I'm trying to return an object from a function. E.g. Ive got a function populateDog that returns Dog. So in my aspx class I want to be able to be able to pass in Lassie as the name of the dog(I have a dog class) and have the function return the object with the data it populated. [Code] The idea was to have a database and I would eventually pass in an ID to query results and return it.
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I'm needing to go through all the controls on a page, looking for a specific one. We've got a bunch of user controls, a masterpage, content panel, &c.
The basic idea is simple, but once I find the control I want, say five 'layers' in, the control is returned only one level.
I know I can do something cheesy like having a private variable and assigning the control to that down in the rabbit hole, but I figure there must be a more official method of doing this.[code]...
I'm working up a system where I plan on using RealProxy objects to enable intercepting method calls against a set of objects, handling the call, and then returning appropriate results. This works just find for simple return types like strings or ints, but I can't seem to return objects from the RealProxy.Invoke method. Everything works. I get no errors, but the returned value is always NOTHING, instead of an object.
I've worked up the smallest sample code I could, and have included it below. Essentially, just call RPtest and single step through. The code creates a simple object, RPTestA, with a string field and an object valued field It then retrieves the string
[Code]...
I've got a f(x) that returns a collection of user controls. .Net lets me just treat the f(x) name as the collection.
ex)
Private Function GetCcB() As Collection(Of Reports_ucColumn)
Dim cc As New Collection(Of Reports_ucColumn)
cc.Add(Me.ucColumn0)
[code].....
Just so it's known, this question is mostly academic, even though I tried to use the concept in a real-world solution. I realize the example is contrived, but I believe the concept is valid.I want to write some fluent code like this:
[code]...
I realize that I can't force an anonymous type into a specific type (like implementing an interface or some other class), and I don't want the overhead of defining a specific class just to match my desired fluent name with the actual method name. So I was able to make the code work like this:
copy(my_first_file).to.Invoke(my_second_file)So there is no IntelliSense or type awareness there, and I have to include the Invoke in order to have the method run. How can I get more type safety and exclude the Invoke method, under these constraints: Anonymous Type returned from Method No additional classes or interfaces Preferably, I do not want to pass in another parameter to the copy() method that tells what type to return, unless copy becomes a generic method (but I think that means defining another class/interface, which I don't want to do)
I have an interface that describes an specialized list in my application...
[Code]....
Is there a way to make an interface serializable, or am I going to have to convert each of my objects into a concrete class implementing the interface, and then return that class?
After reading all the examples for list of T exists and Find and find first, none show how to handle multi-property objects. Below is bare bones example maybe someone could flesh out to show how this should be done.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim DatePriceList As New List(Of DateAndPrice)
DatePriceList.Add(New DateAndPrice(Date.Parse("1/1/2000"), 10.12))
DatePriceList.Add(New DateAndPrice(Date.Parse("1/2/2000"), 11.12))
[Code]...
I am working on a application that has quite a few functions involved and have been thinking of the following: If I have a function that has a few paramaters, is it more efficient to pass the objects to the function(Example 1) or reference the objects in the parent(Example 2)? Does it matter if the objects are large or not?
Example:
Class mainform
Public myGenericList As New List(Of String)
Public myDatarowArray() As DataRow
[Code].....
I call the function GetDataTable and when it gets to the return line, I get the error message: Object reference not set to an instance of an object.
Dim DB As New DBConn
Dim gd As New DataAccess.GetData
Dim DT As New DataTable
[Code].....
Updated. I'll see if I can update with the DataAccess.GetData code. I didn't originally put it in there because our shop use it all the time and have no issues with it.
Possible Duplicate: VB.NET Function Return If I have a function that returns a boolean, what is the difference between:Return False and Function = False
View 2 Repliestake a look at the following Code:
Private Sub btnDebug_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDebug.Click
Dim d As Date
[Code]....
The Funtion ZZNull always returns Nothing, so IsNothing(d) in the calling method should evaluate to True.
But it does not !
When you run these lines, then you will see that IsNothing(d) evaluates to False
In the documentation of FileInfo.Create Method it says:
'Declaration
Public Function Create As FileStream
'Usage
[code].....
So the program I am writing validates the controls on the page on button_click.
I want to write a function which checks which step the program is at (0-7) then return something depending on whether or not it validated.
My plan was to return the control which was not valid.
Private Function ValidateInputs() As Control
Select Case wizardStep
Case 0
[Code].....
1. could I return the names off all the controls which did not validate?
2. should I be returning a control type or would something like a string be better?
One over time hours and one week's pay @10 hourly pay. I wanted to display those two in two listboxes 1 and 2.
Public Class Form1
Dim overTimeHours As Double
Dim weekPay As Double
[Code].....
how return four value from a function. In general function will return single value but here i am going to return four different values. If possible please tell me how to store the function return values.
[Code]...
I've created my own version of HexToDec() to properly handle the negative flag. I saw other versions online that used "Not(value)" to do the Pos/Neg inversion, but that does not generate the proper value... No, it's not the most elegant my any means. But I couldn't find anything online that actually worked.
Long story short, I want to return NaN in the case that the function is passed a string that is not a valid hex string...
How do I do that? Everything I've tried generates a compiler error... (assign return value to double.nan, assign return value to non-numeric, etc)
Existing function is below:
Function HexToDec(ByVal hexStr As String, Optional ByVal signed As Boolean = False) As Long
Dim lngFinal As Long
[Code].....
I get the below warning [code]...
To solve it I put a return statement "Return 1" in the code.
I have a WCF service wich has this function:
[Code]...
wich returns the values specified here:
[Code]...
Each one of this functions returns a List of entities. If I call this functions individually they return their values ok. But what I want is to make only one call to the service and no several! I want to be able to receive it in another application like this:
[Code]...
I'm connecting my program to some external code. I'm setting it up so that the external code can instance objects and I've come across a problem. I've created this function here:
[Code]...
I'm trying to create a System.Diagnostics.Process object. For what ever reason though, it always return Nothing instead of the object. Does anybody know what I'm doing wrong? I'm doing this in VB.net so all .net responses are accepted :)
So I have a function which returns a pdf stream. The calling procedure gets the stream and writes it to disk Normal VB code is as follows:
[Code]...
I'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 Replies[code]i want to change password for the users [code]
View 14 RepliesBefore adding rows to a table I am evaluating the SSN number. These will later be flagged for correction so I am setting a datatable column to true or false if it passed muster or not.
I wrote a function to check the number and make the determination plus pad it with zeros and hyphens where they should be. My problem is I want to return the results in an array. I am getting system.string[] as the return value.[code]...
In my project (which I inherited from someone) there are a lot of functions like:
Public Function DoSomething(ByVal s As String)
' Do something to public properties
End Function
And they are called like this:
DoSomething(s)
So the return value is ignored (which is object, as I see in the docs). Is it safe to change all these functions to Subs? Could I break something which isn't so obvious?
I'm trying to write a function that returns an Array that I can pass into a String.Format[code]...
View 3 Repliesi want to get two output values in one Function is't possible ?i am just using String data type and split the values.but have any other easy way to get two output values actually i want to checking a folder how many jpg files are Horizontal and vertical [code]finally i split the values with "|" character.have any other options to get two values as separate in one functions.i have no moew idea about Dictionary,
View 2 RepliesI've been doing some code review and this code seemed weird to me since it doesn't have any return statement:Protected Function AddZero(ByVal vsInput As String) As String
If Len(vsInput) = 1 Then
AddZero = "0" & vsInput
Else
AddZero = vsInput
End If
End Function
warnings got me thinking about old issues that always goofed me up when I was writing more VB.NET code.One of them was the fact that the compiler didn't warn if you declared a Function but never did an explicit Return statement or assign to the Function name. Running Visual Studio 2008, I just made a small experimental project, and it seems as though the behavior has never been fixed.I created a Visual Basic Console application, with the following code:
Module MainModule
Sub Main()
Dim test As Boolean = TestWarning()[code].....
I also went into the Project Settings and turned On Option Strict and Option Explicit.I also set the Warning Configurations so that "Function/Operator with no return value" was set to Error.I compiled the project and got no warning, and no error on the TestWarning() Function. This seems like a great place to put a warning, because it will default to False, and you may have simply forgotten to do a return. C# will error without a return statement. I thought that VB.NET did the same thing with the "Function/Operator with no return value" configuration. Is this a bug, or is there something I'm missing?
Edit: Further Experimentation
Function TestWarning() As Boolean
If DateTime.Now.DayOfWeek = DayOfWeek.Monday Then
Return False[code].....
If, and nothing in the Else, there is also no Warning/Error. It will simply take the default, even though you likely intended (via programming style) to have an explicit return. In this case, I explicitly returned False (which is the default for Boolean), so it's likely a hidden bug that I should have returned True in the Else.
I have a class in this class i call a function which should return some string the class connects to an ftp server and list the directory and returns the filenames of the dir.
Code:
Public Function GetFileList(ByVal host As String, ByVal username As String, ByVal password As String, ByVal currentdirectory As String) As List(Of String)
Dim oFTP As FtpWebRequest = CType(FtpWebRequest.Create(host & currentdirectory),
[CODE]..........
So this should return all filenames of that directory
like:
Data1.xml
Data2.xml
Data3.xml
Now i have a form with a listview where i want to call this function and get the files of the "olist"
Code:
Return oList
HOW CAN I DO THAT? i mean how would my sub look like on my form where i want to call that function?
I want to return an array from a function.dt is a DataTable that is global
HTML
Dim dr As DataRow
For x As Integer = 0 To adoc.GetUpperBound(0)
dr = ds.Tables(0).NewRow()
[code].....
I'm definitely missing something here. I am trying to return an array forn the sql statement, chich I can reference as abom() in the original source.The ultuimate goal is to manually populate dt.
