Catch Incoming TCP Connection Including Full Packet Headers?
Nov 3, 2010My code below. Problem description in comments.
Public Class Form1
'My local IP (going to be set to 127.0.0.1)
Private LocalIP As System.Net.IPAddress
[code]....
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VS 2008 - Sequence And Acknowledgement Numbers In TCP Packet Headers Are Made Of?
Jun 17, 2010im trying to decypher their structures and substructures and right now im wondering if anybody knows what exactly sequence and acnowledgment numbers in TCP packet headers are made of?
View 1 RepliesVS 2005 : Avoid Packet Sniffer To Pick Up The Outcoming Connection Details?
Aug 17, 2010I am thinking of creating a code to allows my project to pass through the port forward without the outcoming connection details being pass on the third party software such as packet sniffer.Is it possible to avoid packet sniffer to pick up the outcoming connection details?
View 2 Replies2008 Using/End Using Connection Object And Try/catch?
Feb 5, 2010a) If the function returns true OR false will utilising the 'Using/End Using connection' statement close the connection cleanly? b) Is the 'Return TRUE statement' suitable placed to allow an error to occur and be raised returning a value of FALSE?
Public function doSomething () as boolean
Using conn As New SqlConnection(My.Settings.SQLConn)
Try
[code].....
Catch Database Connection Error?
Feb 11, 2011Is there a way to catch a database exception and then redirect to an error page? I have a data access class that I use to make a sql connection and then functions that call it to execute my SQL commands. My problem is that if my database is not available I cannot catch that error. Here is the code I am using in my class[code]...
View 3 RepliesUsing TRY/CATCH To Test For Valid Mysql Server Connection?
Feb 19, 2012MVC3, VB.NET, using EF. I am working on coding up a simple function to handle checking for a valid MySQL connection. If the connection fails the test it will use the secondary server connection. This is required because our hosting provider does not provide failover or redundant MySQL servers. The problem is I tried to use a simple try catch method in the HomeController. This fails early because the Entity Framework is looking the connection that was set up when I set it up... Is there anyway to control that connection dynamically?
View 1 RepliesCustom ComBobox With Headers - Prevent Selection Of Headers?
Dec 15, 2009I am working on a windows application using VB.net 2.0 and want to create a custom ComboboxControl which displays multiple groups. I was able to display the items in Custom combobox with headers. Below is the sample.
Header 1
Item 1_1
Item 1_2
[code]....
I want to prevent users from selecting the header items. I managed to revert back to the previously selected item if user selects the header item. Problem with this approach is drop down collapses and then reverts back to previously selected item. Is there a way to check, if the item being selected is a header item and if it is a header item, do not collapse the dropdown. Basically I want to implement behavior of HTML select list with optgroup.
1_1 1_2 1_3 2_1 2_2 2_3
Insert To Sql Via OLEDB Connection - Including (already Accomplished Image Insert Directly Into The DB)?
Aug 20, 2009im trying to write to an sql database. im inserting an image, as well as some other information. I am using the following code which works fine, as long as i do not add an extra column/variable "LOCATION" in to the mix and leave "
'Cmd.Parameters.Add("@LOCATION", OleDb.OleDbType., 3).Value = "testing"
commented out. *this is undesireable as im trying to add extra criteria to be saved like LOCATION.
Try
Dim st As New FileStream("\serverfolder1storage" & "pdftemplate.jpg", FileMode.Open, FileAccess.Read)
Dim mbr As BinaryReader = New BinaryReader(st)
Dim buffer(st.Length) As Byte
[code]....
i am trying to store the location e.g "c:file1.jpg" in the sql db. Can anyone reccomend a solution to this using OLEDB? ideally i need to add approx 4 more variables. e,g
firstname
surname
dob
location
Error - Catch Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception'
Mar 25, 2011I have a program in VB.Net that receives mails from Outlook, extracts attachments and inserts the attachments into a table through a query. I would like to put the query/queries in a Try/Catch block, but cannot do so as Outlook exceptions cannot be caught, and it gives me an error, and unless I put a very specific exception, I cannot catch it. Is there a workaround?
Edit:
Try
Catch ex As Exception
End Try
Exception is underlined and when I hover on it, it says: "Catch cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not in 'System.Exception' or a class that inherits from 'System.Exception'". This is affecting all my other code which I'd like to put into a Try/Catch block.
Restructure Try / Catch To Eliminate Error On Myreader.close Command In Catch Part?
Jun 19, 2012The following code causes a "Warning" that Variable is used before value assigned.How do I restructure this Try/catch to eliminate error on the myreader.close command in the Catch part? Code appears to work fine but I dont like Warnings. [code]
View 8 RepliesButton_click Event Will Not Stop Execute After Error Catch Using Try - Catch Statement
Apr 1, 2011i have problem when i click a ADD button, there is one null value in the textbox .. so the try catch statemnt is to catch that null value error but after that the catch is success but the button click never stop excute the statemnt till the end of the button event.
View 6 RepliesNested Try...Catches - If An Exception Occurs In The 2nd Sub's Try...Catch, Which Catch Gets Excecuted?
Mar 4, 2009I have this scenario: in a Sub I have a Try...Catch statement.Within that Try..Catch I call another sub.In that 2nd sub is also a Try...Catch.(see below for example).Now if an exception occurs in the 2nd sub's Try...Catch, which Catch gets excecuted? The 2nd one, the 1st one or both?
Private Sub sub1()
Try
..do stuff[code].....
Added A Full Main Menu To Game And A Full Splash Screen
Apr 29, 2011I have made quite a nice and tidy little game. Its based around space invaders and works quite well. however because i have finished my college project almost 2 weeks ahead of the assignments release date, my tutor has asked me to tweak my project and make it better.So far i have added a full main menu to the game and a full splash screen. I would like to add in a section for recorded high scores but have no idea how to attempt this at all.
View 3 RepliesIf Throw An Exception From Within A Catch, Does The Finally (from The Catch) Still Execute
Jun 2, 2009If I throw an exception from within a catch, does the finally (from the catch) still execute? i.e.
Try
..some code with an exception in it...
catch ex as Exception
throw new SpecialException("blah blah" & ex.Message, ex)
[code]....
Catch Log4net Exceptions / Use Try / Catch Approach
Jan 23, 2012I need to catch log4net exceptions (its own exceptions not app exceptions logged by it). I wish there's a way of doing it this way: [code] I have this code implemented and there's no errors in compilation but i force log4net to have an error (pointing to a non existing database in the config file) and nothing is threw.I've tried the listener aproach: [code] and it's writing the errors to log4net.txt, the forced ones i mean.This last aproach has a couple of drawbacks: it won't append every error to the file, if the error is the same it doesn't write it, i can't get the listener to write every error to that file, only one (I don't know how to fully configure the trace listener, it might be that). Thus it won't append the date and hour to every line wich is a necesity for me. Finally i can't give structure to it (xml). Even if the listener work i need to use the try/catch aproach, since i'm using ExceptionHandling from Enterprise library to log the errors in my app.
View 1 RepliesError 68 'Catch' Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception' Because It Is Not 'System.Exception'
Feb 12, 2010I am using VB.NET 2005 to create a Windows forms application. I have a procedure named SendMail that creates an instance of Outlook.Application, to send an email from my application. I found the code on this forum, I think.The procedure works fine, but I can't use error handling with it.I call the procedure from a button click event. I put the procedure call in a try/catch block, and the application won't build, with the following error.
Error 68 'Catch' cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. C:datadevdmtiQTSQTSv7_1_20100212wQTSQTSReportsCriteria
pt_frmReportViewer.vb 43 21 QTS
Here is the code:
Sub SendMail(ByVal sFile As String)
' Create an Outlook application.
Dim oApp As Outlook._Application
[code]....
Detect An Incoming E-mail?
Mar 26, 2009Is it possible to detect a incoming e-mail?
I am thinking of making a small form pop out from the side of the screen for a specified time period with a message indicating a email has arrived.
Listening To Incoming Data?
Apr 15, 2010I'm listening to a something coming in on a serialport every second. how to start an event if there is nothing coming in all of a sudden.
The way I imagine it is on a timer.
Sub timer_tick
if serialport1.readline = "a" then
do something, its ok
[Code].....
VS 2008 Incoming Connections?
Jan 3, 2010I was wondering, if there is a way to block incoming connections from specific ip adress that tries to connect to computer
I assume that it cant be via windows host files
VS 2010 Incoming Serial Data?
Oct 29, 2011I have a controller board that is built by us that sends strings to the serial port based on inputs that it receives. The app we are working on seems to be receiving the data fine but it is displaying it in an odd way and I'm sure it is a simple problem I am overlooking. Here is the incoming code so far:
Private Sub SecuritySerialPort_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SecuritySerialPort.DataReceived
ReceivedText(SecuritySerialPort.ReadExisting()) 'Automatically called every time a data
[code]....
Display The Incoming Data On A Textbox On A Form?
Feb 9, 2011I am receiving RS-232 data from serialPort1.Readbyte and want to display the incoming data on a textbox on a form. This causes a "...cross thread..." error.
View 4 RepliesHow To Implement An Incoming Call Detection Feature
Aug 21, 2011I'm planning to create an application that counts the number of calls recieved based on the type of calls. For example: When a person gives a call an audio menu provides various options. If the person choose option 1 then the count value under option 1 will increment;If the person choose option 2 then the count value under option 2 is incremented, ect, ect,ect.
View 5 RepliesIncoming HEX Data Missing Preceding Zeros?
Jan 30, 2012I'm working on a project which involves communications with a remote device via a modem. Communication is accomplished via HEX commands. However, with my code below, I am not receiving zeros where they are meant to be.For example, a test file contains the following HEX:
010203040506070809
However, I am only receiving this:
123456789
The zeros are critical.
Private Sub receive_data(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
Dim buff As String
Dim i As Short
[code]....
Read Incoming Data From RS232 Port?
Sep 28, 2011I want to create an application in VB.net that will read data outputted by a RFID reader on serial port.I want to know how will my application be able to identify the interrupt generated by Serial port and will read data from there?
View 2 RepliesReceive Incoming Data From Serial Port?
Mar 23, 2011I am having problem receiving data from serial port. Btw, I am new to Visual studio 2010 too.
I do a test program on my PIC so that when button1 press, it will send character "Y" to visual studio; when button2 press, it will send character "N" to visual studio. I know for VS 2010, sending data out is by the command
[Code]...
Receive Incoming SMS Messages Via Gsm Modem In Program?
Jul 21, 2009I am working on an assignment whereby i am requested to receive incoming messages via a gsm modem, i have tried to do so by writing at commands to the serial port where the gsm modem is connected to but there's one specific line which gives me error when i tried writing it to the serial port, (AT+CMGL= "ALL") which returns me an error: CMS ERROR: 305 which means Invalid Text mode parameter The following is the codes i have done up to so far, can anyone tell me what is the correct way to write this specific line to the serial port or is there any other methods that is able to do the same thing?[code]...
View 8 RepliesSetting A Default Incoming Date Format?
Sep 3, 2009So I made a little program, and when I run it on my computer the Date format displays as DD/MM/YYYY, but when I run it on some other computers it displays as MM/DD/YYYY. Is there anyway to set the default incoming Date format? Or do I just have to be very careful about how I get/set parts of dates?
View 5 RepliesVBA To Sort Incoming E-mail Subects In Excel?
Jan 9, 2011i'm looking for a solution in automating the following which we are currently doing manually each day:We are getting mails overnight from different clients with different subjects. lets call the subjects 'succes' and 'failed' for now.All we do is ad a new column ech day in an excel sheet, and set cells to green (succes) and red (failed). Each client has a row.I want to automate this process by VBA, as I think it's the best solution.The VBA should read the mail in a folder, and look at the subject and from address.
View 1 RepliesBlock Connections To An IP Address (Incoming And Outgoing) In Visual C+ , C# , C?
Oct 29, 2009Is there a way I could block connections to an IP address (Incoming and Outgoing) in Visual C+/C#/C???
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? [code]...
Filter Incoming And Outgoing Data On A COM Port Terminal?
Feb 4, 2010Is it possible to filter the incoming and outgoing data on a COM port terminal... to distinguish it?
View 2 Replies