I'm trying to get specific elements of a listOf structure with the function findAll plus a lambda function, and then sort that result and keep that sorting of those elements saved in the list. The structure of the listOf has an id and an age, so what I want is get all the items with id=0 and then sort the ages of that result, keeping that modification in the variable.
View 1 RepliesIm currently working in VB2005 so it seems like this was harder to do in that release.
I have a class for a point
Public Class cPoint
Public Speed As Integer
Public Alt As Integer
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But that doesn't work in VB2005 much less work with more than 1 filter. I just cant seem to find a good example that works in VB2005. I could iterate through the list but its kind of big and not very efficient.
Such as:
mylist.FindAll(Function(item) item.property = variable)
The reason I ask is if I use syntax like this, I tend to get a string to whatevever conversion error, which makes me think "variable" is being treated literally as a string.
In C# I have been performing a FindAll in a generic list as follows:List<group.category> tlist = list.FindAll(p => p.parid == titem.catid);Two questions, is this the appropriate way of performing such a thing and how do I convert this to VB.Net
View 1 RepliesI am working on a program for a client and will need a feature to search for strings from an array without case sensitivity. This currently works, but it is case sensitive. I commented out the code for readability.
' Declare array for goldSmithingExpertise and add items.
Dim goldsmithingExpertise() As String = {"Alluring Earrings", "Alluring Ring", "Alluring Belt", "Howling Staff", "Dawn Ring", _
"Melancholy Earrings", "Melancholy Belt", "Melancholy Ring", "Jubilant Ring", "Jubilant Earrings", _
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I am importing data from an Excel spreadsheet into an array. I want to search the array to find the location of each "cell" with text that contains a certain string (e.g. "MyTestString"). So far the best I can do is loop through each element and test it using CStr, but the code takes too long to execute (please assume all variables are properly declared):
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(1) Is there a better way than looping through each element, such as a built-in function or a lambda that will return an array containing *the location of* all string matches?
(2) Would it be faster to convert the Object array to a String array rather than using CStr on each element? If so, what is the fastest way to convert a 2-dimensional Object array to a String array?
I've considered using Excel's Find function instead, but would prefer to limit the number of Interop calls to Excel.
How can I improve this bit below to make the items in the TreeView to sort faster or something totally different to sort them easier?
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I have a MyObject; myObjects as List(Of MyObject) and a delegate Comparison(Of MyObject) that uses a lot of comparison functions (ByA, ByB, ByC etc) Ã la:
Shared Function CompareMyObjectsByName(x As MyObject, y As MyObject) As Integer
Return x.Name.CompareTo(y.Name)
End Function
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Sub Sort()
ReDim RollsCC(NumOfPlayers - 1)
For N As Integer = 0 To (NumOfPlayers - 1)[code]....
Here I am creating a temp single dimensional array, merging my 2d array into it, and then attempting to sort it by Rolls(N,1), which is a integer 1-6, Everything seems to be working right with the exception of this.
RollsCC.Sort(RollsCC, 0, 1)
How would one specify a numeral sort based on the first character in the string? im aware that I am switching Rolls(n,1) and Rolls(n,0) information during the sort.
Currently my ListView sorts items by image.index. So 0 is at the top, then 1, 2 and so on. Think of it as an IRC chat room nick list. Ops at top then the rest are sorted alphabetically
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I am trying to sort an arraylist using .Sort() but am not sure what to put in the () for the field/column I want to sort on. Here is the portion of my code that creates the array from a SQL Query
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I am using the Array type .Sort function to sort my array.By default it places the result Array into Ascending order Least to Greatest How do I change that to Descending order Greatest to Least?and How do I change it to Closest to logic? or does that not exist?Assume there is an Array of Numbers 0,13,21,-2,4,5,1.34 and I want them to sort closest to 0 or some other arbitray value; the Output should look similar to:
0,1.34,-2,4,5,13,21
I have a List(Of T) storing a list of Custom classes called Advertisement. Each advertisement contains 3 properties, Year, Make and Model. I need to sort the list By Year, then by Make and then by Model. I have a property in the Advertisement class called Vehicle which returns a formatted string with the Year Make Model like 2007 Toyota Tacoma and ive been sorting on that but its not working how I thought it would. Basically I want to sort the list by Year (decending; lowest year first) then sort by the Make and Model (in alphabetical order) Is that even possible? Here is the code ive been using.
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I need to order a Dictionary in VB.net based off of the keys. The keys and values are all strings. The dictionary does not have a .Sort(). Is there a way to do this without having to write my own sorting algorithm?
View 3 RepliesI know there is an expander for WPF applications, but I have a WFA (Windows Form App) and I can't make it a WPF because of the progress I've made on it, and I just don't like WPF. But I need the expander, or an alternative to it, on my WFA. I can't reach the namespace for wPF from WFA either, so I can't create one. And selecting one in the controls list won't make it show up. know of a expander, or alterative to hiding things like that?
View 1 RepliesI'm trying to sort a DataTable using the following code:
Private Function sortDataTable(ByVal dTable As DataTable) As DataTable
Dim dView As New DataView(dTable)
dView.Sort = "Field ASC"
Return dTable
End Function
But it doesn't work. What is wrong? How can I sort the DataTable?
I have a listview that I want to sort from A-Z, but I also wan't to have it sorted in three seperate sections. Like say you have a list of users.
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I have a WPF app which binds a System.Collections.ObjectModel.ObservableCollection to a listbox. This ObservableCollection contains instances of my own class (named DataContractsUserObject) and at runtime when I add an object to this collection it automatically appears in the listbox because of the binding. The problem is that it always appears at the bottom of the list and I would like it to appear alphabetically sorted as the existing items in the listbox are.So I tried to sort the collection by doing this after I add an item to it:[code]but of course that is not actually sorting the original collection is it, its just sorting a new instance that is in a Generic.List format. Whilst I probably could just do that and then set that new list instance back as the source of the listbox binding, that will cause all of the items to be reloaded (and when each item in the listbox is loaded it animates in, so it would look stupid having all items animate in again just because one has been added).
The ObservableCollection class itself does not have a Sort method and although I know how to implement my own comparison class (using IComparer) I dont know how to make this work on an ObservableCollection without doign ToList or ToArray etc.[code]Just found this that looks like it might be of some use url...
I was wondering if anybody knew how to stable sort an array in VB.NET using a key.Basically, I am reading 2 CSV files and populating 2 arrays in parallel. The first array (asLines) holds the entire lines read from both files, and the second array (aiTrans) holds only the transaction #'s from those lines (the 2nd field of the line).What I want to then do, is stable sort asLines using aiTrans as the key.url...How can I sort asLines using aiTrans as the key and keep the order?
View 4 Repliesi was searching for a simple solution that i can use in sorting a dictionary by value, and i was not content with what i found, so i made up these two functions for sorting a dictionary ascending and descending. I do not assume that they are perfect, so improvements are welcomed. They are written in VB.Net and use an intermediary dictionary.
Public Function SortDictionaryAsc(ByVal dict As Dictionary(Of Long, Decimal)) As Dictionary(Of Long, Decimal)
Dim final As New Dictionary(Of Long, Decimal)
[code].....
I am using VB and MySQL. I have a field named xTime and the data type is TIME. I am trying to find a way to order it ASC or enable it to have the PM/AM in it. Right now my Data is as follows and I need the 3:20 and 5:50 to be after since those should be pm.
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I'm sure this has been asked here before but i couldn't find it, anyway my issue is i have filled a dgv using a LINQ query and i need to sort my results by 2 columns, i.e. type and cost so that it lists items by each type in creasing cost[code]...
View 10 RepliesI'll be creating an xml file with the idea that I can build a procedure to sort it based each row's Sortorder="n" as depicted below. If I'm on the right track here, I'm also hoping to keep Supplier and Contact in their sequential order.
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How can I sort a WinForms TreeView by using the nodes' keys, rather than by their names?
View 1 Repliesthe permanent text in the textbox. hint text
View 6 Repliesjust wondering which of these two sort methods would be more efficient movies.OrderBy(Function(m As Movie) m.Title)
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Visual Studio 2010 VB.NET
I have a DataGridView.DataSource set to a Collection of custom objects. The columns use read only properties from the custom object for display, this dialog is for display only. The properties all return String objects. I set the columns all but 2 of them to sortmode automatic (the ones that are not set is a button or a checkbox). Yet it does not sort. I have googled around and most people use sql or binding sources but I am using a trivial vb collection. Some say I should implement IComparable but isn't String already IComparable?
Per a request here are some code snippets.
This method defines the columns in detail from columns I designed in the designer.
The column names are called pSelected or pCustomer and corresponds with a property by the same name that the column definition ties to.
Protected Sub UpdateDGVUS()
If Not USColumnsInitted Then
USColumnsInitted = True
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I was asked this question recently in a test, which I didn't pass. For the life of me, I couldn't spot what the problem was. It's probably something really obvious as well, but even a colleague of mine couldn't spot it either. The best I could come up with was issues with bottlenecks and naming inconsistencies of parameters! I blame it on the fact I've not done any vb.net for years, I've been doing C# mostly these days
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The question: This function, although it will successfully sort a datatable, has a major problem with it.What is the problem? Re-write the function in either C# or VB.Net using LINQ.
All I need is a simple way to sort the strings in the collection. I can't find anything online. Everybody is using lamda expressions which I don't think works for just a string collection?
Public Property FilterCollection As New ObservableCollection(Of String)
From d In FilterCollection Order By (Function(d) d)()
I have data in my combobox1 and was wondering if it would be possible to sort the data in the combobox alphabetically? I have spent ages trying to find the answer by searching the forum but couldnt find anything,
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