Catching Errors And Pass To EventLog Function?
Nov 28, 2009
Any example to catch errors and log them to the Eventlog? I would like to catch any error and pass them to my WriteToEventLog function. If I use On Error , how could I catch the Error and pass it to my WriteToEventLog function? I would like to catch the actual error
Public Function WriteToEventLog(ByVal entry As String,
Optional ByVal appName As String = "CompanyName",
Optional ByVal eventType As EventLogEntryType = EventLogEntryType.Information,
Optional ByVal logName As String = "ProductName") As Boolean
[Code] .....
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Sep 28, 2009
I'm just curious as to which one of these 3 error syntaxes in the try/catch is right.
vb.net
try
Catch ex As Exception
MessageBox.Show(ex.Message.ToString())
MessageBox.Show(ex.Message)
[Code]...
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Oct 11, 2011
I have developed a windows forms application in vb.net 4 which connects to a MSSQL database. I have used the built-in tools to add the data source, data connection and data set. (Data->add new data source-> etc.) The application is installed on staff laptops which may or may not have network connectivity and may or may not be able to access the server on which the database is held. Obviously this is causing unhandled errors when the program starts and tries to make a connection to the database. (using windows credentials) Does anyone know where in the code the connection is made so I can go in and add some error handling? Or any settings I can change to get visual studio to handle the errors nicely?
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Dec 8, 2010
I have an app the writes to the eventlog correctly in xp. The code does not work in win7.
CODE:
I get an error about inaccessable logs:security. I get that. Run as admin it goes away. I do not want to have to do that every time for every user that runs the app. besides they may not have the rights
So I wanted to make an instance of eventlog and set the Log to write to so it does not search the logs and error out on security.
CODE:
Now i get warnings about "Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated."
How the hell else are you to set the log so that the code will work under win7 with normal user rights AND not get this silly warnings?
I have 71 places that I write to the eventlog. that may or may not be too many but that is for another thread.
CODE:
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Oct 12, 2011
I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?
I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)
What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.
I have just started using VB, and from what I have found so far it seems like the tools you have is
- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function
As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.
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May 28, 2012
I want to make a GetAllContacts method which takes a sort parameter of type Func(Of Contact, TKey) which is the same type that the OrderBy method for an IEnumerable(Of Contact) takes.[code]"Too many arguments to extension method 'Public Function ElementAtOrDefault(index As Integer) As Contact' defined in 'System.Linq.Enumerable'." on the second parameter.
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Mar 30, 2012
Im a student doing an assignment, how do i pass the value from a sub procedure to a function procedure....i want to pass the value from decSubtotal to a function procedure named CalculateDiscount; check out my code--
[Code]...
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Apr 27, 2010
I have a bit of a problem with the following bit of code. Basically the last line (Return Write...) is giving me the error 'Expression does not produce a value'.[code]...
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Sep 1, 2009
I have a WCF Service Function that Returns a typed dataset. How can I return an error or message to the client?Public Function ReturnMyDS(Byval Identity as Integer) as dsMyDataSet Implements Iservice.ReturnMyDS
Try
Return = RetrievemyDataset
Catch ex as exception
[code]...
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Jun 18, 2010
I am having issue with this function where wait_rtn statement does not work and errors out with error 0. it is suppose to search the screen and if it finds (true) get out of the loop...
[code]...
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Dec 9, 2009
I have a statement:
dat.XoaNhanVien(Me.dtgcapnhatthongtin.CurrentRow.Cells(1).Value, message)
That is a function for deleting info. Now I want to create other function and get above function to parameter. I mean:
Public Function func(Byval func as " What type can be ?")
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Nov 20, 2009
I want to pass the entire array to the next function[code]...
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Sep 14, 2011
I'm trying to pass 2 bitarrays to a function that ANDs the bitarrays and returns the count of bits that are set to TRUE. However, something strange happens when I reference the bitarray from within the function and the results are non-sensical.
So I have output the bitarray contents before it is passed to the functionand they match the source data, then I output the contects of the bitarray from within the functiona and they are completely different.
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Mar 6, 2009
I'm working on a VB.NET DLL right now, and one of the functions I'm writing is supposed to take a file, and clip out an array of bytes (the method I've got works, and can be abstracted away here). What's the best way to pass a file to this function? Would passing a filename to it be best, or what would be the best way to accomplish this?
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Dec 20, 2011
I'm trying to give a default value to the register property method. This required a function, but passed as an object(delegate?).[code]....
I want to call that registerproperty method, but I don't know how I can do that in VB.net. I just need to pass along a new Person object and I thought this was the way to go[code]....
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Jun 10, 2011
I just want to ask if it is possible to create a function that accepts an expression into its arguments. Just like what IIF do. Ex: Dim strResponse as String = IIF(Msgbox("Select Yes or No", vbYesNo) = vbYes, "Yes", "No") I forgot the code, but its the thought that counts.
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Jun 27, 2012
The is a calculate function for example Function Calculate (Byval v1 as integer, Byval v2 as integer, byval op as ????????) as double return v1 op v2
End Function Anybody tried this?
I don't want to use functions for every operation (multiply,divide, etc.). I wanna pass a operator same as I pass the values. How come nobody ever had this need in VB? Using enums could work but still...
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Jun 12, 2009
i need to pass array value to a function , here are the details
function MyTest(byval a as integer, byval b() as string)
if b is nothing
msgbox("no array")
[Code]......
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May 18, 2009
I have an array of integers and I want to pass the array to a function that will add up the elements of the array and return the cumulative total of the elements of the array. So, if the array contains the values {1,2,3,4,5} the return value from the function would be 15.
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Aug 27, 2011
The code below is used in a Linq to SQL solution, and is in the Load event of a form. It works fine to display an ordered list of people's names, and set the value member to that person's ID. However, I'm going to be using these 'people' comboboxes a lot, so I'd like to put a sub into my Utility code there is only one line in the form's Load event.
I want to call something like: Call ComboboBoxPeople(cbo, tblTurnbackMain, ReportedByID)
The sub would begin like: Public Sub ComboboxPeople(cbo as Combobox, tbl as 'sometype', fld as 'someothertype')
What can I use as the parameter types for tbl and fld?
[Code]...
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Dec 5, 2011
if this is a dumb question. I don't ever have to write anything in VB.NET.But I am passing variables named "name" to a function and sometimes it may be 1 name or 2 names, etc. I want to check in the function if its only 1 name don't add a comma, if it's 2 names add a comma. Is there a way to get how many "names" there are?
EDIT: Added my ode to make my question a little more clear. sorry for not doing it before.
My Code:Public Function GenerateCSV(byval str as string, byval str1 as string, byval str2 as string, byval GrpName as string)
[Code]...
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Jul 21, 2010
I have Listview which databound to Dataset with about 20 items per row. I have a function which executes on each ItemTemplate appearance and gets about 10 params from Eval("something"). So basically one function builds and image from 10 parameters.Instead of passing 10 Eval("something") to the function is it possible to pass it whole row and how to use this row inside of function because it is not simple DataRow or ListView row which i can access as array of items (datacolumns).Reason i do that because function looks ugly and each time i need to change it i need to deal with dozens of items.
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Mar 3, 2012
Im having a very difficult time trying to pass an vba array ive built from ms- access vba to a .net function.I don't have a com problem I can reference the library just fine from vba but and i can call a simple function from vba. however my problem exist when i attempt to try to pass an array to the vb.net function. vb.net code
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Feb 8, 2010
Can we pass parameters to a function using delegates
Private Sub UpdateLabel(byval text as string)
If Me.Label1.InvokeRequired Then
Me.Label1.Invoke(New MethodInvoker(AddressOf UpdateLabel))
Else
Label1.Text = text
[Code]...
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Jul 8, 2009
I have a variable that I am trying to get to iterate up by one, i.e. X starts at 0 x+1 on first pass thererfore its at 1 then x+1 on second function call therefore x=2 and so on. I've tried the different loop and for commands but I cant get one to stay until the next function call, does it need to be a global variable? I'm sorry if this is in poor form or improperly formatted, definently trial by fire going into the object oriented world.
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Oct 1, 2011
I'm trying to pass a callback function from a C++ dll to a VB.NET application.Here is my current C++ code :
void DLL_EXPORT registerEvent( void (*callBackFunction)(string str),string str)
{
callBackFunction(str);
}
void test(string str)
[Code]...
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Mar 23, 2010
Can I pass a form as a parameter in a sub like public Sub GetData(Byval Frm as form) and access its controls?I have few forms (you can say: FrmAccounting, FrmEngineering, FrmIT) with almost the same controls in each of them (txtEmployeeID, txtEmployeeName, optMale, optFemale etc), where no two forms are open at same time, and each of those forms have a Button which opens a new Form (you can say FrmCollectData) now I want to fetch data in FrmCollectData depending on which form it was opened from.. like if user was on FrmEngineering and it clicks button to open FrmCollectData.. form collectData fetches data from FrmEngineering Controls and if user was on FrmAccounting and it opens FrmCollectData, form Collectdata fetches data from FrmAccounting..
earlier, in VB6.. In one of the Sub written in frmCollectData I checked which form is opened by setting flags in each of forms (frmEngineering, frmAccounting etc) and then I passed the same form in a sub which writes data in frmCollectData controls.. but am not able to do the same in VB.NET.
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Dec 11, 2010
Okay so what im trying to do is make a simple particle system in VB (Yes i know this isnt a ideal setup). Im going to have particles dieing and spawning new ones tho, To do this i need to be able to pass a function to the particle when its created then call that function when it dies. Is there a way to do this by passing function pointers?
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Oct 29, 2010
I have a multidimensional array (not jagged array) that saves data from rows and columns of an excel spreadsheet. After it completes recording the data from Excel, I need to pass the array to another function.I understand how to pass a jagged array, but not a true multidimensional array.
Can someone point me in the right direction? I've done some searching on this site, and others, but most of the info only includes single dimension arrays or jagged arrays.
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Dec 18, 2009
I don't think I fully understand passing values from a sub to a module. Here is what I'm trying to do (problem is at the '****):
[Code]...
I think I've seen something like this before - where the actual function returns a value. Is this possible? Or would I have to pass an integer variable from the sub to the function, and then return it back to the sub?
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