Check If Port Exist In Firewall Exceptions List?

Oct 20, 2009

I need to check if port exist in the firewall list I am currently using this piece of code to check if port 80 exist do something if it doesn't then add it. This works fine but I feel It should be cleaner[code]...

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Check If Port Is Blocked By Windows Firewall?

Aug 15, 2011

How do i check if specific port is blocked by Windows firewall , both in incoming and outgoing connections.

I've seen code samples such as this one:

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim host As String = "localhost"
Dim port As Integer = 6900

[Code]....

But how can i know if the exception is thrown specifically because of firewall blocking, and not because of other socket errors?

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Use WMI And Admin Credentials To Tell Windows Firewall To Unblock A Port?

May 8, 2009

Use WMI and admin credentials to tell windows firewalll to unblock a port

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Create An Application Autoupdate - Check In A Webserver If Exist New Version,if Exist The Software Run Update

Dec 21, 2010

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.

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Delete Not Catching Exceptions When File Does Not Exist

Aug 30, 2011

I'm writing a SSIS 2005 script (vb.net)in which I want the functionality to checks if a file exists if so then delete it.For testing purposes I'm renaming files to replicate an exception i.e. file cannot be read for whatever circumstance,to ensure the error handling is correct.The code works fine and catches any errors with the File.Exists(errorLookUpLog File) command, if the file does not exist/cannot be read but not with the code below using System.IO.File.Delete(lookupErrorLogFile) as when file is renamed and therefore cannot be deleted (looking for the file under it's original name then no exception is shown (see full code below, have yet to try catching specific exception for if a files doesnt exist)[code]

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VS 2008 Check If The Firewall Is Off?

Dec 29, 2009

How can i make a program to check if the firewall is off.And if the firewall is off how can i turn it back up again.

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Check If Someone Has UAC On The App Or Put That Firewall Thingy On The Button?

Apr 24, 2010

I saw the other day in an application there is a Shield sign on a button then when i click it if i didnt Run As Administrator firewall asks me to give it admin....anyone knows how to do it? i really need it for file associate function because it requiers admin rights .

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Code To Check Database Exist In SQL And Message Box Show Database Exist Yes/NO?

Apr 23, 2012

I want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?

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How To Check The Exist Value

Jan 17, 2009

Using VB.Net and Sql Server I want to check the user Entry Value.The User is entering the code in the textbox, before saving to the table, i want to check whethere code is already exist in the table or not.

Tried Code

cmd = New SqlCommand("Select code from table where code = '" & textbox1.Text & "' ", Con)
dr = cmd.ExecuteReader()
While dr.Read()
End While

If value is exist, then message to the user "Already Exist" other wise save to the table.

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C# - List Of Exceptions That CAN'T Be Caught In .NET

Sep 12, 2011

What is the list of exceptions that CAN'T be caught in .NET? Or where can I find such a list?

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Exceptions - Can The "Throw" Statement Exist In A Block With No Try/catch Statement

Oct 5, 2009

how to use them then before, but am still a little confused with a few aspects. Here goes:

1.) Lets say you have a method that checks for a certain condition(s) and if it fails Throws an exception. Does it have to be in a try/catch block? Meaning can the "Throw" statement exist in a block with no try/catch statement?

2.) Now lets say we have a method that has a try catch block and in it there is a throw statement. When the throw statement is executed does it first try to find an appropriate catch block in the same method or does it immediately go back to the calling method without looking at the catch statements in the current method where the exception was thrown?

3.) I created a custom exception class that inherits from ApplicationException. Next I created a method which has a catch block that catches this type of exception and does some action. Is the System(i.e CLR) smart enough to throw an exception of this type, or does it only throw exceptions from SystemException?

4.) I know that some people are more liberal in their use of exceptions and others use it more sparingly when truly strange stuff happen like the DB going down. I am writing code where I am getting some info back from the database, converting it and then storing it. Sometimes there might be data that comes back from the database and other times the field is empty and the Null value comes back. Therefore in the instances where Null comes back from the database I should not convert the value to anything, since I will get an error. What should I do in this situation? Should I let the CLR throw the exception when it goes to convert the Null value or should I check for the Null value and if it exists not convert?

5.) In general when I throw exceptions, is it sensible to only throw exceptions of the type Application Exception or are there instances where the programmer throws exceptions of the type SystemException?

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Check If ANY Folders Exist?

Nov 17, 2009

I want to check inside a dir if any folder exists. Every way I found is to check for a specific folder with name as string. I want something like

folderExists = My.Computer.FileSystem.DirectoryExists("C:TestDirectory*")

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Check If File Exist On The Web?

Jun 21, 2007

how do i verify a file like a image or html exist on the web?

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Check If Ftp Directories Exist?

Nov 18, 2009

i am having a problem in writing the code that checks whether a directory exists or not in FTP using vb.net..

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Check Regedit If Key Exist?

Jun 21, 2010

I had it working at one point now it does not want to work. Im checking the registry for a subkey and I know it exists but vb is telling me it doesnt, which is driving me up the wall, this is what I got[code]...

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How To Check If The Data Exist

Sep 8, 2009

This code works. i insert 3 string and then check if the database already save this code.if the first string does not exist it works well.but when 1 string "already exist" or found in the DB, all of the next string say its already in db even though it haven't. what should i do?

For count = 0 To strArr.Length - 1
If strArr(count).Contains("=") Then
str1 = strArr(count)
coun = str1.IndexOf("=")
str1 = str1.Substring(0, coun)

[Code]...

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How To Check If Username Exist

Feb 14, 2012

i'm using mysql database, what codes for check if username is already exist this for creating username and password ..

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Find The Full List Of .Net Exceptions?

Aug 15, 2009

where can I find the full list of VB.Net Exceptions? I saw one similar question in this forum, but couldn't find the answer.

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Check Exist Ou In Active Directory?

Mar 5, 2009

I try to integrate Human Resource DB to Active Directory.Once I use sql ,getting all person and department and then write to ad.but if a department built new how to check is exist or new in active directory,also person also computer.

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Check If A Function Exist In A Class In Vba

Oct 21, 2009

the way i could use VBA to check if a function say function1 is present in class1. if the function is present display 1 else display 0.

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Check If A Letter Exist In A Word

Mar 3, 2010

My question is how to check a letter exist in a word. For example this word: 'computer' and I give in a textbox letter 'a' then the result will be false because 'computer' doesn't exist a letter 'a' else if I give letter 'c' the result will be true because computer has a 'c'.

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Check If An Object Exist In A GroupBox?

Jan 5, 2012

How can I check if an object (in this case my object would be a ButtonBox) exists inside a GroupBox but in a exact location.

Something like this :

If Groupbox1.NameOfButtonBox.location(40,190) exists then
Do my code
end if

I know the syntax is completely wrong but it's just an example

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Check If Data Already Exist In Registry Value Or Not

Jan 22, 2010

I created a form with a checkbox and my purpose is if data have already existed, the checkbox will show a check when it launch however i am very new to VB( First time actualy). i google to find the answer but the best solution just tell me to use RegQueryValueEx, unfortunately,i don't know axactly how.

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Check If Item ID Exist In The Database?

Jan 25, 2009

what is the fastest way to check if Item ID exist in the database?

From what i have done, i have an excel file uploaded to datagridview, then each itemID is retrieved line by line, then accessed the database to check if ItemID exists.

Is there a way to retrieve the whole column of itemID and then query it to MSSQL2000, then display the itemIDs that does not exist.

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Check If Record Exist In Ms Access?

Aug 15, 2011

Im using Microsoft Visual Studio 2010

Microsoft Acess 2010

This is for practice

Lets See First off i was able to get to insert records(Code Below)Now im trying to get the program to prompt a message when the id or field exists on the key down event and not enter it if it exists and if it doesnt exist im guessing i could use my already existing code to insert it[code].............

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Check If Row Exist At Position In Datatable?

Jun 4, 2011

i have a code where I dynamically generate the columns name and bind it it datatable. now I am iterating thru loop for each column and fill the datatable. My Problem is when I fill for first column row is already added to the position(e.g 0,1). if row at some position already exist in datatable I should not write

dr = dt.NewRow()
dt.Rows.Add(dr)

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How To Check Data Is Already Exist In Database

Jul 5, 2010

how to check the data is already exist in database using vb 6.0Naren

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How To Check If Certain File Types Exist

Mar 29, 2010

Is there a way to check if certain file extensions exist within a directory?

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How To Check User Entry Value (If Already Exist)

Sep 29, 2011

Using VB.Net and Sql Server. I want to check the user Entry Value. The User is entering the code in the textbox, before saving to the table, I want to check whether code is already exist in the table or not.

Tried Code
cmd = New SqlCommand("Select code from table where code = '" & textbox1.Text & "' ", Con)
dr = cmd.ExecuteReader()
While dr.Read()
End While

If value is exist, then message to the user "Already Exist" other wise save to the table.

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VS 2005 Check Whether The File Exist Or Not

Nov 9, 2009

i 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].....

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