I'm new to programming and I thought it would be great to start with something a bit simple but useful for me and my girlfriend.
I would like to create a shopping list program that will take my items that I input into the textbox and then sort them based on defined groups. Then output that information in an easy to read list already categorized for easy shopping.
My question is this; How do I sort information that I put into a rich textbox? I have two rich textboxes and I would like to input information into one and then output that information to the other but have it sorted to my preferences.
Thank you in advance. :-)
Since you want to group them, I would suggest creating a small GroceryItem like this:
class GroceryItem
{
GroceryItem(string category, string name) {
Category = category;
ItemName = name;
}
public string Category {get;set;}
public string ItemName {get;set;}
}
Then you can easily parse from your first text box the items. Let's assume they look like this:
Vegies, Tomato
Meat, Lamb
Vegies, Potato
Meat, Chicken
Just read them all, split on , to get 2 parts for each, and create a new GroceryItem:
List<CategoryItem> shoppingList = new List<CategoryItem>();
foreach (var line in your_lines_collection)
{
var parts = some_line.Split(',');
shoppingList.Add(new GroceryITem(parts[0],parts[1]));
}
And last, but not least, once you have a list of those (shoppingList), you can use linq to sort to your heart content. Here's an example:
List<GroceryItem> shoppingList = new List<GroceryItem>();
List<string> groceries = new List<string>(){"veg, pot", "veg, tom", "meat, chicken", "meat, veal"};
foreach (var line in groceries)
{
var parts = line.Split(',');
shoppingList.Add(new GroceryItem(parts[0],parts[1]));
}
var sorted_list_by_ItemName =
from item in shoppingList
orderby item.ItemName
group item by item.Category into groups
select groups
;
foreach (var gr in sorted_list_by_ItemName)
{
Console.Out.WriteLine("[{0}] :", gr.Key);
foreach (var it in gr)
Console.Out.WriteLine(" {0}", it);
}
This will output:
[meat] :
meat , chicken
meat , veal
[veg] :
veg , pot
veg , tom
You then can just print this on your other textbox, or work with it as you wish :)
As per comments, here's the whole code for a console, just paste it into your visual studio, and it should work:
using System;
using System.Collections.Generic;
using System.Linq;
internal class Program
{
public static void Main(string[] args)
{
List<GroceryItem> shoppingList = new List<GroceryItem>();
List<string> groceries = new List<string>() { "veg, pot", "veg, tom", "meat, chicken", "meat, veal" };
foreach (var line in groceries)
{
var parts = line.Split(',');
shoppingList.Add(new GroceryItem(parts[0], parts[1]));
}
var sorted_list_by_ItemName =
from item in shoppingList
orderby item.ItemName
group item by item.Category into groups
select groups;
foreach (var gr in sorted_list_by_ItemName)
{
Console.Out.WriteLine("[{0}] :", gr.Key);
foreach (var it in gr)
Console.Out.WriteLine(" {0}", it);
}
Console.ReadKey();
}
public class GroceryItem
{
public GroceryItem(string category, string name)
{
Category = category;
ItemName = name;
}
public string Category { get; set; }
public string ItemName { get; set; }
public override string ToString()
{
return Category + " , " + ItemName;
}
}
}
To avoid an ongoing ping pong, if you have another question, just open a new one (if it's relevant). Otherwise, you can upvote,downvote, and mark as answered if this answered your question. :)
Well, if your first RichTextBox has each item separated by something known (e.g. NewLine), then it should be as straight forward as this:
var list = richTextBox1.Text
.Split(new[] { Environment.NewLine },
StringSplitOptions.RemoveEmptyEntries)
.Sort();
richTextBox2.Text = string.Join(Environment.NewLine, list.ToArray());
This will leverage the default sorting algorithm for the type. In this case string. So it will sort them alphabetically.
Related
I have a problem with C#.
I managed it to parse out the price of a material from a web page (with a list of materials and prices) but I don't know exactly how I can extract single values to single strings or ints. I have assigned the "price" to a string but it this string contains a array of values.
Here's the C# Code:
var products = htmlDocument.DocumentNode.Descendants("div")
.Where(node => node.GetAttributeValue("id", "")
.Equals("accordion1")).ToList();
var productListItems = products[0].Descendants("tr")
.Where(node => node.GetAttributeValue("data-name", "")
.Contains("")).ToList();
foreach (var productListItem in productListItems)
{
Console.WriteLine(productListItem.GetAttributeValue("data-name", ""));
var tds = productListItem.Descendants("td").ToList();
var name = tds[0].InnerText;
var price = tds[1].InnerText.Trim('$');
Console.WriteLine(name);
Console.WriteLine(price);
}
Console:
clay_r
Lehm
199
coal_r
Kohle
427
copper_r
Kupfer
312
etc.
Now I want, that I can call a single material (like clay) with a single string. So that I have for every materialPrice a int.
Something like:
int clayPrice = int.Parse(the first price)
int coalPrice = int.Parse(the second price)
int copperPrice = int.Parse(the third price)
etc.
I'm pretty new to C#, so I don't know much about it. I hope someone understands my problem and can help me.
Define a separate class that contains the pricing information.
For example:
public class PriceInfo
{
public string Name {get; set;}
public string RawPrice {get; set;}
public int Price => int.Parse(RawPrice.Trim('$'));
}
Define a Dictionary as a class member. Dictionary.
Dictionary<string, PriceInfo> priceData = new Dictionary<string, PriceInfo>();
In your loop, add the prices to the dictionary.
foreach (var productListItem in productListItems)
{
Console.WriteLine(productListItem.GetAttributeValue("data-name", ""));
var tds = productListItem.Descendants("td").ToList();
var name = tds[0].InnerText;
var price = tds[1].InnerText;
// add to Dictionary
priceData[name] = new PriceInfo
{
Name = name,
RawPrice = price
};
}
Use the value:
priceData["somename"].Price
I have a list of most of the elements in the periodic table in order of their placement on the table:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Chemistry_Element_Calculator
{
class Program
{
static void Main(string[] args)
{
// Declare all numbers
int electronNumber;
int protonNumber;
float neutronNumber;
int i;
// Declare all strings
string elementRequest;
// Create an list for all elements
List<string> elementNameList = new List<string>();
List<string> elementSymbolList = new List<string>();
// Add all elements to the list
elementNameList.Add("Hydrogen"); elementSymbolList.Add("H");
elementNameList.Add("Helium"); elementSymbolList.Add("He");
elementNameList.Add("Lithium"); elementSymbolList.Add("Li");
elementNameList.Add("Beryllium"); elementSymbolList.Add("Be");
elementNameList.Add("Boron"); elementSymbolList.Add("B");
elementNameList.Add("Carbon"); elementSymbolList.Add("C");
elementNameList.Add("Nitrogen"); elementSymbolList.Add("N");
elementNameList.Add("Oxygen"); elementSymbolList.Add("O");
elementNameList.Add("Fluorine"); elementSymbolList.Add("F");
elementNameList.Add("Neon"); elementSymbolList.Add("Ne");
elementNameList.Add("Sodium"); elementSymbolList.Add("Na");
elementNameList.Add("Magnesium"); elementSymbolList.Add("Mg");
elementNameList.Add("Aluminium"); elementSymbolList.Add("Al");
elementNameList.Add("Silicon"); elementSymbolList.Add("Si");
elementNameList.Add("Phosphorus"); elementSymbolList.Add("P");
elementNameList.Add("Sulfur"); elementSymbolList.Add("S");
elementNameList.Add("Chlorine"); elementSymbolList.Add("Cl");
elementNameList.Add("Argon"); elementSymbolList.Add("Ar");
elementNameList.Add("Potassium"); elementSymbolList.Add("K");
elementNameList.Add("Calcium"); elementSymbolList.Add("Ca");
elementNameList.Add("Scandium"); elementSymbolList.Add("Sc");
elementNameList.Add("Titanium"); elementSymbolList.Add("Ti");
elementNameList.Add("Vanadium"); elementSymbolList.Add("V");
elementNameList.Add("Chromium"); elementSymbolList.Add("Cr");
elementNameList.Add("Manganese"); elementSymbolList.Add("Mn");
elementNameList.Add("Iron"); elementSymbolList.Add("Fe");
elementNameList.Add("Cobalt"); elementSymbolList.Add("Co");
elementNameList.Add("Nickel"); elementSymbolList.Add("Ni");
elementNameList.Add("Copper"); elementSymbolList.Add("Cu");
elementNameList.Add("Zinc"); elementSymbolList.Add("Zn");
elementNameList.Add("Gallium"); elementSymbolList.Add("Ga");
elementNameList.Add("Germanium"); elementSymbolList.Add("Ge");
elementNameList.Add("Arsenic"); elementSymbolList.Add("As");
elementNameList.Add("Selenium"); elementSymbolList.Add("Se");
elementNameList.Add("Bromine"); elementSymbolList.Add("Br");
elementNameList.Add("Krypton"); elementSymbolList.Add("Kr");
elementNameList.Add("Rubidium"); elementSymbolList.Add("Rb");
elementNameList.Add("Strontium"); elementSymbolList.Add("Sr");
elementNameList.Add("Yttrium"); elementSymbolList.Add("Y");
elementNameList.Add("Zirconium"); elementSymbolList.Add("Zr");
elementNameList.Add("Niobium"); elementSymbolList.Add("Nb");
elementNameList.Add("Molybdenum"); elementSymbolList.Add("Mo");
elementNameList.Add("Technetium"); elementSymbolList.Add("Tc");
elementNameList.Add("Rubidium"); elementSymbolList.Add("Ru");
elementNameList.Add("Rhodium"); elementSymbolList.Add("Rh");
elementNameList.Add("Palladium"); elementSymbolList.Add("Pd");
elementNameList.Add("Silver"); elementSymbolList.Add("Ag");
elementNameList.Add("Cadmium"); elementSymbolList.Add("Cd");
elementNameList.Add("Indium"); elementSymbolList.Add("In");
elementNameList.Add("Tin"); elementSymbolList.Add("Sn");
elementNameList.Add("Antimony"); elementSymbolList.Add("Sb");
elementNameList.Add("Tellurium"); elementSymbolList.Add("Te");
elementNameList.Add("Iodine"); elementSymbolList.Add("I");
elementNameList.Add("Xenon"); elementSymbolList.Add("Xe");
elementNameList.Add("Caesium"); elementSymbolList.Add("Cs");
elementNameList.Add("Barium"); elementSymbolList.Add("Ba");
elementNameList.Add("Lanthanum"); elementSymbolList.Add("La");
elementNameList.Add("Cerium"); elementSymbolList.Add("Ce");
elementNameList.Add("Praseodynium"); elementSymbolList.Add("Pr");
elementNameList.Add("Neodymium"); elementSymbolList.Add("Nd");
elementNameList.Add("Promethium"); elementSymbolList.Add("Pm");
elementNameList.Add("Samarium"); elementSymbolList.Add("Sm");
elementNameList.Add("Europium"); elementSymbolList.Add("Eu");
elementNameList.Add("Gadolinium"); elementSymbolList.Add("Gd");
elementNameList.Add("Terbium"); elementSymbolList.Add("Tb");
elementNameList.Add("Dysprosium"); elementSymbolList.Add("Dy");
elementNameList.Add("Holomium"); elementSymbolList.Add("Ho");
elementNameList.Add("Erbium"); elementSymbolList.Add("Er");
elementNameList.Add("Thulium"); elementSymbolList.Add("Tm");
elementNameList.Add("Ytterbium"); elementSymbolList.Add("Yb");
elementNameList.Add("Lutenium"); elementSymbolList.Add("Lu");
elementNameList.Add("Hafnium"); elementSymbolList.Add("Hf");
elementNameList.Add("Tantalum"); elementSymbolList.Add("Ta");
elementNameList.Add("Tungsten"); elementSymbolList.Add("W");
elementNameList.Add("Rhenium"); elementSymbolList.Add("Re");
elementNameList.Add("Osmium"); elementSymbolList.Add("Os");
elementNameList.Add("Iridium"); elementSymbolList.Add("Ir");
elementNameList.Add("Platinum"); elementSymbolList.Add("Pt");
elementNameList.Add("Gold"); elementSymbolList.Add("Au");
elementNameList.Add("Mercury"); elementSymbolList.Add("Hg");
elementNameList.Add("Thallium"); elementSymbolList.Add("Tl");
elementNameList.Add("Lead"); elementSymbolList.Add("Pb");
elementNameList.Add("Bismuth"); elementSymbolList.Add("Bi");
elementNameList.Add("Polonium"); elementSymbolList.Add("Po");
elementNameList.Add("Astatine"); elementSymbolList.Add("At");
elementNameList.Add("Radon"); elementSymbolList.Add("Rn");
elementNameList.Add("Francium"); elementSymbolList.Add("Fr");
elementNameList.Add("Radium"); elementSymbolList.Add("Ra");
elementNameList.Add("Actinium"); elementSymbolList.Add("Ac");
elementNameList.Add("Thorium"); elementSymbolList.Add("Th");
elementNameList.Add("Palladium"); elementSymbolList.Add("Pa");
elementNameList.Add("Uranium"); elementSymbolList.Add("U");
elementNameList.Add("Nepturium"); elementSymbolList.Add("Np");
elementNameList.Add("Plutonium"); elementSymbolList.Add("Pu");
elementNameList.Add("Americium"); elementSymbolList.Add("Am");
elementNameList.Add("Curium"); elementSymbolList.Add("Cm");
elementNameList.Add("Berkelium"); elementSymbolList.Add("Bk");
elementNameList.Add("Californium"); elementSymbolList.Add("Cf");
elementNameList.Add("Einsteinium"); elementSymbolList.Add("Es");
elementNameList.Add("Fermium"); elementSymbolList.Add("Fermium");
elementNameList.Add("Mendelevium"); elementSymbolList.Add("Md");
elementNameList.Add("Nobelium"); elementSymbolList.Add("No");
elementNameList.Add("Lawrencium"); elementSymbolList.Add("Lr");
elementNameList.Add("Rutherfordium"); elementSymbolList.Add("Rf");
elementNameList.Add("Dubnium"); elementSymbolList.Add("Db");
elementNameList.Add("Seaborgium"); elementSymbolList.Add("Sg");
elementNameList.Add("Bohrium"); elementSymbolList.Add("Bh");
elementNameList.Add("Hassium"); elementSymbolList.Add("Hs");
elementNameList.Add("Meitnerium"); elementSymbolList.Add("Mt");
elementNameList.Add("Darmstadtium"); elementSymbolList.Add("Ds");
elementNameList.Add("Roentgenium"); elementSymbolList.Add("Rg");
elementNameList.Add("Copernicium"); elementSymbolList.Add("Cn");
Console.WriteLine("What element do you want? Either input it's full name, with a capital letter, or it's elemnent symbol. E.g. N for Nitrogen");
elementRequest = Console.ReadLine();
elementNameList.ForEach(delegate (String elementName)
{
if (elementRequest == elementName)
{
Console.WriteLine("Hydrogen");
}
else
{
Console.WriteLine("Not Hydrogen");
};
});
Console.Read();
However, when I run the program, and input Hydrogen, both Helium and Hydrogen are said to be hydrogen. How can I fix this?
Also, if anyone has an idea on how to compress the 2 lists so they're smaller, let me know :)
Thanks :)
What you want your code to do is take the index from the first list, and return the string at the same index in the second list.
Your code is currently not doing any of that, but always printing "Hydrogen", your output thus always being "Hydrogen" whatever element is requested.
You can trivially fix that by actually looking up the index:
int indexOfElementName = elementNameList.IndexOf(elementRequest);
string elementSymbol = elementSymbolList[indexOfElementName];
Note that that does not handle casing and requested elements that aren't in the list (or typos).
But keeping the two lists in sync, and this code in general, is a maintenance disaster waiting to happen.
Instead you could use a dictionary where the element name is the key and the symbol the value:
var elementDictionary = new Dictionary<string, string>
{
{ "Hydrogen", "H" },
{ "Helium", "He" },
// ...
}
Then look it up:
string elementSymbol = elementDictionary[elementRequest];
Do note that this still doesn't handle case-insensitivity and elements that are not found, but I'll leave that as an exercise to you.
I would use a custom class and a list as suggested by ElectricRouge.
I don't favor the dictionary because you need to search both by name and symbol. Also, the data set is small (118 elements to date).
See comments for the explanation of the code.
using System;
using System.Collections.Generic;
namespace Chemistry_Element_Calculator
{
// Create a chemical element class
// You can add more properties such as number of electrons, etc.
public class ChemicalElement
{
public string Symbol
{
get; set;
}
public string Name
{
get; set;
}
}
class Program
{
static void Main(string[] args)
{
// Create a list of the elements, populate their properties
var elements = new List<ChemicalElement>()
{
new ChemicalElement {Name = "Hydrogen", Symbol = "H"},
new ChemicalElement {Name = "Helium", Symbol = "He"},
new ChemicalElement {Name = "Lithium", Symbol = "Li"}
// etc.
};
Console.WriteLine("What element do you want? Either input it's full name, with a capital letter, or it's elemnent symbol. E.g. N for Nitrogen");
var elementRequest = Console.ReadLine();
// Use find to get a matching element, compare both name and symbol
var foundElement = elements.Find(element => element.Symbol == elementRequest || element.Name == elementRequest);
if (foundElement == null)
{
// Output if no element is found
Console.WriteLine("Element Not Found");
}
else
{
// Output if the element is found
Console.WriteLine("Found element {0}.", foundElement.Name);
}
Console.WriteLine("[Press any key to finish]");
Console.ReadKey();
}
}
}
The code uses the method List.Find to get the result, it will only return the first match.
I would also suggest to migrate to String.Compare if you want to have case-insensitive comparison.
And finally I would be reading the data form file or a database, but that is beyond the question.
I'm having a list of strings whit some values and I want to make some kind of variable for keeping code that I will be using in template file.
For example lets say I have list with this 3 string values: configService, scaleCoefConfigService, sessionService. Name of the list is chItemName.
And I need to generate this kind of code that I will parse later into template:
[Dependency("configService")]
[Dependency("scaleCoefConfigService")]
[Dependency("sessionService")]
So my question is can make some variable and mechanism for iterating thou list of strings that adds every single item from list to variable?
I've tried this:
foreach (var tp in controllerChecked)
{
var genCode = "[Dependency](" '"' + chItemName + '"'")] \n"
}
controllerChecked is collection of objects and one of the objects value is Name that I'm getting like this:
var chItemName = controllerChecked.Select(c => c.Name).ToList();
This is how the list chItemName is getting those strings.
But of course it is impossible to use + with lists and this kind of stuff will never work. Someone has better idea?
In your example, you are not using the tp variable, which contains will contain each of the values within controllerChecked, one at a time.
You could just iterate through the chItemName list and add the result to a StringBuilder:
StringBuilder codeBuilder = new StringBuilder();
foreach (string tp in chItemName)
{
codeBuilder.AppendLine("[Dependency(\"" + tp + "\")]");
}
string code = codeBuilder.ToString();
If controllerChecked contains more information, you could also directly access it:
StringBuilder codeBuilder = new StringBuilder();
foreach (var item in controllerChecked)
{
string propertyName = item.Name.SubString(1);
codeBuilder.AppendLine("[Dependency(\"" + item.Name + "\")]");
codeBuilder.AppendLine("public " + item.Type + " " + propertyName + " { get; set; }");
codeBuilder.AppendLine();
}
string code = codeBuilder.ToString();
PS. I would definitely change the name of chItemName to chItemNames as it is a list, but that is up to you of course.
This worked perfectly good. I have little bit harder version of this, if you can figure out how to do this:
Lets say that instead of one chItemName list I have 2 more: fName and chItemType, both are string lists.
And I have to generate this kind of code:
[Dependency("alarmsService")]
public IAlarmsService AlarmsService { get; set; }
[Dependency("jsonFactory")]
public IJSONFactoryService JsonFactory { get; set; }
[Dependency("dataBean")]
public IDataBean DataBean { get; set; }
alarmsServise, jsonFactory and dataBean are items of chItemName.
IAlarmsService, IJSONFactoryService and IDataBean are items of chItemType.
AlarmsService, Json Factory and DataBean are items of fName list.
fName is list that I got from chItemType by trimming the first letter from each string in list:
List<string> fName = new List<string>();
foreach(var i in chItemType)
{
var newName = i.Remove(0,1);
fName.Add(newName);
}
So only that list is not a part of controllerChecked list. The othere two are defined like this:
var chItemType = controllerChecked.Select(c => c.Type).ToList();
var chItemName = controllerChecked.Select(c => c.Name).ToList();
Can I edit foreach somehow or maybe I can make parts of code with StringBulider and after that merged them together?
Hi i have this structure of txt file:
Lukas 1
Zdenek 3
Martin 2
Kate 1
And i need load this data...the name i need load to comboBox...and when i choose from ComboBox for example Lukas, i need to save Name Lukas to variable Name and number 1 to variable Number...
It is possible?
I have this code now...
using (StreamReader reader = new StreamReader(#"C:\Us...nka\example.txt"))
{
string data = "";
data = reader.ReadToEnd().Trim();
}
But i need read separately Name and separately Number...Have you any ideas? Thanks..
You can use File.ReadLines and String.Split:
var lines = File.ReadLines(#"C:\Us...nka\example.txt");
var data = lines.Select(l => l.Split());
I would use a class to store both properties:
public class Person
{
public int PersonID { get; set; }
public string PersonName { get; set; }
}
Now you can load the persons in a loop or with LINQ:
List<Person> allPersons = data
.Where(arr => arr.Length >= 2 && arr[1].Trim().All(Char.IsDigit))
.Select(arr => new Person
{
PersonName = arr[0].Trim(),
PersonID = int.Parse(arr[1].Trim())
})
.ToList();
Edit:
Yes thanks...but i cant load PersonsName to combobox
You can use a BindingSource for the ComboBox. Then set the DisplayMember and ValueMember properties accordingly:
var bindingSourcePersons = new BindingSource();
bindingSourcePersons.DataSource = allPersons;
personComboBox.DataSource = bindingSourcePersons.DataSource;
personComboBox.ValueMember = "PersonID";
personComboBox.DisplayMember = "PersonName";
First create a class like this:
public class Person {
public string Name {get;set;}
public int Number {get;set;}
}
then you can use Linq to convert the string you read like this:
var people = data
.Split(new {'\r','\n'}, StringSplitOptions.RemoveEmptyEntries)
.Select(d => new Person { Name = d.Split(' ')[0], Value = int.Parse(d.Split(' ')[1])})
.ToList();
Or better you could read your data line by line, like this:
var people = from l in File.ReadLines(#"C:\Us...nka\example.txt")
let parts = l.Split(' ')
select new Person {
Name = parts[0].Trim(),
Value = int.Parse(parts[1].Trim())
};
here is a pseudo:
while the reader is not EndOfStream
read current line
split the line that was just read into a string[] array, the separator being a space
first item in the array would be the name and the second item in the array would be the number.
then you add the item in the combo box. The combobox has an Items collection and an add method, which just takes a System.Object.
http://msdn.microsoft.com/en-us/library/aa983551(v=vs.71).aspx
I have a ListView with two columns, Boxes and Files. I'm adding items to a list of strings, and then populating the ListView with that list of strings. I want to make it so all items that are 8 characters long go into the Boxes column and all items that are 9 characters go into the Files column. So far, I've tried to iterate through using a for loop and utilize an if else statement to add the items, but I seem to be doing something wrong. Here's my current code:
public void PopulateItemsList()
{
BoxAndFileList.Items.Clear();
ScanIdBox.Text = string.Empty;
for (int i = 0; i < BoxNumberRepository._boxAndFileList.Count; i++)
{
var item = BoxNumberRepository._boxAndFileList.Item[i];
if (item.Length == 8)
{
BoxAndFileList.Items.Insert(0, item);
}
else
{
BoxAndFileList.Items.Insert(1, item);
}
}
}
I'm iterating through my list (_boxAndFileList) and trying to utilize Insert() to insert items into the specific index of the columns (Boxes is 0, Files is 1). I can clearly see that Item is a legitimate property of a string list, yet VS keeps saying that list contains no definition of it. How can I go about doing this? And also, I haven't received outside feedback on this way of doing things yet, so if there's a better way, please let me know.
Edit: BoxNumberRepository is a class that news up a list called _boxAndFileList. Code below:
public class BoxNumberRepository : Scan_Form
{
public static List<string> _boxAndFileList = new List<string>();
public void AddItem(string item)
{
_boxAndFileList.Add(item);
}
public void Delete(string item)
{
_boxAndFileList.Remove(item);
}
public IEnumerable<string> GetAllItems()
{
return _boxAndFileList;
}
}
Thanks to Alessandro D'Andria for that suggestion. That was correct. However, all the items are still just adding to the first column, even if they're 9 characters. How can I get 9 character items to add to the second column?
The problem that you are having is that you have to add both the box and file to the list item at the same time.
EDIT: Changed cartesian product to a left outer join.
EDIT: Added comments and fixed a syntax bug
private List<string> _boxAndFileList = new List<string> { "12345678", "123456789", "1234", "123456778" };
public void PopulateItemsList()
{
//clear the list
BoxAndFileList.Items.Clear();
//add the labels to the top of the listbox
BoxAndFileList.Columns.Add("Boxes");
BoxAndFileList.Columns.Add("Files");
//set the view of the list to a details view (important if you try to display images)
BoxAndFileList.View = View.Details;
//clear scan id box
ScanIdBox.Text = string.Empty;
//get all the items whos length are 8 as well as a unique id (index)
var boxes = _boxAndFileList.Where(b => b.Length == 8).Select((b, index) => new { index, b }).ToList();
//get all the items whos length are NOT 8 as well as a unique id (index)
var files = _boxAndFileList.Where(f => f.Length != 8).Select((f, index) => new { index, f }).ToList();
//join them together on their unique ids so that you get info on both sides.
var interim = (from f in files
join b in boxes on f.index equals b.index into bf
from x in bf.DefaultIfEmpty()
select new { box = (x == null ? String.Empty : x.b), file = f.f });
//the real trick here is that you have to add
//to the listviewitem of type string[] in order to populate the second, third, or more column.
//I'm just doing this in linq, but var x = new ListViewItem(new[]{"myBox", "myFile"}) would work the same
var fileboxes = interim.Select(x => new ListViewItem(new []{ x.box, x.file})).ToArray();
//add the array to the listbox
BoxAndFileList.Items.AddRange(fileboxes);
//refresh the listbox
BoxAndFileList.Refresh();
}
Your _boxAndFileList is a List<string> so you should be declare item as string type instead var type:
string item = BoxNumberRepository._boxAndFileList.Item[i];
All your code should be like this:
public void PopulateItemsList()
{
BoxAndFileList.Items.Clear();
ScanIdBox.Text = string.Empty;
for (int i = 0; i < BoxNumberRepository._boxAndFileList.Count; i++)
{
string item = BoxNumberRepository._boxAndFileList.Item[i];
if (item.Length == 8)
{
BoxAndFileList.Items.Insert(0, item);
}
else
{
BoxAndFileList.Items.Insert(1, item);
}
}
}