Check What Application Block Connection?
Dec 3, 2009
I'm having a problem with some users, my vb tools always check at the splash screen a response from a server with a simple:
Dim MyResult as string = oWebclient.DownloadString("www.mydomain.com/page.php")
This actually works for most users but in some clients the firewalls I think they block this call or bypass or something like that, I found that after telling the user to turn off the firewall everything works ok, now I have some users that according to them they don't have a firewall or they already disable and still they have the problem.
You can see from the image the error message they receive, so my question is do you know any kind of free tool that I can send to the user to maybe log what program or whatever is blocking the program to connect?
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Mar 26, 2010
<Visual Studio 2008(VB.Net) + SQL server 2005>
I have an application for HR and I am trying to give feedback to users on login window wheather it is connected network and database.
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Aug 5, 2011
I m using proxy in httpwebrequest
[Code]...
But i m unable to check any outgoing connection from my application in fiddler how i can check what request my application sent to server if i m using proxy
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Oct 25, 2009
Is there a way I could block connections to an IP address (Incomming and Outgoing) in visual basic 2008? I have a different method, using the windows hosts file. I could make it redirect, but on the host file, could I make it launch a certain application when it blocks an IP. Like, launch a file called blocked.html that says "Webpage blocked" on it? and if u get this far, how can I see when an app attempts to connect to the internet. Like on bit defender firewall, say aim6.exe trys to connect to a server, how could i warn the user of this???? (Maybe using winsock)
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Dec 1, 2009
I'm trying to incorporate TransactionScope into my code and am failing at the first hurdle. I am unable to open a connection inside TransactionScope block. I get exception Connection Not Open.
Public Sub PerformDBWork()
Dim cnA As New OleDbConnection(My.Settings.DB_CONN_BUSINESS)
Try
cnA.Open()
[code].....
My cnA.Open() fires as expected but my call to cnBusinessDB.Open() fails.
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Sep 18, 2011
In Finally Block, How can we check if an exception occurred or Not.I am programming in VB.Net. Why i am asking is that in the Finally Block there could be some things you would like to do if an Exception has occured and some things you want to do if an exception has not occured. So, within finally block how do we know if an exception has occured
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Sep 18, 2011
I am Not using the "Catch Ex as Exception" for some of my application's architect details.So, if my code is something like
Try
'code here
Catch ex As ApplicationException '!!! i.e. ApplicationException
[code]....
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Aug 18, 2010
We have a current implementation of a log file manager where it's two main purposes are to 1. rename files generated by other programs with a date/time stamp so they create new ones, and 2. delete files older then X amount of days from a specified folder. The program also makes it's own log file which records when these events happen.Do you think the Logging Application Block would be useful in this instance? The old file manager is written in VB 6.0 and an upgrade to VB .Net would not take too long, but is it worth it to try and implement LAP into it?
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Nov 29, 2011
I'd like to block unwanted application from running in my system, mostly setup until given access by my application. I would have a white list of allowed application.
how do i imoplemnt this in vb.net
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Nov 24, 2009
So I created an application with vb.net, I added Messenger type Api in preferences, compiled my program and everything was fine. However I can't run the program from other directories. It says that the .dll is missing. I'm trying to include the .dll to the program somehow - no success, how that should be done? Friend tried to help me and said I should add "Application block" something to the references. I can't find that though.
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Oct 2, 2009
I have a block of code in an application I have written. I have tried two different variations.Below are examples of the method I used: [code]
The second example adds only three more lines of code. Yet, the app would run at about 10% of the speed as it would in the first sample.
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Oct 7, 2010
Is there a way to intercept a MsgBox() from an external application and block it using VB.Net?
For this discussion, let's say the MsgBox Title is "SQL Application" and the Message is "SQL Error - Try Again".
I have found some examples of looking for the MsgBox to pop-up (by watching for the Window title) and then sending key(s) to press OK, but I was curious if the whole process could be avoided. Otherwise, the user still sees a MsgBox or a "flash", even if it's only temporary.
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Dec 10, 2009
I'm a college student just starting out programming in VB and am having a lot of trouble trying to get my drawing program to work. Currently i am using Microsoft Visual Basic 2008 Express Edition and whenever i try to debug my program the window it's supposed to run in is just a gray block. I'm not too sure if this is the right place in the forum to post this so if it is just let me know and ill move it. c:
[Code]....
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Mar 31, 2009
Is there a need to explicitly close the connection in this Microsoft Data Access Application Block for .NET? i am encountering timeout expired pooling errors in the sql server 2000. I am wondering if the unclosed connection is the problem
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Jan 27, 2012
SQL connection - I planned to create one sql connection object inside my own singleton class (say connectionmanager with Reference counting for 'SQL connection object' which is a member of the class) and open/close the connection whenever needed. As I like to give high importance for performance. And my application is a desktop based application accessing a remote database server (SQL server 2008), and will use only one connection string, 50 concurrent desktop users may access db server. Please advice.
As like many articles say if the answer is "Connection pooling is taken care by ado.net" - Does that mean that scope of connection pool is entire life of Application instance? Or is it in the scope of SQLConnection object?
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May 2, 2010
I am wondering, how do i check for missing cammas and quotes in a block of text like this:
[Code]...
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Oct 18, 2011
I am using logging application block for EL 5.0. I defined listener like below.
<add name="FlatFile TraceListener" type="Microsoft.Practices.EnterpriseLibrary.
Logging.TraceListeners.FlatFileTraceListener,
Microsoft.Practices.EnterpriseLibrary.Logging"
[Code].....
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Sep 13, 2010
When using WCF together with Enterprise Library 5.0's validation application block, is it possible to customize the error messages which are sent back to the client? I've added the ValidationBehaviour-attribute to my service contract and the FaultContract-attribute to the operation:
[Code]...
The service returns ValidationFault as it should, but instead of having the error message and tag which I've defined, it uses some generic values. Is this a bug or am I doing something wrong?
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Jun 17, 2010
What's the easiest way to check ADO.Net connection is working? my mssql database is on another pc.
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Jun 4, 2011
I have an VB.NET application. This Application is permanently resident in memory and minimized to the tray area because we use it very often. The problem comes in when we VPN into a client's site. These VPN connections trash all other network connections to and from our machines.Then every time my VB.NET application refreshes its database, errors start occurring, because the machine has lost connectivity to the SQL server, however, these are not at the connection level, but only when the reader attempts to read.
I am checking for connection.open, but because of the SQL connection pooling, I just get a previous connection that was valid before the network was cut. Is there anyway to check if an actual SQL connection is valid, prior to re-issuing a connection from the pool?[code]...
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Mar 30, 2012
I need to check whether If the Internet Connection Is available or not
If My.Computer.Network.IsAvailable = True Then
Return My.Computer.Network.Ping("8.8.8.8")
Else
Return False
End If
Above code returns Whether the PC connected to the internet, But I can't Check It through out the Software, I am only Having Single Form.
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Apr 12, 2011
I made program which connects sql database via WiFi network. I have timer wich every 10 minutes updates textbox information from database. If Network connection will be lose, i do not whant to get any error and after that lose data wich is in textbox, until sql database connection will not be. How can i check if connection exists and after that update data from database? Something like that:
Conn = New SqlConnection(ConnectionString)
Conn.Open() ' if connection is lost there gets error
If Conn.State = ConnectionState.Open Then ' But this does not works
[Code].....
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Sep 16, 2011
have this sql connection functionin a class
Class con1
Public Function ConnectToSql() As SqlConnection
Dim conn As New SqlClient.SqlConnection
conn = New SqlConnection("data source=" & Server & ";" & _
[code]....
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Dec 27, 2009
Im trying to check my internet connection using just a button how do i do that?
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Jul 13, 2009
We are working on an ASP.Net/VB.Net application using Enterprise Library for our data access (DAAB).
We are trying to store DateTime values in an Oracle Date field. However, the precision is being lost. Currently only the year, month, and date are being stored. We need better precision than this.
Oracle Dates are supposed to "includes not just the month, day, and year, but also
the hour, minute, and second. "
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Jul 1, 2010
I'm writing a Silverlight 4 application and would like to check when opening the installed out of browser application, whether there is a valid internet connection (to then download some data from my website). I realise that I could put a try catch around a WebRequest but that seems a bit hacky to me.
EDIT: What I meant by valid internet connection is just connected to the internet
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Mar 4, 2011
How I can check if the internet connection is working or not? i have to check every few seconds without getting stuck.
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Nov 19, 2011
This is the work of one responder for the most part, and is not indicative of the quality of most of the posts.But you can judge that for yourself.
If you are writing a program that is used to monitor the status of your network, then this thread may not be of interest.
If you are an application programmer that uses network resources to accomplish your goal, i.e. you are using SMTP, FTP, HTTP, NNTP, NTP etc., and you think that you need to check for a connection first, then read on.Follow up to this.Before getting all geeky let's take a little detour...
Five days a week I get up, eat breakfast, check my email, forums, etc., take a shower, get dressed, and then drive to school.Many of you probably have a similar routine.What is interesting about that is not what we do, but what we dont do,because of our expectations and experience.Here is what I dont do.
I dont stick my finger in the electrical socket to see if there is electricity for the coffee maker and toaster.I dont fire up the command prompt and ping some host on the internet to see if I have connectivity.I dont check the battery, tires, water level, clutch fluid level, washer fluid level, etc.,before I drive off.
All of that is based on expectation and experience.So why would you write an application that pings the internet before it did something (SMTP, FTP, HTTP, NNTP, NTP etc)???? Is your experience or expectation that the network will be down?To illustrate and hopefully convince you that, like Oblio, it is pointless, create a new form with three buttons. In the following examples I use a WebRequest / WebResponse as my 'Something'.Here is what some think is a good approach, the classic ping-then-do, what I think you shouldn't do.[code]....What is wrong with this code is that all of the network IO is being done without a Try / Catch block.
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Mar 23, 2009
I want to check the connection of server path eg[ URL] whether exists or notI tried this System.IO.Directory.Exists("http://localhost/MyProject/ ")but it always return false.So does anybody know how to check it?
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May 31, 2009
I have a little problem with checking if a sql connection is good.
Attached here i have a simple vb.net program that should check if the sql connection to the sql server is good. If i just run it once it works very well. But if i use it in a timer and check the connection to the sql server every 10sec it will only tell me that the connection is good (V=0).
I have tested the code with turning of the sql server service.
Dim connect As String = "Server=192.168.1.2;Database=Test;User ID=sa;Password=12345;Trusted_Connection=False"
Dim sqlconnection As New System.Data.SqlClient.SqlConnection(connect)
[Code].....
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