Check The Folder To Search For The File, And If It's Not There, Go To The Next Step Without Throwing An Exception?
Apr 24, 2010
I'm doing a uni assignment and my application has to go to a specific folder and locate a file for data.The folder has 300+ files in it with a specific format for the naming of the files ie. the program goes to the folder looking for one specific file that has been derived from a different function and user input in the form.The program works fine when the file that it is searching for is there, but I keep getting a FileNotFoundException whenever the file that it's looking for is not there.I don't want the application to throw an exception every time the file doesn't exist because the program needs to return back to the loop to see if the next file is there or not.And so the loop continues until it's found all data and loaded it all into an array.How can I do a check of the folder to search for the file, and if it's not there, go to the next step without throwing an exception?
I've already added the unix2dos command in my environment path on the server.But when I execute the above mentioned command I get a FileNotFound exception even when the file is located on the disk.
catch an exception and then throw another exception? Like so:
Try ' Do operation xxx Catch ex As Exception ' Operation xxx failed, need to execute cleanup
[code]....
The reason for doing this is that while I catch my exception on a higher level logic (to make sure I can log it properly), I need to do some actions in the event of the exception that I can only do inside my class/function.
I thought at first that because during testing GetFormsByStatus() returns 0 results maybe that was causing problems, but it doesn't make sense that Except() wouldn't work if the provided list had 0 items.
Public Shared Function GetAvailableManufacturers() As List(Of Manufacturer) 'first get all the live orders and extract their mfrs' Dim sos As List(Of OrderForm) = GetFormsByStatus(StockStatus.Building) Dim unavailableMfrs As New List(Of Manufacturer)
[code]....
My idea to get available manufacturers was to get a list of all the manufacturers in my open forms, then get a list of all manufacturers and exclude all the manufacturers in the first list, illustrated like so (pseudo):
List A: {1,2,3,4,5,6,7,8,9,10} List B: {5,7,10} Result: {1,2,3,4,6,8,9}
I have set up my Manufacturer class according to this article so that it can be compared, but I'm still getting this error:
Unable to cast object of type '<ExceptIterator>d__92'1[csCore.Manufacturer]' to type 'System.Collections.Generic.List'1[csCore.Manufacturer]'.
I thought at first that because during testing GetFormsByStatus() returns 0 results maybe that was causing problems, but it doesn't make sense that Except() wouldn't work if the provided list had 0 items.
I have a problem with running CLR profiler. It throws an exception: See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
[code]...
I started out with a console application but half way I switched to windows form in the application properties. Does that have something to do with it? I do this because I don't want to show the console. My application takes about 57 miliseconds to run. Maybe it's too fast for the clr profiler ?
Imports Excel = Microsoft.Office.Interop.Excel Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
I am having a weird problem. IIf is messing up when I am working with an array. Apparently it is checking my else statement even though it isn't activated. Here is some code that demonstrates the issue:[code]
I am trying to get the type of a class by calling Type.GetType(), however it is throwing an null reference exception. I'm supplying the fully qualified name of the class as a string, I'm not sure what I am doing wrong. Here is what I am doing:Type.GetType("The.Name.Space.TheClassName")That is the fully qualified name of the class, it works fine for import statements.
I have written a small application perform CRUD operations on a Designations table. User search a Designation by Index and can make changes and the updates. I cannot see anything incorrect in my SQL and SQL works perfectly fine. Since i've created my Dataset using the desiner it automaticaly added the Optimistic concurrecy handling to the Dataset, therefore if an update fails it shold throw the DB conccurency exception.That's where the problem is, it doesnt throw the exception, application can retreive can update also fails to update on conccurency violation but when it happense it doesnt show the exception..... since code is long and have BLL and Presentations layers i've added a link you should be able downlaod the code + DB...
I have a class as below in VB.NET. The issue is class calling itself. So vb.NET throwing Stock Overflow exception. But the same class is working fine in VB6 version of code in VB6.How to resolve this issue?
I want to create a function for use on my ASP.NET 3.5 website that will step through a folder of image files one by one. Each filename found would be checked to see if it met certain conditions (this would involve making checks with the associated SQL Server database). If the file is okay, the function would just move on to the next file. If not, the file would be moved to another folder.I don't know how to define the list of files in a folder.
I'm using EPPlus 2.9.0.1 with Visual Basic.I have a DataTable with 35 Rows and 4 Columns and the code below:[code]When method 'LoadFromDataTable' is called, I get an ArgumentException (Negative row and Columns numbers are not allowed). I don't have negative numbers in row or column numbers, as far I know.
Private Sub FORNECEDORESBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FORNECEDORESBindingNavigatorSaveItem.Click[code]....
The idea is to detect if the cell of the first datagrid column is null and display the message. However, the code is not detecting the cell as null and the table adapter is throwing the OleDb exception.
Number of downloads: 81This program is supposed to calculate the ever popular mortgage payment and amortize the loan in a list box. I keep throwing this error "Missing Member Exception" and can not find out how to fix it anywhere. Because of the error I can't even see if I can even get a calculation in the text box, let alone if the amortization will run. The purple text is where the exception is.
Public Class HarlessSmithIA3
Dim LoanAmt, Int, Result, Term As Double Dim txtIntRate As New Object Dim txtLoanAmount As New Object Dim txtLoanTerm As New Object Dim txtMonthlyPayment As New Object
I have a folder that contains .txt, .pdf, etc files.I want to check if the folder contains a .txt file.If yes, I have to perform some action, if no, no action will be performed.I have this sample code to do the above, but with the know .txt file name.
Private Function DetermineIfFileExists() As Integer Dim sFileName As String sFileName = "C:/text1.txt" [code]....
In my case, I will not know the exact file name of the .txt file.I need to search for a .txt file.
Currently to check if a file is in use (before attempting to move or send it by FTP etc) we try and open it with exclusive right and trap the System.IO.IOException that would occur if anotehr process is reading or writing the file.
However - how can we do this without the bad paractice of using an exception handler for unexceptional process flow?
How can I Search for a Image File in a spesific Folder. I need the code to be able to find an Image File by searching for an string in the Image File's name. For instance if the string I am searching for is "26" the resalts will bring up a file with a name like "Nick's Pie 00026" Hendri Bissolati [URL]
I have a folder that contains .txt, .pdf, etc files. I want to check if the folder contains a .txt file.If yes, I have to perform some action, if no, no action will be performed.I have this sample code to do the above, but with the know .txt file name.
I have a folder with several textfiles. The only thing i need from the files is the last 10-15 lines from each file, printed into a new file. There is a sentence that is uniqe inside (but the same for all) at the line i want to start copying from.In other words i need to seach for a spesific word, copy everything from that line to the end of document, and print that to a new doc. Repeated for all files in the current folder.
I have a list of users with me and I need to find out programmatically which of the users present in the list have read/write permissions on a particular folder/file.
