I need to export Entities to a CSV File using CSVHelper. I made a trial work but I would have to write every field manually. What I want is to Write a record Prepended with either an 'H' or a 'D' and end every line with a single space. My Demo models:
PersonId FirstName LastName DateOfBirth
1 Randy Smith 1968-08-31
2 Zachary Smith 2002-01-10
3 Angie Smith 1969-11-20
4 Khelzie Smith 1996-07-27
AutoId Year Make Model OwnerId
1 2000 Toyota 4Runner 1
2 1995 Ford Mustang 1
3 2014 Chevrolet Corvette Stingray Coupe 2
4 2014 Volkswagen Beetle Coupe 4
5 1980 Ford F-150 2
6 1968 Chevrolet Camaro 3
7 2000 Tonka Truck 3
8 1993 Honda Accord 4
Into a CSV File Like this:
H 1 Randy Smith 8/31/1968
D 1 2000 Toyota 4Runner
D 2 1995 Ford Mustang
H 2 Zachary Smith 1/10/2002
D 3 2014 Chevy Corevett
D 5 1980 Ford F-150
H 3 Angie Smith 11/20/1969
D 6 1968 Chevrolet Camaro
D 7 2000 Tonka Truck
H 4 Khelzie Smith 7/27/1996
D 4 2014 Volkswagen Beetle Coupe
This is the Code I finally got to work:
StreamWriter textWriter = File.CreateText(fileName);
var csv = new CsvWriter(textWriter);
csv.Configuration.Delimiter = delimiter;
csv.Configuration.QuoteNoFields = true;
// This will skip those people who don't own a vehicle
foreach (Person person in people.Where(person => person.Vehicles.Count > 0))
{
// The letter 'H' must prefix every Header line
csv.WriteField((#"H " + person.PersonId));
csv.WriteField(person.FirstName);
csv.WriteField(person.LastName);
// Headers lines must end with a single space.
csv.WriteField((person.DateOfBirth.ToShortDateString() + " "));
csv.NextRecord();
foreach (Automobile auto in person.Vehicles)
{
// The letter 'D' must prefix every Detail line
csv.WriteField((#"D " + auto.AutoId));
csv.WriteField(auto.Year);
csv.WriteField(auto.Make);
// Details lines must end with a single space.
csv.WriteField((auto.Model + " "));
csv.NextRecord();
}
}
The real tables have ~70 fields apiece.
Just for those that have as thick a skull as mine, here is a solution:
foreach (TransactionHeader header in headers)
{
csv.WriteField("H");
csv.WriteRecord(header);
csv.WriteField(" ");
csv.NextRecord();
foreach (TransactionDetail detail in header.TransactionDetail)
{
csv.WriteField("D");
csv.WriteRecord(detail);
csv.WriteField(" ");
csv.NextRecord();
}
}
Thanks to everyone who saw this as pretty obvious and patiently waited for me to bash my head down on my desk enough times and then figure this out myself.
Related
This question already has answers here:
Reading CSV files using C#
(12 answers)
Closed last month.
I have a text file as below and I want to get only the numbers below column rank:
SKYRain LND(4) VA(x) ZZ(x) NUM(n) Rank ll ListOfNames
------- ------ ----- ----- ------ ---- -- -----------
1002 75 283680 185836 1,111.50 19268 1 Jack
4308 1100 175896 195404 751.70 6384 1 Sara
3070 252 1044788 884160 682.94 18924 1 Robert
3187 206 852280 97932 535.83 16472 1 Harry
I just want the numbers below the rank below:
19268
6384
18924
16472
Is there a way?
You have a fixed width text file. Just can simply use SubString():
public class Program{
public static void Main(){
string aLineOfYourTextFile = " 1002 75 283680 185836 1,111.50 19268 1 Jack ";
Console.WriteLine(aLineOfYourTextFile.Substring(48,5));
}
}
You can also use Split():
public class Program{
public static void Main(){
string aLineOfYourTextFile = " 1002 75 283680 185836 1,111.50 19268 1 Jack ";
var columns = aLineOfYourTextFile.Split(new[]{" "}, StringSplitOptions.RemoveEmptyEntries);
Console.WriteLine(columns[5]);
}
}
read and skip 2 lines
read next line, split on " ", select 5th entry, convert to int
repeat above till EOF
What regex for C# can I use that matches the a "string + some number + string + some number +string"
Sample Inputs:
Book a hotel room for 10 people -- o/p: 10
Book a hotel room for 15 people at 10AM -- o/p: 15
Book a hotel room for 5 employees for 12 dec at 10 am -- o/p: 5
Book a hotel room in Singapore for 10 people at today -- o/p: 10
Book a hotel room for 12 dec for 10 members -- o/p: 10
So have to fetch how many members/people/employees for booking hotel.
Hope this makes sense
A regular expression that I could plug into C# would be fantastic
I tried below pattern but not matching.
[A-Za-z]*\d+\s?(people)|(memebers)|(peoples)|(member)*$
If your number always precedes the keyword, you might not need a regex.
Try the below code.
var parts = line.Split(' ', StringSplitOptions.RemoveEmptyEntries);
var index = Array.Find(parts, p => p == "member" || p == "members" || p == "people");
int count = -1;
var found = index > 0 && int.TryParse(parts[index-1], out count);
If found is true, it indicates count has a valid value which you can use later on.
Try following :
string[] inputs = {
"Book a hotel room for 10 people -- o/p: 10",
"Book a hotel room for 15 people at 10AM -- o/p: 15",
"Book a hotel room for 5 employees for 12 dec at 10 am -- o/p: 5",
"Book a hotel room in Singapore for 10 people at today -- o/p: 10",
"Book a hotel room for 12 dec for 10 members -- o/p: 10"
};
string pattern = #"for\s+(?'count'\d+)\s+(?'type'[^\s]+)";
foreach(string input in inputs)
{
MatchCollection matches = Regex.Matches(input, pattern);
foreach (Match match in matches.Cast<Match>().AsEnumerable())
{
Console.WriteLine("Count : '{0}', Type : '{1}'", match.Groups["count"].Value, match.Groups["type"].Value);
}
}
Console.ReadLine();
if you want just the number, not capturing much else, maybe you are looking for something like this
(?<=for)(?: +)(?<number>\d+)(?= +(?:people|employee|member)s?)
Using the asterix * after the group (member)* will repeat the group 0 or more times so you could omit that.
Using the $ after member(member)$ will only match it at the end of the string.
You could use an alternation to match either people, member with an optional s or employee with an optional s
If you want to capture the digits as well for further processing you could also use a capturing group for that part.
\b[A-Za-z]*(\d+)\s?(people|members?|employees?)\b
Regex demo | C# demo
For example
string pattern = #"\b[A-Za-z]*(\d+)\s?(people|members?|employees?)\b";
string input = #"Book a hotel room for 10 people -- o/p: 10
Book a hotel room for 15 people at 10AM -- o/p: 15
Book a hotel room for 5 employees for 12 dec at 10 am -- o/p: 5
Book a hotel room in Singapore for 10 people at today -- o/p: 10
Book a hotel room for 12 dec for 10 member -- o/p: 10 ";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("Match: {0}\nGroup 1: {1}\nGroup: {2}", m.Value, m.Groups[1].Value, m.Groups[2].Value);
}
If all the matches are preceded by for you might also use
\bfor (\d+)\s?(people|members?|employees?)\b
So I have this string with 4 lines:
id score ping guid name lastmsg address qport rate
--- ----- ---- ---------- --------------- ------- --------------------- ------ -----
1 11 45 176387877 Player 1 3250 101.102.103.104:555 3647 25000
2 23 61 425716719 Player 2 3250 105.106.107.108:555 5978 25000
How can I 'extract' all of these values? Like, I want to save "id", "score", "ping", "guid", "name", etc.
I have played around with a "GetBetween" function I found here. I also tried to learn the string.Split function. But I don't think I'm getting close to what I want to archive, also I don't really understand splitting a string quite yet.
I basically need to remove all of the " " empty spaces between the values, problem is, the value length may change, e.g "name".
Can someone give me an example how I could extract the values?
Thanks in advance!
RegEx.Split is your friend, and this works well enough.
void Main()
{
// fun fact, the # in front of the string means it's literal, so you
// literally get the new lines
var input =
#"id score ping guid name lastmsg address qport rate
-- - -------------------------------------------------------------------------
1 11 45 176387877 Player 1 3250 101.102.103.104:555 3647 25000
2 23 61 425716719 Player 2 3250 105.106.107.108:555 5978 25000";
//Gets you each line
var lines = input.Split('\n');
// Skip 2 because I doubt you care about the column title
// or the row with the dashes
foreach (var line in lines.Skip(2))
{
// For each line, Regex split will return an array with each entry
// Set a breakpoint with the debugger and inspect to see what I mean.
// Splits using regex - assumes at least 2 spaces between items
// so space in 'Player 1' is handled it's a fickle solution though
// Trim the line before RegEx split to avoid extra data in the split
var r = Regex.Split(line.Trim(), #"\s{2,}");
}
}
You can do this with Regex and named groups.
Sample Input
var str = #"id score ping guid name lastmsg address qport rate
--- ----- ---- ---------- --------------- ------- --------------------- ------ -----
1 11 45 176387877 Player 1 3250 101.102.103.104:555 3647 25000
2 23 61 425716719 Player 2 3250 105.106.107.108:555 5978 25000";
Regex Definition
var regex = new Regex(#"^(?<id>[\d]+)(\s{2,})(?<score>[\d]+)(\s{2,})(?<ping>[\d]+)(\s{1,})(?<guid>[\d]+)(\s{2,})(?<name>([\w]+\s[\w]+))(\s{2,})(?<lastmsg>[\d]+)(\s{2,})(?<ip>[\d.:]+)(\s{2,})(?<port>[\d]+)(\s{2,})(?<rate>[\d]+)$",RegexOptions.Compiled);
Parsing Code
var lines = str.Split(new []{Environment.NewLine},StringSplitOptions.RemoveEmptyEntries);
foreach(var line in lines)
{
var match = regex.Match(line.Trim());
if(!match.Success) continue;
Console.WriteLine($"ID = {match.Groups["id"].Value}");
Console.WriteLine($"Score = {match.Groups["score"].Value}");
Console.WriteLine($"Ping = {match.Groups["ping"].Value}");
Console.WriteLine($"Guid = {match.Groups["guid"].Value}");
Console.WriteLine($"Name = {match.Groups["name"].Value}");
Console.WriteLine($"Last Msg = {match.Groups["lastmsg"].Value}");
Console.WriteLine($"Port = {match.Groups["port"].Value}");
Console.WriteLine($"Rate = {match.Groups["rate"].Value}");
}
Output
ID = 1
Score = 11
Ping = 45
Guid = 176387877
Name = Player 1
Last Msg = 3250
Port = 3647
Rate = 25000
ID = 2
Score = 23
Ping = 61
Guid = 425716719
Name = Player 2
Last Msg = 3250
Port = 5978
Rate = 25000
How can I rename multiple files like this:
file.txt , anotherfile.txt , log.txt
into something like this :
file1.txt , file2.txt , file3.txt
How can I do this in c# or in c++ ?
Use File.Move Method as:
IEnumerable<FileInfo> files = GetFilesToBeRenamed();
int i = 1;
foreach(FileInfo f in files)
{
File.Move(f.FullName, string.Format("file{0}.txt", i));
i++;
}
And if f is a fullpath, then you can do this instead:
File.Move(f.FullName,
Path.Combine(f.Directory.ToString(), string.Format("file{0}.txt", i));
This would work in you're using an sh-based shell:
#!/bin/sh
FEXT="txt" # This is the file extension you're searching for
FPRE="file" # This is the base of the new files names file1.txt, file2.txt, etc.
FNUM=1; # This is the initial starting number
find . -name "*.${FEXT}" | while read OFN ; do
# Determine new file name
NFN="${FPRE}${FNUM}.${FEXT}"
# Increment FNUM
FNUM=$(($FNUM + 1))
# Rename File
mv "${OFN}" "${NFN}"
done
The script in action:
[james#fractal renfiles]$ touch abc.txt
[james#fractal renfiles]$ touch test.txt
[james#fractal renfiles]$ touch "filename with spaces.txt"
[james#fractal renfiles]$ ll
total 4
-rw-rw-r-- 1 james james 0 Sep 3 17:45 abc.txt
-rw-rw-r-- 1 james james 0 Sep 3 17:45 filename with spaces.txt
-rwxrwxr-x 1 james james 422 Sep 3 17:41 renfiles.sh
-rw-rw-r-- 1 james james 0 Sep 3 17:45 test.txt
[james#fractal renfiles]$ ./renfiles.sh
[james#fractal renfiles]$ ll
total 4
-rw-rw-r-- 1 james james 0 Sep 3 17:45 file1.txt
-rw-rw-r-- 1 james james 0 Sep 3 17:45 file2.txt
-rw-rw-r-- 1 james james 0 Sep 3 17:45 file3.txt
-rwxrwxr-x 1 james james 422 Sep 3 17:41 renfiles.sh
In c++, you will eventually use
std::rename(frompath, topath);
to perform the action. TR2 proposal N1975 covers this function. However, until then, use boost::rename for the immediate future, and tr2::rename for the period after approval before final placement.
Loop through and use whatever names you want. Don't quite know if you're trying to add numbers, because the current question says 1, 2, 2.
In c# you can use File.Move(source, dest)
Of course you can do it programatically:
string[] files = new string[] {"file.txt" , "anotherfile.txt" , "log.txt"}:
int index = 0;
string Dest;
foreach (string Source in files)
{
if (!Files.Exists(Source )) continue;
do {
index++;
Dest= "file"+i+".txt";
} while (File.Exists(NewName);
File.Move(Source , Dest);
}
I have a block of text that im taking from a Gedcom (Here and Here) File
The text is flat and basically broken into "nodes"
I am splitting each node on the \r char and thus subdividing it into each of its parts( amount of "lines" can vary)
I know the 0 address will always be the ID but after that everything can be anywhere so i want to test each Cell of the array to see if it contains the correct tag for me to proccess
an example of what two nodes would look like
0 #ind23815# INDI <<<<<<<<<<<<<<<<<<< Start of node 1
1 NAME Lawrence /Hucstepe/
2 DISPLAY Lawrence Hucstepe
2 GIVN Lawrence
2 SURN Hucstepe
1 POSITION -850,-210
2 BOUNDARY_RECT (-887,-177),(-813,-257)
1 SEX M
1 BIRT
2 DATE 1521
1 DEAT Y
2 DATE 1559
1 NOTE * Born: Abt 1521, Kent, England
2 CONT * Marriage: Jane Pope 17 Aug 1546, Kent, England
2 CONT * Died: Bef 1559, Kent, England
2 CONT
1 FAMS #fam08318#
0 #ind23816# INDI <<<<<<<<<<<<<<<<<<<<<<< Start of Node 2
1 NAME Jane /Pope/
2 DISPLAY Jane Pope
2 GIVN Jane
2 SURN Pope
1 POSITION -750,-210
2 BOUNDARY_RECT (-787,-177),(-713,-257)
1 SEX F
1 BIRT
2 DATE 1525
1 DEAT Y
2 DATE 1609
1 NOTE * Born: Abt 1525, Tenterden, Kent, England
2 CONT * Marriage: Lawrence Hucstepe 17 Aug 1546, Kent, England
2 CONT * Died: 23 Oct 1609
2 CONT
1 FAMS #fam08318#
0 #ind23817# INDI <<<<<<<<<<< start of Node 3
So a when im done i have an array that looks like
address , string
0 = "1 NAME Lawrence /Hucstepe/"
1 = "2 DISPLAY Lawrence Hucstepe"
2 = "2 GIVN Lawrence"
3 = "2 SURN Hucstepe"
4 = "1 POSITION -850,-210"
5 = "2 BOUNDARY_RECT (-887,-177),(-813,-257)"
6 = "1 SEX M"
7 = "1 BIRT "
8 = "1 FAMS #fam08318#"
So my question is what is the best way to search the above array to see which Cell has the SEX tag or the NAME Tag or the FAMS Tag
this is the code i have
private int FindIndexinArray(string[] Arr, string search)
{
int Val = -1;
for (int i = 0; i < Arr.Length; i++)
{
if (Arr[i].Contains(search))
{
Val = i;
}
}
return Val;
}
But it seems inefficient because i end up calling it twice to make sure it doesnt return a -1
Like so
if (FindIndexinArray(SubNode, "1 BIRT ") != -1)
{
// add birthday to Struct
I.BirthDay = SubNode[FindIndexinArray(SubNode, "1 BIRT ") + 1].Replace("2 DATE ", "").Trim();
}
sorry this is a longer post but hopefully you guys will have some expert advice
Can use the static method FindAll of the Array class:
It will return the string itself though, if that works..
string[] test = { "Sex", "Love", "Rock and Roll", "Drugs", "Computer"};
Array.FindAll(test, item => item.Contains("Sex") || item.Contains("Drugs") || item.Contains("Computer"));
The => indicates a lamda expression. Basically a method without a concrete implementation.
You can also do this if the lamda gives you the creeps.
//Declare a method
private bool HasTag(string s)
{
return s.Contains("Sex") || s.Contains("Drugs") || s.Contains("Computer");
}
string[] test = { "Sex", "Love", "Rock and Roll", "Drugs", "Computer"};
Array.FindAll(test, HasTag);
What about a simple regular expression?
^(\d)\s=\s\"\d\s(SEX|BIRT|FAMS){1}.*$
First group captures the address, second group the tag.
Also, it might be quicker to dump all array items into a string and do your regex on the whole lot at once.
"But it seems inefficient because i end up calling it twice to make sure it doesnt return a -1"
Copy the returned value to a variable before you test to prevent multiple calls.
IndexResults = FindIndexinArray(SubNode, "1 BIRT ")
if (IndexResults != -1)
{
// add birthday to Struct
I.BirthDay = SubNode[IndexResults].Replace("2 DATE ", "").Trim();
}
The for loop in method FindIndexinArray shd break once you find a match if you are interested in only the first match.