I'm trying to learn how to work with Collections list. In the past, if I wanted to create a list I would use an array and then save it to a text file after I was done manipulating the data via CSV.how to save things of different types to a list such as:
Name, Birthdate(as date), Salary
I know how to do this in an array but all the synapses aren't firing with the "new to me" collections list as collections lists are hard typed....
I'm having a problem with this code in the highlighted line(*); getting the error in the heading.
Dim htmlarraylist As New List(Of iTextSharp.text.IElement)
htmlarraylist = *HTMLWorker.ParseToList(New StreamReader(tempFile), New StyleSheet())*
[Code].....
[code]...
What's really the point in using the former?It's hard to use linq if I used the former. I have to convert that to an array first which is difficult because there is no (asarray) function.I think I would change all of my code that's using System.
Collections.Specialized.StringCollection to System.Collections.Generic.List(Of String)
i 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)'
So I am trying to code something in vb.net 2010 which will have a list box. For example:
1) Apple
2) Pizza
3) Juice
How would I display Line number 2 or any other to the user - I tried doing it with a label box like this Label1.Text = ListBox1.Text(2) - does not work.
I have converted c# .cs to vb:= I have 6 errors on:
Red "List" says Too few type arguments to system.Collections.Generic.List(Of T)'
Orange "Calendar" says Value of type 'System.Windows.Forms.Control.ControlCollection' cannot be converted to 'Form1.Kobush.Windows.Forms.Appointment'.
[code]....
My problem is probably something simple..I am trying to load a list of a perticularcustomer.I will have to load the list of all the purchases they have make (amount of tickets purchased (rseat). It runs fine, but when I change the file name from fri to saturday and keep the call name the same it still searches to the name that is in the call name textbox. I dont want it to do that. I want it to say the there are no reservation for that name if I change the file.here is part of my code.
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
'resets file reader and put to the top of txtfilename
[code].....
i want to exclude some form fields when processing a postback. I done the following but having some issues:
Dim rtnValues As New StringBuilder
Dim arrJoinValues As String = String.Join("|", _setFormValues.ToArray)
Dim arrSplitValues() = Split(arrJoinValues, "|")
[Code].....
imagine i want to add an extension method to System.Collections.Generic.List(Of T)
let's say i want to give it .GetUBound which returns Count-1
I have a lists of different custom classes and each must be sorted severals times before the algorithm is complete. For each sort I wrote a comparer. Sofar so good. Everything works. But: By now I have abou a dozen different comparers in more than one class and it is still getting more. I wonder if there is a way to limit the number by writing a new general function that can be used to sort all lists without the need for a specific comparer.Below is what I've got so far. But it does not work.
"System.Collections.Generic.List(Of ClassA)" can not be converted into "System.Collections.Generic.List(Of Object)."
[code].....
I am trying to pass a System.Collections.Generic.List to another class. The collection is created in class2 and then passed into class1
[code]...
However I get a 'Null Reference Exception error' when I run the program. It seems f_str in the line 'For Each s As String In f_str' is null.
how to find a value in the System.Collections.Generic.List.I have:
Private ids As New List(Of Byte())
ids.add(New Byte(){&HA8,&H0F})
ids.add(New Byte(){&HFF,&H03})
ids.add(New Byte(){&H10,&H00})
I would like to find for example: &H10,&H00 in that list and if there isn't the stuff I wan't to find then how do I know that?
I need to be able to tell if a property is of type List(of T)but am currently unable to. if i do
TypeOf (UpdateTo.GetType.GetProperty(node.Name)) Is System.Collections.Generic.List(Of Object)
I get the following error
TypeOf (UpdateTo.GetType.GetProperty(node.Name)) Is
System.Collections.Generic.List(Of Object) Expression of type
'System.Reflection.PropertyInfo' can never be of type[code]......
I am new to .Net Programming and would like to know if Reflection is suitable for traversing an Object to discover Collections within an instance of a class. I am working with the Microsoft.SqlServer.Management.Smo Namespace.
The plan is to connect to a database, determine what collections exists, then for each of those collections, if the Collection exposes objects which implement the IScriptable Interface, generate a script for the object.How do i do the following (This is pseudo-code as I am seeking assistance with using reflection or some other method to do the following)
[Code]...
I would like to enumerate all objects in db with one function if possible
in what situation will an item in System.Collections.Generic.List not be removed successfully?url...The way they phrase it makes me think that it is possible that a Remove operation on an item found in the List(Of T) could actually fail.
View 4 RepliesI need another (dozen) pair of eyes on this. The following code:
Interface iRuleEntity
Function GetRuleViolations() As List(Of RuleViolation)
End Interface
Partial Public Class Feedback
[code]....
is giving me this error:'Feedback' must implement 'Function GetRuleViolations() As System.Collections.Generic.List(Of RuleViolation)' for interface 'iRuleEntity'.
I have these objects:[code]Using LINQ I need to take a List(Of MakeInfo) and a List(Of ModelInfo) and aggregate the StockInfo from ModelInfo into the List(Of MakeInfo).So for each MakeInfo I will have a total count of all stock where MakeInfo.Name = ModelInfo.Make, and also a minimum price.I think it's going to be something like this, but I'm having trouble accessing the nested object and not sure if it's going to be possible with a single query.[code]
View 2 Repliesi am trying to create a list of list in that i would like to work on multiple accounts at the same time. lets say i have 5 accounts. every account has a seperate name. each account has a few fields. so i though of having a list of bookkeeping (with 5 accounts) and a list of accounts (with expense, income, tax, status, etc as fields). [code] and if the idea of using list of list works how do i loop through both lists.
View 6 RepliesI have a fairly lengthly block of code that I'm trying to convert from VB6 to VB.NET. The ArcObjects GIS code basically looks at a table and groups a bunch of GIS layers together and adds them to the ArcMap table of contents. I'm having trouble with this line when testing it in Visual Studio 2010: [Code]
View 1 RepliesI am trying to change the image in a picture box using a combobox with item collections 0-8.When I run the program no matter what I choose in the combobox it selects case 0 and willnot change. code below for selected index changed.
Private
Sub ComboBox1_SelectedIndexChanged(ByVal
sender As System.Object,
ByVal e
[code]....
I'm getting an error after sending a list to a web service.This is the code that is calling the web service:
Dim sProgramInterest As New List(Of Integer)
crmService.InsertProspectGetId(sProgramInterest.ToList)
But I'm getting this error.
[code].....
i am trying to put the contents of a listbox into an array using listcount so i can sort and manipulate the data in the listbox using linq. Everytime I try to use list**** it errors and tells me that listcount is not a member of systems.windows.forms.listbox It also gives this error or list. Here is the for loop i am trying to use to put the data into the array.
[code]
For i = 0 To displayListBox1.Listcount - 1
sorting(i) = displayListBox1.list(i)
Next
[code]
i dim'd i as an integer and sorting() as a string early in the program as class level variables. displayListBox1 is the name of the listbx containing the data I need to use in my LINQ inquiry.
Public Class Item
Public Text As String
Public Value As Integer
End Class
[code]....
Why does this not work, where itms is a List(Of Item)?
Error event triggered on the line: Me.uxDropDown.DataBind()
DataBinding: 'Project.Item' does not contain a property with the name 'Text'.
Public Class MortgageDetailsCalculatorForm
Private Sub CalculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CalculateButton.Click
[code].....
I have the following extension method. However, when I type "File." this method doesn't pop-up. What did I wrong?
[Code]...
I'm getting System.NullReferenceException error when I try to add the employee info to the Employees list.
[Code]...
That was probably bad title, but I'll illustrate what I'm trying to do. I have a method in a class that I need to call several times. The method returns a List(Of String). I'm just grabbing some information from a database.
VB.NET
Public Function GetTestList() As List(Of String)
Dim int As Integer = 0
[code]....
I just installed Microsoft Ribbon for WPF 2010 on 2 different windows 7 boxes. If I make a .net 3.5 project it works fine but a .net 4.0 it does not.I can load the sample ribbon application and it works but when I drag the ribbon controls over they just make a transparent box. I notice it does not make the XAML correct. Here is the code, 4.0 on top then 3.5 below it. Is there some setting or option I need to change?
<ribbon:Ribbon Height="136" HorizontalAlignment="Left" Name="Ribbon1" VerticalAlignment="Top" Width="618" />
<ribbon:RibbonGroup Height="100" HorizontalAlignment="Left" Margin="72,36,0,0" Name="RibbonGroup1" VerticalAlignment="Top" Width="200" />
[code]....
Does anyone started to work with VB 2010?. I have to migrate an application from VB6 to a new language and I've decided that I will rewrite the application on VB 2010. Well, I am here in front of the new flash 2010 and I have no idea where start. ja!
View 8 Replieshow to get a keydown even to work but in 2010 this seems to have changed
Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If e.Keycode = Keys.Enter Then
MsgBox("test")
End If
End Sub
Apparently "KeyCode" is not in use anymore..