Read Header Row Of Remote File?
May 2, 2009
I am trying to open a remote file to read the header row to establish which columns the file has. The code below works but takes ages with a large file. I have a feeling the whole files contents is being read into memory?Is it possible to read a header row of a remote file without reading the whole file into memory? the files I want to peek at will have 500K + rows so I need a quick and efficien
Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnUpload.Click
[code].....
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Jun 7, 2009
how do i read / write to a remote xml file with vb.net?
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Feb 12, 2012
I am trying to read the "FrameSize" from the header of a SWF file. I know it starts from the 9th byte and that it is 9 bytes long. I am getting stuck on the next part though... What I now need to do is read the first 5 bits of the FrameSize ByteArray in order to determine how many bits make up the remaining 4 sections of the tag. Then I need to read each of those sections to get the data I need.
I've been googling for ages and trying different things, but I am still clueless on howto grab the first 5 bits and turn them into a usable value that I can then use to navigate the remaining bits.
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Jan 27, 2012
I am trying to Read BMP that not Have the Header of BMP and Trying to Read it with BMP Constructor, File is used for interface in a game, File structure is:The File structure is like this (Offset in decimal): [code]
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Jul 3, 2009
I want to know how to read tiff image header information using vb.net or C#.
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Jan 9, 2012
How to change the font color of the column header text in my datagridview if the entire column is read-only. I basically use a loop to add columns to my datagridview and then set the properties of the columns. But for some reason setting the DefaultCellStyle.ForeColor and HeaderCell.Style.ForeColor properties does not work. The header text is still black.[code]...
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Aug 25, 2011
I use an OLEDB connection to read from an excel database, and this loop to read in all of the data from each of the columns
While reader.Read()
For i As Integer = 0 To reader.FieldCount - 1
temp = reader(i).ToString + ControlChars.Tab
output_file.Write(temp)
[code]....
Some of the columns contain date information, which are read in fine (usually as a string "2/20/2011" or so), but the headers of those columns are read in as a blank "". The headers for all the other columns read in fine, but not for the date containing columns.
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Oct 14, 2002
I am having trouble reading the event log on another machine. From what I can gather the .geteventlogs("server01") method should return the logs from the computer named "server01" but it doesn't work for me. It returns the results from the local machine instead.
[Code]...
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Jul 27, 2011
I created an in house tool in VB.net to complete my post installation steps of SQL Servers.
My tool completes all post installation steps like (Creating Database,storedporcedures,logins,logon trigger, database mail configuration, Jobs , local security policies and creating required folders and granting permissions to service account.)
[code]...
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Feb 22, 2009
I'm trying to read the source code of a remote .xml web page.
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Apr 4, 2008
I need to read the value of one subkey located under a list of 17,000 keys in windows registry. I have no problem doing it locally but cannot get the system.management name space to do the same remotely. I know MSDN documents the system.management name space but much more knowledge is assumed than in other areas I have used. Assume no problems with connection and authentication.[code]....
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Sep 24, 2009
Is there a way to access the field header name of a databound repeater within the header template. So insted of this....
<HeaderTemplate>
<table >
<th ></th>
<th >Forename</th>
[code]....
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Mar 11, 2011
I'm going through All-In-One Code Framework Coding Standards document and one of the recommendations is to add a file header comment at the start of every human-created code file. This is the first time I've seen such a recommendation and to me it's just an unnecessary and ugly clutter but I'm wondering if someone could explain why M$ recommends this?
[Code]...
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Oct 21, 2009
I'm using the following code to populate a DataGridView with a worksheet. This is working fine, however, I'm unsure how I can get the Text from the page header. (not to be confused with the column header). Later in my code when I am exporting into an existing workbook with a new worksheet, I'm wanting to use the header text as the tab name. The header text being "September 2009" so that when I import/manipulate/export october, the new tab will be "October 2009" etc. [Code]
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Mar 11, 2010
I have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
6400,3200,2,95.5,84,76.6,0
1,2,-20,15,0,0,0,"NO",0,0
TOTAL GPM= 6400 HWT= 95.5 CWT= 84.0 IWBT= 76.6 ALTITUDE= 0
CODE]...
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Oct 23, 2011
however, I am stuck at BinaryReader.actually this is what i am trying to acheive through VB.NET.say for the following file type :
JPG file = FF D8 FF E0
BMP file = 42 4D BE 4E
PNG file = 89 50 4E 47
GIF file = 47 49 46 38
the above are the 4-byte headers in Hex(raw) I need to read these headers of any given file using OpenFileDialog using Button1_click event,on selection of any given file(*.* filters ON)it should use the BinaryReader and look for only 4-bytes starting from offset 0, and it should not go to EOF marker (-1).and have a variable to hold this 4-byte header value, to run this in a database table which will check the same header value in the table and would display the corresponding extension of the file. from the table.
I can do this using case, if then...etc.however, I have to do it using Database and also i need to check for testing purpose to use MsgBox() to display this variable which is holding the 4-byte header.however, the MsgBox doesnt allow anything other than String.
PS: I tried studying the methods like:
FileOpen/Seek/Peek/ReadBytes().
but still not sure how to get them work.
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May 3, 2012
in my application i created table called houseloading which has field called housename.which is inserted into the sqlserver database. my table will look like this
///column name house
values red
green
what i want now is i want to display the values red green as column header in datagridview
which will look exactly like this
red green
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Dec 27, 2009
What is the simplest way to use a C++ header file in a VB.NET application?I need to access an API defined via the header file for a custom VB.NET windows app.
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May 3, 2011
I have a csv file generated with headings on the first row and data on the rest. The file varies each time and I have to have all these values for further usage. I'm using File.ReadAllLines(path) but could ignore the header row.
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Nov 22, 2011
I have a SSIS package to read CSV file and generate a Flat file. In the CSV file, first line is having the column names. I have to verify whether column names are in order, if not i have to produce a error. I have to use a script task for this one. I read the first line using readline method and split the line with commas, the problem is the file having a multiple line column names, means column names include new line character also. So how to get the column names from the header?
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Mar 18, 2010
I have been working off and on for a year on my own media browser that I created in VB.NET. My program will play MP3 playlists as well as supporting drag and drop
Getting fileinfo of an mp3 is no problem but I have discovered that it is more complex when I try to get file duration of video files (.avi,.mpg) etc.
My code listed below uses a timer. In order for me to get a video duration value, I must actually play the file in axwindowsmediaplayer1 for one second. This seems not practical.
I have seen many examples on the internet in C# that read video metadata without need to play/load the file. Why are there no examples in vb.net of this? Is it too difficult to achieve in vb.net?[code]...
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Nov 16, 2010
Just recently got into experimenting with NLog, and it occurs to me that I would like to be able to add header information to the top a log file such as:
Executable name
File version
Release Date
Windows User ID
etc...
After some searching I have been unable to find anything in the existing on-line documentation or code forums which indicates this type of functionality. Is this possible? I have always previously included this sort of information in log files, and have found it useful on numerous occsions in the past, when sourcing information on production issues at customer sites. Admittedly, this functionality was custom built for the solutions and not based on any of the current .NET logging frameworks.
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Nov 19, 2008
I'm using vb express 08 and I'm writing a program that requires the name of (and possibly location) as the form header as well as the name of the program itself.
for example; when you open MS Word, the title displayed at the top is [file name] - Microsoft Word
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Mar 6, 2010
I'm wondering how I can go about creating something like a header file to contain some verbose functions I don't want to have to look at after I get them created. Something like in c++ like..
#include "classfunctions.h" to hide all the nasty stuff you don't want anyone to see.
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Feb 12, 2011
For my project, I need to develop an app, which will have MS-SQL db with 4 tables
a>FileHeader
b>FileFooter
c>Extension
d>Detail about the file.
This is all to do with the Magic Numbers, or File header and footer, found in all files. The first 4-byte and last 4-bytes.
Example:
Suppose a word DOC file when read using this app should return and match the values
D0 CF 11 E0
So, how can I read the files using vb.net, fileIO, FileStream/StreamClass/FileReader? I just need to open the file and read the first 4 and last 4 bytes of any given file. And then it should connect back to the SQL database and lookup for the matching values from the tables as I had mentioned. And return a match found or not found.
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Mar 4, 2012
able to give me a script that i will be able to grab a file version of an specific file from multiple remote machines. I have a list of machines in Txt file ... i want the script to read the list.. and generate a new file that have the Machine names with File version.
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Mar 21, 2011
I have to read in several thousand lines of a EDI 4010 or 5010 formatted file into a database. This is medical claims data. In my current process I read each row of the file and parse it into a string array. I then assign each value of the array to a string variable and when I detect a new claim header or detail record I write the variables to the SQL server in a SQL insert statement. Example below
[Code]...
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Apr 21, 2012
The below code imports my CSV file into the data grid. Only issue is it populates the header with a row from the CSV file, I want the header to be left blank and rows to be imported after it.[code]
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Aug 14, 2009
I am developing an Application in VB.Net 2.0. I have a module which would copy files from the Local Machine to a shared folder on remote machine. This shared folder on the remote machine is an authenticated folder. So, after searching on the Internet I found the following piece of code.[code]Another point to note is that when I connect to the File Share using Windows Explorer and then try to execute the application, it works properly.I am not sure why I am getting the error when I do not connect to the Shared Folder using Windows Explorer.Do I have to set some property so that the Credentials passed in the authentication are used.I also checked some posts that suggested setting up Mapped Drive to the Shared Folder on the Local machine and then to copy the file using IO.File.Copy function. However, I cannot use this as this Remote Folder should be only accessed through the application and not in any other case by the User. The users will not even have the credentials to this remote Server as it will be configured by the admin.So, Is there any way in which I can set this up and transfer the files from local machine to a remote shared folder?
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Jul 3, 2011
I have a weird requirement to parse a file which is a comma separated string with repeating header..i have a file which i load into database and this gets populated as a single column string with header and details data:something like this (This is single COLUMN String in a table). SSIS is not able to handle this so i am trying to know..If it is possible using writhing VB.Net custom component.[code]Also, if i can pass the values of header (i.e. header3, header5, header7 and header10) as a variable would be ideal.
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