I'm using the coding below to determin if a certain file exists on the hdd. However there is an error on this line: If FileExists("C:myfile.txt"))="False" then msgbox "False"
it gives me the following error message:End of statement expected.
what am I doing wrong?
[Code]...
I would like to check if a URL exists -- without requesting the file. The program needs to check if a PDF or Excel spreadsheet exists at a particular URL. If it does, it might want to download the file, but it should not download it every time.
I currently use the WebBrowser.Navigate method to do this, but it always downloads the file. But I don't want to actually download the .pdf or .xls file, I just want to determine if the URL exists.
Below is the code that is adding a toolstripmenuitem at runtime. I do need to check elsewhere to see if it exists. What I have below is incorrect. How would I change the conditional check below?
ToolStripMenuItemFile.DropDownItems.Add("Save")
ToolStripMenuItemFile.DropDownItems(2).Click += New EventHandler(SaveFile_Click)
If ToolStripMenuItemFile.DropDownItems(2) IsNot Nothing Then
ToolStripMenuItemFile.DropDownItems(2).Text = rm.GetString("Save")
End If
Is there a way to determine if a Printer exists?I want to warn my users that a printer doesn't exist before they send reports to print.
View 4 RepliesI have a function in VS2008 VB.NET that creates a dataset and reads field values from that were loaded from a SQL Server 2008 database tables. The tables are from varied sources and in some cases particular column/field names are different. Some use a long name; others use a short name. I need to determine whether a short name or a long name is being used.Pseudo code:If row("ShortName") Exists then ReadDataFrom r("ShortName").ToStringElse ReadDataFrom r("LongName").ToStringEnd If
How would I determine if a particular column name exist in a dataset or datarow?
I wanted to create a login system that would have 3 tabs 1 for regular login, 1 for admin login and 1 for account creation. So far so good. It saves the accounts by saving them in a .urs file in the map called /Users/. However when this map does not exist it will show a error. I would want to know what code or so to put into the form_load which will make my program create the map /Users/ if it does not exist. As im not familiar with all the codes and stuff. The only thing i can come up with is
Mkdir "/Users/"
but then ofcourse it would create the folder users everytime i start the program. not i was still "Hello Worlding" a few days ago, so i really am unfamiliar with any sort of high-skilled programming which i probably dont understand.
Im just trying to determine if a website exists when i navigate my webbrowser. via messagebox.Ive tried this so far but it wont work:
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
If WebBrowser1.DocumentText.Contains("Action canceled") Then
[code]....
I am trying to create a function that will determine if a worksheet within the active workbook exits. I have searched many web sites without any luck. Here is the coding I have currently:
HTML
Function SheetExists(ByVal sheetname As String) As Boolean
Dim oWorkbook As Excel.Workbooks
[Code]....
It errors out at Dim oWorksheet As Excel.Worksheet = oWorkbook.Sheets(sheetname).
The error message I am getting is "Object variable or With block variable not set."
I have the name of a form in a string variable, e.g. "frmOptions". I want to:
1) get the fully qualified name of the form
2) determine if the form exists in the application
3) create an instance of the form
4) show the form
I know that using reflection I can do #3 this way, but I need to get the fully qualified form name first[code]...
I am working with LINQ to XML in VB (although answers in C# are great, too). First off- my code works, so this is not critical. However, I can't help but think that what I'm doing with conditional logic should already be doable using the LINQ query itself. Here's what I've got:
'Get the Description elements in the ResultData section where the value is "Op Code"
Dim opCodes As List(Of XElement) = (From c In xdoc.Descendants("ResultData").Descendants("Description")
Where c.Value = "Op Code"[code].....
Please don't be too critical of my method of locating the sibling nodes- the XML files are produced by a third-party testing device and this is the only generic way to get the values I need. What I'm really looking for here is a better way to handle the If block.
Just like the title says, I have a webbrowser and I need to determine if the element exists or not before I invoke it.
View 1 RepliesPublic Class Form2 Private Sub TextBox1_Click(sender As Object, e As System.EventArgs) Handles TextBox1.Click
OpenFileDialog1.FileName = Nothing
OpenFileDialog1.ShowDialog()
If Not OpenFileDialog1.FileName = Nothing Then
TextBox1.Text = OpenFileDialog1.FileName
[Code]...
Here's my code: System.IO.File.Move(Form6.OpenFileDialog1.FileName, "Temp") I'm trying to make it so that the program copies the file that you select in the OpenFileDialog and moves it into the "Temp" folder. It gives me an error saying: Cannot create file when file already exists.
View 7 RepliesI am trying to write(what I thought would be a simple piece of code. I was wrong.
What I am trying to do is to get an application to check if a file exists, However, I have it wrong as the file obviously does exists, but when I run the application it tells me it does not.
Imports System.IO
Public Class check
Dim checkfile As New FileInfo("C:\HelloWorld")
[Code].....
im trying to make code to check if a file with the same name exists twice in the same dir one with .dds and one with .veh file extentions and if they do put in a listbox but if only one exists then it puts it in another listbox i have made code to filter .dds in to one listbox and .veh in another but i dont know how to make the "check" if they are both there
this is the code i have to split them at the mo
For Each files In dir
Dim path() As String = files.Split("\")
Dim chunk As Integer = path.Length
[Code]....
but i wanted the Else for the .dds files that dont have the matching .veh file
OK, hi. what i'm trying to do is ultimately detect wheather a word doc exists. I don't want to open it.hat it's going to do is detect if the file exists.
View 12 RepliesHave only just started trying Visual Basic after using Delphi almost ever since it first came out. How on earth do I see if a file exists? - simple terms please
View 2 RepliesI have the following
If Dir("C:Test.txt") <> "" Then TextBox1.Text = "File exists" Else TextBox1.Text = "File does not exist"
End If However, I'd like to use this alongside a DataGridView.
Basically, when the application runs, the user selects a folder for file storage. Then, in the DataGridView, the contents in each cell of Column 1 become the file name. In short, the contents of a cell, plus the selected folder for file storage, becomes a whole file path.I need to use the above code to get my application to check if the file exists, and if it does, it should place the text "File Exists" in column 2 of the DGV.
I can't work out a way for the DGV to be "continually aware" if files have been created and so to update automatically without the user having to press buttons etc. As soon as the file exists, the correct text should be placed in Column2.
In my vb.net winform application, I am moving the file (ex: sample.xls from one folder to another. If file already exists with the same name, the new file name should be incremented (ex:sample(1).xls). How can i acheive this?
View 1 RepliesI have a method which tests for the existence of a file prior to carrying out some manipulation of file content as follows:
[Code]...
The idea is that if the file does not exist, then the file is generated by calls to the NLog logger instance, at which point the file is created and the specified header info is inserted. The method works fine from the application itself, however I have a simple NUnit test which implements a test method to verify that the file is created and populated as expected. When I step through with the debugger, I find that '_logPath' is set to:
D:Documents and SettingsTE602510Local SettingsTemp
unit20ShadowCopyCache4288_634286300896838506Tests_-1937845265assemblydl37cdfe61aaa18c98d_f0a1cb01logs2010-12-22.log
Unfortunately, despite the fact that the file DOES exist, the call to File.Exists returns false. From earlier viewing of the config path the above path would appear to be correct for these NUnit tests. Does anybody have a clue what is happening here and what I need to do to get the desired result? The pathname to the log file as per the XP file system is:D:Documents and SettingsTE602510My Documents_VSSWorkAreaPsalertsIpTestsinDebuglogs
What is the easiest want to check if a .dll file exists, then to load it ? ( i don't need to use modules from that dll file, i just want to run it ).
View 1 RepliesHow do I check if any file exists in a folder.
If found I want to delete it.
I can check for a specific file:
If System.IO.File.Exists("C:Labs" & "Lab0.txt") = True Then
msgbox "Files Found"
else-------------> I want to Delete it End If
Check if file exists in a folder
View 3 RepliesIn vb.net (using vs2005), I'd like to see if www.domain.com/myfile.txt exists.
View 2 RepliesWhat I want my code to do is to check to see if a text file exists, and if it doesn't, it'll create one and write to it, but if it does then I want it to make the contents my label's text.
Here's my code:
Imports System.IO
Public Class Main
Private Sub Main_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
I haven't used System.IO before, and I'm a little stuck.I need to check if a file exists, for example C:Documents and SettingsverraineDesktopSURNAME Firstname v1.docx, if this file exists the filename has to become v2, and so on. Usually there will only be a v1, but in the case that a clients position changes we have to be able to save the new version without overwriting the old one.
How would I be able to do this efficiently? I'm uncertain to say the least. Because, if I manage to find out how to save the file as a different number, that's alright, but if that next number exists as well? I can only think of ways to do this that require a lot of code.
I need to detect if a file exists within drive C: but I do not know in advance in which directory it should be located so this means that I have to search the entire disk. Is there a way to perform this process directly (through an existing method for example) or do I have to write code for getting the directory structure and search each directory?
View 3 Repliesfile.Exists function not working
Dim f1 As New FileInfo(Server.MapPath("/CaseStudyImages/TemporaryImages/"))
Dim f2 As New FileInfo(Server.MapPath("/CaseStudyImages/" & success & "/"))
[code]....
How can I check if a file exists on a server? Let's supposed that I want to check if "[URL]" exists. How can I do that?
I tried to do this but it does not work:
Dim fso As New FileObject
If fso.FileExists("[URL]") Then
MsgBox("exists")
Else
MsgBox("File not found")
End If
The following code will save an item to file over and over again, but how do I save an item only once?
Dim w As New IO.StreamWriter("E:est.txt", True)
w.WriteLine(ListBox1.SelectedItem, True)
w.Close()
If, for example, number1 is already saved in the txt file then how do I not save it again, using something like the following?
dim exist As IO.FileAccess ("e:s.txt")
if exist.that.item.is.exist= true then
w.WriteLine(ListBox1.SelectedItem, True)
[Code] .....
I am using VS 2010.