VS 2010 - Does Have Access To A Real Dictionary
Dec 26, 2010I just want my program to use random english words in some task and I was wondering if vb.net has access to the OS's english dictionary?
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Access Generic Dictionary Contained Or Nested In Another One?
Nov 17, 2009I have a Generic Dictionary contained or nested as a child in another Generic Dictionary. I need to be able to access the child dictionary objects by key. When I attempt to do this I get the following error:
"Value of type 'System.Collections.Generic.KeyValuePair(Of String, String)' cannot be converted to 'System.Collections.Generic.Dictionary(Of String, String)'."
So it seems that the contained Generic Dictionary is being returned as a Generic KeyValuePair when accessed via a key as opposed to iterating through the parent dictionary in a For/Each loop.
The first section of the sample works OK (using a key to access a string value in a dictionary).
The second section of the code works OK (iterating through the dictionary values in a For/Each).
The third section of the sample is where the error occurs (using a key to access a nested generic dictionary...see underlined code).
Dim td1 As Dictionary(Of String, String)
For Each thisKey As String In td1.Keys
Debug.Print(td1(thisKey))
Next
Dim td2 As Dictionary(Of String, Dictionary(Of String, String))
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Doesn't Anyone Use Dictionary Member Access Expression
Dec 4, 2009Doesn't anyone use the dictionary member access expression? (a.k.a. the bang operator) If so, in what scenarios? url...
View 1 Replies.net - Dictionary Access: Composite Key Vs Concatenated String Index?
Jan 31, 2012I have a dictionary that I want to access with a key that is the combination of a string (AcctNum) and a date (BalDate).It seems to me the simplest approach is to create the key by simply converting the date to a string and concatenating:MyKey = BalDate.ToString & "|" & AcctNum
I know I also have the option of creating a composite key by writing a separate class and overriding GetHashCode() and Equals() a la this solution. To me, the concatenated string is a simpler, if somewhat less elegant, solution. Am I missing some compelling reason why I should go with the composite key class approach?
This lookup is the crux of the project I am working on, so performance is my main objective (with readability a close second).
VS 2010 - How To Get Real IP Address
Feb 1, 2012In a WinForm application, if you want to get the IP address of the machine the code is running on (for instance, to log in the database what the IP address is when a user deletes a record), I would use this
Dim xEntry As System.Net.IPHostEntry = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName)
Dim ipAddr As Net.IPAddress() = xEntry.AddressList
blIP.Text = ipAddr(0).ToString()
While the code works, and it returns the correct IP address (for example: 140.139.138.137), Visual Studio doesn't like that code, and tells you that GetHostByName is obsolete, and needs to be replaced with GetHostEntry.
But if I do that, then I get back something that does not look like an IP address:
fe80::28ba:e091:1056:949f%11
So my question is, if I'm not supposed to use GetHostByName because it's been replaced by GetHostEntry, how come GetHostEntry doesn't give me the IP address?
VS 2010 A Real Stumper - DLL & Imagelist
Jan 19, 2011I am working on a DLL to do PDF manipulation. In my DLL I reference the itextsharp DLL. (ie. a DLL in a DLL) In my DLL I have a form with an imagelist on it. Now here's the strange part. if I put an image in the imagelist in design mode & run the program I get this error:
Error1Could not load file or assembly 'file:{full path}/itextsharp.dll' or one of its dependencies. The system cannot find the file specified. Line 141, position 5. Error2Unable to open file 'D:VBProjectsDLL_DemoMyDLLobjReleaseMyDLL.Form1.resources': The system cannot find the file specified.
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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.
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VS 2010 - How To Get Real Size Of Protected File
Jun 15, 2010I have code a sample program. and protect it with Xenocode,It's weird That I can't get the real filesize of the protected file.the code I use to detect filename and filesize is below:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim fileDetail As IO.FileInfo
fileDetail = My.Computer.FileSystem.GetFileInfo(Assembly.GetEntryAssembly().Location)
MsgBox(Assembly.GetEntryAssembly().Location)
MsgBox(fileDetail.Length)
End Sub
When it startup. It does not show the correct file size "359,833"of this exe instead of a smaller value."20480". Even I define filepath to a real path such as "C:WindowsApplication3.exe" and detect C:WindowsApplication3.exe,'s file size it shows 20480 too. seems something wrong with file.length method. With Assembly.GetExecutingAssembly() also return false value of file length.
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
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VS 2010 : View Array Data Real Time?
Feb 13, 2012On VB.NET 2005 and 2008, if you were debugging you could roll over the variable you set as an array and a little "+" would pop up next to the array variable and you could click it and see all of the data loaded into the array.
View 3 RepliesVS 2010 Displaying Real-time Serial Data In GUI?
May 24, 2010connected to my Arduino. Using the VB.NET (2010) GUI I request which LED I want on (via buttons) and the I2C device then sends a reply confirming which LED actually turned on (basic feedback). Ok, sounds great right? Here's where I get issues. Well when I try to read the serial data sent to VB and display the real-time stream on the GUI, a) I get a bit of a mess as an output (values are ok, just spewn across GUI) and b) when I select a new LED to turn on, the GUI data does not refresh to this change. The stream being sent from the Arduino is ok, I looked at the data in a serial monitor.
Public Class Form1
Dim ticktock As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
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VS 2010 First Shot At A Dictionary
Jan 21, 2012I am a relatively new coder and have been learning quite a bit over the past year. I have a fully functional application that works fantastic, and I am now in the process of learning better coding habits.The original code is set up like this...I have a combobox where I place the collection items in manually.On the selectedIndexChanged event handler I used a case statement that looks something like this: [code]Ok, so as you can probably tell, the file name and the dropdown option have the same name, and when it's selected it loads the contents of the resource file into the listbox. It works great...but I was told that since the case statement is ever growing, I should use a dictionary instead. So my goal was to simplify my coding efforts (when I add a new item I have to code in three different areas...with the dictionary, I only have to add the new item and everything else will take care of itself).
So I created the dictionary in a sub, an used a for each loop to dynamically load the combobox with the key values.My values in the dictionary are set up as "My.Resources.filename" where filename matches the key value.I want to be able to call the value based on the selected key. After 5 days of researching I think the best option is the TryGetValue method, but I cannot get it to work...I have used so many different examples, that I actually had to get rid of them all and don't have any current code to post.
1) If I redeclare the dictionary, won't it be empty?
2) How do I "extract the value based on the selected key an set it to a variable (i.e. myvariable = My.Resources.selectedkeysvalue)
VS 2010 Caching Real-time Data To Avoid Crashing Chart?
May 10, 2011- I'm working on a windows forms application (.NET 4.0). - My form contains a 'Fast Line' chart using the Microsoft chart control included in VS2010. - The chart gets filled with about 20,000 datapoints. - My application then starts receiving market data from a server via DDE (Dynamic Data Exchange) in real-time and adds it the chart.
Note: I have no control over the server and so I have to deal with DDE only even though it's an outdated technology. VS doesn't support DDE anymore and so I use the Ndde library which works like a charm.
Private Sub StartDDE()
'first we connect to the DDE server:
Dim client As DdeClient = New DdeClient("ServerApplication", "Bid")
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VS 2010 Defining A Property As A Dictionary?
Sep 29, 2011I am trying to create a property and declare it as a dictionary. This property will be updated and called upon throughout my project. I may be complicating the issue but here is what I have...
vb.net
Private Shared m_ItemName As Dictionary(Of Integer, String)
Public Shared Property ItemName(ByVal Tkey As Integer, Tvalue As String) As Dictionary(Of Integer, String)
Get
[code]....
What I wish to do with the dictionary is to keep a record of the amount of items selected, the Key will be the Integer in the dictionary and will be the ID of that item in a database while the String will be the name of the item matched to that ID in the database.The user will be allowed to enter up to no more than 10 items at a time (overkill but necessary for the unknown).I was originally going to use an array statically declared allowing up to 10 items (eg. Private Shared m_ItemName(,) As String = New String(9,9) {})
VS 2010 Initialize New Dictionary Can Specify Key / Value Pairs On Same Line?
Sep 6, 2011When I initialize a new dictionary can I specify the key/value pairs on the same line?
View 13 RepliesWrite A Dictionary (collection) Object To File (2010)?
May 4, 2012I am attempting to write a Dictionary Collection to a file.The Collection is structured like so:
GlobalCollection (Collection of TestCollection)
(0)
[KEY]
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.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 RepliesVS 2010 : Fill A "gap" After Removing A KVP In A Sequential String Key Based Dictionary?
Jan 2, 2012I need to remove an instance in a class for which I also created a dictionary with a string key type. Like this...:
vb
'Declare dictionary
Public PersonsList As New Dictionary(Of String, Person)
'At the bottom of frmMain.vb
[code]....
As you see, I end having 120 instances of the class Person, each assigned with a string key consisting in "student1" to "student120".
At other parts of the program I repeatedly refer to PersonsList("student" & n) to set values at those class entries, mainly with a For n ... Next block.
Now... I need a routine to remove one of those instances for good, including its entry at the dictionary, so my first bet is this...:
vb
Public Sub ExpellStudent(ByVal student_index As Integer)
PersonsList.Remove("student" & selected_student_index)
students_count -= 1
End Sub
I assume this is good enough to remove the KVP at the dictionary AND the class instance proper... right?Well, even if that is ok, I foresee one problem... Let's say I removed "student46". Next time I run a For n = 1 to students_count I would bet that I'll receive an exception due to having a gap at "student46" KVP... and that without saying that students_count will be 119, so it will never reach "student120".In short, I need a way to reassign the KVP of the now 119 Person entries, so they're consecutive again (I don't care about them changing their string key values), so I still could use my For n = 1 to students_count ... Next blocks without problems... but I cannot figure out how.
Program To Access A Microsoft Access 2010 Database?
Sep 9, 2010I coded a program to access a Microsoft Access 2010 database. The program is written using Microsoft Visual Studio 2010. I get the error message that the database I'm trying to access is in an invalid format. look at the code below to see what I missed. The error is in the datasource statement.
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Copying 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]....
VB 2010 Object To Access An MS Access Database?
Nov 17, 2010quite new to database queries through VB. I have just created a DB using MS Access and I need to write data to it from my VB Application.Can anyone point me on which objects should I use to execute these write transactions?
View 6 RepliesConnect A Database (created In Access 2010, Saved In An XML Format And Put On Website) To A Login Form In VB 2010?
Jul 16, 2011it's just for a program registration. i would store all of the registration codes in the access database, then export it to XML, then upload it to my web host. I would then somehow connect it to my Visual Basics login form (Which I have already made). If this can't be done, having them register through the form and having all the allowed codes on the internet (So i can easily edit them)!
View 5 RepliesVS 2010 Using An Access Database Without Access
Jan 27, 2012I've built my program a database in Access 2010. Works very nice. But I've had a thought. When my program is compiled and I give it out to users. Will those users need a copy of Microsoft Access to use my program. If so, How could I make it so that no install of Access is needed.
View 3 RepliesError In UPDATE Statement In VB 2010 And Access 2010?
Apr 1, 2012Syntax error (missing operator) in query expression '''system time'''.this is the error that appears
this is my code:
Dim sqlCmd As String
Dim x As Date
x = Format(Now(), "General Date")
[code].....
the fields in the tables are all text fields.is there any way to fix this error? perhaps it is in my query but i really cant find a solution.is there an alternative to get what i want my program to do?it is basically entering an ID number and finding the record with the same idnumber and putting the system time on the timein field for that record.
If I Use An Access 2010 Database, The User Needs To Have Office 2010?
Sep 17, 2011I programmed an app with an Access 2010 database, I installed the app and the database on a computer with office 2007. The app can't open the database. Do I need to copy some extra file on the user's PC?
View 15 RepliesSQL Statement Worked Worked Fine With Access 2007 But Does Not Work In Access 2010?
Aug 23, 2011upgrade my DAO code to ADO? The following code worked fine in VB.Net for Interop Access 2007.
View 1 RepliesHow To Get Real IP
Feb 25, 2011How to get my real IP using vb.net?
View 3 Replies.Net 2010 To Access 2010 DataSet Primary Key?
Jan 17, 2011I am using Access 2010 and VB in VS2010.I have created a DB and have several tables. 1 table in particular called Employers, has the normal AutoNumber Primary key. Everything in Access runs fine. I used Access to develop a basic model application of the full version I am developing in VS.My VB front end contains a dataset linked to the employers table. I have dragged onto my form the "detail" view of this DataSet, not the DataGridView. The usual controls are in place such as the EmployerBindingSource, EmployerTableAdapter, TableAdapterManager and a EmployerBindingSourceBindingNavigator.On my VB form Scrolling through the record set is fine and all works well.My problem is after I click the "Add" record button on the EmployerBindingSourceBindingNavigator. The form fields go blank as expected awaiting user input. However, the field that is bound to the employer_id field (the Employer table's primary key) shows a value of -1.The insert command works no problem, and having looked at the database the table contains the new record with a correctly incremented PK
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