I need a reliable way to check if a file is "newer" than one of the same name on a different drive. If it's newer, it will get copied. I have tried something like this:
sElement and sDest are full pathnames to the relevant files If Date.Compare(File.GetLastWriteTime(sElement), File.GetLastWriteTime(sDest)) > 0 Then
' copy file Else Don't copy file Endif This nearly works, but I have a strange glitch with some jpegs. If I drag one from my c: drive to my y: drive (a NAS box) the "date modified" as displayed in Windows XP changes by 1 second. The date and the hours and minutes stay exactly the same (they are files from 2009), so it's not that the file is picking up the current date/time. Very strange ...
If there an easy way to compare date/times and get the difference in seconds? I can then assume a difference of 1 (or even a few) second(s) means the files are the same.
Now I like to ask you about (auto) updating application. I know how to check for newer version but I don't know how to download it (and replace the older one). I'm working with .exe files. [code] This is the code which I'm using to check for new version.
I am trying to download a file from an ftp site only if it's newer than my local fileate to check for the file properties? right now it downloads the file, but just need if newer. The purpose is to update a .mdb with the contents of the file, so don't want to download file and run an update everytime my app runs, only if the file is different. This is the code I am using:
Const localFile As String = "C:version.xml" Const remoteFile As String = "/version.xml" Const host As String = "ftp://1.1.1.1"
I'm using the WebClient class to download some exe's from servers, and everything works well, but I would like to only download the file if the one on the server is newer than the one on the local machine.
I'm working with VB Express 2008 and MS SQL Express 2008. I have an SQL database in my project which I manipulate in the project by adding to or subtracting from a particular table. The database's "Copy to Output Directory" property within the project is set to "Copy if Newer." Nevertheless, after I run the project, add to or otherwise manipulate the data, save changes to the database and then exit, the changes are not reflected in the table.
I have this code for the Drag&Drop feature of listbox1:[code]In the "Private Sub ListBox1_DragDrop" I want to add the fileextension check to see it the file will or not be added to the list. How do I do it?
I've been passed a solution that has a vb.Net 2.0 project that references to a .Net 3.5 library. The library compiles with out problem but the vb project does not. It complains of missing objects which are in the library which are correctly added in the imports. Also I see a yellow yield sign next to the reference library also when I add the reference it complains of the framework version difference. Any help is apritiated. Also I'm using VS10. Imported the projects with no errors. A colleague has this working on VS9.
i want to check if a file exists in the Application.StartupPath. I tried My.Computer.FileSystem.FileExists but that checks the whole computer doesn't it. ? How do i check if a file exists in a directory?
How would i check to see if a file exits on a website before attempting to download it?Also in my code ive enclosed the instructions in Do loop and if the file doesnt exist i want to skip the code and loop to the next file.
I was wondering if it would be possible to check the file size of a .exe on a website and see if it's greater than or less than the program running it?
I need my application to update as it is on multiple computers. Will the program update and work if I just replaced the files in the application startup folder with the files from the newer version's application startup folder?
I am having another issue with WMP in VB.NET 2010.I wrote an app using WMP in VB.NET 2010, using .NET Framework 4.0 of course, but had to change the framework target to 3.5. After doing this, the WMP component does not work. How, if I even can, fix this problem so that the program will run on .NET Framework 3.5? The error says that it could not load AxInterop.WMPLib.dll because it was built in a runtime newer than the currently loaded one.
I`m making a program.I`d like to know how to make a code which will navigate to my website and find if there's a newer version of my launcher..I`ll search some codes now, If I find some interesting codes i`ll post here so u can upgrade or tell me how to correctly use them for my auto-update.I cannot publish my Launcher unless I`ve an Auto-Update in my Launcher.
Im trying to make a program which would check for users from text file on a certain website I can populate the list box, and loop through it's items here is the code i came up with so far and it doesnt work properly, it pops out first item in the listbox, and last item only, even though that they shouldnt be popped out
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted If Not ListBox1.Items.Count < 2 Then
[code].....
(this is supposed to check every user, and if user doesnt exist, website will return page not found, else user exists and his name is added to listbox2)
I am developing a VB.NET application in which I use a DataGrid; I can't use the newer DataGridView due to version. But now when I try to compile this, I get the error:
[Code]...
What can I replace this line with? I have read on the internet that since my application should be web-based, I cannot use the Windows namespace. I think what I am asking for is a pretty simple solution, but I am a very new VB programmer. More of my code below.
Our program will start with the help of a FileSystemWatcher object. How can we check or the file is total copied, for example the file is 100 Mbyte it take a time it's ready for use. Idea:
Do While True Try N = testForUse(BigFile) If N = 1 Then Exit Do
I've gone through about 16 hours and two packs of cigarettes trying to figure this out. First a little background. I was using 6.0 up until 2004 when I went to prison. I'm out now, and trying to relearn the trade, using VS 2005. I'm currently porting some 6.0 code from another project, SpyCast Webcam Studio, into VB 8.0. It's disheartening, to say the least. None of the old built-in subs/functions work anymore, so I have to scour the forums to relearn each and every function.The section I'm doing now takes a snapshot from the webcam (Video API --> PictureBox --> Save as Jpeg), then upens the file to upload it to the server via HTTP POST. I've been using this code in SpyCast for years with no trouble, but I spent many hours trying to piece together the right code to open the binary file to read its contents. I pieced together two methods I found around the forums, one using FileStream() though the code I found wasn't for binary files, even though it said it was, so that code doesn't really work. Method two uses Microsoft.VisualBasic.FileOpen() and works better.
Here's the kicker. By the time I run through the rest of the rigamarole of uploading the file, by the time I read it on the webserver, it's *slightly* corrupted. It's a valid Jpeg, no errors, but the picture looks like when I use to watch the Playboy Channel when I was a kid scrambled with weird colors and whatnot. [code] Each "chunk" is basically one "line" of the file. It looks like a single LineInput() return is the text between two carriage returns. Am I correct? I tested this with a flat text file, and it looks true. However, That one input line returns the text or data with the carriage returns *stripped*! ***?!? =( Fine, I have no problem adding my own vbCrLf to each LineInput(), if I were opening text. but this's binary. A character could be Chr(10) or Chr(13), both of which are removed from the original file contents.So I could very well need to use something other than LineInput(), but I haven't found any other examples on the web using this method.
A user exported a excel file and he opened it.Some reason, he tried to export same exel file as same name.Then, the application is gone because it does not know what do with it.How do I check the excel file is opned or not when I try to export as same file name again?
How come software created in an older framework version won't run on a newer framework version? Actually whenever i try to run some old specific software having .net 3.5 framework on my PC they show they needs .net framwork 1.1 . What a bad thing?My newer version of Photoshop ans Ms office open all lower version files.
I got no clue how I can check the file size of some file. I would like to be able to determine the size of example. "C: estfile.txt". How can I do this in VB08?
I have a routine that uses windows compression to zip a file. It uses shell32. Rather than maintaining a five second timer for each file, I would like to check to see if the file is closed, not locked, etc., before moving on to the next step in my program. I've searched, and while I can try to open text files, zip files are not text files. I tried renaming the file, but it seems this is actually slowed while files are being added. [Code]
I'm in the process of nailing together a small program, the purpose of which is very simple: Monitor a number of various network locations for the existence of some files. when they spring into existence, check to see if someone is using the file and when it accessible, light up green and then I can go do what I need to do with it.[code]...
