FileSystemWatcher And Save Excel Files
Aug 21, 2011
I am trying to write an app that monitora a folder, and subfolders, amd makes a copy of any file that gets saved there, (or renamed, moved etc). Filesystemwatcher does a pretty good job of it, untili someone saves an Excel spreadsheet. Excel does about 9 different file system operations just to save the file. What happens is I get events for tempo files being saved, then renamed, or deleted in a very quick succession. All I want is the final spreadsheet, but these changes happen so quickly is causes my app to crash. Anybiody have any thoughts on how to hendle this?
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Feb 25, 2012
RichTextBox recording a name, surname, telephone number and address in the Excel spreadsheet, where the name is repeated every 5-th line in the RichTextBox, the same name each of the 5-line phone every 5-th line, address each of the 5-line.
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Sep 13, 2010
I am in the process of writing a windows service that will be replacing a vbscript that runs via a scheduled task currently. It currently runs on 350 kiosk machines in 350 different locations.Here is what the vbscript currently does:
1. The machine receives a ZIP file in the RECEIVE directory. Configuration_09122010_1234.zip. This file contains software configuration files that need to be copied to specified folders on the machine and to another machine on the local LAN where this kiosk is located.
2. The zip file is extracted to a folder with the same name as the zip file.Inside the zip file is an instruction file (.txt) and files that are referenced in the instruction file.
3. Opens the instruction file and performs the instructions in the file. Example: (this would copy pricingfile1.dbf to \mymachinecapplication1pricing, and then execute softwaresoftwarepatch1.exe which is located in \mymachinecpatches)
pricingfile1.dbf, \mymachinecapplication1pricing, copy
softwarepatch1.exe, \mymachinecpatches, run
4. Once all of the actions in the instructions file are completed, the folder where the zip file was extracted is deleted and the zip file is renamed to configuration_09122010_1234.zip.applied to show that it was processed by the script. Also, because the script is a scheduled task, this ensures that the file is not applied more than 1 time.
So I have started writing the service using the FileSystemWatcher. Basically I look in the receive folder for any file that looks like Configuration_MMddyyyy_*.zip and unzip it to a folder of the same name.
1. I have been doing some reading about the FileSystemWatcher Created event.I read an article about how the Created event fires as soon as the first byte is written but doesn't necessarily mean that the complete file has arrived at the machine. A post I read involved a .csv file and it mentioned that you try to open the file and catch any errors - if you cannot open the file, it hasn't arrived yet. This makes sense to me but I don't know what the equivalent would be to a zip file. It's not the same as opening a txt or csv file.
2. There are times that we send more than 1 configuration file in the same day, or even, at the same time. Above I mentioned the name was Configuration_<date>_1234.zip. The 1234 is a sequence number, always incremented. The idea is for 1234 to be applied before 1235 and 1236. So if I had 2 files sent *at the same time* and I want them to apply in order, how would I do this? I thought about when I am applying 1 file to stop looking for changes until after the apply process is completed, but then I *think* I would miss any file that arrived while I EnableRaisingEvents = false?
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Apr 13, 2012
I have a filesystemwatcher waiting for .jpg files to arrive from the camera.he file system watcher invokes a delegate (it works but is that the proper way to handle it?) sub that does a couple of things:1. Adds the just arrived file name to a table2. Attempts to display the image in a picturebox on the form. When it displays the image it imprints some information on the image that the user has entered on the screen. I use a file stream to retrieve the image.The problem is, I'm getting a file in use orror on the "Img = ystem.Drawing.Image.FromStream(fs)"statement. Not all the time. Sometimes I can add three or four files to the folder in rapid succession with no issue. But then out of the blue the error will occur. Sometimes it's there to stay but other times it will go away and allow me to add morefiles.
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May 29, 2011
ive just finished writing a file in VB 2010 and im using filesystemwatcher but ive found a problem whereas the filesystemwatcher fires the target twice everytime there is a change to the file.
ive looked around and found it to be a problem but cant seem to find a cure
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Jun 11, 2011
How do you set the FileSystemWatcher.Filter to check only two files.
Here's my code that doesn't even work.
watcher.Filter = "*.txt|*.ini"
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Jun 1, 2009
I have a Windows service that is watching a folder for files that will be placed there.(Created in Visual Studio 2005.)The files each represent a transaction, and the transactions have to be kept in order.As I process each file (transaction), I want to forward it to someone else.(The someone else wants them kept in order.)It looks like I can't paste multiple files into a folder simultaneously and still be sure that they will be processed in the order of the original date and time they were created.Nor can I be sure that they would be read in name order.(FileSystemWatcher would grab them in any old order it chose.)So I think I will have to move the files into the folder one at a time, in the proper sequence.But I'm wondering if I could get into a "racing" situation.
When FileSystemWatcher detects a file in a folder, it creates a new thread for your event handler to operate on.If it detects a second file while still processing the first file, would it then create yet another thread?If that is the case, then if File1.xml takes longer to process than File2.xml, it seems like File2.xml might finish first, resulting in my transactions getting out of order.In my own experiments,I have not seen evidence that multiple files are really processed simultaneously.I write messages to a log file as I process each transaction, and I never see messages from File1.xml's processing intermingled with File2.xml's messages.This seems to be true even when I paste both files into the folder simultaneously.it only keeps one event-handling thread going at a time, and queues up the events as they come, processing them on that single thread.Otherwise, I'll have to do something to ensure they are kept in order.
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Apr 15, 2011
Can i monitor changes to the registry like monitoring the files and folders using filesystemwatcher?
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Aug 18, 2011
I'm trying to copy multiple excel source files into one excel file. My current code is working only for 3 source files..If more than 3 files are there, it doesn't copy the data but creates blank work sheet in the output excel file. Lets say I have a source folder with 5 excel files. Each workbook contains one worksheet with data. It copies upto 3 worksheets along with data into output excel file.
Lets say excel1 contains A as work sheet, excel2 contains B as work sheet ,excel3 contains C as work sheet ,excel4 contains D as work sheet ,excel5 contains E as work sheet .Now my output excel file should look like..OutputExcel with A, B, C, D, E along with respective data.But my current code is giving output as A,B,C worksheets along with respective data but its creating blank sheet1,sheet2 in place of D & E.
SSIS Script Task Vb.Net Code:
Public
Sub Main()
Dim filePath
As
String =
[code].....
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Mar 22, 2011
im used to C programming.
Private Sub SaveAsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveAsToolStripMenuItem.Click
timedate.Stop()[code]......
The problem is that if I save a file I get "myfile.GDL" if I overwrite that I get a new file "myfile.GDL.GDL" ect.the other problem being that the filtering in the windows save/open dialog wont show .GDL files unless I select "all files".
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Jan 10, 2012
I'm trying to export a datagridview to Excel and open the Excel spreadsheet (not SAVE the worksheet).
Public Sub ExcelRpt(ByVal DgvName As GridView, ByVal url As String)
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
[code]....
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Jan 28, 2010
i'm trying to save an excel file after I open my excel application. This is what I have so far:
'Opens the report
xlPeakDemand.Visible = True
xlPeakDemandWorkbook.SaveAs("C:Documents and
[Code].....
When saving as an xls it works fine but when saving as a htm its a disaster Just a bunch or symbols and stuff. BUT if I go into my xls document and Save As webpage from there, it works fine!
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Oct 23, 2009
The following code works fine but seems to leave instances of excel.exe running in the background. How do I go about closing out this sub properly?
Private Sub ReadExcel(ByVal childform As Fone_Builder_Delux.frmData, ByVal FileName As String)
' In progress
childform.sampleloaded = False
[code]....
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Feb 12, 2012
[URL]..a good way to create Excel files without using Ms Excel,but this is C# source code,I used [URL]..to convert from C# to VB.NET,but after conversion There are some strange errors :
Error21Too many characters in character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1625XLSExportDemo
Error22Empty character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1633XLSExportDemo
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May 2, 2009
I am trying to save multiple text files using a save dialog.
I can save one textbox
SaveFileDialog1.ShowDialog()
Dim File As System.IO.File
Dim Write As System.IO.StreamWriter
Write = File.CreateText(SaveFileDialog1.FileName)
Write.WriteLine(TextBox1.Text)
Write.Close()
but I don't know how to save multiple textboxes and richtext boxes. Would I have to use a screenwriter for this?
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Jun 20, 2010
which are the control used to display word files and excel sheets inside vb.net forms ? (i have already added reference lib.)
Platform: Vb.net (framework : 3.5)
language : visual basic
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Aug 23, 2011
I am trying to import a bunch of excel 2003 files all with A:H columns and they are under the same headings etc. into a table in access 2003 database. This is a module in access im making. Im using a file search to look for every file that begins with Format (which they all do ) to get at all the files in the folder path. is there a more efficient way to do this? somehow select all files in a folder? and import each to the same table in access? The DoCmd.TransferSpreadsheet seeems to take each file path individually so I'm not sure how to get each file name in the folder to import it.
I have this at the moment:
Sub Import()
Dim db As Database
Set db = CurrentDb
[Code].....
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Mar 14, 2011
I want to develop an application which can Write, Save, Read text files(or html files) What I want the application to do is. When I open my application I can write stuffs and then it will save it to my hosting/server. Then, the application will read the text which I already save.. So far, I can only make the application read it by using WebBrowser control and navigating it to a specified URL. Example: [URL](or message.txt) Which I modified from the website not from the application. I want to modify the text or html files from my application.
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Nov 9, 2010
I can do this using VBA, but I want to be able to create the code using a compiled VB programme, which can then be opened in Excel.
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May 8, 2010
I am trying to find a way to allow my users to choose the directory to save files into, THe file name is automatically generated as it has a naming convention and i am able to pre program a location to save to but i d like to be able to allow my users to decide themselves which directory they want to save the files to and to have the ability to choose which directory to save to
[Code]...
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Jan 31, 2012
I am using the Microsoft.Office.Interop.Excel library in an ASP.NET application, and I have populated a Worksheet in a Workbook. I want the user to be prompted to Save the document to their machine, but I cannot find a way to do it (myWorkbook.SaveAs(...) doesn't work).
[Code]...
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Apr 5, 2012
The Current Setup:So, I can use the following code to save a file as an XLS:
_myWorkbook.SaveAs("FileName.xls", Excel.XlFileFormat.xlWorkbookNormal)
I can also use the following code to save a file as an XLSX (Since I use Office 2010):
_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlWorkbookDefault)
I have tried (unsuccessfully) to save the file as an XLSX using the following code:
_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlExcel12)Why does this not work? Last I checked, Excel 12 was Excel 2007 (a version that supports XLSX). Am I missing something?
I get a This extension can not be used with the selected file type error)
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Dec 29, 2009
I am trying to open an excel CSV file and overwrite some data, close then use that file in my program. Everything go is fine except when I read the data from the file, the file seems to be corrupted! [code]...
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Jul 22, 2011
I have a program where I put data into a list view in VB.net. I then use the code below in a button click to export the content into a excel file where I can then save it. however I plan to add alot more data to the list view ad would like to auto save the data in the list view to an excel file (where it saves it to disk not an open excel window) and then clears the list view then will repopulate the list view and repet the loop of saving the data to a new excel file on disk.[code]...
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Nov 11, 2011
I'm reading data from Excel and processing the file line by line.
If the process succeeds then I need to delete that row from Excel and save it. If it fails, then continue with the next line and so on.
Initially I used OLEDB to read data from Excel, but by using this I cannot delete rows.
I think we can solve this by using COM component.
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Mar 16, 2010
I am trying to save an object (Class1) as string in a cell value. My issue is that from time to time I have a ComException:HRESULT: 0x8007000E (E_OUTOFMEMORY)(It is kind of random but I have not identified any particular pattern yet) when I write the value into a cell. Any ideas will be welcome
For illustration purposes:
Let Class1 be the class to be converted to an Xml string. (Notice that I removed the xml declaration at the start of the string to avoid having the preamble present- non printable
[code]....
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Sep 20, 2011
How can I disable Save As button, I can open Ms Excel through vb net but the thing is I also want to disable the 'save as' as the Ms Excel Open.But not in Macro.. Here's my code:
Imports Excel = Microsoft.Office.Interop.Excel
Dim oXL As Excel.Application
Dim oWB As Excel.Workbook
[code].....
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Nov 27, 2010
how to open and save data in excel using vb2008.
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May 4, 2009
I'm new to vb.net. I cannot save data from datagrid to excel. I use inputbox so user can input data to datagrid. Then the user can click the button to save it to excel.
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Jun 8, 2012
[code]...
I want to create "FileName.xls" in "Excel 2007" with out changing the code I know that xlExcel.SaveAs("D:FileName",xlExcel8) code will Create "FileName.xls". Since I have more the 50 small application, in each application there are around 15 similar lines related to the above code (all are 6 to 7 Years old application).Is there any other methods (eg: Change in regedit ). so that output is "FileName.xls"
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