We have a requirment to draw a graph (line or bar), where the data will be changed 40 to 50 times in second , we want to refresh data automatically.
Which chart component should we use for drawing graph and how do i make sure that the data will be refreshed very fast on the graph web page.
I have a requirment to draw a graph (Cartesion chart), where the data will be changed 40 to 50 times within hour , i want to refresh data automatically.
Which chart component should i use for drawing graph and how do i make sure that the data will be refreshed very fast on the graph web page.
im using Vs2010 to plot real time line chart. i have been looking for the section that allow me to set X and Y axis..
i jus couldn't find the place for me to set.
my Y axis is a double, min =0, max = 100 and my X axis, min =0, max = 300(seconds).
I have a Table (in SQL Server) that is being updated roughly every minute or so with new records being inserted from various sources. The number of records inserted in this duration varies from a few records up to dozens of new records. I am using an update panel to rebind my data every minute to keep the GridView current. Now that I have the data refreshing I am looking for a better solution than reloading the data every minute. how to best keep my GridView up to date? Here is what I would like to accomplish:
1. Load the GridView and refresh the contents every minute. (60 second intervals)
2. When the GridView is refreshed every minute I would like to append only the new records to the existing grid, rather than bringing back the entire result set with each round trip to the database.
3. I would like a visual cue to identify the rows that have been inserted into the GridView. If new rows were to flash/flicker with a background color (yellow) that would be ideal.
Am I even using the correct control for displaying real time data, or are their other options? I essentially am looking to find the preferred method of displaying data that is being updated in real time in a web application. I'm hoping there is a solution involving AJAX but I haven't been able to find much on The Google. I am open to changing anything and everything about my approach -- this is largely a learning exercise. For testing purposes I am currently using LinqDataSource in conjunction with a GridView in an UpdatePanel being refreshed by a Timer control every 60 seconds. Informational: I have also started playing with the [URL] in place of the Timer control. However, for the purposes of this example I would be content to achieve the desired behavior using native controls as I have described them above.
I am creating a bar graph and line graph. I am using 2 dropdown list for the date and category. The user can chose the date and category that he want to view. I also have a upload button for the user to upload the excel file and dispaly the data in girdview.
However i have error whenever i want to view the graphs.. I have upload my code in the attachment. Pls take a look. I do the coding invb.
[code]....
I need to display the real time data in the label.
Explain In detail:
The camera is counting the people and store the counted value in database every minute.
so i need to pick the data and display it same on the screen. There are lot of cameras counting. So i need to take camera number and display respective count.
Camera NUmber
Counted Value
1
Label1(Display realtime data here)
2
Label2
I need to build a system which needs to show data on almost near real time basis from a MSMQ data source and this sould be showin in image with a circle as to where the incident occurs.
This is the description given.
The position of the Incident relative to the 123 mark is requested to be represented on a circular concentration diagram .
The algorithm will have to export the location of each incident relative to the 123 mark in polar coordinates (r,θ) and translate this position to the 'master image' coordinate system that will display Incident location.
I have two questions.
1. How can i show the data in an Image and also please point me to any material which might help me with the same.
2. How do i show almost real time data from a MSMQ data source and also how do i architect the same for performance.
Given a Database that has a table Called [Bid Transactions], which contains records of all available auctions that are currently running on an ASP.net website .. something similar to Ebay.com, when the deadline of the auction passed, I should close that auction, Send a notification message to both the item owner and the bidding winner to inform them.
how should I keep track of all open auctions? how could I monitor all their ending time and update the Auction status to be "Closed" on Real-time basis? ..
(1) Using SQL jobs ? .. that should reduce system performance .. shouldn't it ?
(2) A back-end service that is running on the server and uses Threading ? .. I have no clear background about that solution.
how to provide user notification about anything from database in asp.net like gmail ? see the pic for more detail :
[URL]
I found one link or web services [URL] which enable me to search whether email id exist in real world or not...Did some testing and it works. Is it possible to make similar web services and use it in my application? because i am not sure till what date this web services will work.
View 4 RepliesI was wondering how I would develop a page that allowed a user to type something into a text box that would show up in a label as they typed. I was looking for this online and found a few options but none of them worked. They included JavaScript, Ajax, and using the text box is onTextChanged command. For an example I need something similar to VistaPrint.
View 1 RepliesI have two checkboxes on web form chkYes and chkNo. When I click either I want the other one to be un-ticked. I have implemented the following in code behind;
[Code]....
Problem is ticking one tick has no effect on the other. What is the reason and how can I make it work?
I've noticed that page load time increases dramatically as you load up a ddlistbox with items. 10,000 or so results in a pretty much unacceptable wait time for my setup. The dropdown I'm trying to load is Airports - like all of them. What are some alternative UI solutions that give the user the ability to easily select any (literally) airport, but without a ginormous page loading time? (Currently the dd is keyed to the airport's 3 letter code, so it's convenient for the prepared user to just type the 3-letter code and have the right airport selected. The display is then set to code, city, country.)
View 7 RepliesHow to Display online users as green and offline as grey using real time updates..
View 1 RepliesI made a progress bar for uploading by using web services and javascript. But I got a problem. It is ever late web services than file save function. Thous, the information is not real in client side. How can I do?
View 1 RepliesI need to add a "real-time" element to my web application. Basically, I need to detect "changes" which are stored in a SQL Server table, and update various parts of the UI when a change has occured. I'm currently doing this by polling. I send an ajax request to the server every 3 seconds asking for any new changes - these are then returned and processed.
It works, but I don't like it - it means that for each browser I'll be issuing these requests frequently, and the server will always be busy processing them. In short, it doesn't scale well. Is there any clever alternative that avoids polling overhead?
I am working on a ASP.NET 2.0 application. It is hosted on IIS 6 on Windows 2003 server.
Few pages have jpeg images (around 50 images and 50 KB each). It takes long time to load the page for the first time. But when i open the same page for the second or third time it is faster.
why does a web page take long time to load for the first time?
Is it cached somewhere when it loads for the first time? Do we have any control over it?
i need to build asp.net program that connect to sql-server 2008 i have in my program row count that count my database rows. i need to see allwais this row count. is there any way to show this ? any refresh ? or i need to run all the time any query ? any timer? i need something that not take A lot of resources
View 3 RepliesI have a set of forms that user must fill, and those forms represent some html output. I want user to be able to see how his input will look like while he filling the fields. So, just wondering if anyone know's a good way or even maybe there is such a thing as plugin or something.
View 2 RepliesI'm looking for a way to put real time features into my web site. The idea is asynchronous communication between 2 people - like a chat session. If I use the chat example - I'd like the second person to know that the first one has sent a message to him, without refreshing or doing something active on the web page. Polling is not a good idea here - so is there any other solution? the back-end could be ASP.NET or PHP (ASP.NET preferred).
View 3 RepliesIam new to webservices,Till now I did not use web service.Anybody can you give a real time example for webservice.Please it will be very useful for me.
View 3 RepliesHow do you implement a real-time update like Twitter does ("423 more tweets since you started searching")? I need to refresh my page at least every 10 seconds. I'm using ASP.NET MVC and jquery.
View 4 RepliesI would like to display real time updates on a web page (based on a status field in a database table that is altered by an external process). Based on my research, there are several ways of doing this.
Long Polling (Comet) - This seems to be complex to implement Regular Polling - I can have an AJAX method trigger a database hit every 5seconds to get the current status. But I fear this will have performance issues.
Then I read about using SqlCacheDependency - basically the cache gets invalidated based on a field in the table. I am assuming I can use the event trigerred when the cache is invalidated to show the new update to the user?
I am newbie in the world of web application. I need ur suggestion.I am using oracle 9 in Aix platform. I have several sql queries that need to run periodically. I am planning to make web based application where in backend those query will be run and query result will show in my desktop PC. Query result need to refresh after 10 minutes.
View 1 RepliesI am developing a real time tracking system , we are using cisco apis for retrieving the current location and they store this value in a location server(cisco hardware) ie from that server we will get the x and y positions. Using this x and y posituions i need to show the path of the object. i need to continuouly connect this with location server and retrieve the x and y and needto show the path . How this will be possible. Currently we are uising timer and refreshing it with 5 seconds. Is there any other way so that we need to show the path as soon aspossible likle an ant moving along the surfacce.
View 5 Replies