will show a split line, in order to better preview the effect we can remove the split line, so how to cancel the print split lines? Let's take a look.
As shown in figure:
WPS Tutorial How to cancel Print preview split line
In fact, these dotted lines are automatic page breaks for the WPS table, which is used to differentiate the pri
Win7 How to cancel the wireless network connection automatically? Do you have any difficulty in using Win7 's small partner at ordinary times? Small series can come to help you oh, this is not, and recently a small partner asked small, Win7 system is always automatically connected to the wireless network has been connected, but do not want to use this network, how to screen out the automatic connection to the wireless network? Below let small make up
I. Set MyEclipse auto-prompt function from a~z1. "Window" → "Preferences"2. Select "Java", expand, "Editor", and select "Content Assist".3. Select "Content Assist" and see the "Auto Activation triggers for Java" option under "Auto-activation" on the right and right. Actually, it means "." is the trigger code hint. This symbol.4. "Auto Activation triggers for Java" option in "." Add A~z and A~z, respectively, to facilitate the subsequent search and modification. Then "Apply" and click "OK".Two. T
If you accidentally open the QQ WiFi sharing feature we are shown below
If you are a WiFi host and do not want to share it with others, you can cancel the WiFi share in the following way.
Mode one: Modify WiFi password
Modify WiFi password This is no way, because there seems to be no way to cancel, we just go to the router to modify the WiFi codon (tplink wifi password where modified).
Mode two: Sen
Friendly tips, if you cancel the lock screen under the state of the photo machine then you will find that we can not directly achieve a quick photo shoot oh.
1. In standby mode, click "Application".
2. Click "Set".
3. Click on "Lock Screen".
4. The "Camera shortcuts" to the hook to cancel.
Set the effect chart contrast:
Well, after that, if you want to take a
How do I cancel a page break?
Operation Steps:
1, open the Word menu bar of the editing options, and then in the pop-up menu to choose to find replacement, or directly with the keyboard shortcut to open, that is, ctrl+f combination key open;
2. Under the Replacement tab, there is an advanced button, that is, we can find the specific symbol representing the contents of these symbols, that is, the page break symbol;
3, clic
Usually the computer has its own screen locking function, which can be set to protect the role of the computer to avoid being used, in the Ubuntu system, if you want to cancel the screen lock function, how to deal with it? The following small series to introduce the next Ubuntu cancellation screen locking method, together to learn under it.
Ubuntu is designed to automatically lock in minutes, and you must enter a password to unlock it before you use
How to cancel the display of the Baidu search box in the computer task bar
1, right click on the task bar Baidu Search bar Baidu Small paw icon, click on the "Settings";
2, will automatically open the browser and enter the advanced settings, find the taskbar search box, uncheck the "Open Desktop taskbar search box";
3, cancel the check, the task bar in the Baidu search box is removed;
4, the las
This section focuses on the use of cancellationscope in exceptions and the use of cancellationscope in parallel.
This example downloads:
Http://files.cnblogs.com/foundation/CancellationScopeSample.rar
This example illustrates
Cancellationscope Cancel Container
Class name
System.Activities.Statements.CancellationScope
File
System.Activities.dll
Structure description
Inherit nativeactivityis a seale
In android, the response of the animator and its listeners to the cancel and end operations
1. When multiple animations exist in the AnimatorSet and the set and animator listeners are added:
During start, the start method of each animator listener is executed, and the start method of the set listener is called.
When you call the cancel () method of the AnimatorSet, The
Use the Immutable. js-based instance code to cancel the redo function, and use immutable. js to redo
The browser becomes more and more powerful. Many functions originally provided by other clients are gradually transferred to the front-end, and front-end applications are becoming more and more complex. Many front-end applications, especially some online editing software, need to constantly process user interactions during operation, and provide the
A very important thing is that asyntask has never been called to cancel the call. Now I have encountered a problem and want to cancel it?
The following are some of my understanding on the Internet, but it is best to experiment on your own before deciding how to do it.
Finally, I decided to process it in the ondesdroy () method of fragment as follows:
@Override public void onDestroy() { super.onD
Here is a summary:
Document address
Cancelling a task
A task can be canceled at any time by invoking cancel (boolean ). invoking this method will cause subsequent callto isCancelled () to return true. after invoking this method, onCancelled (Object), instead of onPostExecute (Object) will be invoked after doInBackground (Object []) returns. to ensure that a task is canceled as quickly as possible, you shoshould always check the return value of isC
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