Smtp Has Suddenly Stopped Working - Doesn't Send Anything And Doesn't Generate Any Exception Message
Oct 13, 2010
I use Visual Studio 2003, VB.net, NetFramework 1.4 and Windows XP I have been using the following Code Snippet for a number of years in both Web Services and Windows Applications. However suddenly around the 29th September 2010 it has stopped sending E-Mails from both Web Services and Windows Applications. The same problem has happened not only to my own Network but on two other Networks, one using XP as its Server and the other using Server 2003. All 3 of these are using different ISPs.
[Code]...
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Feb 6, 2009
i tried updating my application on a vista home basic laptop. i get "myapp.exe has stopped working" then i restore back to the old version, it still give the same error. I am sure the old version is working because I tested it before updating it.
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May 10, 2010
im trying to generate an error message to the user to let them know a file doesnt exist.So far ive got the user to enter the file name into a textbox, they click search and if successful will load a new form with a PDF file reader built in( AxAcroPDF1 )everytime i enter the right file name i get the file loaded, if enter the wrong name the File page still loads with no pdf and no message saying file doesnt exist.
Private
Sub PictureBox1_Click(ByVal
sender As System.Object,
ByVal e
[code]....
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Aug 11, 2010
i'm tying to send email in my application directly by the smtp server but the server doesn't allow me to do that.The application its used by everyone in the company, so i set the smtp client UseDefaultCredentials to True, but the server replies with this when i try to send an email:[code].....If i set the credentials by hand, the server sends the email. So my problem is how to make this work to everyone? I don't want to have one public/friend var all time in the application with the credentials of the current user?
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May 5, 2011
I'm creating an application for my own use that allows me to notify my lawnmowing customers when their grass was last cut, how much they owe, etc. The application uses an SMTP client to send a MailMessage to the customers through my Yahoo! online email account. The code for sending the message is as follows:
[Code]...
However, every time I try to send the message I get an error message that says "Smtp Exception" and "Message could not be sent" or something of that sort. I have tried the following to remedy the problem:
Using different ports and clients found online Using a "Try...Catch" method to handle the exception. Every time I attempt to send the message the exception is thrown Can anyone offer some advice on how to fix this? The exception is rather vague and doesn't offer a whole lot on what needs changed, like an improper port or something.
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Sep 17, 2011
you see i have this but that send a webrequests but the only problem is that it doesnt generate a new session
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May 13, 2011
Mail.From = New Net.Mail.MailAddress(test@gmail.com)
Mail.To.Add("exc@gmail.com")
Mail.Subject = "Test"
[code]....
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Dec 4, 2011
This is for a blackjack game. Every time the dealer has 3 cards in his hand (first 3 labels) message boxes are supposed to appear corresponding to the value of these labels. When i click my button and 3 labels have a value in them, even thought they are equal to less than 17 and less than 21 a message box doesn't appear. [Code]
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Nov 10, 2011
I'm working on this application, and I was doing the error checking on it, and I can't get the message box to show.
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Oct 22, 2010
I have a function to recursively search through windows (and their child windows) to find specific ones, it works exactly as expected, however it causes "function doesn't return a value on all paths" warning. This is the only warning in my entire program, and although it might be silly, I'm interested in knowing if there is a way to stop this error from occurring, but still allowing the function to work properly.[code]
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Jun 12, 2011
I am trying to change the background color of a tooltip
I am using tooltip.backgroundcolor = color.colr
No errors but thecolor doesn't change
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Jun 8, 2011
So I have a program that I am converting to .NET FW 3.5 and I am getting the titled exception on the following line:If IsNothing(dsTopPI.Rows.Find(profile.Item("GEMSID"))) Then Continue For
which is in a for each loop. The thing is, I have set the primary key and when I put in the following code:Dim columns() = DSTop30Profiles1.DTtop30profiles.PrimaryKey Console.WriteLine("Column count: " & columns.Length.ToString)For a = 0 To columns.GetUpperBound(0)Console.WriteLine(columns(a).ColumnName & " - " & columns(a).DataType.ToString)Next
I get this in the output:Column count: 1 GEMSID - System.Int32
That would seem to indicate that there is in fact a primary key, right?
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Sep 10, 2011
I'm currently using this
Public Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Integer) As Short
Public Function GetKeyState(ByVal Key1 As Integer, Optional ByVal Key2 As Integer = -1, Optional ByVal Key3 As Integer = -1) As Boolean[code].......
But even when I do press control, the message box doesn't pop up.
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Jul 4, 2009
I want a message box to show when a username doesn't exist. I figured this would work but an error shows saying 'FileNotFoundException was Unhandled', for the fist line.
Dim UserFile As New System.IO.StreamReader(sPath & "" & UsernameBox.Text & ".txt")
Username = UserFile.ReadLine
Password = UserFile.ReadLine
[Code].....
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Feb 16, 2011
I have to build an application using it in order to communicate with some software. Basically, I need to be able to call this exe and have it run to perform some tasks, then close itself down.I have the tasks running on page load but since I don't want the application to actually open, I use a Me.Close() to close it once it's finished the tasks. So, the whole thing works great (the tasks are even performed) except the Me.Close() causes a message to come up saying the application "has stopped working." Is it because I'm trying to close it while it's loading itself?I am forced to perform these tasks in VB, so please don't just say I should not be using VB.NET for this.
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Mar 2, 2009
Note: this is not a duplicate of Jeff's question. That question asked "Is an equivalent?" I know there isn't, and I want to know why! The reason I ask is that I've only just become clear on how important it is, and the conclusion seems very strange to me. The Exception Handling block of Microsoft's Enterprise Library advises us to use this pattern:
[Code]...
The policy is defined in an XML file, so that means that if a customer has an issue, we can modify the policy to assist with tracking down (or perhaps papering over) the problem to give them a fast resolution until we deal with it properly - which may involve arguing with 3rd parties, about whose fault it all is. This is basically an acknowledgement of the simple fact that in real applications the number of exception types and their "recoverability" status is practically impossible to manage without a facility like this.
Meanwhile, the CLR team at MS says this is not an option, and it turns out those guys know what they're talking about! The problem is that right before the catch block runs, any finally blocks nested inside the try block will be executed. So those finally blocks may do any of the following: Harmlessly modify the program state (phew, lucky). Trash something important in the customer's data, because the program state is screwed up to an unknown degree. Disguise or destroy important evidence that we need to diagnose an issue - especially if we're talking about calls into native code. Throw another exception, adding to the general confusion and misery.
Note that the using statement and C++/CLI destructors are built on try/finally, so they're affected too. So clearly the catch/throw pattern for filtering exceptions is no good. What is actually needed is a way to filter exceptions, via a policy, without actually catching them and so triggering the execution of finally blocks, unless we find a policy that tells us the exception is safe to recover from. The CLR team blogged about this recently:
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Aug 18, 2010
Usually when I get an exception, the code line that creates it is marked yellow etc.. However now i only get a System.NullReferenceException as a line in the Immidiate window;
A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll
Is this due to some setting, or why don't I get any better indication?
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Apr 28, 2009
My module won't run, it can't find the project or library, and highlights: the Date function in: MsgBox (Date).This is happening to several VBA functions, but this is the first one.I have all the libraries referenced that I think I need, especially the Visual Basic for Applications checked.There is a MISSING: Office12 library, but the Date function is part of the VBA library, so I don't think this should be the issue.
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Apr 25, 2010
How can I check for my combo box to have a selected item? I want to display a message box if the user doesn't select anything from my combo box.
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May 18, 2012
I have this function I put together with help online and it works just fine until the program runs over night. I don't think it is night time that is the problem, just the long run time. I take bitmaps and place text on them then convert them to icons so that the image can be used on the system tray.
[Code]...
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Dec 13, 2009
Dim Keys As String
Dim Wait As Boolean
Public Shared Sub SendKeys( _
[code].....
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Jul 4, 2010
I have creating timekeeping application, I was used drag and drop for my datagridview. During build I can add, edit and delete records. But when I published and run there was an error saying (see below). [Code] When JIT debugging is enabled, any unhandled exception, will be sent to the JIT debugger registered on the computer, rather than be handled by this dialog box.
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Oct 1, 2010
I am developing a Winform Program in visual basic and I am using Access Tables. I want to use a bindingsource filter to do a search on Stock descriptions. I am using this but it doesn't seem to be working
Me.StockBindingSource.Filter = "ITEMNAME LIKE '%" & SearchTextBox.Text & "%' AND [Supplier1 Price] <> 0 AND [Supplier2 Price] <> 0 AND [Supplier3 Price] <> 0"
What's happening is that I am only seeing products where all 3 suppliers have a price listed that isn't 0. (Products have a zero price when it becomes discontinued or supplier doesn't sell that product but we may have purchasing history against it so it can't be deleted). Therefore we do end up with products where all 3 suppliers have a zero cost. These are the products I don't want this search to return.
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Dec 18, 2009
I have built a Wpf-ControLibrary-Project to put some Controls there. In one Control i need to get some informations about assambly, Version and directory path.in the past i have done this one:
Dim msg As String
msg = "AssemblyName: " & My.Application.Info.AssemblyName & Environment.NewLine
msg &= "Version: " & My.Application.Info.Version.ToString & Environment.NewLine
msg &= "DirectoryPath: " & My.Application.Info.DirectoryPath
MsgBox(msg)
but this doesnt working anymore. I get an Error which told me that Application isn't Party of the My Namespace.
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Nov 23, 2010
I am currently working on my WebBrowser, and when I make a copy of the shortcut to my desktop, and I open it, and says "Voyage has stopped working." (Voyage is the name of my browser)So, I am using MdiTabControl and GeckoFX in my browser. Do you think that is causing it? If so, how can I fix it? I know of WebBrowsers that use Gecko and MdiTabControl, that do not have this problem.
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May 4, 2009
I'm trying to make a easy hot key cheat system for a game. I have a timer that checks to see if the game is activated if not then it says game not running in a label box. If so then it says it's running. It detects it running so that's good. I want it to check to see if the numberic key was pressed like 1 and it will type in the cheat code. here's the source.
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Me.Focus()
[Code]......
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Jan 25, 2010
I have an ASP.Net form where I use a DropDownList control to display data retrieved from a table. However setting the SelectedValue of the DropDownList to a value not existing in the dropdown list does not trigger an exception.
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Nov 9, 2009
What is going on with my code. To .NET and handling SQL connections. I am trying to catch an error where lets say someone puts in something that violates the rules of the field (i.e. they put data in a field that doesn't matched what is on the other table.) Please find teh code I ahve put on the save button to try to catch the error. Instead of popping a message box up the program just closes itself.
Private Sub Job_tableBindingNavigatorSaveItem_Click_2(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Job_tableBindingNavigatorSaveItem.Click
Try
[CODE]...
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Sep 14, 2010
The below query fails with Null Reference Exception when there are elements in BOMIDs where MatID property is nothing.I thought the 'x.MatID isnot Nothing AndAlso' would prevent the x.MatID.Process part of the where from being executed. There are a couple elements in the BOMIDs collection that where MatID is nothing.
From x In BOMIDs _
Group Join y As PurchasedProcess In SpecialProcesses _
On x.MatID.PurchasedProcess Equals y.Name _
Into G = Group _
[code]....
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Nov 23, 2011
I have used persistance class and used following LINQ query.[code]but it throws an error saying. "Specified Method is not Supported".How can i get data from two table using XPO Persistance Class?
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