How To Use Dictionary
Jun 21, 2012I have written this function to auto correct gender to M or F from different values in a string array. It works fine but my manager told me to use Dictionary which he said is more efficient.[code]
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Use Linq ToDictionary To Return A Dictionary With Multiple Values In The Dictionary Items?
Jan 25, 2010I want to group items from a linq query under a header, so that for each header I have a list of objects that match the header title. I assumed the solution would be to use ToDictionary to convert the objects, but this allows only one object per "group" (or dictionary key). I assumed I could create the dictionary of type (String, List Of()), but I can't figure out how to write it. As an example I have written a simplified version below.
[Code]...
Dictionary In A Dictionary - Collection Of Data To Pass Back ?
Apr 27, 2009I have created a class with a function in it. I have a collection of data I want to pass back. I tried an arraylist first. Now I am trying to use a dictionary. My problem is that it creates the dictionary ok, but I am only get the last row of data from my
Function GetWeldAuditInfo(ByVal ResourceId
As
String,
ByVal VendorId
[CODE].........................
Flatten A Dictionary Of Dictionaries And Sum The Values Of The Inner Dictionary With LINQ?
Apr 16, 2012I have the following object:
countDictionary As Dictionary(of Category, Dictionary(of Date, Integer))
The Class has a Enumeration Property. For the purposes of demonstration, I'll call it MasterCategory.I have been trying to get out an object that looks like the following:
groupedCountDictionary As Dictionary(of MasterCategory, Dictionary(of Date, Integer)
The best result I could get was:
Lookup(of MasterCategory, Dictionary(of Date, Integer))
From:
countDictionary.ToLookup(Function(o) o.Key.MasterCategory, Function(o) o.Value)
Which results in a IEnumerable (Of Dictionary(of Date, Integer)) for each MasterCategory value.However, I need that IEnumerable of Dictionary flattened to one dictionary with all the integers summed (total counts) for each date. I then tried to use various selects and group bys (from numerous stackoverflow posts) to "flatten" it, but my efforts have fallen short.
Current Code
[Category Class]
- MasterCategory As Enum
- Name As String etc
[code]....
.net - Filter Custom Dictionary With LINQ ToDictionary - "Unable To Cast Object Of Type 'System.Collections.Generic.Dictionary`2"
Jul 7, 2010I have created a Dictionary class (MyDictionary for the example). I am currently trying to pass MyDictionary into a function, filter it into a new instance of MyDictionary and pass this new instance into another method. When I am attempting to create the second instance from the filtered first instance of MyDictionary via Lambda Expressions and the ToDictionary Method, I am getting the following error:
Unable to cast object of type 'System.Collections.Generic.Dictionary`2[System.Int32,System.String]' to type 'MyDictionary'. I have simplified the example and recreated it in LINQPad and am getting the same error.
Here's the simplified version of my code:
[Code]...
Dictionary In Particular The Dictionary.ContainsKey Method
Jan 6, 2011I use VS2005 and I have just started working with the dictionary in particular the Dictionary.ContainsKey method. At the bottom of the page in the msdn library it says the following in the community content How to make sure that Contains functions properly.
View 3 RepliesCopying Every Value Of One Dictionary List To Another Dictionary List?
Feb 26, 2010How would I go about copying every value of one Dictionary list to another Dictionary list.
Here is what I've done:
VB.net
' Assign values to player pairs enumeration
Private Enum cmptrPairsList
empty = 0
[code]....
Any Way To Rename Dictionary Key?
Sep 27, 2011Is it possible to change the key of a dictionary?
View 6 RepliesAsp.net - Sorting A Dictionary By Value?
Apr 19, 2010I have a dictionary in the form of: { "honda" : 4, "toyota": 7, "ford" : 3, "chevy": 10 }
I want to sort it by the second column aka (the value) descending.
Desired output:
"chevy", 10
"toyota", 7
"honda", 4
"ford", 3
Change The Key Of A Dictionary?
Sep 27, 2011Is it possible to change the key of a dictionary?
View 11 RepliesDictionary Does Not Have A .Sort()?
Oct 19, 2011I 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 RepliesDictionary Keeps Updating Even When I Don't Want It To?
Mar 15, 2010I have a dictionary of key=string and value=datatable. I use a key to retrieve a datatable and assign that datatable to a new variable. Then I make some updates to the variable. However, I find that the dictionary itself is being updated even though I'm only updating the variable. This causes significant issues when I try to reference the dictionary later. How can I set up my dictionary so that it won't update when I use a value?
dim dt1 as datatable
dt1=dictionary(key)
For row=0 to dt1.rows.count
dt1.Rows(row)(4)=dt1.rows(row)(4)/2
Next row
'at this point, when I look up dictionary(key), the value I get shows all of the original values divided by 2.
Get All Dictionary Values?
Dec 6, 2010It is possible to output all the dictionary values to a textbox? Not the keys, just the values of all the keys.
View 5 RepliesHow To Make A Dictionary
Sep 30, 2011How to make a dictionary? that left side have listbox, rightside have one picturebox and textbox. When i clicked on the "APPLE" in listbox, it open APPLE'S picture and describe, when i clicked on the "ORANGE" in listbox, it open ORANGE's picture and describe.But now the problem is, i want to make it all in a exe, so that APPLE & ORANGE's picture and describe will be combine into the EXE, so what is the most easiest code to done...
- LOAD THE PIC INSIDE THE EXE (RESOURCE?)
- LOAD THE TEXT INSIDE THE EXE (RESOURCE?)
- SEARCH THE LISTBOX FOR SPECIFY ITEM
EDIT: With search function...
Is There Already A Dictionary Control
Mar 30, 2010[code] For example, if the word was "cat" it would return true. If the word was "jlakfh", then it word return false. To do this i need some kind of dictionary array or something. How do I do this? If it helps, I only needs words with less than 7 letters in them, and more than 2 letters in them. Also, I don't need the definitions of the words. I only need the words themselves in the arary. Do I need to manually input all the words into an array or is there already a dictionary control or something that I could use?
View 3 RepliesKeep The CollectionMain Dictionary Value?
Dec 28, 2011I've got a nested dict like:
Public collectionMain As New Dictionary(Of String, Dictionary(Of String, String))
When inserting a new item:
collectionMain.Add(node.SelectSingleNode("key").InnerText.Trim, collectionSub)
collectionSub.Clear()
On the add my collectionSub is filled with key & values. But when calling clear, the collectionMain.value is empty.
How can i keep the collectionMain dictionary value?
The collectionSub needs to be cleared, it's in a loop for filling.
Possible To Use Bit Array As Key To Dictionary?
Nov 3, 2010I have been trying to use a bit array as a dictionary key and even though I know each bitarray value is different the program fails with a duplicate key message when a try to add the second record to the dictionary. Is there any way I can make this work?
View 2 RepliesSerializable Dictionary, How To Set Key Name
Jul 16, 2010Question: I use a serializable dictionary class, found at , to serialize a dictionary.
View 6 RepliesSort A Dictionary By Value?
Dec 1, 2011i 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].....
Use The Dictionary In VB 2008?
Feb 1, 2010I have a series of "keys" and associated "descriptors". I have them set up in a VB dictionary to use the keys to select the descriptor for output (the descriptor is the English translation of the hexadecimal key; both are dictionaried as strings).I have looked at the help files and all they do is "for each" statements to retrieve the entire key list or the entire descriptor list. What I need to be able to do is take a key, determined early in the program, and use the dictionary to look up what the English equivalent is. I don't need to retrieve ALL the keys or ALL the descriptors.VB6 made this easy.I'm having trouble doing the same thing in VB 2008.I can provide a sample of the code I have been working with after I get access to that computer.
View 3 RepliesUsing A Dictionary In A TreeNode Tag ?
Jan 28, 2012I'm writing a bit of code that I want to populate a TreeView, which it does quite successfully, but I also want to put a Dictionary in the Tag of each Level 1 child node. Once the Tag has been set to the Dictionary, is there any way I can modify the dictionary, without redeclaring the Tag.For Each verse In Verses
Dim _verse = verse.ToString.Trim
Dim _node As TreeNode = New TreeNode(_verse.Split(vbNewLine).First & "...")
_node.ToolTipText = _verse[code]...
Using Dictionary With Interfaces?
Sep 12, 2009What I would like to do is make an abstract class that will hold objects in a dictionary and manage the adding/deleting/key changes of those items in the dictionary. My problem is that in order to make the class as generic as possible I declared the dictionary as dictionary(of long, of SomeInterface).The problem is when I try to pass a strongly typed dictionary in the constructor using dictionary( of long, ClassThatImplementsSomeInterface) I get a compiler error because it cannot convert to that type.
The reason I want to pass the dictionary in the abstract class's constructor is so that I can use the strongly typed dictionary in the subclass and have the abstract class manage the keys when it needs to. So how can I do something like this? Also- If there is a much better way to manage keys than what I am doing feel free to let me know, but I am much more interested in how to make this work since I have encountered this type of problem a few times before.
Here's the abstract class:
Public MustInherit Class HasChildrenKeys
Protected m_childItems As Dictionary(Of Long, IHasKey)
[code].....
Way To Create A Dictionary
Apr 12, 2010Is there any sort of API for google dictionary or dictionary.com (note: i have tried the google API but that does not support dictionary!!!) or some way to download the information from those sites? i will be using this in a bigger program (a very basic chatbot) so the definition has to be able to easily be output to a string or textbox!!!
note: i have asked mr.google many a time but all the responses are not what i want! and i dont want to have to manually write my OWN dictionary (i.e. writing in each specific word and definition)
.net - Custom Dictionary Object?
Dec 1, 2009I want to extend the VB.NET dictionary object to not bitch about an item being already in the associative array.This is what i want to do:
[Code]...
My problem now is:How can I replace the (of object, object)line to let the dictionary be of generic/customizable type?
.net - Sorting A Dictionary By Value With Linq?
Mar 23, 2012I'm trying to sort a dictionary by value with LINQ but I can't figure how the ToDictionary() method works.
All the examples I can find are in c#.
here's my code
Dim f As Dictionary(Of String, String) = (From value In projectDescriptions.Values
Order By value Ascending
Select value).ToDictionary(???)
[Code].....
.net - Sum Integer Value Fields Of A Dictionary
Jan 6, 2012In .net 4.0 dictionary I know I can calculate the sum of all integer value field like this:
[Code]....
Does exist a more elegant way to do calculate the sum?
Arrays - Get The Dictionary Functionality?
Mar 3, 2010I want to statically define a mapped array of strings like:
var dict = {cat:50, bat:10, rat:30}
and lookup values within it like:
MessageBox.Show( dict["cat"] )
Asp.net - Bind Dictionary To GridView?
Apr 30, 2012Algorithm to count the time that occured on the same period, how to bind the dictionary to the GridView? Pls take a look to the answer.
I tried to add a GridView and then on the code-behind: GV.DataSource = timeRangeCounts and bind it, but in return:
The data source for GridView with id 'GV' did not have any properties or attributes from which to generate columns. Ensure that your data source has content.
take a look at the code below:
The first helper class is used to hold the counts of exact and sub range matches:
Public Class TimeRangeCounter
Property ExactRangeMatch as Integer
Property SubRangeMatch as Integer
[Code].....
Asp.net - Generic Dictionary In Session .Net?
Aug 31, 2011I have a generic class called SessionManager to control the types of variables I store in session. I have been doing it for String, Integer, List(Of T) without any issues like this.
Public NotInheritable Class SessionManager
'''<remarks>
'''Private constructor to prevent instantiation of, or inheritance from, this class.
[code].....
I would like to do the same for Dictionary(Of T, T). I would like 2 generic private methods for Dictionary(Of T, T) for getting and setting; GetFromSessionAsDictionary and SetInSessionAsDictionary. (When nothing returns empty dictionary like the List(Of T) properties and sets in session) And this should allow me to create as many public properties of Type Dictionary (e.g. Dictionary(Of String, String), Dictionary(Of String, Integer)) as possible to store in session.
EDIT:This is what I have ended up doing after trying to make it generic Dictionary(Of T, T), and it works without any issues. What I want instead is a solution that would not constraint the type to Dictionary(Of String, Integer).
Private Const _Dictionary1OfStringInt As String = "DICTIONARY_1_OF_STRING_INT"
Public Shared Property DictionaryOf As Dictionary(Of String, Integer)
Get
[code].....
C# - Creating A Comparable Dictionary Key?
Aug 30, 2010I want to use a Dictionary(Of Key, Value), and the Key is not a base type, but a class like:
Public Class MyKey
Sub New(ByVal packet As String, ByVal sent As Boolean)
Me.packet = packet.ToUpper.Trim
Me.sent = sent
[code]....
But to have consistent results I have also to implement Object.Equals and Object.GetHashCode:
Public Class MyKey
Implements System.IEquatable(Of MyKey)
Sub New(ByVal packet As String, ByVal sent As Boolean)
[code]....
is that GetHashCode implementation correct? How should I implement it, to return a hashcode that kind of merges the string and the boolean hash codes?