Error Reading String Into Array
Sep 28, 2011
I'm in the process of creating a tile based game. This game requires a method to load a text file and write the numbers between the delimiter "-", to a multidimensional array. However, an error message "object not set to an instance occurs. [code]...
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Mar 11, 2010
It's a list of computer systems, basically, that the user can purchase.I need to read this file, line-by-line, into an array. Let's call this array csvline().The first line of the text file would stored in csvline(0). Line two would be stored in csvline(1). And so on.(I've started with zero because that's where VB starts its arrays). A drop-down list would then enable the user to select 1, 2 or 3 (or however many lines/systems are stored in the file). Upon selecting a number - say, 1 - csvline(0) would be displayed inside a textbox (textbox1, let's say). If 2 was selected, csvline(1) would be displayed, and so on.
It's not the formatting I need help with, though; that's the easy part. I just need someone to help teach me how to read a CSV file line-by-line, putting each line into a string array - csvlines(count) - then increment count by one so that the next line is read into another slot.So far, I've been able to paste the numbers of each system into an combobox:
Using csvfileparser As New Microsoft.VisualBasic.FileIO.TextFieldParser _
("F:folderprogramnameprogramnameinDebugsystems.csv")
Dim csvalue As String()
[code].....
But this only selects individual values. I need to figure out how selecting one of these numbers in the combobox can trigger textbox1 to be appended with just that line (I can handle the formatting, using the string.format stuff). If I try to do this using csvalue = csvtranslator.ReadLine , I get the following error message:"Error 1 Value of type 'String' cannot be converted to '1-dimensional array of String'."If I then put it as an array, ie: csvalue() = csvtranslator.ReadLine , I then get a different error message:"Error 1 Number of indices is less than the number of dimensions of the indexed array.
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Sep 7, 2011
I can write a 1-d string array to file with:
Dim test() As String = {1, 2, 3, 4, 5}
File.WriteAllLines("C:MyFile.txt", test)
but can't see how to write a 2-d array to file.
I've tried this:
Dim test(,) As String = {{1, 2, 3, 4, 5}, {34, 22, 12, 33, 55}}
Dim myfile = File.CreateText("C:MyFile.txt")
Dim row, col As Integer
[Code].....
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Sep 29, 2008
[Code] As you can see, the code in the client side calls a function in the Server that generates an array as output. And this output SHOULD be loaded into the new array that was created in the client side. The case is that it is not allowing me to do that. The blue underlined row gives me the following error: Value of type 'ClientTest.TestService.ArrayOfString' cannot be converted to '1-dimensional array of String'.
I cannot see what is wrong, the function generates the same output type as the new var that is expecting to load it. Why data cannot be 'converted'? And what would be the solution to turnaround this problem? PS: Actually my function is a bit more complex than that and evolves a DB query, etc, but I reduced its code to simplify as the problem is occurring just in the array transfer.
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Apr 12, 2011
I have been working on an activeX control which works on serial port communication. Now I have completed the project and created its setup.exe using Visual studio 6 -> Tools -> Package and Deployment Wizard. Then I installed the control in another PC and in a new project included the control using project -> components. But when I click on the control in the toolbox and then include on the form it gives the following error : delete current link ? and on clicking OK, nothing happens. I tried searching a lot on google but didnt find anything. Another problem is that I have created a string array as a global array which can be accessed by all the methods.I am able to include the same activex control in my own pc when I have created the project. Here it works fine, I am able to access all the methods that I coded in the control, but the String array mentioned above can be accessed in other project. I tried writing Public before the array declaration but it give me the compile error : "Constants. fixed length strings, arrays, user defined types and Declare statements not allowed as Public members of object module." [code]
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Aug 5, 2009
Previously I'm able to read the csv with the format of
Diode,,,
,,,Vf1_FT
TestCond,,,
Spec Min,,,-
[code]....
into 2D array where i can display data(x,y).But with this format below in csv file,
Diode,,,,,,,,,Vf1_FT,,Vf2_FT,TestCond,,,,,,Spec Min,,,-,,-,Spec Max,,,0.715,0.82,DUT#,,Bin#,V,,V,1,P,1,0.217154,P,0.281562,P2,P,1,0.245273,P,0.580057,P,3,P,1,0.8140 7,P,0.279079,P,4,P,1,0.233167,P,0.278402,P,5,1,0.252264,P,0.277499,P,6,P,1,0.231662,P,0.476897,P,7,P ,1,0.910909,P,0.27622,P,8,P,1,0.280232,P,0.775618,P,9,P,1,0.229555,P,0.275167,P,10,P,1,0.279179,P,0. 274715,P
,,,,,,
where there is no new line for each rows, I'm only able to read it in 1D where. Is it a way to read it in 2D way? Where I can read Vf1_FT and Vf2_FT?
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Jun 10, 2011
im having trouble reading in lines of data using arrays and a structure. I believe my main problem is figuring out how to keep track of the lines read in, even if the whole array size isnt used up. Also, To break up each line I am trying to use the split function to seperate spaces, but dont know if im doing so correctly.[code]
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May 16, 2012
im really new to vb.net and really need to finish this project.So what i want to do is read from a .txt file.This file has loads of proxy IP addresses and is stored in this form, (as a list) i want to (using an array most probably) be able to select one proxy off the list in the txt file. I then want a variable that i can change so that i can hook it up to a timer so i can change the proxy every thirty seconds or so.(does not have to be random selection, what ever is easiest)
The underlined txt is what i need help with, i can do the rest myself, this is my code although it probably would be a good idea to start over because im un sure what i am doing
[Code]...
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Mar 1, 2012
Im doing some work right now for a class and this is my first time ever using arrays and im having some trouble. I need to make a program that places the names in an array using a text file and displays all presidents for a requested range of numbers. every time i try and run the program it says "Object reference not set to an instance of an object." but im not really sure what that means, Heres the code
Public Class frmPresidents
Dim numLow As Integer, numHigh As Integer, Pres() As String
Private Sub btnPresidents_Click(ByVal sender As System.Object, ByVal e As
[Code]....
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