My problem is that I have a list that contains a few strings and inside this list another list of decimals, something like this:
public class excelInventario
{
public excelInventario() { cols = new List<decimal>); }
public string codigo { get; set; }
public string nombre { get; set;} .
public List<decimal> cols { get; set; } //Lista de columnas
public decimal suma { get; set; }
public decimal stock { get; set; }
public decimal diferencia { get; set; }
public decimal precio { get; set; }
}
and now I need to put this in Excel. The problem is that when I use the method LoadFromCollection(MyList) the strings appear well in Excel, but the list of decimals is not put correctly, but:
System.Collections.Generic.List`1[System.Decimal].
Can I adapt this method or do I need to use a loop and put "manually" the row values one by one?
I suspect this second option it will be inefficient.
---------------EDIT TO ADD MORE CODE--------------
int tamcolumnas=excelin[0].cols.Count;
using (ExcelPackage package = new ExcelPackage(file))
{
ExcelWorksheet hoja = package.Workbook.Worksheets.Add("Comparativo unidades contadas VS stock");
hoja.Cells["A1"].Value = "CODART";
hoja.Cells["B1"].Value = "NOMBRE";
for(int i=0;i<tamcolumnas;i++)
{ hoja.Cells[1, i+3].Value = "COL"+(i+1); }
var MyList = new List<excelInventario>();
hoja.Cells.LoadFromCollection(MyList,true);
hoja.Cells[2, 3].LoadFromArrays(MyList.Select((r) => r.cols.Cast<object>).ToArray()));
in this last line is where fails.
Say:
System.ArgumentOutOfRangeException
The specified argument is outside the range of valid values.
Since those are Lists the closest you can get to automation is the LoadFromArray since those are not true objects. Its not exactly pretty since it requires casting so check for performance hits. Otherwise, it may be best to use plain old loops. Here is what I mean:
[TestMethod]
public void ListOfList_Test()
{
//http://stackoverflow.com/questions/33825995/how-to-use-loadfromcollection-in-epplus-with-a-list-containing-another-list-insi
//Throw in some data
var MyList = new List<TestExtensions.excelInventario>();
for (var i = 0; i < 10; i++)
{
var row = new TestExtensions.excelInventario
{
codigo = Path.GetRandomFileName(),
nombre = i.ToString(),
cols = new List<decimal> {i, (decimal) (i*1.5), (decimal) (i*2.5)}
};
MyList.Add(row);
}
//Create a test file
var fi = new FileInfo(#"c:\temp\ListOfList.xlsx");
if (fi.Exists)
fi.Delete();
int tamcolumnas = 10; // excelin[0].cols.Count;
using (ExcelPackage package = new ExcelPackage(fi))
{
ExcelWorksheet hoja = package.Workbook.Worksheets.Add("Comparativo unidades contadas VS stock");
hoja.Cells["A1"].Value = "CODART";
hoja.Cells["B1"].Value = "NOMBRE";
for (int i = 0; i < tamcolumnas; i++)
{
hoja.Cells[1, i + 3].Value = "COL" + (i + 1);
}
//var MyList = new List<TestExtensions.excelInventario>();
hoja.Cells.LoadFromCollection(MyList, true);
//hoja.Cells[2, 3].LoadFromArrays(MyList.Select((r) => r.cols.Cast<object>).ToArray()));
hoja.Cells[2, 3].LoadFromArrays(MyList.Select((r) => r.cols.Cast<object>().ToArray()));
package.Save();
}
}
Related
The button 1-10 are the items;
the pos screenshot
codes i used but doesn't work maybe it's wrong but i can't find answers on the internet
private void enterPayment_Click(object sender, EventArgs e)
{
label1.Text = "Payment";
//price.ReadOnly = false;
//price.Text = "0.00";
//price.Focus();
//Kukunin ko yung total ng List Items
double total = 0;
int ilan = orders.Items.Count;
for (int i = 0; i >= ilan; i++)
{
string item = orders.Items[i].ToString();
int Index = item.IndexOf("#");
int Length = item.Length;
string presyoString = item.Substring(Index + 1, Length - Index - 1);
double presyoDouble = double.Parse(presyoString);
total += presyoDouble;
//price.Text = (total + ".00");
}
price.Text = (total + ".00");
}
I strongly recommend that you use the listbox as a view only, not to be use to perform the mathematical operation. The data can be use in collection such as List so that you can perform better operation.
For example, at program load, I will add product information on List<T> and on form, I place a tag in the button consider it as product Id. So, when I click on the button, it will pass the tag property and from there, I will search the product information on list regarding my Id and add into another final List<T> and get the sum of it.
public partial class Form1 : Form
{
private List<ProductDisplay> listProductDisplay = new List<ProductDisplay>();
private List<ProductInformation> listProductInfo = new List<ProductInformation>();
public Form1()
{
InitializeComponent();
LoadProduct();
}
private void LoadProduct()
{
listProductDisplay = new List<ProductDisplay>()
{
new ProductDisplay{ProdID = 1,ProdName = "Chargrilled Burger",ProdPrice = 330.00m},
new ProductDisplay{ProdID = 2,ProdName = "Mushroom N' Swish",ProdPrice = 330.00m},
new ProductDisplay{ProdID = 3,ProdName = "Chicken Burger",ProdPrice = 250.00m},
new ProductDisplay{ProdID = 4,ProdName = "Steak Loader",ProdPrice = 220.00m},
new ProductDisplay{ProdID = 5,ProdName = "Cookie Sandwich",ProdPrice = 125.00m},
new ProductDisplay{ProdID = 6,ProdName = "Cookie Sundae",ProdPrice = 175.00m},
new ProductDisplay{ProdID = 7,ProdName = "Chicken Nuggets",ProdPrice = 145.00m},
new ProductDisplay{ProdID = 8,ProdName = "Curly Fries",ProdPrice = 75.00m},
new ProductDisplay{ProdID = 9,ProdName = "Sprite",ProdPrice = 50.00m},
new ProductDisplay{ProdID = 10,ProdName = "Coke",ProdPrice = 50.00m}
};
}
private void InsertOrder_ButtonClick(object sender, EventArgs e)
{
try
{
Button btn = (Button)sender;
int number = Convert.ToInt32(btn.Tag);
var itemProduct = listProductDisplay.First(x => x.ProdID == number);
ProductInformation prod = new ProductInformation
{
ProdID = itemProduct.ProdID,
ProdName = itemProduct.ProdName,
ProdPrice = itemProduct.ProdPrice,
ProdQty = 1
};
prod.ProdDisplayName = $"{prod.ProdQty}x {prod.ProdName} #{prod.ProdPrice.ToString("F")} = {(prod.ProdPrice * prod.ProdQty).ToString("F")}";
listProductInfo.Add(prod);
listBoxItem.DataSource = null;
listBoxItem.DataSource = listProductInfo;
listBoxItem.DisplayMember = "ProdDisplayName";
listBoxItem.ValueMember = "ProdID";
var price = listProductInfo.Sum(t => (t.ProdPrice * t.ProdQty));
txtPayment.Text = price.ToString("F");
}
catch (Exception ex)
{
MessageBox.Show("Failed to insert order");
throw;
}
}
}
public class ProductDisplay
{
public int ProdID { get; set; }
public string ProdName { get; set; }
public decimal ProdPrice { get; set; }
}
public class ProductInformation
{
public int ProdID { get; set; }
public string ProdName { get; set; }
public string ProdDisplayName { get; set; }
public decimal ProdPrice { get; set; }
public int ProdQty { get; set; }
}
Parsing and extracting values from a string like that is very error prone and brittle. What happens if the order of fields in your line changes? Or if you add currency symbols?
#Luiey's solution is the smartest way to go ahead. But if for some reason you cannot make so many changes to your code, the bare minimum you want to do is store the items in a list as a custom object with statically typed fields for price, quantity and total. The ListBox class invokes a ToString() at the time of rendering items. So you can easily override this method to prepare the output string according to your needs.
private class LineItem
{
public LineItem()
{
Quantity = 0;
Description = string.Empty;
Price = 0;
}
public int Quantity
{
get;
set;
}
public string Description
{
get;
set;
}
public int Price
{
get;
set;
}
public int Total
{
get
{
return Quantity * Price;
}
}
public override string ToString()
{
return $"{Quantity} × {Description} # {Price} = {Total}";
}
}
Then you add an item to your ListBox like this.
var item = new LineItem()
{
Quantity = 1,
Description = "Foo bar",
Price = 10
};
listBox1.Items.Add(item);
And add them up like this.
var items = listBox1.Items.Cast<LineItem>().ToArray();
var accumulator = 0;
accumulator = items.Aggregate(accumulator, (a, i) => a + (i.Quantity * i.Price), (a) => a);
I have my variables class with constructor
public class Gdf2Lines
{
public string line { get; set; }
public int linenumber { get; set; }
public string columnNumber { get; set; }
public string columnName { get; set; }
public Gdf2Lines()
{
line = "";
linenumber = -1;
columnNumber = ""; // prefer to keep as the string read from the text source
columnName = "";
}
}
I have my class that creates of list of the above class and populates the variables within for each line from a file
class GDF2
{
Gdf2Lines Data = new Gdf2Lines();
List<Gdf2Lines> gdf2 = new List<Gdf2Lines>();
public GDF2(string[] arrFile)
{
int count = 0;
foreach (String line in arrFile)
{
Data.line = line;
Data.linenumber = count;
Data.columnNumber = GetColumnNumber(line);
Data.columnName = GetColumnName(line);
count++;
gdf2.Add(Data);
}
}
}
I know a "normal" list can be joined into a string by:
String.Join(Environment.Newline.ToString(), List);
But is there an equally easy way to join one of the (sub) variables within my list, such as
String.Join(",", gdf2.columnName);
Currently I am using a for loop.
Something like this should work:
String.Join(",", gdf2.Select(x => x.columnName));
This uses LINQ to extract a list of columnName values from the list of Gdf2Line.
I am really new to c# but I really want to start using linq to extract simple information from excel spreadsheets.
I feel quite embarrassed to ask this, but I can't seem to find a solution. Basically, all I want is find the average of the amount of donations within a CSV file.
This is following code so far:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace CSharpTest
{
class Program
{
public string Donor { get; set; }
public DateTime Date { get; set; }
public decimal Amount { get; set; }
public string Charity { get; set; }
static void Main(string[] args)
{
{
var file = "C:\\Users\\user\\Desktop\\Donations.csv".AsFile();
File.ReadAllLines(file).Select(x => x.Split('\n')).Average(x => x.Count());
}
}
}
The thing is I know this is wrong as I only want the values in Amount. For something like this I am sure I should be using GroupBy(), however I can't seem to extract the public class Amount. I would be ever so grateful if someone could point me in the right direction please. Many thanks.
Creating an object model to hold the data is a good start
public class Donation {
public string Donor { get; set; }
public DateTime Date { get; set; }
public decimal Amount { get; set; }
public string Charity { get; set; }
}
Next you want to parse the data from the CSV file.
Something like CSVHelper would help in parsing the data into usable objects.
var textReader = new StreamReader("C:\\Users\\user\\Desktop\\Donations.csv");
var csv = new CsvReader( textReader );
var records = csv.GetRecords<Donation>();
From there calculating the average using LINQ is a simple matter of calling the extension method on the parsed collection.
var average = records.Average(_ => _.Amount);
If external Lib like CSVHelper from Nkosi's answer is not possible you can keep the same principle but parse it by hand like:
public class Model
{
public int Id { get; set; }
public string Donor { get; set; }
public DateTime Date { get; set; }
public decimal Amount { get; set; }
public string Charity { get; set; }
}
string csv = File.ReadAllText(file);
//skip(1), for hearder
var lines = csv.Split(new char[] {'\n'}, StringSplitOptions.RemoveEmptyEntries).Skip(1);
List<Model> models = new List<Model>();
int id=1;
foreach (var item in lines)
{
var values = item.Split(',');
if(values.Count()!= 4) continue;//error loging
var model = new Model
{
Id = id,
Donor = values[0],
Date = DateTime.Parse(values[1]),
Amount = Decimal.Parse(values[2]),
Charity = values[3]
};
models.Add(model);
id++;
}
And now you can linq easly:
var result = models.Average(x=> x.Amount);
And for Average per person
var avgPerPerson = models
.GroupBy(x=> x.Donor)
.Select(g=> new {
Donor = g.Key,
Average = g.Average(c => c.Amount)
});
var total = 0.0d;
foreach (var line in File.ReadLines(//FilePath))
{
var lineArr = line.Split(',');
double lineDonation;
if (double.TryParse(lineArr[2])
total += lineDonation;
}
You can Microsoft Excel package "Microsoft.Office.Interop.Excel". you can easily download it from Nuget:
static void Main(string[] args)
{
Microsoft.Office.Interop.Excel.Application xlsApp = new Microsoft.Office.Interop.Excel.Application();
if (xlsApp == null)
{
//Any message
}
Workbook wb = xlsApp.Workbooks.Open("C:\\Users\\310231566\\Downloads\\main.xlsx",
0, true, 5, "", "", true, XlPlatform.xlWindows, "\t", false, false, 0, true);
Sheets sheets = wb.Worksheets;
Worksheet ws = (Worksheet)sheets.get_Item(1);
Range firstColumn = ws.UsedRange.Columns[1];
System.Array myvalues = (System.Array)firstColumn.Cells.Value;
string[] strArray = myvalues.OfType<object>().Select(o => o.ToString()).ToArray();
int j = 0;
int avg = 0;
int[] intArray = new int[strArray.Length-1];
for (int i = 1; i < strArray.Length; i++)
{
intArray[j] = int.Parse(strArray[i]);
avg = avg + intArray[j];
j++;
}
avg = avg/intArray.Length;
}
Average amount per donor onliner, with no failsafe :
var avg = File
.ReadAllLines(file)
.Skip(1)
.Select(x => x.Split(','))
.Select((x,i) => new {
Donor = values[0],
Amount = Decimal.Parse(values[2])
})
.GroupBy(x=> x.Donor)
.Select(g=> new {
Donor = g.Key,
AverageAmount = g.Average(c => c.Amount)
});
I have a program that is working except that my data is contained in an array; however, I have found out from you people that I cannot load a dataGridView from an array.
If I had code like this, how would I load a List for the source of the dataGridView1...
// Load some date to indicate what I'm trying to do.
int nColName = 0;
int nColNumberOfOccurances = 1;
int nColTotalTime = 2;
int nColAverageTime = 3;
string[,] strMyArray = new string[2,4];
// load array with test data
for (int i = 0; i < strMyArray.Length; i++)
{
switch (i)
{
case 0:
strMyArray.SetValue("file1.log".ToString(), i, nColName);
strMyArray.SetValue("10".ToString(), i, nColNumberOfOccurances);
strMyArray.SetValue("8989".ToString(), i, nColTotalTime);
strMyArray.SetValue("898.9".ToString(), i, nColAverageTime);
break;
case 1:
strMyArray.SetValue("file2.log".ToString(), i, nColName);
strMyArray.SetValue("5".ToString(), i, nColNumberOfOccurances);
strMyArray.SetValue("4494.5".ToString(), i, nColTotalTime);
strMyArray.SetValue("898.9".ToString(), i, nColAverageTime);
break;
}
}
// convert an array like the above into a List so that I can say...
// myNewListFromArray = strMyArray
// dataGridView1.DataSource = myNewListFromArray;
Arrays works with DataGridView. Your problems is - you using two dimensional array which cannot be used as DataSource.
Instead of array, create a class with properties which represent your data.
Note: important to use a property, because DataGridView binding works with properties only.
public class MyData
{
public string Name { get; set; }
public string NumberOfOccurances { get; set; }
public string TotalTime { get; set; }
public string AverageTime { get; set; }
}
Then use this class in the List
var list = new List<MyData>
{
new MyData
{
Name = "file1.log",
NumberOfOccurances = "10",
TotalTime = "8989",
AverageTime = "898.9"
},
new MyData
{
Name = "file2.log",
NumberOfOccurances = "5",
TotalTime = "4494.5",
AverageTime = "898.9"
},
}
dataGridView1.DataSource = list;
I'm working on a homework problem for my computer science class. A cities census data is on a text file holding records for its citizens. Each line will have four fields(age, gender, marital status, and district) of different data types separated by a comma. For example, 22, F, M, 1.
How should I approach this? My thoughts are that I should use two 1D arrays, one for age and one for district. I need to be able to later count how many people are in each district, and how many people are in different age groups for the whole city.
How do I read each line and get the info I want into each array?
edit**
This is what I've managed to do so far. I'm trying to separate my data from fields into four different arrays. This is where I'm stuck.
FileStream fStream = new FileStream("test.txt", FileMode.Open, FileAccess.Read);
StreamReader inFile = new StreamReader(fStream);
string inputRecord = "";
string[] fields;
int[] ageData = new int[1000];
string[] genderData = new string[1000];
string[] maritalData = new string[1000];
int[] districtData = new int[1000];
inputRecord = inFile.ReadLine();
while (inputRecord != null)
{
fields = inputRecord.Split(',');
int i = 0;
ageData[i] = int.Parse(fields[0]);
genderData[i] = fields[1];
maritalData[i] = fields[2];
districtData[i] = int.Parse(fields[3]);
i++;
inputRecord = inFile.ReadLine();
}
edit 2**
First question, I've decided to use the below code to find out how many citizens are in each district of the census data.
for (int x = 1; x <= 22; x++)
for (int y = 0; y < districtData.Length; y++)
if (districtData[y] == x)
countDist[x]++;
for (int x = 1; x <= 22; x++)
Console.WriteLine("District " + x + " has " + countDist[x] + " citizens");
In my .Writeline when x reaches two digits it throws off my columns. How could I line up my columns better?
Second question, I am not quite sure how to go about separating the values I have in ageData into age groups using an if statement.
It sounds like each of the four fields have something in common... they represent a person surveyed by the census. That's a good time to use a class along the lines of
public class Person
{
public int Age { get; set; }
public string Gender { get; set; }
public string MaritalStatus { get; set; }
public int District { get; set; }
}
Then, just read in all of the lines from the text file (if it's small, it's fine to use File.ReadAllLines()), and then create an instance of Person for each line in the file.
You can create a
List<Person> people;
to hold the Person instances that you parse from the text file.
Since the lines appear to be separated by commas, have a look at String.Split().
UPDATE
The attempt in your edit is pretty close. You keep creating a new i and initializing it to 0. Instead, initialize it outside your loop:
int i = 0;
while (inputRecord != null)
{
fields = inputRecord.Split(',');
Also you may want to trim excess spaces of of your input. If the fields are separated with ", " rather than just "," you will have excess spaces in your fields.
genderData[i] = fields[1].Trim();
maritalData[i] = fields[2].Trim();
How about this?
List<string[]> o = File.ReadAllLines(#"C:\TestCases\test.txt").Select(x => x.Split(',')).OrderBy(y => y[0]).ToList();
Each person is a string array in the list.
Each property is a index in the array eg: age is first.
The above code reads all lines comma delimits them orders them by age and adds them to the list.
public static class PersonsManager
{
public static PersonStatistics LoadFromFile(string filePath)
{
var statistics = new PersonStatistics();
using (var reader = new StreamReader(filePath))
{
var separators = new[] { ',' };
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
if (string.IsNullOrWhiteSpace(line))
continue; //--malformed line
var lParts = line.Split(separators, StringSplitOptions.RemoveEmptyEntries);
if (lParts.Length != 4)
continue; //--malformed line
var person = new Person
{
Age = int.Parse(lParts[0].Trim()),
Gender = lParts[1].Trim(),
MaritalStatus = lParts[2].Trim(),
District = int.Parse(lParts[3].Trim())
};
statistics.Persons.Add(person);
}
}
return statistics;
}
}
public class PersonStatistics
{
public List<Person> Persons { get; private set; }
public PersonStatistics()
{
Persons = new List<Person>();
}
public IEnumerable<Person> GetAllByGender(string gender)
{
return GetByPredicate(p => string.Equals(p.Gender, gender, StringComparison.InvariantCultureIgnoreCase));
}
//--NOTE: add defined queries as many as you need
public IEnumerable<Person> GetByPredicate(Predicate<Person> predicate)
{
return Persons.Where(p => predicate(p)).ToArray();
}
}
public class Person
{
public int Age { get; set; }
public string Gender { get; set; }
public string MaritalStatus { get; set; }
public int District { get; set; }
}
Usage:
var statistics = PersonsManager.LoadFromFile(#"d:\persons.txt");
var females = statistics.GetAllByGender("F");
foreach (var p in females)
{
Console.WriteLine("{0} {1} {2} {3}", p.Age, p.Gender, p.MaritalStatus, p.District);
}
I hope it helps.