I have two List(Of String).Both Lists contain duplicate strings. I want to pick out all the strings which are contained in both the Lists. For example:
List1 ={"10X100","10X100","10X100","50X100","50X100","100X100"}
List2 ={"10X100","10X100","20X100","50X100","50X100","100X100","200X100"}
So, the result should be: List3={"10X100","10X100","50X100","50X100","100X100"}.How to do this?
I have a list of strings. For each string in that list, I want to prepend another string. I wrote a method to do it, but I was wondering if there was something already in .NET I could use to do this. It seems like something that could be built in, but I was not able to find anything.
Here is the method I wrote:
Private Function PrependToAllInList(ByRef inputList As List(Of String), ByRef prependString As String) As List(Of String)
Dim returnList As List(Of String) = New List(Of String)
For Each inputString As String In inputList
returnList.Add(String.Format("{0}{1}", prependString, inputString))
[code].....
It works, but I would rather use built in functions whenever possible.
How do i set a label text to display any of the declared string list randomly.
CODE:
Say I have a List(Of Tag) with Tag being an object. One member of Tag, Tag.Description, is a string, and I want to make a comma-separated concatenation of the Description members.Is there an easier way to do this than to read the Description members into a List(Of String) and then use the Join function?
View 2 RepliesI have a problem finding strings that do not exist in a column in a database. I am going to use linq but its more the 'way' of doing I am concerned with.
I have strings like;
MEAL
GPST
EXLEG
EXLG ...etc
I need to find records that does not have this list of strings in, so for example DBML BUT sometimes I can have the string MEALDBML, or more concatenated. So this is a known string of MEAL and unknown string of DBML. I would then want to see that record. I do not know the unknown strings up front, so its a case of feeding in the strings I know are ok, and finding one that are outside that list. I was also thinking of regex?
I'm migrating from VB6 to VB.NET, in hence my questions below:
I have to write a function that returns array of strings.
How can I initiate it to empty array? I need it since I have to check if it's empty array after it returns from this function.
Is list of arrays better for this purpose? If I use a list - Is it empty when it firstly defined? How can I check it it's empty?
I made a program to make a random name up from 2 textboxes on my program ( a firstname textbox and a lastname textbox). But the problem is that I'm just getting the names in order they were put in. I was using this code
Dim fname2 As String = fname.Lines(F)
Dim lname2 As String = lname.Lines(L)
and once it generated the name I would put
[code].....
I'm relearning VB.net just for fun, so consider me new at this. I'm trying to write a program where the user can input a list of names or numbers, and the program will randomly pick one of those names or numbers. So far, I can get it to randomly generate numbers based on what I put in the code, but I don't know what I should use for the user to input the data, and how to code it so that the program will pick from that data.
View 3 RepliesI want the Function to accept List(Of String), Array & String and similarly return List(Of String), Array & String respectively. The Function simply adds a string (month) to the input collection. I just want to use it for string, array and list with needing to think of conversions.
[Code]...
How can I display a color dialog with a list of known web colors for the user to choose?
E.g.
black
white
dimgray
gray
darkgray
silver
etc.
I need to display ALL web colors
Give me some kind of tutorial for using the FB API with VB.NET (2008). I tried installing the SDK, but the components don't show up in the toolbox nor in the 'Choose Items' List...
View 4 RepliesI need more then 1 (MS-SQL) connection string/configuration, depending on the current running configuration (Development, Production, offline etc.)How could I declare these connection strings in advance (Proj.Settings) and tell the application which one to use without the need to compile the program.Using a command-line argument is an option but still unconvenient.I know .NET/ASP has an 'outside' non-comipied config file used by the application which you can modify.
View 3 RepliesI got an object of List<List<string>>I need to bring this into a ist<string>I have no idea how to do this with LINQ.
View 1 RepliesI would like to write a function GetHashCodeOfList() which returns a hashcode of a list of strings regardless of order. Given 2 lists with the same strings should return the same hashcode.
ArrayList list1 = new ArrayList()
list1.Add("String1");
list1.Add("String2");
[Code].....
I can first sort the list, then combine the sorted list into 1 long string and then call GetHashCode(). However sorting is a slow operation. I can get the hash of each individual string (by calling string.GetHashCode()) in the list, then multiplying all hashes and calling Mod UInt32.MaxValue. For Example: "String1".GetHashCode() * "String2".GetHashCode * ... MOD UInt32.MaxValue. But this results in a number overflow.
Let say for example that the year today is 2010.. what code can i use so i can only choose "10" rather than "2010".. its like I'm going delete the first two char. or get the 3rd an fourth character in order to display the text "10"...
View 3 RepliesOk so what i'm trying to do is grab some strings from a list box and put them in an array so i can list them in a message box each index of the array on a new line
So it comes up like this
you ordered :
arrayindex1
arrayindex2
arrayindex3 and so on
This is my first time posting here although I have been lurking for quite some time. I'm stuck with a problem I have seen before and never solved: I have a long list (~23,000) of alphanumeric strings that I'm reading into a List(of String) from a text file, and then sorting. When I iterate through the list after sorting, it appears to be correctly sorted EXCEPT that the element that was originally at the beginning of the list is now at the end (and it should be somewhere in the middle after the sort)Here is a sample input:
PRE1-PRE2_00015648
PRE1-PRE2_00015649
PRE1-PRE2_00015650
[code].....
I'm trying to populate a List with a column of a DataTable in order to later convert it to a AutoCompleteStringCollection later. Is there a neater way to do it than the "good old" For Each?
Is there a way to use myDataTable.Rows.CopyTo for this task?
So I've got a list of strings in ListBox1 and I want to remove the last seven characters from each string in the list and write the output to an excel file...
View 3 RepliesThe code below replaces if it finds a given string from the list of contractions with its equivelant from the list of word-contractions. E.g., if it finds 'll it will replace it with Will. The code words but whtn it comes to let's it will replace it with let is.
'remove panctuation and contractions first
Dim contractions As List(Of String) = New List(Of String)(New String() _
{"'ll", "'re", "'ve", "'m", "'d", "'s", "n't", "won't", "lets", "let's", "ikon of elkomenos", "ikon of crucifixion", "ikon of crist elkomenos", "Part A", "Part B", "renaissance style", "hagios nikolaos", "full wall fortification"})
[code]....
Update: I didn't make it clear but I meant this to be a question about where/how I would use a function to return a list of strings when I'm trying to just work with classes.I have a class called Account.
I have data access class called AccountDAO.I have various functions that return lists of objects like GetAllAccounts, GetAccountByID etc.I want to populate a drop down list with just the account names and nothing else. It's proving rather slow when using lists of objects and databinding them to the dropdownlist.
I feel like I should be using a simple "Select Account_Name From blah" type statement and returning a list of strings but I don't know how to work this into my class and data access class.
I'm new in this forum, and I'm a very very very basic user of the VB. How can I create a list of strings? I'm trying to make a chat with a robot. I put 2 labels. And my code is:
Dim mylist As New List(Of String)
mylist = "hello", "bye"
If Not Label1.Text = mylist Then
[code].....
i have a list of strings
Public baseList As New List(Of String)
That I fill with a list of base words, but I now need to build a new list of words in which will contain a list of every combination of words in the baseList (given that each string is less than the maximum length i specify)For Example if baseList contains
horse
at
ten
football
and the maximum string length is set to 10, the finalList would contain
horse
horseat
horseten
horseatten
[code]....
how to build finalList from baseList?
In .NET which data type do you use to store list of strings ?Currently I'm using List(Of String) because it's easier than Array to manage and add/remove stuff. I'm trying to understand what are the other options, when they become handy and when I should avoid List(Of String) usage.
View 4 RepliesI've build a list of Strings from files. The list itself is working fine (tried it by having ListBoxes and other controls loading its items from there just to make sure that this is not the issue). Now, I am using this list of strings to compare a Text in a TextBox1 while typing to determine if this TextBox1.Text already exists in the list. I am using the following code (where "s" stands for my List items):
Private Sub TextBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.TextLength < "1" Then
Button6.Enabled = False
ToolStripStatusLabel1.Image = My.Resources.pic_Add_Warning
ToolStripStatusLabel1.ForeColor = Color.Red
[Code] .....
What would be the easiest way for me to create a list of words with a sequential number appended to the string. I need the string and amount of numbers to be a variable. For example:
network1
network2
network3
network4
[Code].....
I am currently working on a family project which is based on "Who Wants To Be A Millionaire?" show. There is a huge diffrence between the show and my project. My project is a christmas edition and the goal is not to get money or something, since I will not add it... Erhmm... Let me get to the point. I have already designed a layout and scripted some things. I have about thirty questions but I do not want them to always spawn in the same array, if you know what I mean. I want the program to randomly choose one of those thirty questions and NEVER choose the same question in the same program run. By the way, there are four options on my project: A, B, C and D. I have got everything, I just need a code.
View 3 RepliesI'm having issues with returning a list of strings of the .Value of a Linq query:
Dim details = <Details>
<Vector size="5">
<Item>Syntactic Structures</Item>
<Item>Introduction</Item>
<Item>The Independence of Grammar</Item>
[Code]...
Is correct in that it returns the list of XElements I want (items 1 - 4, base 0), but I really just need a list of strings for the .Value of those XElements. Maybe I'm just dense here, but anything I've tried in the chapterTitles query isn't working (appending with .ToList.ToString, etc.). details.<Vector>.<Item>.Skip(1).Take(4).Value just returns the first XElement's value.
The following code loops through files in a directory as strings using FilePath.
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I have a specialized string dictionary of (string, string) (_RulesAndTheirDescriptions) that contains the name (key) and description (value) of methods in a given class. I currently do the following query to search for a match on the key or value and then bind that to a grid.
[Code]...