Asp.net - Smtp Clients `SendAsync()` Method?
Mar 18, 2012
Protected Sub btnLocalSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnLocalSubmit.Click
Dim logic = New connections
logic.emailsToSend(User.Identity.Name, getURL, reportedBy)[code]....
I am using the smtp clients SendAsync() function to send out emails asynchronously...but this function does not work ...why?? i do not get any email..when i send it Synchronously...i get the emails, this means my settings are correct...so what is wrong with the SendAsync() method??
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Apr 22, 2009
I am trying to send E-mails asynchronously and it works fine as long as there isn't an AlternateView attached to the e-mail. When there is an alternate view, I get the following error:
Cannot access a disposed object. Object name: 'System.Net.Mail.AlternateView'
System.Net.Mail.SmtpException: Failure sending mail. ---> System.ObjectDisposedException: Cannot access a disposed object.
[code]....
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Aug 14, 2009
I'm using the TcpClient and TcpListener classes to read/write to the network when a request comes in on port 25. All I'm trying to do at the moment is make it so that my server program can receive SMTP messages from other SMTP servers. I've tested in Telnet - if I connect to my own IP on port 25 and type EHLO, MAIL FROM, RCPT TO, DATA etc then all works as it should and the details I entered are logged by the program (it doesnt do anything about delivering these details/email yet).all looks good... but then when I try and just send an email to my domain from my work account I can see that a connection is made to my program and the string "EHLO workdomain.com " is received by my program - my program responds to the remote SMTP server with "250-mydomain.com Hello" and then a CrLF and then "250-OK". After that point however, my app does not receive anything further at all from the server at work. I'm guessing I am doing something wrong with the data I'm returning when it sends EHLO but can anyone point me in the correct direction?
I was using telnet to test with, it seems that I have made it work only with telnet.In telnet each time I type a key the data is passed to the server, however with a real SMTP server it just sends each entire command in one go. So after altering my server a little I can now get it to respond with the 250-OK which I thought it already was doing.. but it still doesnt work. The remote server just sends EHLO and then thats it nothing more.Something interesting, at the moment I am ending all of my responses to the remote server with VbLf - if I change this to VbCrLf (which is what I believe it is meant to be according to the SMTP standard) then I get an infinite amount of empty strings sent to my program (or perhaps some other character that just shows as an empty string in intellisense when stepping through the code). Changing it back to just vbLf or ControlChars.Lf makes it go back to just sending EHLO and then nothing else..
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Apr 24, 2010
I want to use System.Net.Mail.SendAync in an ASP.NET MVC2 application. I see that it throws an InvalidOperationException if there is already a SendAsync call in progress. Does this mean only one SendAsync is allowed per host, or per thread? For example, if I simultaneously have 2 web users from 2 different remote hosts, can each use SendAsync at the same time?
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Jan 23, 2011
I'm having a strange issue with a memory leak associated with ping.sendasync. My program has a section in it that allows the user to specify X number of servers/computers to monitor.About every 30 seconds it will execute a routine that loops through the list and sends a ping asynchronously to each server/computer.If I keep an eye on the process memory usage in the task manager it will creep up about 1-1.5MB each time the routine is executed. Now, this program will be used and left running for hours and hours for each person, and over the course of the day the mem usage can creep up close to a gig...... (it happened the other day until I noticed it)
Server Indicators routine (starts the ping.sendasync):
Public Sub ServerIndicators()
ReloadingServers = True
[code].....
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Jul 21, 2009
I have that code running into a windows service and the service seem to have a memory leak, something is wrong for sure. After looking at the whole code, I think it might be inside one of these function but I cannot seem to find where it could be.
[Code]...
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Mar 18, 2012
One thing I don't understand with sending Async emails from ASP.NET page is when we call SendAsync it should be executed on a separate thread so our page can continue its execution flow and finish its response no matter how long the sending will take.How then we can call method on the same page using SendCompletedEventHandler? The page object might not exist by that time and in this forum there are examples that people doing that.My expectation was that I can have separate class which might have static method which I will execute on SendCompletedEventHandler and this way we can report possible errors.However when I'm raising exception in there the exception comes as part of Page Response. So for me it looks as SendAsync works on the same thread, page waites for it to be executed and comes back with information on any errors raised by it.
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Oct 19, 2010
Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
[Code]....
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Jul 26, 2010
I created application database by vb.net and sql server 2005 now I have some computer on the one of them I installed sqlserver 2005 and other (Clients) computers I installed Application how I can connecting my application to sql server on the pc1 or how I can using connection string.
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May 17, 2010
XML is used as one of our main integration points. it comes over by many clients at a time but too many clients importing at the same time can slow down our database to a crawl. Someone has to have solved a problem like this. I am basically using VB to parse through the data and import what i want and don't want.
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Apr 30, 2012
i was just wondering what other options we have. MDI seems to be main feature most clients have.Would you use one if building an irc client? I started off with out one. Half way threw decided to start using one.
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Jun 9, 2011
How to make clients on sql server i mean when i will install my application on clients how i will connect it with sql server?
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Feb 4, 2011
I'm developing an application, which will have a common db in a server (SQLServer db) and the client PCs will have my program installed - in a LAN.
So, my question is, when the users in the client PC wants to pass some messages (for eg: one of the user got a message from his boss that all of them are requested to meet him). That is, I want to implement a communication system through my app. It will be a common message system. That is, just like a shoutbox.
So, do I have to use a TCP based communication system or just use a timer to check the db for any new messages and display them ?
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Jul 1, 2011
How can I retrieve the clients IP address that in use of my application? Is there's a code that retrieves a value from clients computer running application?
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Mar 8, 2011
i want to designe a simple program that have one server and multiple clients.i program with vb.net,but dont know anything about winsock, can you send me a sample code for start.
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Dec 2, 2009
(Using vb 2008 express.)
I am trying to create a server to send clients text on request. I am using a tcp listener to accept clients then send each client to a thread in a threadpool which deals with each client's request then closes the client connection. It seems to work fine but I would like to know how it works. Using the listen loop below I cant help feeling I should be sending some values to the threaded sub. How does it know which client each thread is dealing with?
Sub ListenLoop()
Looop:
Client = Server.AcceptTcpClient
[Code].....
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Aug 27, 2010
with XP and Outlook it works perfect, with Vista it does not.
Any chance to get it running on all clients? The source is very simple.
Trying to send some Input data using mailto.
Always works, but on some clients everything is in the subjet and not in the body! Other clients seem to be ok.[code....]
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Oct 4, 2009
I am programming a chat like application using Tcp. Now I have a probem. I am going to have loads and loads of data being transferred so I will have to use 4 seperate ports.[code...]
My problem is for me to use a maximum of 4 ports all together transferring data from the client(s) to the server(s) I will need 4 clients and 4 servers. I need to open 4 instances of 4 clients. I was going to put a client in a form and then when the client is running it creates 4 instances of that form but than there would be too much confusion going on. I think there my be a way to use Classes instead of forms.
[code...]
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Oct 7, 2011
I am trying to make a host so that as clients connect they will appear in a list box. I can get multiple connections going, but the list box remains empty.
[code]...
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May 5, 2009
We need to conditionally disable GZIP compression if user's browser is IE6 (it hangs browser for 5min) in few pages of larger site. Server is IIS7 and has compression for static content turned on - want that compression left working if user agent is not Mozilla/4.0. ASPX code sample anyone? Alternatively, code to conditionally redirect to the same page on another site (could create another virtual site with compression disabled) but need to pass all parameters (GET/POST).
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Aug 16, 2011
I want to write a warehouse program which has near 80 clients.My program has to make some reports and control entrance and exit of commodities in warehouse and store data in SQL Server Database.I need to know that which one is better: using windows application which give me a lot of feathers or creating website which reduce my ability in using objects?I have to mention that my clients will not increase.
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Jun 25, 2009
I have been programming a TcpListener Program and I have everything working right! So far... Except that when I have multiple clients connecting to my Server... I used a try catch statement to catch the error and it says that tcplistener doesn't allow multi connections... think creating a new thread for each connection sounds like the most reasonible answer but I can't grasp the concept of it...
Here is my frmMain:
Imports System.IO
Imports System.Net
[code].....
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Apr 21, 2011
In our company we have some specific softwares that have several releases during a year and we were wondering to notify the clients about new releases automatically. How can we code this functionality? I mean from where should we begin? we have an ftp which will contain those files. And How is that possible for us just to do the upgrade without uninstall and re-installing the whole package?
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Oct 8, 2011
I posted this code in another thread as an example of how to listen for connecting clients using TcpListener.it is a small part of a larger project, its all my own work,
Imports System.Net
Imports System.Net.Sockets
Public Class Server[code].....
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Aug 2, 2010
Given the code, ss there a way to propagate messages send from any of the multithreaded chat client to all the other chat client:
First the main will call startClient:
Public Sub startClient(ByVal inClientSocket As TcpClient, _
ByVal clineNo As String)
[code]......
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Aug 27, 2010
Actually I have created a chat application is it possible to send data to particular client only?
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May 5, 2009
I have a program in accounting that is used by many clients and users at the same time in a network. Many modules have a reference no. like in the receipt that increments upon saving, it also Checks whether that reference no. is already in used.
However problem arises when the many users use the same module at the same time. My question is How do you manage incremental values on each client's PC? Their local system somehow competes for the next incremental no.
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Feb 28, 2009
Using this example here, do you think it would be possible to develop it to show who is connected to the server?
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Mar 2, 2011
I have a ASP.Net VB.Net application, which I developed an deployed in about 2004. I have just upgraded it to a new server and IIS 6.0. The application requires users to login from IE it and maintains their State using sessions on the server. I would like the users to be able to have multiple browsers open, each running with unique data on their client system. Is this possible, if so, what do I need to do?
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Jan 23, 2009
I am working on a client/server application. Everything seems to go well for a while (a few hrs, a few mins its kind of random) then suddenly clients stop receiving data. maybe 1 or two, or all of them. in the end I end up having to restart the server piece to resolve it, but I am trying to understand why its doing this. I've added try catches around the send piece, but it doesnt error out. When the app fires, the listener is started on its own thread. When a new connection is made, that connection is passed to a class that handles all of my connection data(send/receive, responding to commands, etc). The class is started in its own thread, so each connection is running in its own memory space. This issue seems to happen with 1 client connected, or 20, it doesn't really seem to matter.
This causes other issues, like a customer who thinks he is disconnected, will shut down his app, which is supposed to send a command to close the connection on the server side which it does not., so now I have several "closed" connections still open on the server, which is obviously also bad. Another thing I dont get is that it worked fine when I was developing the pieces on my dev box, so I dont get why I have all of these "timeout" issues now. (I put that in quotes, because the timeout period is the default of 10 mins, and I xmit data, at LEAST every minute when the server pushes data updates to all clients)
Here is some of the relevant code
vb
'Command Object, this holds all of the command information being passed back and forth to tell the server what to do, and as well as hold the response.
'The strCMD is the command, strParms is the parameters of the command, obj is ANY object I want to send along with this information
<Serializable()> Public Structure CommandData
Public strCMD As String
[Code] .....
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