live-update | 易学教程

How to update page content while multiple users view it at the same time in PHP?

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问题 My page is visited by multiple users at the same time. User 1: visits the page and changes the name of title User 2: user 2 was already on that page but sees the old title, the title automatically has to be updated to new title. I know i can simply use AJAX to call every 5 minutes , but im trying to see if there is any other way possible that fires an event to all instances of the page opened by different users that if one of them is updated all other pages get automatically updated with

How to make live changes to SQL server express

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问题 I've been developing an asp.net web app using VS studio. I'm using SQL Server Express. During development I have been testing my web app on my server. Every time that I need to update my database I would simply delete my old database (located on my server) and upload my new DB. Since I'm only testing, and my app has no users, it hasn't been a problem. Problem: Once my site goes live I don't know how to make changes to my DB. Obviously I wont be able to simply delete it as it will contain user

update tableview if data is changed online

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问题 We are making an app for the hotel where we have already made an app where orders can be placed through app. All those orders can be seen on web portal by refreshing the page. Now client requested to create an app where waiter can see the order on his iPad. For that we will be having the tableview where all list of orders will be shown. However I am not getting how I will refresh the table/ add the data if new order is made. In short once order is made, at same instance waiter should get

How to do live updating similar to Google Docs?

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问题 I want to do something very similar to Google Doc's live updating - where all users can "immediately" see the actions of the other users in the doc. To achieve this, my ideas so far: Continuous AJAX requests being done in the background (this would seem performance-intensive)? Surely there's not a way for the server to push notifications to all its clients and update them accordingly? AJAX requests every X seconds with a buffer/time-lapse of actions to be accomplished in those X seconds

How to do live updating similar to Google Docs?

阅读更多关于 How to do live updating similar to Google Docs?

I want to do something very similar to Google Doc's live updating - where all users can "immediately" see the actions of the other users in the doc. To achieve this, my ideas so far: Continuous AJAX requests being done in the background (this would seem performance-intensive)? Surely there's not a way for the server to push notifications to all its clients and update them accordingly? AJAX requests every X seconds with a buffer/time-lapse of actions to be accomplished in those X seconds (simulating a real-time effect)? I would like to know others experience in trying to achieve this effect.

update tableview if data is changed online

阅读更多关于 update tableview if data is changed online

We are making an app for the hotel where we have already made an app where orders can be placed through app. All those orders can be seen on web portal by refreshing the page. Now client requested to create an app where waiter can see the order on his iPad. For that we will be having the tableview where all list of orders will be shown. However I am not getting how I will refresh the table/ add the data if new order is made. In short once order is made, at same instance waiter should get alert and table view should be updated. Note: iPad/ iPhone get the data through webservice. This can be