I am trying to get the data from the text file to load into an array of structures and then be displayed in a listbox on FormLoad with no luck, all I get is a blank listbox.
Code:
Public Class frmMemList
'Create a structure to which data from text file MEMBERPHONES.TXT will be read.
Structure MemberList
[code]....
I am really struggling lately for some reason. I do not know why, but I can not get simple programming code to work, usually due to simple mistakes. Anyway, enough about that.Here is my code, I am trying to get the data from the text file to load into an array of structures and then be displayed in a listbox on F
Public Class frmMemList
'Create a structure to which data from text file MEMBERPHONES.TXT will be read.
Structure MemberList
[code].....
�On load read data from units.txt into an array of structures;�Allow the user to choose a major and then add units to a study plan.Note your program must not allow the user to add units not in the major and a unit can only be added once to a study plan;�Save student first name & last name, student number, unit codes to a user selected file (e.g. fred.txt); �Allow the user to select a student file to load using a common dialog control ;�Display the units for that student.
The program must have the following features:�It must use a common dialog control for saving data;�The program must have at least one general procedure; �The program must demonstrate the use of an array (array of structures recommended).I've attached a copy of the text file needed to be loaded.
I need to create a collection of millions of objects, each object has 3 double and one integer fields.If I remember (after more than 20 years without using C) in C you would allocate enough memory using a struct and an array, and read all the file content in one shot.In VB I created a class with the 4 members, and this constructor:
Sub New(BR As IO.BinaryReader)
X = BR.ReadDouble
Y = BR.ReadDouble
[code]....
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]...
I have a text file, with several lines of comma delimited data. The easy part is that each item fits into the same field, so I can use a 2 dimensional array. I would like to use .net classes to do this, not the old file handling functions I was used to.How can I take the text file and load the data in the text file into a 2 dimensional array.Here is example data in test.txt
1,1,1,2,2,2,1,1,1,3,3,3,4,4
2,3,4,5,1,1,1,2,3,4,5,1,1,1
2,3,4,5,6,1,1,1,1,2,2,3,3,4
So this would go into a (14,3) array.I would like to make sure, that the array is automatically sized to the size of the data also.
I have a text file with the following information:
-----------------------------------------------
Model: Accord
Manufacturer: Honda
Year: 2004
VIN: FJ235FJSLO323434DJS
[Code].....
how to setup my loop to insert the text data into my struct array.
These are the directions for the assignment.So far I am able to get the file read and printed onto a list box.The book we have for the class does not clearly talk about using the array of structure method with formatting an imported text file.After that I'm pretty much having a bit of trouble with everything else.I know I can figure most of it out but what I'm having a big amount of trouble with is the array of structures that he wants.I know that when I have the file imported that I need to save it temporarily and go through it and at every ":" put it in an array and save that spot and then keep scanning through the file. I know it is going to be a for loop using the index to count through but I'm not sure if how to start it.This is how the text file that he wants sorted out looks.
Ally Gators:Tim Tebow:240:280:250
Ally Gators:Albert Gator:150:175:222
Ally Gators:Joe Cool:195:220:217[code]...........
I have a datagridview which have 5 columns. The name of the columns are T,C,F,S,H. [cod]e...
So i want to display this data in datagried view. I must display the number beside T to T column, the number beside C to C column and so on. It should only display number in the respective column. It should not display the T,C and so on. [code]...
I have a datagridview which have 5 columns. The name of the columns are T,C,F,S,H.
I have a text file which contain lines like this.
T240C3.175F012S27H2000
T239C0.95F034S55H1000
T236C1.2F029S48H2000
T234C1.6F029S48H2000
So i want to display this data in datagried view. I must display the number beside T to T column, the number beside C to C column and so on. It should only display number in the respective column. It should not display the T,C and so on.
I have the option to save the contents of the listview that was saved into text file.now i would like to load the text file into datagridview in vb.net but i have no idea how to do it as this is my first time in doing it and i had googled around but couldn't find the information i needed.
View 11 Replies1) How can i load data from Text file to DatagridView.I Want it because i'm making a lister. And when i load a data from text file, i want to edit rows. And this calling the second question.
2) How can i save data, Datagrid to Text file.
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I have a text file in which there is a list which is composed as follows:
3236, Alberto
5894, Peter
7894: Alonso
and so on ...
What I want is loaded into a listbox the numbers to the first semicolon and load the combobox names.
I'm using the following code to import data from a text file into an existing Access table:
[Code]...
The first time i ran the code, it caused no error but no records where loaded into the table. The second time it causes the OleDbException "Table 'TEMP' already exists."explain me wath am i doing wrong? The text file is comma delimited and it has exactly the same number of columns of the TEMP table.
i have problem to load the data text file that i saved because i am out of the index ,where is the index that stops me?
View 14 RepliesI need to load and parse a text file and extract data between points on any given line. I can load the file, but it's the parsing that's giving me headaches. e.g. "Phoned Jim and arranged for John to attend site" First I need to search for "Phoned" because the line always starts with that, and then I need to extract "Jim and arranged for John"
[Code]....
I'm working on something whereby I write and read alot of data to disk directly as bytes. But I can't figure out a foolproof way of delineating data structures chained in a single file. A null byte obviously wouldn't cut it, because that could occur within the data structures themselves. Theoretically, any pattern of bytes can potentially occur within a data structure. Does anyone have any ideas for a byte pattern that I could use as a flag for my streamreader? Anything reasonably short, since it's going to be pretty complex, streaming through each file twice, once byte by byte to find the flags and again to split the stream.
View 10 RepliesI have a csv text file, shown below that I want to edit based on user inputs. When the user wants to change the current price of a stock, they enter the stock name, and the new price. When the button is clicked, VB needs to find the appropriate stock, and then change the current price.The data needs to be pulled from the text file into a temporary file, changed, then the temp file needs to be renamed to the original file name and the original file deleted.This is the only part of the program I can not figure out. I have put my program code here as well. The click event that I need this to work on is: Private Sub btnUpdateStock_Click --- I have been playing with code in that section, so that's why there si abunch of crazey code there.
[code]...
I am doing system to read text file it contain numbers and I want to read this data to multi array , the description as :-
This site here :-
DataSet format
My data looks like that :-
20 3 10
10
10
10
0
0
0
0
0
1
1
1
1
1
0
1
0
Code: Attached File(s)
Dataset.txt (246.44K)
Number of downloads: 30
IM trying to write data from an array to a text file. what has confused me is how to write data from an array which has a structure.
View 2 RepliesI have been searching and searching and cannot find out how to do what I'm looking to do, that is the only reason I would post a new thread.[code]...
After reading the file, I want to load the NameId, the ColourId and the Text into a multidimensional array. Anything I have found about loading into an array shows text being separated by small delimiters like commas, but this I cannot do because I need to use this format. What I am wanting to do is load all of the NameId's into a listbox and when a certain NameId is selected, it will bring up the Text in a TextBox and the Colour value in a ComboBox.
I'm trying to build something called a structure which will store data it retrieves from a text file. I have the structure set up like this:
Structure Employee
Dim FirstName As String
Dim LastName As String
Dim ID As String
Dim Hours As Integer
Dim Wage As Decimal
Dim EarnedPay As Decimal
End Structure
[Code] .....
How to set these operations up?
I am having trouble turning a set of data from a .txt file into arrays, basically, what i have in the text file is:
Eddy vbtab 20
Andy vbtab 30
James vbtab 20
I am using visual basic 2008 and trying to create an application to plot data from text files. I have several data files of various sizes. They have an unknown number of rows and either 2 or 4 columns.I need to put the data into 2 dimensional array, so value(,) becomes either value(lines,3) or value(lines,1) depending on the number of columns.My program needs to be able to count how many columns there are, and redim value(,) appropriately.I have written a piece of code to count the number of lines (rows) in the file using 'While not (EOF(1)) ....' but I'm stuck on how to count the number of columns.I could ask the user to indicate how many columns there are before the file is read, but I would prefer the program to detect the number automatically.
View 1 RepliesI'm new to .net. I would like to know how to convert a text data in string or in a file into a simple byte array[ ] format.
View 3 RepliesI have a Structure, and I am having trouble initialising it. Specifically when I try to populate the Vector3 variables, it tells me that they are Nothing, so I need to make them New when the array of this structure is declared.[code]Structures cannot declare a non-shared 'Sub New' with no parameters.I have no parameter to supply, and this will be an array so I'm not even sure how I would supply it.The second option to fix the error is to make the Sub New shared, but then I get other errors: Cannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class.Does anyone know how I can resolve this. My end goal is to have an array of this structure type with the Vector3s ready to use.
View 6 RepliesI need to have an Array of UDTs(Structures). Elements have to be added (at end) and removed (from anywhere). The different values of the elements need to be changeable.
I know how to implement it as an oldstyle array, but wouldn't it be better to implement as a List ( of T)? and if yes is such a procedure possible?[code...]
I have 2 Structures
Public Structure One
Public ItemOne As String
Public ItemTwo As Integer
End Structure
[Code]...
Results In an Unhandled exception. Bad Record Length. and then If I close it and reopen it I get an 'Unable to read beyond end of stream' error. So what is the best way to save an array of structures? Binary Reader/Writer? and why does this way not work (Even if its derived from VB6)
I have an array of structures:
Structure stCar
Dim Name As String
[code].....
I have a class file which contains a structure like this.
<StructLayout(LayoutKind.Explicit)> _
Public Structure SampleStructure
<FieldOffset(0)> Public field1 As Int16
[Code]......