Can .NET Operator AddressOf Return Nothing In Any Case
Sep 20, 2010can VB.NET operator AddressOf return Nothing in any case?
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.Net CodeDom - Create Delegate With AddressOf Operator Equivalent?
Apr 25, 2011Is there a way to create a delegate instance in .Net using CodeDom? I want to generate something which looks like the following:Dim myDelegate As someDelegateType = New someDelegateType(AddressOf implementingMethod)Below is more info on the context...Original Question:I am using CodeDom from the .Net framework (v3.5 if it matters) to generate a class. One of the classes defines a delegate method which in VB.Net looks like:Public Delegate Function filterByIdDelegate(ByVal obj As Object, ByVal id As Integer) As BooleanI then have a method which will provide the implementation:Private Function filterById(ByVal obj As Object, ByVal id As Integer) As Boolean Return (obj.ID = id)nd FunctionHere's the problem; how do you create an instance of the delegate (using the equivalent of AddressOf for VB.Net)? I am currently doing this (<filterByIdFunctionName> is a string holding the name of the delegate function, `' is the name of the delegate field):
Dim getFunction = New System.CodeDom.CodeMemberMethod()
With getFunction
'Declare delegate instance
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Link Dynamic AddressOf Operator To Their Separate Event Handlers?
Oct 2, 2011I put several buttons dynamically on a form, and then try to link them to their separate event handlers with the following (simplified) code:
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.net - Refactoring Of Case Statement And Dynamic Operator?
Jun 4, 2012I have a case statement which compares data by getting parameter such as "eq,ne,gt,..." and so on. Actually this method will filter data by getting filter parameter and filter value. How can I refactor below code?
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Case (in) Sensitive Comparison With Operator In Runtime (without Option Compare)
Jun 24, 2011Is there anyway to use LIKE operator in VB.NET as case sensitive or insensitive during runtime? For example use a flag to do case sensitive or insensitive comparisons.Obviously this can be done by simple converting them into lower case and forcing application to Option Compare Binary but maybe there is a better way to do this?
View 1 RepliesCLR - Function/Operator Without Return Value?
Sep 4, 2009I've create a new project, and set treat all warnings as errors in the compile tab.All the other warnings seem to be treated as errors, except the one which I'm interested in "Function/Operator without return value".I have a simple function within a class, which does not show an error if I do not add a return statement to that function. I have read in many places that VB.Net returns a "hidden" default value if the returns statement is forgotten.My software went out to production where an overloaded function was missing a return statement, which wasn't highlighted due to the above.
View 20 RepliesAccess Database And Using A Parameter Query With The LIKE Operator To Return All Rows That Match Query?
Apr 28, 2010I am connecting to an Access database and using a parameter query with the LIKE operator to return all rows that match query. The string to search for is taken from a Textbox
sql =
"Select * FROM Allview WHERE Info Like" &
"*" &
CStr(TextBox1.Text) &
"*"
The query does not return any data in vb, but when run from access with same string, there is data returned.The connection to the database is done correctly, as I am able to return data with various other queries.
Partial code :
Dim
con As
New OleDb.OleDbConnection[code]....
Read Upper And Lower Case Letters Without Having To Put The Upper Case Letters In Select Case Statement
Oct 28, 2009i have a program using a select case to convert letters to special charaters. My question is how can I get the code to read upper and lower case letters without having to put the upper case letters in my select case statement. Example: Part of my code is
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Type Upper Case, Lower Case In Textbox
Dec 15, 2011i want to the textbox that when I start to type in names it should be like this Camille Aisha Cordova, How do I do this?
View 16 RepliesUse Upper-case And Lower-case Letters As Well As Numbers?
Oct 27, 2010Im using a Random Pool number generator and was wondering how i can make it use upper-case and lower-case letters as well as numbers here is a pic
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Error: Option Strict On Disallows Operands Of Type Object For Operator '='. Use The 'Is' Operator To Test For Object Identity
Jan 27, 2010I am tightening up my coding with the Option Strict set to ON. It has now produced alot of errors. An example of this is:
If AllocatedDGV.Rows(i).Cells("RoomNumber").Value = RoomsAvailableDGV.Rows(j).Cells("RoomName").Value Then
It gives me the following error: Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity.
Option Strict On Disallows Operands Of Type Object For Operator Use The 'Is' Operator To Test For Object Identity
Apr 6, 2012I need to write an interface to get data to/from our data files.
We have a low level class that holds field values for each record read from the files.
This just holds two values, the value read from the file (DBValue) and the updated value that may need to be written back to the file (CurrentValue).
These values may be any of the standard value types (integer, date etc) or a string.
Either value (DBValue or CurrentValue) may be null if not defined.
I have written the class to manage this data which works fine while option strict is NOT on.
But we have an office policy of having option strict on all the time.
When I put option strict on, my object value comparisons fail with the error: "Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity."
Question, how should I change the following code to handle option strict on ...
This is all running on Visual Studio 2010
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Coalesce Operator And Conditional Operator In .NET?
Mar 10, 2009Possible Duplicate: Is there a conditional ternary operator in VB.NET?
Can we use Coalesce operator(??) and conditional ternary operator(:) in VB.NET as in C#?
.net - Sentence Case Or Proper Case In TextBox
Jan 18, 2012I want my TextBox to make the text i enter as Sentence Case(ProperCase).. but i dont want to write any code in an event like Lost Focus or KeyPress
Just by default when ever a user enter or types in a textbox the first letter of every word should automatically converted into UpperCase
Using Sender As A Case In Select Case Statement?
Mar 21, 2006When my form loads it adds some handles (using AddHandler) to a sub (showStatus). What this sub does is checks which control activated the sub (using sender.Equals) and displays text in the status label (status) accordingly.For this I use an If...Then statement for each possibility. There are many possibilities and my code get cluttered. Is there a way to do the same thing with a Select...Case statement. I tried: Select Case sender Case tbOne : status.Text = "blahblahblahblahblahblah" End Selectwhere: tbOne is a textbox, status is a StatusLabelIt gives me an error though, saying "Operator '=' is not defined for types 'Object' and 'System.Windows.Forms.TextBox'."Any ideas on how I can get this to work with a select case statement?
View 13 RepliesVS 2008 - Select Case Not Catching The Case
Oct 20, 2009here is my code..
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If the result is 86 and it's mod by 43 the answer is 2 Case 2 is not firing. it just goes to the end of the procedure.
.net - If Case Statement Throws Exception "case Else" Start Working?
Jun 19, 2012It looks like impossible but...
Try
Select Case command
Case 1
smth()
Case 2
[code]....
Firstly Case 2 runs. Throws exception. And right after this debugger shows that next processed statement is Case Else. Only after Case Else throws own exception Catch block start working. I've never seen this trick. Why can this happened?I'm sure the block is entered once (not like this:first enter hit Case 2 and second hit Case Else).
Update:-To Matt Wilko. Thank you for answering. I've switch to Strict On in Options of VS2010 but nothing has changed. Command is variable, not function. Watch tool shows that on each step Command is the same ( Command = 2).
Fixed. Yeeaaaahhh. I simplefy code to
Try
Select Case 2
Case 2
[code]....
and change project to Console app. This works as I mention. The fix was in Release mode. I was debugging in Release mode. When I switch to Debug mode everything goes as it should.
How To Use Operator As A Comparison Operator
Nov 11, 2009I want to perform equality comparison in VB.NET and cannot get it to work. Error: value of type Boolean can not be converted to System.Drawing.PointF
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.net - AddressOf With Parameter?
Feb 4, 2012One way or another I need to link groupID (and one other integer) to the button I am dynamically adding.
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How To Store The AddressOf
May 2, 2012How can I store the address of a function so I can use this later in my code? I want to do something like this:vb
checkStatusWorker As addressof function= addressof functionName
.net - Addressof Syntax Without Delegate
Jul 8, 2011I am using this delegate to invoke my methode:
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.net :: AddressOf In Base Class?
Mar 16, 2011When referencing a method's address, should we take into account the overriding or not?
Class B
Inherits A
Overrides Sub Foo
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Calling AddressOf To Be Dynamic ?
Aug 11, 2010I have some code and just need the calling AddressOf to be dynamic
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filterer.FilterSite is the code that I need to replace each time with another method call.
EventHandler AddressOf Invoke?
Apr 22, 2011I wish to check the hard drive space used in a folder on a hard drive. This will happen continuously as a service, so it will be calculating the space used for thousands of folders all the time. I know that this code can be done easily in dotnet, but it seems to take a really long time. Are there any APIs to do this more efficiently, or does the entire looping process have to occur to do this check?
View 3 RepliesPassing Arguments To AddressOf?
Dec 25, 2010I'm currently using the code:
Public
ReplaceThread As
System.Threading.Thread<br/>
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Use Anonymous Delegate Instead Of AddressOf
Jul 16, 2010Is it OK to use anonymouse delegates instead of AddressOf?
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'AddressOf' Expression Cannot Be Converted To 'Integer'
Oct 13, 2009im converting a vb code to vb.net from simpleocr site but i can't run this code because of error in sub calling (ret = objOCR.OCRSetOutputHandlerX(AddressOf myOutputHandler)) :
Code:
'AddressOf' expression cannot be converted to 'Integer' because 'Integer' is not a delegate type.here's the code:
Code:
dim strOCRResult as string = ""
Private Sub DoOCR (filename as String)
Dim objOCR as SimpleOCR 'SimpleOCR object
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'AddressOf' Expression Cannot Be Converted To 'Integer'?
Jan 23, 2011im converting a vb code to vb.net from simpleocr site but i can't run this code because of error in sub calling (ret = objOCR.OCRSetOutputHandlerX(AddressOf myOutputHandler)):
Code:'AddressOf' expression cannot be converted to 'Integer' because 'Integer' is not a delegate type.I googled around but i did not found any solution here's the code:
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AddressOf, Delegate And Upgrade Code From VB6?
Jan 17, 2012I am converting some VB6 code to VB.Net - specifically callbacks.VB6 code in Form_Load:
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Can't Convert A Delegate (from AddressOf) To A Long?
Feb 19, 2009I am using the EnumWindows API Call, and I've looked at an API website. It can't convert a Delegate (from AddressOf) to a Long, so I made a delegate type for it. (Uh-oh, already.) I need to know something that will take the returned IntPtr and get the window title, so I can activate it with another API call and send some keys.
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