I want to test if a file exist and create it if necessary.Former I did it by testing folder and file then creating it.I want now to play with "try catch" exception handling, but it seems more heavy.I had to test the file twice..... Is there a cleaner way ?
Sub CheckLogFile()
Dim tempFolder$
'check MY_LOGFILE exist if not create it
[code]....
I try to find online any example for create an application autoupdate.
When I run my application it check in a webserver if exist new version,if exist the software run update.
I don't have a problem but I;m asking you something on the in VB.net.code. So in brief, this means that apart from 'Create', the 'Append' also create a file when it does not exist then?
View 8 RepliesI have Requests for VB(2005) very very important for my selly project!i need a button that determine if file exist and if that file exist then show a messagebox!and if not show messagebox!.
View 2 Replies[code]...
and from VB6 project I reference to Test.dll but an error messege was appear A reference to Test.dll file could not be added (If I create VB NET project and reference to file Test.dll it OK )
I am converting a lot of projects from VB6 to VB.NET. Many of these projects use the DAO method CreateQueryDef, something ADO.NET does not. I know there is a way to replicate this method in ADOX using Catalogs, but I wanted to stay with pure ADO.NET. I have been using CREATE PROC to do this, but some of the query def's in the VB6 version mention tables/queries that are not created until later. For example,[code]The way the projects are, it is not possible to simply flip these two lines. I was wondering if there is a way to force CREATE PROC a AS SELECT FROM b even though b does not exist yet, or if there is a different option in ADO.NET to replicate the CreateQueryDef functionality.
View 1 RepliesI created an application using the Ping control. So far, when "Button1" is pressed, it performs a ping test to [url]... How do I create it so that it will display a message in RichTextBox1, depending on whether or not it was successful?
View 1 RepliesI have been left to maintain some vb.net applications - all of which utilize SQL server 2000 as the backend db. I need to change a report in one of the apps to include some newly added fields fromt eh database. I added the new fields to the specific table in the "testing" SQL server database which is on a completely different server. I am creating a new data source and have selected the database icon and then selected a connection string that clearly points to the test database on the test machine. I then selected the table containing the two new fields but for some strange reason, the two new fields I added are still not showing up in the list there! I have checked and double checked and it's as if it's still pointing to the live database on the live server where these fields do not even exist yet.
View 3 RepliesHow can create a unit test for the the Page_Load function in ASP.net?
I am using build in Visual Studio Unit test frame work. I want to create a unit test that check the Elements of the web page and their values.
I know about selenium and its abilities in unit testing.
This is the web Page to test WebPageControl.ascx.vb:
Public Class WebPageControl
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[Code].....
I'd like to create a simple application to determine the writing speed. In this application I want to view a line of text (may be more than one line) to the user to write it. And I want to select (higlight) the character the user pressed in my line and to move like a cursor to the next character (or to put underline under the current charater). How can I do that? and what is the object or component i must use to insert the text. Finally, if I want to make it multiple lines how to determine the enter key pressed by the user and how to move the cursor to the next line?
View 2 RepliesI need to create code to send an e-mail within a coded ui test and cannot get anything to work. I seem to be having trouble getting the correct Import. We use Outlook.
View 3 RepliesHow can I write a unit test to test the actualWidth property to a userControl in Silverligh 4? I hoped that this method would pass, but it fails. I am using the Silverlight ToolKit april 2010, and VS 2010.
<TestMethod()> _
Public Sub TestAcrtualWidth()
Me.MyUserControl.Width = 100
Me.MyUserControl.UpdateLayout()
Assert.IsTrue(Me.MyUserControl.ActualWidth > 0)
End Sub
I feel quite silly posting this as I know my way around C++ decently and am writing an application in VB however I am getting quite frustrated with this problem.
Dim FileNo As Integer
FileNo = FreeFile()
Dim FILE_NAME As String = "C: est.txt"
[Code].....
When executing the above code it says at the FileOpen operation that the document does not exist or the relative path may not be right... I have looked in many place over the internet and even used the same examples from the Microsoft website however I get the same error.
I am a new user to VB and I am having difficulty with one of my assignments. The assignment states that to create an application that allows a user to enter three test scores each for three students. The application should calculate each student's average test score and assign a letter grade. The application should prompt the user for each student's name and three test scores.
[Code]...
I'm getting a suprising FileNotFoundException although i'm sure that the file exists.I simply wanted to add Logfiles(IO.FileInfo) as attachments to an email, therefore i tried to check the length of every file to detect if they must be added/zipped.This works fine if these files already exist. But if i've created them in this run, i get above exception when i try to check the length. It's oddly enough that i can write into these "not existing" files(actually FileInfo.Exists returns false) without a problem one line before.
Here is some code...
Creating one of the files in the constructor of a class named Log:
Me.LogFile = New IO.FileInfo(infoLogPath)
If Not LogFile.Exists() Then
'tried to use `Using` on the Stream but that doesn't change anything'
[code]....
how do i verify a file like a image or html exist on the web?
View 6 RepliesI have several photos stored in ~/image/ They are a01.jpg, a02.jpa...a09.jpg and so on. (some images maybe not exist) Also I have several controls their id name are image1, image2, ...image9 I want to make such function. If for example a05.jpg exist in ~/image/ then image5.imageurl= ~/image/a05.jpg otherwise image5.visible=false I use the following code, but it is failed, how can i solve it:
[Code]....
I've just recently started noticing this crash as my program has gotten more complicated. I have a few lines that look like this in my program:
Dim alines() = System.IO.File.ReadAllLines("C:deviceinfo.txt")
The problem that I am seeing is that my program is updating these files every second, so sometimes the files are being appended and or just being replaced as it is trying to run this line. Receive the error, "File is in use or does not exist." Is there anyway to put a line of code that tells the program that if the file does not exist to check again till the file does exist.
Sort of:
If System.IO.File.exists(cstr("C:deviceinfo.txt")) then
Dim alines() = System.IO.File.ReadAllLines("C:deviceinfo.txt")
else
loop
endif
Or I read somewhere that you can use:
If Len(Dir("C:deviceinfo.txt")) < 0 Then
or
If Dir("C:deviceinfo.txt") <> "" Then
Maybe:
Loop while Len(Dir("C:deviceinfo.txt")) < 0
else Dim alines() = System.IO.File.ReadAllLines("C:deviceinfo.txt")
next
I realize the danger of having a possible never ending loop in the program, but I cant think of another way to have the program wait for data and use the data immediately as it becomes available. I looked into having a wait() sub or to do system.threading, but my rational behind not using those are because waiting for 200 ms doesnt ensure that the data actually shows up, I could still receive the error.
How to make when they start the program if they dont have the file (config.ini) the program auto to create it , and how to make what to be put in the config.ini
like:
Config.ini:
// This is program for...
// site and other stuff
[Code]....
namespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
Here's my code:
Option Infer Off
Option Explicit On
Option Strict On
Public Class Form1
Public Sub NewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripMenuItem.Click
[Code]...
I don't understand the error, Argument not specified for parameter 'test' of 'Public Shared Function TestThis(test As String)'.
Partial Public Class Form1
Shared Sub ReceiveCallback(ByVal ar As IAsyncResult)
Form1.Invoke(TestThis, New Object(){"test"}) 'error
[code].....
Every time I turn on my computer this little message box comes up. By simply clicking OK it goes away. Is there a problem and how can I get rid of it.
View 3 Replieshow to let VB check if a file exist on the server with the name provided before uploading that file.show a message and restart the application without uploading if a file exist with that name.
View 16 RepliesRight now I have a program that checks login credentials against my Access(2003) database.It works, but the problem I'm having is that it's checking if the file.exist to frequently and with no real pattern. How I'm doing it isI have a My.Setting that saves the file path string as well as the connection string, during form_load I check if the My.Setting path string exist, if not then use an openfiledialog to find the file. Right now I have the database in a public drive, which is why I think that my program thinks that the file doesn't exist sometimes. This is how I'm doing all of the above:
'Some global variables commented out
'Dim log As String = My.Settings.loginStr
'Dim logCon As String = My.Settings.loginCon
[code].....
Is there a way to check if certain file extensions exist within a directory?
View 2 RepliesI need to create an application that reads from a word file and when it find a string (datefor_example) it should link to it automatically example the string is : dd_mm_yyyy , when the application is reading the word file the minute it reads the sting it should go and see if the file with the string name exists if it exists it should link to it automatically.
View 1 RepliesWith a program I'm writing, I'm using saved data from program instance to the next. So I'm just using a simple text file to save some data. But the first time the user runs it, obviously the text file will not already be created. How can I write the code to see if the file exists? I tried to use a StreamReader but it trips up when the code runs if the text file does not already exist. And if I use a StreamWriter every time, it will overwrite the file and lose all the data. How I can see if a specific file exists already, and if not create a new one? If it does exist, then open that pre-existing file?
View 2 RepliesI want to create a program that verify if a file on my host exist.Example: I have a button and if i click on, it verify if exist http://myhost.ro/test/test.txtAnd then if exist, textbox1.text = "The file exist " else textbox1.text ="the file don't exist ".. Can I create this program ?
View 17 Repliesi need to send mail after taking screenshot. If i clicked the mail button first should check whether the file exist or not. Find the code below and tell me how to verify it.
Private Sub SendEmail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SendEmail.Click
Dim objOutlook As Object
[Code].....
