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Treeview with csv dataset

I need an overview of two floors as a treeview. I have a csv, but don't know how to get it into the treeview. I saw many examples but nothing works. Thanks.
That's how my csv looks like:
floor;room;place;pcnumb
4;1;1;6001
4;1;2;6002
4;1;3;6003
4;1;4;6004
...
5;8;82;5082
5;8;83;5027
5;8;84;5084
5;9;85;5028
var reader = new StreamReader(File.OpenRead(#"csvh.csv"));
List<string> listA = new List<string>();
List<string> listB = new List<string>();
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(';');
listA.Add(values[0]);
listB.Add(values[1]);
foreach (var column1 in listA)
{
Console.WriteLine(column1);
}
foreach (var column2 in listA)
{
Console.WriteLine(column2);
}
}
That's what I tried, but it doesn't work with my csv

Serialize a csv to json with header record using json.net newtonsoft

I have a simple csv that I am trying to serialize to json. How do I include the header record as the name in the name value pairs?
JsonSerializer serializer = new JsonSerializer();
var csv = new List<string[]>();
var lines = System.IO.File.ReadAllLines(file);
foreach (string line in lines)
csv.Add(line.Split(','));
string json = JsonConvert.SerializeObject(csv, Formatting.Indented);

You can use a List of Dictionary<string,string> but you also need to get the header row from the csv. I have a rough idea for you below.
// initialize the list
var list = new List<Dictionary<string, string>>();
var lines = System.IO.File.ReadAllLines("");
// get your header values
var headers = lines[0].Split(',');
// Here you want to skip the first line because it is the header
foreach (string line in lines.Skip(1))
{
// split your line to get individual values
var lineSplit = line.Split(',');
// make a dictionary to hold the line values
var dictionary = new Dictionary<string, string>();
// do a for loop to apply your headers
for (int i = 0; i < headers.Length; i++)
{
dictionary.Add(headers[i], lineSplit[i]);
}
// Add your dictionary to the list
list.Add(dictionary);
}
string json = JsonConvert.SerializeObject(list, Formatting.Indented);
The above will give you an array that is not wrapped in an object. If you would like something that will wrap it into an object you can just make a simple class to take care of that. Example below.
public class CsvToJson
{
public CsvToJson()
{
this.List = new List<Dictionary<string, string>>();
}
public CsvToJson(string filePath)
{
this.List = new List<Dictionary<string, string>>();
// Adding some exception prevention
if (File.Exists(filePath))
{
ConvertFromCsvToJson(filePath);
}
}
public List<Dictionary<string, string>> List { get; set; }
private void ConvertFromCsvToJson(string filePath)
{
var lines = File.ReadAllLines(filePath);
// get your header values
var headers = lines[0].Split(',');
foreach (string line in lines.Skip(1))
{
// split your line to get individual values
var lineSplit = line.Split(',');
// make a dictionary to hold the line values
var dictionary = new Dictionary<string, string>();
// do a for loop to apply your headers
for (int i = 0; i < headers.Length; i++)
{
dictionary.Add(headers[i], lineSplit[i]);
}
// Add your dictionary to the list
List.Add(dictionary);
}
}
}
Then you could easily call on this anytime by using something like below.
var rootObject = new CsvToJson("C:\testFile.csv");
var json = JsonConvert.SerializeObject(rootObject, Formatting.Indented);

How can I extract a string out of an object that contains this string?

I created a Yaml that looks like this:
Directories:
- ./Libraries:
- DLLList.yml
- ./Output:
- None
Now I deserialized that yaml into a list of Objects:
List<object> allDirectoriesList = new List<object>();
List<string> allFileNames = new List<string>();
using (var reader = new StringReader(File.ReadAllText("./FileConfig.yml")))
{
allDirectoriesList = deserializer.Deserialize<dynamic>(reader)["Directories"] as List<Object>;
}
foreach (var directory in allDirectoriesList)
{
var directoryAsDictionary = (Dictionary<object, object>)directory;
List<object> list = directoryAsDictionary.Select(kvp => kvp.Value).ToList();
IEnumerable<string> _fileList = list.Select(i => i.ToString());
List<string> fileList = _fileList.ToList<string>();
for (int i = 0; i < fileList.Count(); i++)
{
var x = (string)list[i];
}
}
directory is an object of type Dictionary where I converted it into a List in this part:
var directoryAsDictionary = (Dictionary<object, object>)directory;
List<object> list = directoryAsDictionary.Select(kvp => kvp.Value).ToList();
This list contains 1 object of type string, where the filename is stored. But I can't get these strings out of the objects. If I cast them, or convert them ToString(), I always get "System.Collections.Generic.List`1[System.Object]", but it has to be "DLLList.yml" in this case

Assuming you are using YamlDotNet:
List<object> allDirectoriesList = new List<object>();
using (var reader = new StringReader(File.ReadAllText("./FileConfig.yml")))
{
allDirectoriesList = new DeserializerBuilder().Build().Deserialize<dynamic>(reader)["Directories"] as List<object>;
}
foreach (var directory in allDirectoriesList)
{
var directoryAsDictionary = (Dictionary<object, object>)directory;
List<object> list = directoryAsDictionary.SelectMany(kvp => (List<object>)kvp.Value).ToList();
List<string> _fileList = list.Select(Convert.ToString).ToList();
foreach(var file in _fileList)
Console.WriteLine($"Item: {file} found in {Convert.ToString(directoryAsDictionary.Keys.First())}");
}
Basically you were trying to turn the dictionary value to a string, but it was a List. By using SelectMany, it can flatten all the lists into one and use that. There were a few redundant casts, which I've also removed. For future reference, try to make your structures as simple as possible and deserialise them into structs/classes - you'll find this a lot easier that way.

C# Read text file and print out in to a table

I'm trying to read a text file and print out into a table.
I want the output to be this
But now I having different output
var column1 = new List<string>();
var column2 = new List<string>();
var column3 = new List<string>();
using (var rd = new StreamReader(#"C:\test.txt"))
{
while (!rd.EndOfStream)
{
var splits = rd.ReadLine().Split(';');
column1.Add(splits[0]);
column2.Add(splits[1]);
column3.Add(splits[2]);
}
}
Console.WriteLine("Date/Time \t Movie \t Seat");
foreach (var element in column1) Console.WriteLine(element);
foreach (var element in column2) Console.WriteLine(element);
foreach (var element in column3) Console.WriteLine(element);

You can use Linq to construct a convenient structure (e.g. List<String[]>) and then print out all the data wanted:
List<String[]> data = File
.ReadLines(#"C:\test.txt")
//.Skip(1) // <- uncomment this to skip caption if the csv has it
.Select(line => line.Split(';').Take(3).ToArray()) // 3 items only
.ToList();
// Table output (wanted one):
String report = String.Join(Environment.NewLine,
data.Select(items => String.Join("\t", items)));
Console.WriteLine(report);
// Column after column output (actual one)
Console.WriteLine(String.Join(Environment.NewLine, data.Select(item => item[0])));
Console.WriteLine(String.Join(Environment.NewLine, data.Select(item => item[1])));
Console.WriteLine(String.Join(Environment.NewLine, data.Select(item => item[2])));
EDIT: if you want to choose the movie, buy the ticket etc. elaborate the structure:
// Create a custom class where implement your logic
public class MovieRecord {
private Date m_Start;
private String m_Name;
private int m_Seats;
...
public MovieRecord(DateTime start, String name, int seats) {
...
m_Seats = seats;
...
}
...
public String ToString() {
return String.Join("\t", m_Start, m_Name, m_Seats);
}
public void Buy() {...}
...
}
And then convert to conventinal structure:
List<MovieRecord> data = File
.ReadLines(#"C:\test.txt")
//.Skip(1) // <- uncomment this to skip caption if the csv has it
.Select(line => {
String items[] = line.Split(';');
return new MovieRecord(
DateTime.ParseExact(items[0], "PutActualFormat", CultureInfo.InvariantCulture),
items[1],
int.Parse(items[2]));
}
.ToList();
And the table output will be
Console.Write(String.Join(Envrironment.NewLine, data));

Don't use Console.WriteLine if you want to add a "column". You should also use a single List<string[]> instead of multiple List<string>.
List<string[]> allLineFields = new List<string[]>();
using (var rd = new StreamReader(#"C:\test.txt"))
{
while (!rd.EndOfStream)
{
var splits = rd.ReadLine().Split(';');
allLineFields.Add(splits);
}
}
Console.WriteLine("Date/Time \t Movie \t Seat");
foreach(string[] line in allLineFields)
Console.WriteLine(String.Join("\t", line));
In general you should use a real csv parser if you want to parse a csv-file, not string methods or regex.
You could use the TextFieldParser which is the only one available in the framework directly:
var allLineFields = new List<string[]>();
using (var parser = new Microsoft.VisualBasic.FileIO.TextFieldParser(#"C:\test.txt"))
{
parser.Delimiters = new string[] { ";" };
parser.HasFieldsEnclosedInQuotes = false; // very useful
string[] lineFields;
while ((lineFields = parser.ReadFields()) != null)
{
allLineFields.Add(lineFields);
}
}
You need to add a reference to the Microsoft.VisualBasic dll to your project.
There are other available: Parsing CSV files in C#, with header

You could attempt to solve this in a more Object-Orientated manner, which might make it a bit easier for you to work with:
You can declare a simple class to represent a movie seat:
class MovieSeat
{
public readonly string Date, Name, Number;
public MovieSeat(string source)
{
string[] data = source.Split(';');
Date = data[0];
Name = data[1];
Number = data[2];
}
}
And then you can read in and print out the data in a few lines of code:
// Read in the text file and create a new MovieSeat object for each line in the file.
// Iterate over all MovieSeat objets and print them to console.
foreach(var seat in File.ReadAllLines(#"C:\test.txt").Select(x => new MovieSeat(x)))
Console.WriteLine(string.Join("\t", seat.Date, seat.Name, seat.Number));

change string into var datatype in c#

I am reading data from file like this
using (StreamReader r = new StreamReader("newfile.txt"))
{
string lines1;
lines1 = r.ReadLine();
var lines = lines1;
foreach (string line in lines)
{
var dictionary = new Dictionary<String, Int32>();
var records = line.Split(',');
How can i convert string data type to var data type?
if i used this line
var lines = lines1;
then the error accur at
var records = line.Split(',');

There is no such thing as a var datatype. "var", in C#, just means "let the compiler figure out the data type for me based on the context". in this case, using:
var lines = lines1;
or:
string lines = lines1;
Will produce the exact same code. The error message is not related to the usage of var instead of string.
The problem here is this:
lines1 = r.ReadLine();
var lines = lines1;
// ...
foreach (string line in lines)
You're reading a single line as a single string, then trying to do: "foreach string in my single string". I suspect you want something more like:
using (StreamReader r = new StreamReader("newfile.txt"))
{
while (r.Peek() >= 0)
{
string line = r.ReadLine();
var dictionary = new Dictionary<String, Int32>();
var records = line.Split(',');
// use records.... Note that above is the same as:
// string[] records = line.Split(',');
}
}

The "split" function returns an array.