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 have a windows app and I'm trying to cache images in memory. I have:-
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I think I have to sort the array to be able to use binarysearch.So I need to sort the arraylist on TileDetails.TileURL(if possible) and then binarysearch on it.
How can I sort an ArrayList of custom objects by public member? Example,If I have a list of article objects, and I'd like to sort the list by the rating member after I've filled the ArrayList
Public Class Article
Public bulletin As String
Public rating As Integer[code].....
Now I'd like to sort uniqueArticles by rating and print articles by rating order.How do I do perform that sort?
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 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)
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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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I list folders in my combobox but I'm trying to sort the folders alphabetically and then numerically or vice versa.
My coding to populate my combobox is
With Combobox1.DataSource =
(From folder In New IO.DirectoryInfo("Path").GetDirectories
Select (folder.Name)
).ToArray
End With
Is it possible to sort the combobox?
I have folders that are numbered like 1, 50, 115, 189 etc.
These should display as
1
50
115
189
however they display as
1
115
189
50
I have a .Net 4.0 WPF application using a data grid. Currently after sorting by a column, the scroll position of the grid stays where it was before the sort.For this application, I need to scroll to the top of the grid after any sort.I've tried handling the sorting event like this
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But this appears to fire before the sorting takes place and doesn't perform the scroll.
I am reading an Excel file into VB.NET. There are 4 columns containing dollar figures of varying amounts. Here is what I need to do is identify the columns with the highest $ figure, the next highest, etc. and mark them so that .NET can identify them (e.g. col3 is highest so rank1 variable is "col3" and so on).So I am dealing with Excel Ojects which is new to me and sorting which is new to me. If it helps, here is how I am reading in the Excel file:
xlsWorkBook = xlsApp.Workbooks.Open(folders(f).ToString & "" & fileInFolder.ToString)
xlsWorkSheet = xlsWorkBook.Worksheets("Sheet1")
Dim ColumnNumber As Integer = xlsWorkSheet.Cells(1, StartColumn).Column
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strtest() = objFile.ReadToEnd.Trim.Replace(vbCr, "").Split(vbLf).Distinct.ToArray
I created this command from a few examples which reads the text from a StreamReader, Trims, splits on EoL, and returns a unique list. My next command is a sort. I couldnt figure out how to add a sort to this command. Its really not that important but I was curious if there�s an easy way.
Additionally if there's a better way to take a text file into an array or collection I'm all ears.
