Create A Function To Return One Database Row In A Collection
Mar 4, 2011How would I create a function to return one database row in a collection, such that the rows column name & value are stored as key/value pairs in the collection?
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Saving Items In A Collection To A Database Using A Loop Function?
May 12, 2011I would like to be able to save to a db and send task to email or as text msg for instance nevermind that.. I have two variables of type ArrayList they are "_mList1" , "_mList2" and "_mList3"
_mList1 stores the list of Telephonenumbers , _mList2 stores the list of StaffIDs and _mList3 Some concatenated string.
theses variable lists will hold some data in runtime as explained and i would like to use them to populate a DB table again mentioned
tblTask (TaskID(PK), Action, StaffID(FK), AssignedBy, TelephoneContacted, NotesCotent)
tblStaff (StaffID(PK), FirstName, Surname, Telephone, Address etc..)
[Code]....
Function To Return Value From MySQL Database?
Dec 26, 2010Trying to build a module of set procedures to call on in my day to day projects.Here is a function I use to get a Value in MS Access.I have functions like this below stored in a Module in all my projects. So I can easily call on them to Return i.e. a value from a database etc.
Username = dataaccess.Getvalue("Select Username from Users Where Username='" & txtusername.Text & "'")
Function Getvalue(ByVal query As String) As Object
Dim cmd As New OleDbCommand(query, dbconn)[code]......
Using LINQ To Return Element In Collection, Would Like To Return Nothing If Element Not Found?
Mar 3, 2011I would like the following function to return Nothing if the element with the specified key is not in the collection. Instead, it returns an error - something to the effect of "no element found"
Public Class MyCollection
Inherits System.Collections.ObjectModel.Collection(Of MyType)
Public Function FindByActivityKey(ByVal searchValue As Integer) As MyType
[code]....
Is There A Native LINQ Way To Return A Typed Collection
Apr 18, 2011Is this the most straight forward way to return a typed collection?Here's the key line of code which returns a implicit type of IEnumerable that used to manually loop through to manually recreated a TYPED collection. Is there any native LINQ way to return a typed sorted collection without this recreating of the collection? [code]
View 2 RepliesReturn Type For Collection From LINQ Query?
Oct 15, 2010I have a method, that returns a group of accounts
Public Shared Function GetAllNotesByUser(ByVal UserID As Guid) As Account (??)
Using db As New MyEntity
Dim query= (From A In db.Account _
[Code].....
I would then like to pass this to another function to calculate the totals for all the accounts in the collection. Is it best practice to return an Ienumerable, a generic list, I'm just not sure what works best with LINQ and the entity framework.
Return An (Anonymous Type With A Function) From A Function?
Mar 3, 2011Just 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)
Return A Collection Of Child Nodes From A Treeview Node?
Jul 17, 2010way to return a collection of treenodes which are children of a selected node? I can't find on MSDN a object of treenodes that is a collection of childnodes.
I have two treeviews, and I am writing code that will copy treenodes from one treeview to another treeview if it is selected. If a parent node is selected, I would also like to copy over all the children. If it is just a childnode, then I would like to copy just that.
Here is what I have so far.
Dim treeobj As TreeNode
treeobj = TreeView2.Nodes.Add(TreeView1.SelectedNode.Text)
If TreeView1.SelectedNode.Parent.Index.ToString Is System.DBNull.Value Then
[Code]...
VS 2008 Return Listview Item Collection In Multithread?
Aug 31, 2009I am doing this within a thread:For Each item As ListViewItem In lvUsers.Items and I am getting: Cross-thread operation not valid: Control 'lvUsers' accessed from a thread other than the thread it was created on.I have been able to adjust a control in a way using something like:
Public Delegate Sub ListAddNameInvoker(ByVal text As String)
Public Sub ListAddName(ByVal text As String)
If lvUsers.InvokeRequired Then
[code]....
But how do I get data from a control and pass it to another thread?
Setup A Customer Collection Class That Has One Function?
Jan 15, 2012I am having trouble setting up these classes.I need to set up a customer collection class that has one function GetCustomer(ByVal customerNumber As Integer) As Customer..The customer class reads a file and returns 5 fields and x number of records.My question is do I set up the 5 properties (fields) in the Customer class and if there are 10 records that match how do I return the customer object to the customer collection class. I don't care about exact syntax but could someone show me how these 2 classes should look?
View 2 Replies.NET Function Return Value?
Jun 15, 2011Possible 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 RepliesFunction Does Not Return Nothing?
Feb 12, 2010take 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
Get A Function's Return Value?
Jan 14, 2012In the documentation of FileInfo.Create Method it says:
'Declaration
Public Function Create As FileStream
'Usage
[code].....
How To Use A Function's Return Value
Mar 8, 2009So 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?
Return More Than One Value From A Function?
Mar 1, 2012One 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].....
Return More Than One Value From The Function?
Jun 2, 2009how 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]...
Return NaN From A Function?
Oct 5, 2010I'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].....
Return Value Of A Function?
Apr 14, 2009I get the below warning [code]...
To solve it I put a return statement "Return 1" in the code.
Datatable Object Within Class Function + Garbage Collection?
Oct 6, 2009Datatable object within class function + garbage collection?
View 3 RepliesWhy Use A Public Property Instead Of A Function To Expose A Custom Collection<T>
Jul 6, 2009During a code review I looked at set of repository classes (in vb.net). I am used to seeing these repository classes full of functions that return collections (among other things) of your domain objects. However, this repository had 1 public property and 1 private variable that looked something like this:
Private _item as Collection (of Customer)
Public Item as Collection (of Customer)
Get...
Set...
In the "Get", there is code that gets a the Customers from the DAL and loads it in the private _item. What would the benefits be in using a property (customerRepository.Item) instead of plain old function (customerRepository.GetAllCustomers)? The "Property" way looks odd to me but odd doesn't always mean wrong.
.net - WCF Function Won't Return Stream?
May 11, 2011So 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]...
CLR - 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 RepliesFunction Doesn't Return A Value?
Feb 18, 2012[code]i want to change password for the users [code]
View 14 RepliesFunction To Return Array?
Aug 5, 2011Before 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]...
Function Without Return Type?
Dec 23, 2010In 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?
Function Won't Return An Array
Jun 1, 2010I'm trying to write a function that returns an Array that I can pass into a String.Format[code]...
View 3 RepliesHow To Get 2 Return Values In One Function
Mar 26, 2012i 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 RepliesNo Return Keyword For Function In .NET?
Aug 5, 2011I'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
No Warning In .NET When Function Has No Return?
Feb 25, 2010warnings 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.
Return A String From A Function
Jun 27, 2012I 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?