Reading Data From API Feed And Saving Into Files
Mar 17, 2011
I am reading data from an API feed and saving the chunks into files. When the files reach 10 MB I start a new file and write to that file. What happens now is that an entry (<entry></entry>) can get cut off at the end of a file and continues into the new file. I try and reconstruct the files by taking the last entry and combining it with the first entry of the next file but this is tedious and was wondering for better suggestion on handling the data transmission and file creation.
The data stream is of variable sizes and where one request can return 60 MB of data the next can be as little as 2MB. I know the data stream will end with a token </feed>but my problem is the cut off data in between. I guess I could just make the max size really large and then hope the data is never more than that but then I have to work with large text files and reading in and parsing would be a problem.
timestamp = DateTime.Now
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
If numbytesread > 123 Then
'timestamp = DateTime.Now
responseData = Encoding.UTF8.GetString
[Code] .....
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Mar 5, 2012
I have to create a school reward system. Currently i have written code for creating user accounts and logging into the system. I have been able to write to the file i need to and i have been able to log in. However i can only log in for the first saved account. when i hover over the stored variable whilst stepping through it appears that unnecessary gaps have been added to stored information...User.stored username is the data structure type that i have stored information as...
user.storedUsername = " TestStaff "
I believe it should be like this:
user.storedUsername = "TestStaff"
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Aug 14, 2008
I require some help in saving and reading files in Line by Line format, How would I save to a specific line in the text file, or read a specific line?
[Code]...
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Jan 2, 2011
i have been working on a Weather Application. I get a Rss feed from yahoo weather, i then look through it and get the details i need. now i am having trouble with getting the astronomy from the feed.
<yweather:astronomy sunrise="6:01 am" sunset="8:44 pm"/>
This is the code is as follows
Dim doc As XmlDocument
Dim ns As XmlNamespaceManager
Dim nodes As XmlNodeList
[Code].....
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Jun 10, 2011
I am currently working on a vb project. What I am trying to do is reading a XML file and saving all the data in to the Access DB. Once this is done, I read the data from the access Db and display it in the required fields in VB form. Issue is, when i store the value in the access, a weird character is assigned before and after the data. The character is a square box with question mark in it. Also the same character displays on the VB form as well
[Code]...
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Jun 16, 2009
I have a routine which populates a DataGridView. I generate the data on the fly in arrays and the populate the datagridview simply by saying
For each Row in DataGridView1.Rows
DataGridView1.Rows(row.index).Cells("PastColumn) = Array(row.index)
Next
I am not saving the data to log files. I only display the results at the end of my routine. When I close the project the data is lost.I am trying to understand why one would bind data. Would you do this in the case where you are saving the data to a file and you want the datagridview to update when the file is updated or loaded again at another time?
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Mar 2, 2011
I am reading data from an API feed and saving the chunks into files. When the files reach 2 MB I start a new file and write to that file. What happens now is that an entry (<entry></entry>) can get cut off at the end of a file and continues into the new file. I try and reconstruct the files by taking the last entry and combining it with the first entry of the next file but this is tedious handling the data transmission and file creation.
Do
timestamp = DateTime.Now
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
If numbytesread > 123 Then
'timestamp = DateTime.Now
responseData = Encoding.UTF8.GetString
[Code] .....
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Sep 29, 2010
I wish to save some data but dont want to use database. I have studies that XML files can be used for that. But I have no idea abut XML.
What is the difference between using XML and database?
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Oct 14, 2010
i have found some info on this but nothing i can use... im using vb.net to automate excel before i print the excel worksheet i need to change the printers setting to use the manual feed tray instead of the auto feed
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Mar 9, 2009
rewriting a class I use for saving Treeview data to a XML file for use of saving ListView data I can't really figure out the rewrite, I'm stucked, unfortunately Listviews seems to be a big problem for me in general.
Option Strict On
''' <summary>
''' The TreeViewDataAccess class allows the nodes within a TreeView to be
''' persisted to xml for later retrevial.
''' </summary>
[Code]....
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Dec 2, 2010
i am using a textbox to feed data into a listbox. i want it to split the data into seperate words and place them as items into the listbox. (split by the spaces)
[Code]...
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Sep 10, 2010
This is a follow on from my previous thread in which .[URL]
in brief i have the following XML string which contains many hundered users, i have shortened it for posting
<?xml version="1.0" encoding="utf-8" ?>
<string xmlns="http://tempuri.org/">
<users>
[Code]....
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Nov 8, 2011
I am trying to figure something out. I have an application in which I am adding the ability to consume a feed. I have no problem with the feed itself, but my problem is how can I mark certain items as 'read'? The only thing I can thing of is to read the feed into a database. In this database, I add a column for 'read' which I update when the user has read the article. Then each time I retrieve the feed, I compare the feed to the database and only load new items into the database.
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Mar 9, 2012
I have multiple file upload boxes on a form in my mvc3 application. Request.Files shows 3 files when I put a break point in the below function and look at it.. Problem is other than coding a counter and using a select case I dont see a way to handle saving each file name to the database column it belongs to... Is there away to assign the variable on the fly I guess you could say So that the foreach loop would drop the file in the correct column. Ie handoutFile1, handoutFile2 , handoutFile3, Etc. As it stands the below will overwrite the filename in handoutfile1 every time the loop is gone through. I thought about throwing a counter in the loop and just put a select case on it to assign the db column based on the counter number. Seems like a cheap work around though. [Code]
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Feb 12, 2012
Currently I am saving data from my applications by saving a text file via a stream reader as a string. I have come to a problem. In my current application, I have an array of the following structure:
[Code]...
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Dec 18, 2010
The drive is connected via USB and the problem I'm having is that, periodically, while my code is executing, the usb drive seems to disconnect and reconnect. (Nothing to do with the program, but the drive itself).I want to find a way to prevent these temporary drive reconnects from interrupting my code. IE, i want to insure that whatever read or write that is requested is actually executed even in the case of a temporary drive interruption.
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Feb 23, 2012
When I load data from xml to my dataset I want to apply this changes to database. This is my code, so far unsuccessful. [code]
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Nov 1, 2011
How to save colors to Access Data Base and read them after?
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Mar 24, 2012
i have 2 problems the first problem is if i have a .txt file how can i extract specific data. the second problem can i create batch files on the fly because of the need for a variable again it may not make sense but shout tyrannically
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Jan 17, 2011
Lets say you have a few text boxes, I know how to save the information in each box to a text file, but that creates a file for each box. Is it possible to save the contence of lots of different text boxes to 1 text file, and then when loading them it would load it all back to the right places?
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May 7, 2010
i can anyone tell me how do i save the below codes into textfile and make my program read from it? i'm trying to make a chinese calendar and below are the months of it. i'm gonna need to save up to about 3 years of months.
[Code]...
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Feb 16, 2010
I need to save some string settings at runtime and read them back. They will need to be changed at anytime during runtime also. The examples I have found says they are obsolete for vs2008. how to save and read some string settings? I found alot for the application settings that to me are ones you set once for the app like in an asp.net site. I need to change these anytime like you would in a registry.
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May 4, 2009
I'm new to VB and trying to figure out how I can replace a bit of descriptive text in a binary file. I presume its binary as I cant open it with anything but a hex editor. I've changed the text (file description) in the hex editor and saved it fine but I'm unsure how I go about saving just the section of information I need. I can work out the saving bit later.In the attached file you'll see the highlighted bit I want to edit. I need to replace the whole line or the file corrupt but I can fill it up with null characters and the numbers are just
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Aug 18, 2011
I am trying to create a console application that allows me to read the contents of a text file and saving the data by specific name in a set of files. For example, the text file I am going to read is a tab delimited file. Some content of the file includes full name, school, location, and whatnot. I want to save the content by school name in a set of files that have the school names. In this case, everyone that attends "Central" will be saved in a file named Central.txt.Everyone that attends "Central Park" will be saved in a file named Central Park.txt.These are the sub procedures I came up with so far:
Readfile()
'Use StreamReader
WriteFile()
And I think I am on the right track of reading the text file:
Dim objStreamReader As StreamReader
Dim strLine As String
'Pass the file path and the file name to the StreamReader constructor.
[code]....
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Sep 19, 2010
I need to control a device with a GPIB port. I have the commands that I need to use to do this; but I don't know which is the sintaxis in Visual Basic.
For example if I need to send a instruction like "START:0.01" to the external device which are the libraries that I have to include?, how should I write the programming line to do this?
The main tasks that I need to program are sending data, receiving data, and saving data
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Jun 9, 2010
im moving over from vb6 to vb.net i used the code alot in vb6 to save infomation to a ini file but when i try to use it in vb.net
[Code]....
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Feb 23, 2010
I have a slight problem understanding how the following code works, it's specified in an example I have that the code is to check if FileName is a valid path for a text file and other things of course but I'm just interested in that part(checking it's a valid path). Here's the code:
Method save()
aWriter As StreamWriter
Try
[code].....
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Jul 22, 2010
I need to have so way of saving in to a zip file.
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May 18, 2010
We have to learn VB.NET for the semester, my experience lies mainly with C# - not that this should make a difference to this particular problem. I've used just about the most simple way to save a file using the .NET framework, but Windows 7 won't let me save the file anywhere (or anywhere that I have found yet). Here is the code I am using to save a text file.
[Code]...
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Jul 11, 2010
is there any VB.Net existing saving function?
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