AJAX :: Fastest Way To Retreive Data From Database From Webservice?
Jan 25, 2010
I'm using Webservice which will return the data from the database through datatable and I'll convert the datatable into byte array. In front end, I'll reconvert the bytearray to datatable and used ajaxloader to display it in the form.. It is dynamic loading. So, for each click, it is taking 10 seconds to retreive the data regardless of the size of the data. So, I used static datatable and I've loaded all data in that datatable in page load event. But, no reaction. It is taking only same time. Even, there is no data to retreive, the ajax loader is going on loading for 10 seconds. Problem is with Ajax or my webservice?? Plz, tell me some other idea??!!
my aspx page user is creating a request and when the request is created a request_id is generated automatically in databse..i want to retreive tht particular request_id and display it on the same web page.
I am trying to complete my function below but got lost in the different methods out there. It will always return 1 row and I need to get the values of the record and ADD into a new row. The function returns a DataTable.
I would like to use the ajax slideshow extender and getting the Image Url stored in a databaseso far my webserivice look like this..but I think im making a mistake somewhere..its not working
<WebMethod()> _ Public Function GetSlides() As AjaxControlToolkit.Slide() Dim Connection As SqlConnection
i need code for selecting rows in a gridview....in my gridview i have rows as image,logo,position and alpha values ....i want to retreive these details from gridview to perform watermark.
I wanted to use using database to populated the dropdownbut i am getting error as type or list space cannot be foundat ListCountry GetCountriesas its defined staticthe web methood code is in the same aspx.cs pagehow culd i use it if a different webmethod page .asmx is created
I have a bytes of data. Eg : 1024 bytes. And in that, say "Name Age Occupation" etc. All are only values. I have another skeleton xml which will have the <Name/><Age/> etc.
I need to loop through the bytes, say first 5 bytes is Name, Next 2 bytes is Age etc and fill up in this XML. I'll have 1000s of records and so need to know which way is the fastest.
Will the code be fastest or is there any way i can do by XSLT or similar component?
I am a .NET / C# back end guy. I am working on a app that will have about 200 different data entry screens. For me exposing DTO as a collection for CRUD (IUpdatable and IQueryable) is the easy part, I can do it in my sleep :-). What I am trying to decide is what type of front end technology will allow me to develop these data entry screens fast. They don't have to be fancy but they are not just plain grid either and on average they have about 15 form fields and some client side data validation (no db look up) Options I am looking at are
Use ExtJS on the front and REST / JSON on the back. ASP.NET RIA but I do not know SL (Well XAML) Plain ASP.NET / MVC One idea I had was the DTO will contain the meta data about the form (As Attributes) and the form can be dynamically generated, but I do not want to reinvent the wheel if there is an easier way. I have looked at RAD software but all of them look at the DB and generate screens. I'd rather want something that can look at my DTO and generate screens.
Here I'm using three tables given below. As u can see in the below three tables, 3 columns(P_Id,PdtName,PdtImgUrl) are same. Now can any body tell me how can I retreive values of 3 columns(P_Id,PdtName,PdtImgUrl) without repeatition.
I'm not too familiar with webservices, so I was wondering the following:
I'm receiving data from a webservice. I want to save this to the database, but first I have to compare it to the data that's already there. I can get a recordset from the db and loop through it. But how should I compare it to the data from the webservice? Retrieve all the info from the service, put them in objects and create an equals method, and, if it doesn't exist, add a new record? This seems to me, that's the way to go, but since it's, in my opinion, a common task, maybe there's some object/method that does this automatically for me.
I am working on an application just like any fast food restaurant uses for example McDonalds.
Basically, application consists of three parts.
1) Web Application # 1 to take orders (Used by the clerk(s))
2) Web Application # 2 to process orders (used by the chef back in the kitchen)
3) WebService returns new orders (with PENDING status) to Web Application # 2.
Write now, Application # 1 adds new orders to the database. Application # 2 calls the WebService to get new ordes by REFRESSHING the page again and again. Refreshing the page over and over again is the problem.
I want the WebService to automatically send new data (oredrs with PENDING status) to Web Application # 2 whenever Application #1 add new order.
Application # 1 can call WebService (sending true flag) to let it konw that something has been added so the WebService can broadcast new date to Application # 2
Here is the flow which I am trying to achieve
Application # 1 (Takes new Order) Application # 1 then call WebService (sending true)
WebService (if true is received), send new data to WebApplication # 2, cause postback on Applicatin # 2 automatically
For Example just imagine when you walk in McDonalds
Clerk takes your order -> New order is automatically send to the Kitchen (to process order)
Here is the breakdown
Application # 1 = Clerk taking order WebService = Mechanism which is sending new order to Kitchen Application # 2 = Monitor in the Kitchen receiving orders.
My scenario is create a webservice(regional weather prediction, or currency rate), and a client application having a updatepanel and then consume that service.Now, when webservice changes its data(temperture goes up or down, rate changes)I want to ask is there any way client can aware that webservice has changed so it will update properly.
I am using a web service to pass back search results. To do this I am using ToolkitScriptManager with a ServiceReference to my web service and calling the web service up with javascript. The javascript call looks something like this:
If the request is successful the "OnSuccessGetData" function is fired and the results are inserted into a DIV tag. Because the resulting search results can be large I wrote the service to only pass back the first 20 results on the first trip. After that I make calls again to the service to return the next 5 results and continue to do this until all the results are loaded. This all works wonderful. You can see it in action at www.lsbio.com and use the search term "human mouse". My problem is that when the user clicks on a product and then hits the 'Back' button the search results have to be fetched again from the webservice.
Is there a way to keep the search results in the DIV tag to remain as part of the page so when the user navigates away from the search page and uses the 'Back' button to navigate back the search results are still there without having to hit the webservice again?
If I didn't make myself clear enough on what I am trying to do, go ahead and test the site www.lsbio.com, use the search terms human mouse, click on a product and then hit the back button.
I've an arraylist having 30000 items in it, what's the best way of creating a text file on the fly from an ASP.NEt page? Currently I'm using the code below but it times out with large data,
Using fileStr As New FileStream(sFileName, FileMode.Create, FileAccess.Write) Using writer As New StreamWriter(fileStr) writer.WriteLine("Error Messages") [code].....
I'm trying to optimize my ASP.NET thumbnailing script, so it doesn't resize all the images all the time, and one part of the problem is choosing the hash function for the thumbnail naming/checking procedure.Is crc32 up to the task - I'm asking cause the input data is small(only relative path, size and date)?
I have one main doubt for long perioad, If we access the DB using SqlDataSource and ObjectDataSource, Can i know which is the fastest accessing the DB.
am having a few problems trying to get a textbox I added to a gridview.Adding the textbox to gridview in the form load event
Code: Dim txt As New TextBox txt.ID = "txt1" txt.Width = 20 txt.Text = 1 GridView1.Rows(0).Cells(0).AddAt(0, txt) change value in textbox and click Update
Code: Protected Sub btnUpdate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdate.Click lblUpdateValue.Text = ctype(GridView1.Rows(0).Cells(0).Controls(0), textbox).Text End Sub The problem is that there is now no textbox in that cell even tho it is visible on webpage and I can even type in it?????
I am trying to run a linq query but I need the result as a datatable as I am using that to store records from different queries in the same viewstate object.The 2 versions below compile, but return an empty set. The exact error is "Value cannot be null.Parameter name: source". (and yes I have checked there is data):
MyDatabaseDataContext db = new MyDatabaseDataContext(conn); IEnumerable<DataRow> queryProjects = (from DataRow p in db.STREAM_PROJECTs.AsEnumerable()
I've done a lot of searching on this here but I can't seem to find anyone who has done this. I'm sure it's a common problem but I can't figure out the right keywords to search for the solution so I'm sorry if this is a duplicate.I have a dataset where I've used the Generate Insert, Update, and Delete statements as well as the Refresh the Data Table options so that I can retrieve the last inserted ID when I'm using an ObjectDatasource.however, when I'm handling the ObjectDataSource-Inserted method, I'm getting a 1 as a return value, which I assume is the affected rows. I don't want that, I want the ID so that I can use it in my code.I looked at the generated code for the insert method and it is doing a SELECT after inserting, but it returns the whole row not the ID, so how can I get at this row to retrieve the value?
I am working on a website that uses SQL database. However, the database need to be populated every 24 hours by importing records from a text file. Can I use webservice to read text file and import records into database every night?
The Website will be in use 24 hours. Can Webservice still import records into database while website is being used?
