Read An Object To An Array List?
Jun 10, 2009i need to read an object to an array list. where i can get in depth tutorial on array list.
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Read Xml Attributes Into An Array Or List?
Dec 30, 2009I am trying to read the attributes of xml elements into a class which is then added to an array (I've tried the same thing with a List(Of T). For some reason, the last element is put into all the array positions. There can be a varied number of FactorParam elements each represent a different parameter and its relevant values. If there are two parameters, both positions in the array ActiveAGMP.FactorParamsArray will contain the values for param2. Likewise, if there are three parameters, all three positions in the array will contain the values for param3.
<FactorParam name="param1" type="string" id="1" value="Close" />
<FactorParam name="param2" type="integer" id="2" value="20" />
<FactorParam name="param3" type="integer" id="3" value="10" />
[Code].....
Convert An Array Of Any Object To A CSV List?
Feb 28, 2009I am using Linq to convert an array of any object to a CSV list:String.Join(",", (From item In objectArray Select item.ToString()).ToArray())
This is giving me the strange error: "Range variable name cannot match the name of a member of the 'Object' class."I can get round it by wrapping the string in a VB StrConv method, with a setting of "Nothing":String.Join(",", (From item In oArray Select StrConv(item.ToString(), VbStrConv.None)).ToArray())
However, this seems like a bit of a hack and I would like to avoid it.Does anyone have any ideas when this problems occurs, and any better ways to get round it?
Read A List Of Data Into An Array Using A FOR NEXT Loop
Mar 1, 2010I cut my programming teeth on QBASIC so apologise if I'm a bit behind the times. I wrote a program in QB and I'm trying to convert it to VB.NET. One stumbling block I've hit is the DATA & READ facility, there does'nt appear to be an equivilant in VB. I want to read a list of data into an array using a FOR NEXT loop.
View 13 RepliesArray Of Structures Method - Get The File Read And Printed Onto A List Box?
Apr 17, 2012These are the directions for the assignment.So far I am able to get the file read and printed onto a list box.The book we have for the class does not clearly talk about using the array of structure method with formatting an imported text file.After that I'm pretty much having a bit of trouble with everything else.I know I can figure most of it out but what I'm having a big amount of trouble with is the array of structures that he wants.I know that when I have the file imported that I need to save it temporarily and go through it and at every ":" put it in an array and save that spot and then keep scanning through the file. I know it is going to be a for loop using the index to count through but I'm not sure if how to start it.This is how the text file that he wants sorted out looks.
Ally Gators:Tim Tebow:240:280:250
Ally Gators:Albert Gator:150:175:222
Ally Gators:Joe Cool:195:220:217[code]...........
Create A Remoteable Object With Method That Sums Up Elements In Array List
Jul 27, 2010I need to create a remoteable object with a method that sums up elements in an array list. How do i go about it?
View 1 RepliesHow To Searching Part Of Object Inside Array List Without Looping Method
Feb 10, 2012I save the client data into an array list. How to find part of data(currentIP) inside the array list(clientList) with fast method? [code]
View 1 RepliesList Of T Find Date Or Other Property In A Object In The List - Then Return Found Object?
Sep 3, 2009After 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]...
Program That Will Compare Array Of Grocery List Items Glist And Array Of Coupon Item List
May 27, 2012I have a program that will compare an array of grocery list items glist and an array of coupon item clist.When I compare the two and if there is a match somewhere in the array I want to have a picturebox visible.When there is no match, I want the picture box not to be visible. [code] The code seems to work great until I come to the else statement.When the code finds a match it displays the picture box and the msgbox without error, but as soon as the message box is cleared, even though i've input it as an ELSE statement, the picturebox goes false again.Does anyone have any idea of how I can "hold" the picturebox to stay visible while the match between the arrays exists?
View 18 RepliesDisplay A List (Of Object) Which Has Single Objects And Child List (Of Object)?
Sep 6, 2011Limited to using v2.0 of .Net framework (we use VB.net) due to environmental constraints on our servers.I've got an ASP.net webpage which pulls data from a webservice that performs checks on user accounts in active directory. Operators can check multiple accounts at one time using the web interface. The webservice returns a list(of AccountCheck) objects which themselves contain single properties like username, email address, and List(of AccountError) objects which contain multiple properties.[code]What I want to do is using some kind of repeater, create multiple panels or divs which contain labels showing the username, email etc, and a gridview which has the accounterror list bound to it to show all the errors. The users could be checking 2, 5, 7 accounts at once, and is dynamic.
View 2 RepliesCast A List Of Object To List Of Interface That Object Implements?
May 19, 2009I am working in VB.net and have a Class, Foo, that implements an interface, IBar.I have a List of Foo's, but I need to pass a list of IBar's into a function, but I keep getting casting errors, even when I use DirectCast.My code is [code]MainWorks works, but it would be really annoying and inefficient to have to do that everywhere I want to call this function.
View 4 RepliesVS 2008 Adding Class Object To List Or Array In A Different Class
Jun 21, 2010I am trying to create an list or an array of a class.Here is my "Ingredient" class that I am trying to create a list of:[code]In my "recipe" class, I am want to create a list (or array) and I am drawing a big blank on how to do it. Can anyone point me in the right direction?
View 2 RepliesRead File Line By Line To Array List
Jun 22, 2009I have code that reads the whole file, not line by line.
Here is the code:
FileOpen(1, filename, OpenMode.Input)
Do While Not EOF(1)
datatodisplay = LineInput(1)
Loop
FileClose(1)
I would like to know how I can read the file line by line and then add all results into an array list.
.net - Cast A List Object Of Chars In An Array Of Chars?
Nov 20, 2010How to convert or make a cast of a List object typized as a container of chars like
Dim mylist As List(Of Char) = New List(Of Char)(New Char() {"1"c, "2"c})
in a simple array of chars as
Dim mychars() As Char
without make a loop for...
How To Quickly Transform A List(Of Object) Into A List(Of "Object.field")
May 29, 2012Suppose I have a list of Cat.
Public Class Cat
Public Property id As Guid
Public Property name As String
Public Property race As catRace
End Class
How can I quickly transform this List(Of Cat) into a List(Of Guid) using the id property?
I could do :
Dim newList As List(Of Guid)
For each item in catList
newList.Add(item.id)
Next
But I think there must be a way to do this faster (1 LOC). I just can't find how.
Object Reference Not Set To An Instance Of An Object With A Class With An Array Of Classes As A Member?
Aug 6, 2010Here is the structure that I have:
Friend Class StandardFormatFile
Friend fileType As String
Friend numberOfSeries As Integer
[code].....
C# - WCF Serialization And Interfaces - Error: List(of Object) Cannot Be Converted To List(of IMyInterface)
Oct 16, 2009Does link text mean I have to return a concrete implementation? Even though I am using svcutil with the /r that includes my entites(where IMyInterface is defined). I get no errors but it changes all List(of IMyInterface) to list(of Object) and I cannot deserialize it on the client
Error: list(of object) cannot be converted to list(of IMyInterface).
Does An Object Retrieved From A List Get A Copy Of That Object Or A Reference To It
Feb 1, 2012In VB.net, when I retrieve a value from a list do I get a copy of that value or a reference to it?
dim blah as someObject
dim listOfBlahs as list(of someObject)
listOfBlah.add(new someObject(1))
[Code]....
Why Is List.add() Adding Items To Object AND Source Object As Well
Jun 15, 2011I need to be able to add elements to a copy of mylist.testlist without modifying the global mylist object. (Which seems to be happening via the below code.)When I am working on x, which should be a totally separate object, mylist is getting modified as well. How can I fix this? I have worked with lists extensively and never seen this behavior before. I have tested and reproduced the problem in .NET 3.5 and .NET 4.0 on Win 7 Pro 32bit.
Source Code:
Public Class Form1
Public mylist As New test
Sub Main()
[code]....
VS 2008 Binary Serialization - Save An Array Into My .bin File Then Read The Array Again
Nov 27, 2009Can I save an array into my .bin file then read the array again just like a string or Integer??
View 2 RepliesCreate List Of Child Objects From List Of Parent Object?
Jun 2, 2011I would like to create list of child objects from list of parent object. Like If i have list of bookingroom which has one member room then i would like to create list of room from it.
eg. code:
Dim BookingRoomList As List(Of BookingRoom) = New List(Of BookingRoom)
Dim RoomList As List(Of Room) = New List(Of Room)
BookingRoomList = BookingRooms.FillGrid()
[Code]....
Is there any short cut method instead of iterating over for earch?
Copy List Object To Another List Object
Jun 15, 2012I am having a problem when setting VB.NET list object to another.I create an instance on ReadLocations and than create an object of ReadLocation where then I loop through ReadLocations and set ReadLocation1 equal to rl. What happens is that if I then go and change ReadLocation1 to something else (assdfhsd) it will also change the ReadLocations index. I am really confused why it would be doing that unless it is "=" sign means referencing instead of actually setting the value. Please help as I am a C# developer but the program I am modifying is in VB.NET.[code]
View 1 RepliesRead Part Of Text File Into 1d Array Other Half Into 2d Array?
Mar 28, 2012im trying to make an example program for a teacher friend of mine
Springfield
Toledo
Youngstown
[Code]....
thats just what i have so far but im really having trouble getting the other part into a 2d array. i want the second half to look like this when done: the oppsite of what it looks like in the file.
001
359
203948
.net - Searching A List Of Objects In An Object List Using Linq?
Dec 22, 2010I have 2 classes
Public Class Shipper
Public Property ShipperID As Long
Public Property CreateDate As DateTime
[Code].....
Object Array To Byte Array - Marshal.AllocHGlobal Fragmentation Query?
Jun 14, 2011I didn't think it fair to post a comment on Fredrik Mörk's answer in this 2 year old post, so I thought I'd just ask it as a new question instead..NB: This is not a critiscm of the answer in any way, I'm simply trying to understand this all before delving into memory management / the marshal class.
In that answer, the function GetByteArray allocates memory to each object within the given array, within a loop.Would the GetByteArray function on the aforementioned post have benefited at all from allocating memory for the total size of the provided array:
Dim arrayBufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(<arrayElement>) * <array>.Count)
I just wonder if allocating the memory, as shown in the answer, causes any kind of fragmentation? Assuming there may be fragmentation, would there be much of an impact to be concerned with? Would allocating the memory in the way I've shown force you to call IntPtr.ToInt## to obtain pointer offsets from the overall allocation pointer, and therefore force you to check the underlying architecture to ensure the correct method is used*1 or is there a better way? (ToInt32/ToInt64 depending on x86/64?)
*1 I read elsewhere that calling the wrong IntPtr.ToInt## will cause overflow exceptions. What I mean by that statement is would I use:
Dim anOffsetPtr As New IntPtr(arrayBufferPtr.ToInt## + (loopIndex * <arrayElementSize>))
I've read through a few articles on the VB.Net Marshal class and memory allocation; listed below, but if you know fo any other good articles I'm all ears![URL]..
Determine If List(Of Object) Contains Control Object ?
Nov 8, 2010How to know if a List(Of T) contains any control object without using a loop ?This doesn't work
Dim lstObject As New List(Of Object)
lstObject.Add("STRING")
lstObject.Add(2)
[code].....
Disposing Object Collected In List (Of Object)
Jul 29, 2010I would like to ask what is the efficiency way the clean and dispose the object collected in the List (Of Object)?
Is that by calling the List.Clear() method will automatic clean all the object collected by it?
VS 2008 Remove Object In List(Of Object)?
Feb 11, 2011I am able to populate an object and output everything. How do I remove say the name2 object?
la.Remove(Logins("name2")) doesn't seem to work.
Private Sub btnListArray_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnListArray.Click
[code]....
.net - Returning A List Using Entity Framework, 'System.Collections.Generic.List Cannot Be Converted To '1-dimensional Array
May 3, 2012i have issue returning a list in a web method. here is the code
<WebMethod()> _
Public Function getTags(para_parents As String) As List(Of getTypeDetailsByParentName_Result)()
Dim context As New PPEntities
[code]....
the error is
Value of type 'System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)' cannot be converted to '1-dimensional array of System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)'
Passing An Array Of Integer To An Array Of Object In A Function
Mar 4, 2012I am creating a dll with all the functions and subroutines that I use all the time and I decided to create a function that I can pass different types of array to so the function obviously (or not) would have an array of type object. Now I no you can pass any type into an object type but when I pass an integer array into an object array I get an error.
value of type '1-dimensional array of integer' cannot be converted to '1-dimensional array of object' because 'integer' is not a reference type.
Shared Function CompareArray(ByVal FirstArray() As Object, ByVal SecondArray() As Object, Optional ByRef ErrorMessage As String = "") As Boolean
Dim IntArrayOne() As Integer = {1,2,3,4,5} Dim IntArrayTwo() As Integer = {1,2,3,5,6} Dim IsSame As Boolean = False IsSame = CompareArray(IntArrayOne(), IntArrayTwo())