Do A XML Transform Using XSLCompiledTransform From A Stream Instead Of An XML File On Disk
May 19, 2009
I'm using XamlWriter, XML Transform (with XSLCompiledTransform), and XamlReader to create deep copies of a user control with multiple user controls and lots of inheritance.
I have it working and am using it in my Print and Print Preview logic. The problem is that it's SLOW and I need to speed it up. Currently when the user selects Print Preview it takes about three seconds for the view to display. I need to reduce this to less than one second!
[Code]...
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Aug 3, 2010
I am grabbing some XML from an API and I want to tranform it before I put it into my dataset. I can't quite piece it together. I am trying to work from the examples in the documentation, but all I find are examples with reading and writing to the filesystem and I am not interested in storing things in the filesystem for this.
I am trying to piece together (1) xmlReader.create(URL) -> (2) xslcompiledtransform(xmlreader,xmlwriter) -> (3) get xmlwriter it into an xmlreader -> (4)dataset.readxml(xmlreader).
I can't figure how to do (2) and (3). How do I initialize the xmlwriter properly and feed it to an xmlreader?
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Mar 14, 2010
I have the following code that I need to migrate from VS 2003 (.Net 1.1) to VS 2008 (.Net 2+)but I get compilation error System.Xml.Xsl.Xsl Transform' is obsolete: This class has been deprecated.I probably need to use System.Xml.Xsl.XslCompiledTransform instead.but I do not find the matching Load() and Transform() overload versions that I can use with all the parameters of my original code.in MSDN [How to: Migrate Your XslTransform Code] I only found some simpler cases.url...but in my code I see some remarks that hints that the added parameters were used to avoid exceptions, so I prefer to use these parameters.[code]
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Mar 5, 2009
I wonder how to load transform an MS Excel file to a text file?
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Mar 29, 2012
The following gives me an error when I try to open an Excel file if the value of lblFileName is different than the file on disk by differences of upper or lowercase letters.
[code]...
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Jun 1, 2009
Given a filename, how do I efficiently search for that file on disk?
(Visual Studio 2005, i.e. .NET 2.0)
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Apr 12, 2012
Is there an easy way to copy a resource audio file to disk?
it is very easy for an image file (in two steps for clarity):
Dim a11 As Image = My.Resources.Speaker
a11.Save(Image_Path & "speaker.png")
All the examples on how to do this with an audio file seem to be very long winded and there are a lot of short audio files that I want to copy.
There must be an easier way in a few lines of code.
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Aug 1, 2008
Deleting a file is one of the controversial matters of computing. When a user deletes a file (removing it also from the Recycle Bin), they assume that the file is indeed deleted. However, what happens is that only the reference to that file is deleted, so the system can no longer remember where the file is located, but the file itself is very much intact.
I am looking for a way to delete a file permanently, the way e.g. the application Wipefile would do it, by applying successive overwrites (up to 30) over the actual position of the file on the disk. There must be a way to do this through code (I just presented an example that this has indeed been done ), so I'd like to know how to do it.
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Jul 7, 2011
I am trying to programitally download a file from a https server, that uses cookies (and hence I'm using httpwebrequest). I'm debug printing the capacity of the streams to check, but the output [raw] files look different. Have tried other encoding to no avail.
Code:
Sub downloadzip(strURL As String, strDestDir As String)
Dim request As HttpWebRequest
Dim response As HttpWebResponse
request = Net.HttpWebRequest.Create(strURL)
request.UserAgent = strUserAgent
[Code].....
So I get the right size file downloaded, but dotnetzip does not recognise it, and the files that get copied out are incomplete/invalid zips.
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May 22, 2011
I am trying to make a little app and I have a problem regarding embeded resources.I have added a dll file to my app resources and now I am trying to get that file back and write it to disk in a specific folder.
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May 22, 2011
I am trying to make a little app and I have a problem regarding embeded resources.
I have added a dll file to my app resources and now I am trying to get that file back and write it to disk in a specific folder.
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Apr 21, 2010
due to folder size limitation in Outlook/Exchange I must archive older mails on disk as *.msg files. So I am still able to search for <TEXT> in explorer.
I create the *.msg files by drag&drop a bunch of mails from the Outlook folder to the disk folder. Unfortunately the changed-at date displayed in explorer is the date of the file creation and not the sent-date as displayed in Outlook.
I know how to change the changed-at date using SetFileTime but I don't know how to extract the sent-date from the .msg file to use it.
My question is: how can I open (in VBA) a .msg file and extract the sent date of the mail?
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Oct 21, 2010
My application uses structures that contain strings and arrays that I want to write to disk. I understand that I can create the fixed length data types in the structures by using "ReDim" and "String$", but my question is: Does VB reallocate the storage for the structure which includes these redimensioned members in-line (which would be necessary in order to write the contents to disk), or does it allocate heap and merely store a pointer in the structure?If only a pointer is provided, is there a straightforward workaround to allow me to create fixed length data types in a structure that could be written to a disk file?Or, Is there an I/O method that will handle the situation by recreating a contiguous buffer containing the structure before writing it to disk?
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Dec 23, 2010
After I ran a disk-cleanup (in my case AVG PC-TuneUp), the loading of my VB.net project gave error on a missing file.Changing the build-configuration (DEBUG->RELEASE->DEBUG) would recreate the file and all is OK. But I have basic configuration-info for the build, maybe in more complex cases some important details could be lost when the file gets deleted.I would think an information as critical as that, would be placed in the project folder, or be part of one of the many files that make up the project, but not in the temp-folder.
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May 25, 2012
in an winForm app in VS2010 win 7 compiling to x86, I try to do what Alvas.Audio seems to work. See (c# ex: [URL] for reference.
Dim data() As Byte = wr.ReadData(second * i, second)
The result give me data.length()=0. I do not have any exception, I can read format from it and whatever reader I use I got this problem.EDIT : After some tests, it seems like the uncompressed file I create in the first step (in PCM format, with .wav extension) can not be recognized by the Alvas.audio library for the second step. I must miss something around Audio file markups or something alike.
Here is the code that might be the source (basically this is step 1):
Dim functOut As String = String.Empty
Dim wr As Alvas.Audio.IAudioReader = Nothing
Dim fs As IO.FileStream = Nothing
[code]....
How can I write the resulted stream to be sure I can read it again later?
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Jul 1, 2011
I'm developing a winform application. I want to take input from user (i.e. the user provides username) and use that input as part of filename and save to file.How do I check if the username provided by the user didn't contain windows' reserved characters. And what is the list of reserved characters for windows?
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Oct 8, 2009
I am using BinaryWriter class to write a binary file to disk. When I invoke the Write method, passing an unsigned short value, it writes it in little-endian format. For example:
bw.Write(0xA000);
writes the value in the binary file as 0x00 0xA0. Is there a way to make BInaryWriter use Big Endian? If not, is it possible to create a new class, inheriting BinaryWriter and overload the Write function to make it write big endian?
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Aug 29, 2010
I have a mySQL table(IMP_SCANS) holding the file, it's name and size for every document:
scan_1 blob
description varchar
filesize int
doc_no varchar
doc_date date
I managed to insert a file to the table. Now I need to save the file to disk.
So I have the code:
Dim conn As New MySqlConnection
Dim cmd As New MySqlCommand
Dim myData As MySqlDataReader
Dim SQL As String
Dim FileSize As UInt32
Dim fs As FileStream
[CODE]............
I all works fine up to the line: myData.GetBytes(myData.GetOrdinal("scan_1"), 0, rawData, 0, filesize) Where it says "Object reference not set to an instance of an object". I cannot figure out why I receive this error.
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Jul 11, 2009
I ve a file in my computer.......
i want to knw the locetion of my file in the disk drive.....
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May 31, 2011
I don't know whether it is simple or not because i am new to programming. my requirement is : In my vb.net winform application, the filenames of the files present in "D:Project" willbe displayed in DataGridView1 control. Now I want to load these files one after another into memory stream buffer and add the headers("ID","Name","Class") to the content in the file. Then I want to save these files in "C:" with "_de" as suufix to the filename i.e.,sample_de.csv.
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Feb 9, 2009
I am writing a backup program that zips files. Using some sample code I have the following that creates a zip file. Problem is it does not get any subdirectories or files. Where am i going wrong?
Dim azFileNames() As String = Directory.GetFiles(SourceFolder)
Dim objCrc32 As New Crc32()
Dim zipStream As ZipOutputStream
[CODE]...
Alternativley, there is another component to the zipping dll that I could probably bypass the above altogether. It is: FZ.CreateZip(DestFile, SourceFolder, True, "", "") Where DestFile is (Output stream as system.io.stream). I'm trying to read all the files, directories, sub dir and files, etc from a specific location, let's say 'My Documents' into Destfile in which the FZ.CreateZip zips the file. FZ is FastZip which is from icsharpcode.net. They have c# examples, but that's greek to me. I'm trying to just learn VB!
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Jun 9, 2010
If i use a stream to modify few bytes in a file without changing the total number of bytes
does the stream rewrite all the file even if just few bytes have been replaced?
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Mar 10, 2010
Is there anyway to take a static stream reader, and switch it to another text file based on the user changing the file?
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Jun 21, 2010
i would like to ask is there anyway to read a txt file with UTF-8 encoding using streamreader or filestream. the txt file is contain some extended ASCII that makes me cannot read the characters properly. I hav tried Encoding.ASCII.GetString(Encoding.UTF8.GetBytes()) but still it return wrong character when it's reading extended ASCII code.
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Jun 5, 2011
I have a program that must copy a file to 3 locations, the local hard disk, a USB drive, and a network location. I have the file (about 70mb) loaded into a byte array. My quesion is, since I'm not actively modifying the byte array, can I impliment a form of multithreading where all 3 threads read the same byte array at the same time?
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Dec 14, 2010
Im trying to read A .CSV file into the database.Every time at exactly 100 records the code seems to stop executing.Strange thing is, that when I step through the code manually, the code DOES run to the end...and a total of 403 records are imported.So NO errors are thrown, and no weird data is present in the row at which the code stops running (which makes sense, since the code is all executed when stepped through manually)[code]
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Nov 18, 2011
I am using Visual Basic 2010 Express and attempting to get information on how to Open, Close, Read and Write a disk file in Windows using VB. I have attempted to use help on the home page of Visual Basic 2010 Express with no results. It does not give me any instruction or sample.
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May 5, 2011
Im making a desktop player for a online web radio, and for the program I wanna make it show all the stream info. Like the stream name, and such. However I dont know how to do this? I looked everywhere
The server url is setup like this "[URL]" And it has all the stream info and that there. So is there a way I can get the info from there onto like say a label? Live updates btw.
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May 29, 2011
i am making a game in which the file stream gets a certain file(lets say a.txt) and it reads it, if it has certain values stored in the file it returns boolean(this is a function), then a sub procedure writes to the file using a streamwriter and a filestream using the same file. I am having problems, sometimes visual basic says that another process is using the file, this is before i closed the filestreams and the streamwriter or streamreader, then it gives me errors when i close the files, it tells me that it can't access a file that is already closed, i thought the filestream gets the file and lets the streamreader or streamwriter read or write to the filefound out the problem?
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May 30, 2009
is it possible to report the percentage of file written by a file stream wile it is writing a large file?I am using a code like this one to write a large file
Using Fs As System.IO.FileStream = System.IO.File.Create(FolderPath)
Dim bf As New BinaryFormatter()
bf.Serialize(Fs, data)
End Using
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