Collection(Of T) A 0-based Array Or 1-based Array?
Feb 26, 2009If it's 0-based, how can we add a placeholder to make it 1-based?
View 4 RepliesIf it's 0-based, how can we add a placeholder to make it 1-based?
View 4 Repliesi have an array contains a-z.Then i have a textbox and when click on the button, it will replace the text inside the textbox to the index number of the array.Example, from "abc" will become "0 1 2" The code below do the job.how to do so that i can replace the text inside the textbox from "0 1 2" back to "abc" based on the array?
Dim txtKey As String = readKeyTxt.Text
readKeyTxt.Text = ""
For Each b As String In txtKey[code].....
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.
Supposed that I have two arrays:
Dim RoomName() As String = {(RoomA), (RoomB), (RoomC), (RoomD), (RoomE)}
Dim RoomType() As Integer = {1, 2, 2, 2, 1}
I want to get a value from the "RoomName" array based on a criteria of "RoomType" array. For example, I want to get a "RoomName" with "RoomType = 2", so the algorithm should randomize the index of the array that the "RoomType" is "2", and get a single value range from index "1-3" only.
I have 10 constant arrays of data that can be used throughout the program.[code]I also have an array that needs to be populated randomly depending on user input.array_user(8)If the user selects 3 for instance...I need the data in array_user to be populated by the data in array03.I know I can do that with if/then statements...but I'm sure there is a much simpler way to do it.
View 1 RepliesI have a array based on a structure that I want to build a datatable from. Here is what my structure looks like currently,
Public Structure QRQFiles
Public Complex As String
Public DescriptiveName As String[code]....
Since I have a structure with in the structure will I have to define two datatables to represent this?
I have a SQL database which I'm running a query against to return a list of names - eg using "select names from table"I would like to add all of these names to an array so I can use them later. To do this I would need to use a dynamic array as the number of names returned could be anything.Apart from first running "select count(names) from table", getting a value and then Redim'ing the array on the count is there another method I can use.I've seen there's a dataset row.count? Can I somehow use this?
connection.Open()
reader = command.ExecuteReader()
While reader.Read()
[code]....
I want to sort the individuals according to their fitness values descending.
' Declaring a structure
Public Structure AnIndividual
Dim XCoord() As Integer
Dim YCoord() As Integer
Dim FitnessValue As Double
End Structure
[Code] .....
Each individual has a fitness function and has its own X and Y coordinates. I just want to say if individual six (for example) has the lowest fitness value then rank this individual the first one and so on for the rest of individuals.
Say I have a data file that was created in VB6 like this:
Dim arr As Variant
Dim unit As Integer
Dim i As Integer
unit = FreeFile
Open "SomeFile.dat" For Binary As unit
[Code]...
How can I assign a split parts of a string into an array list directly ?
View 1 RepliesArrayList is a generic structure. Let's say I have my own structure (contained of Boolean+string+int). I want to set a dynamic array based on my own structure. How....?
View 9 Replieshow to split a string into an array based on it's length?Say if I want the length to be 350 then every 350 chars in a textbox will be split into an array like [code]
View 14 RepliesI'm building some web service application based on wsdl schema. I don't know how to create array based on this schema. Array should collect data from Form where textboxes are bound to db table where they are stored as:
[Code]....
I am not sure how to phrase my question properly but I want to achieve something like this.
I have a class named Products public class Products
private ID as Integer
private Name as String
Public Property ProductID()
Get
Return ID
[Code]...
When I do the same, I am getting an error "Object Reference Not Set to an Instance of an Object.
I have a data table in a loop that adds rows on each loop. During the loop i collect an array of unknown size. At the end of the loop i want to add a new row to the datatable with eachelement of the array as a field.[code]I could hard code this if i knew how many item would be in the array but i dont.Is there any way i can loop through the array and append the value to a row?
View 8 RepliesI have a query I'm using to identify a group of contracts that have expired. The query has a ContractID, Status, Start Date and End Date. For each contract, I need to go to a directory and search for a file to import. That part works just fine, but how can I put a qualifier in to check for contracts that have the same start and end date? Do I need to create a multi-dimensional array for this or can I use the query I have? The part in bold text is where I need to identify identical start/end dates. Comments identify pieces to be developed and message boxes to help me confirm what's happening as I run the code:
Private Sub cmdRefreshList_Click()
DoCmd.SetWarnings False
'Create an array based on the true-up contract IDs.
Dim db As Database, TUrst, PYMTrst As Recordset
Dim TUContracts() As Variant
Dim TUContractID As Variant
[code]....
how to write the code for my project.I am to base my new project on an existing one(existing one has code that works 100%)and create an Array of a structure that bascially holds the information from a summary form AND the totals from an AddToOrder_Click event. If you are still with me)... I cant figure out what the code is for my structure and Array so that I STILL have a Summary Form but I have an array that shows when I click my PrintPreview. So an Array is basically a "space" that holds information, like my summary form except it doesnt show until I click PrintPreview right?
If I just wanted to show the table then my code belongs in the PrintDocument1_PrintPage to show the array but the actual structure code belongs in the Click_Event of my AddToOrder? Please Please understand I AM NOT asking for anyone to write my code, basically I am asking for some clarification on what exactly creating an array from a structure is and therefore determing where the structure is to be placed in my code..
I currently for the life of me can not get this to work.[code]Days(num).openTime(0) = New Date() 'Which gives the same error as openTime @ 0 has not been created as an array object (I'm assuming)Which leaves me completely lost because I've never had issues assigning initializing 1-dimensional arrays but this i just confusing the heck outta me. If anyone knows how I can initialize the 2nd part of the array (Days(num).openTime(0)) I would love to learn from you.
View 1 RepliesI have a query in Access 07 that identifies the following fields: ContractID, status, start date and end date. For each contract, I've been able to search a network share and upload its corresponding file; however I need to skip the import and write a record to a table for contracts with the same start and end date. I've included a placeholder (in bold below), but how do I make the date comparison work? Do I need to create a multi-dimensional array for that or can it be done with the code I have?
Private Sub cmdRefreshList_Click()
DoCmd.SetWarnings False
'Create an array based on the true-up contract IDs.
[code]....
I am looking to convert an integer into a boolean array where each item in the array corresponds to a bit in the binary representation of the integer.
MyInteger = 3 '011 in binary
to
MyArray(2) = False
MyArray(1) = True
MyArray(0) = True
Also is there anyway to assign a value to an Integer in binary or hex (like MyInteger = 1010b or MyInteger = A7h)?
I need help in defining an Multi-dimensional array which will update based on the value passed by the user [code] I nesd to pass the value to an array of where I want to add Project, for example If i want to add (Project) under Customer2 table the array gets updated and adds an entry in Customer 2 table which will look like [code]
View 3 RepliesI've created a program that requires students to answer addition questions.I have the code so that it calculates if the answer is correct, along with outputing the correct answer into a textbox.If the answer is correct the textbox background colour changes to green.If the answer is inocrrect the textbox background colour changes to red.I've done this using an array, and I want to use this array to calculate how many questions the students have answered correctly, and output them onto another page.I'm not sure is something like this would work:I was thinking about giving the textbox that outputs the grade score a value of 10. For every red box that is highlighted, 1 is taken away from the texbox value, outputting the amount of questions the user has answered correctly.Here is my array so far, not including the ability to output how many answers the student has answered correctly.
Public Num1(10), Num2(10) As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
i am very new to VB and have been trying to make a hangman game. I was wandering if there is a way to add multiple label boxes to a form based on the size of an array. For example a user inputs the word h-e-l-l-o in a input box that word is then split and put into an array(arrword) then i want the main form to appear with 5 label boxes each one containing a letter that from the array(arrword)
View 8 RepliesI would like to format output to a property of a custom control I have made.For instance I have a literal control in my control and when populated I want to check if it is longer than 30 characters long, if so, then go to the next space (as to not cut the word off) after the 30th character and place a <br /> tag in to place the next 30 characters on the next line.So if there were 100 characters in a string, there would be 3 line breaks in the label.I have the looping worked out to get the label populated but cannot get how to dymaically create the array based on the string lenth property and index of method.
View 7 RepliesIn VB.Net is every ObjectCollection Zero based except 'Collection' object itself ???
Like if you have an ObjectCollection like attachments for a mail for example, which has .Count in it, then i have seen it is Zero based
But in case of the 'Collection' object it is 1 based. 'ie dim cc as new Collection.
I am just confirming this because you can't keep checking for each collection of objects if it is zero based or 1 based, because if you use the For...Next loop, then do we have to think always if it is
For iItem=0 to ObjectCollection.Count-1
-OR-
For iItem=1 to ObjectCollection.Count
Haveing troubles with an assignment. I am writting code that will allow user to enter a score and the program returns a grade based on the score entered. I can get it to work using "IF" statements but want to use code for ranges. My "IF" code is as follows.......
[Code]...
randomly select a single student out of the student array based on their subscript number. This will be accomplished by the following:
[Code]...
I am populating a datagridview not with a datatable but with a list of instances of a class I created. The data for the instances is read from a database.
Looks like this:
Public Function GetSecurities() As System.Collections.Generic.List(Of Security)
Dim com As New SqlCommand
Dim rdr As SqlDataReader
[Code]....
I get the following string expression provided:"ChildObject.FullName" ...where ChildObject is an instance property on the MyObject1 type.ChildObject has a property named "FullName" and I want to sort a collection of type "MyObject1" based on this child properties "FullName" value.
I can do this all day long on properties directly on MyObject1 but I run into 2 challanges when doing it on a child instance and I can't get all the pieces working. The main 2 challanges are:
MyObject1 has a few different child property types so I can't hardcode the type for ChildObject. The string could be of any type.The sort expression is a String and not a known type.Above the value returned from the last line in the expression (if I run the code outsode the OrderBy method, does provide me the 'FullName' information I need. So the code must be close, but it still does not work.
Any ideas on how I can accomplish this? What I am trying to prevent is hardcoding a series of 'If' blocks on the child's type to then hardcode in its type to the sort or OrderBy method.
I am creating a project in VB.NET in which one of the reports require that the name of employees should be displayed as column names and whatever work they have done for a stated period should appear in rows below that particular column.Now as it is clear, the columns will have to be added at runtime. Am using an ODBC Data source to populate the grid. Also since a loop will have to be done to find out the work done by employees individually, so the number of rows under one column might be less or more than the rows in the next column.Is there a way to create an empty data table and then update its contents based on columns and not add data based on addition of new rows.
View 1 Replies