Develop Reference

check if string contains dictionary keys and replace the matching subtring with Values from dictionary

I am parsing a template file which will contain certain keys that I need to map values to. Take a line from the file for example:
Field InspectionStationID 3 {"PVA TePla #WSM#", "sw#data.tool_context.TOOL_SOFTWARE_VERSION#", "#data.context.TOOL_ENTITY#"}
I need to replace the string within the # symbols with values from a dictionary.
So there can be multiple keys from the dictionary. However, not all strings inside the # are in the dictionary so for those, I will have to replace them with empty string.
I cant seem to find a way to do this. And yes I have looked at this solution:
check if string contains dictionary Key -> remove key and add value
For now what I have is this (where I read from the template file line by line and then write to a different file):
string line = string.Empty;
var dict = new Dictionary<string, string>() {
{ "data.tool_context.TOOL_SOFTWARE_VERSION", "sw0.2.002" },
{"data.context.TOOL_ENTITY", "WSM102" }
};
StringBuilder inputText = new StringBuilder();
StreamWriter writeKlarf = new StreamWriter(klarfOutputNameActual);
using (StreamReader sr = new StreamReader(WSMTemplatePath))
{
while((line = sr.ReadLine()) != null)
{
//Console.WriteLine(line);
if (line.Contains("#"))
{
}
else
{
writeKlarf.WriteLine(line)
}
}
}
writeKlarf.Close();
THe idea is that for each line, replace the string within the # and the # with match values from the dictionary if the #string# is inside the dictionary. How can I do this?
Sample Output Given the line above:
Field InspectionStationID 3 {"PVA TePla", "sw0.2.002", "WSM102"}
Here because #WSM# is not the dictionary, it is replaced with empty string
One more thing, this logic only applies to the first qurter of the file. The rest of the file will have other data that will need to be entered via another logic so I am not sure if it makes sense to read the whole file in into memory just for the header section?

Here's a quick example that I wrote for you, hopefully this is what you're asking for.
This will let you have a <string, string> Dictionary, check for the Key inside of a delimiter, and if the text inside of the delimiter matches the Dictionary key, it will replace the text. It won't edit any of the inputted strings that don't have any matches.
If you want to delete the unmatched value instead of leaving it alone, replace the kvp.Value in the line.Replace() with String.Empty
var dict = new Dictionary<string, string>() {
{ "test", "cool test" }
};
string line = "#test# is now replaced.";
foreach (var kvp in dict)
{
string split = line.Split('#')[1];
if (split == kvp.Key)
{
line = line.Replace($"#{split}#", kvp.Value);
}
Console.WriteLine(line);
}
Console.ReadLine();

If you had a list of tuple that were the find and replace, you can read the file, replace each, and then rewrite the file
var frs = new List<(string F, string R)>(){
("#data.tool_context.TOOL_SOFTWARE_VERSION#", "sw0.2.002"),
("#otherfield#", "replacement here")
};
var i = File.ReadAllText("path");
frs.ForEach(fr => i = i.Replace(fr.F,fr.R));
File.WriteAllText("path2", i);
The choice to use a list vs dictionary is fairly arbitrary; List has a ForEach method but it could just as easily be a foreach loop on a dictionary. I included the ## in the find string because I got the impression the output is not supposed to contain ##..
This version leaves alone any template parameters that aren't available

You can try matching #...# keys with a help of regular expressions:
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
...
static string MyReplace(string value, IDictionary<string, string> subs) => Regex
.Replace(value, "#[^#]*#", match => subs.TryGetValue(
match.Value.Substring(1, match.Value.Length - 2), out var item) ? item : "");
then you can apply it to the file: we read file's lines, process them with a help of Linq and write them into another file.
var dict = new Dictionary<string, string>() {
{"data.tool_context.TOOL_SOFTWARE_VERSION", "sw0.2.002" },
{"data.context.TOOL_ENTITY", "WSM102" },
};
File.WriteAllLines(klarfOutputNameActual, File
.ReadLines(WSMTemplatePath)
.Select(line => MyReplace(line, dict)));
Edit: If you want to switch off MyReplace from some line on
bool doReplace = true;
File.WriteAllLines(klarfOutputNameActual, File
.ReadLines(WSMTemplatePath)
.Select(line => {
//TODO: having line check if we want to keep replacing
if (!doReplace || SomeCondition(line)) {
doReplace = false;
return line;
}
return MyReplace(line, dict)
}));
Here SomeCondition(line) returns true whenever header ends and we should not replace #..# any more.

How do i create a c# dictionary that will read in key and values from .csv file

I have a .csv file with a list of abbreviations and their actual meaning e.g.
Laughing Out Loud, LOL
I need to be able to search for an abbreviation in a text box and replace the abbreviation with the actual words. This is what I have attempted so far to understand dictionaries but cannot work out how to read in values from the file.
Dictionary<string, string> Abbreviations = new Dictionary<string, string>();
Abbreviations.Add("Laughing Out Loud", "lol");
foreach (KeyValuePair<string, string> abbrev in Abbreviations)
{
txtinput.Text = txtinput + "<<" + abbrev.Key + ">>";
}

You can try this LINQ solution the GroupBy is to handle the case where a key is in a file multiple times.
Dictionary<string, string[]> result =
File.ReadLines("test.csv")
.Select(line => line.Split(','))
.GroupBy(arr => arr[0])
.ToDictionary(gr => gr.Key,
gr => gr.Select(s => s[1]).ToArray());
To check if the abbreviation in the TextBox exists in the Dictionary:
foreach (KeyValuePair<string, string[]> abbrev in result)
{
if (txtinput.Text == abbrev.Value)
{
txtinput.Text = txtinput + "<<" + abbrev.Key + ">>";
}
}

You can start by creating a Stream Reader for your file, then looping for all your values in the CSV and add them to the dictionary.
static void Main(string[] args)
{
var csv_reader = new StreamReader(File.OpenRead(#"your_file_path"));
//declare your dictionary somewhere outside the loop.
while (!csv_reader.EndOfStream)
{
//read the line and split if you need to with .split('')
var line = reader.ReadLine();
//Add to the dictionary here
}
//Call another method for your search and replace.
SearchAndReplace(your_input)
}
Then have the implementation of that method, search if the input exists in the dictionary and if it does replace it.
You could use LINQ to put the values of the csv into your dictionary, if that's easier for you.

I'm going to assume that your input file may have commas in the actual text, and not just separating the two fields.
Now, if that were the case, then the standard CSV file format for format the file like this:
Laughing Out Loud,LOL
"I Came, I Saw, I Conquered",ICISIC
However, from your example you have a space before the "LOL", so it doesn't appear that you're using standard CSV.
So I'll work on this input:
Laughing Out Loud, LOL
"I Came, I Saw, I Conquered",ICISIC
"to, too, or two", 2
because,B/C
For this input then this code produces a dictionary:
var dictionary =
(
from line in File.ReadAllLines("FILE.CSV")
let lastComma = line.LastIndexOf(',')
let abbreviation = line.Substring(lastComma + 1).Trim()
let actualRaw = line.Substring(0, lastComma).Trim()
let actual = actualRaw.StartsWith("\"") && actualRaw.EndsWith("\"")
? actualRaw.Substring(1, actualRaw.Length - 2)
: actualRaw
select new { abbreviation, actual }
).ToDictionary(x => x.abbreviation, x => x.actual);
You can go one better than this though. It's quite possible to create a "super function" that will do all of the replaces in one go for you.
Try this:
var translate =
(
from line in File.ReadAllLines("FILE.CSV")
let lastComma = line.LastIndexOf(',')
let abbreviation = line.Substring(lastComma + 1).Trim()
let actualRaw = line.Substring(0, lastComma).Trim()
let actual = actualRaw.StartsWith("\"") && actualRaw.EndsWith("\"")
? actualRaw.Substring(1, actualRaw.Length - 2)
: actualRaw
select (Func<string, string>)(x => x.Replace(abbreviation, actual))
).Aggregate((f1, f2) => x => f2(f1(x)));
Then I can do this:
Console.WriteLine(translate("It was me 2 B/C ICISIC, LOL!"));
I get this result:
It was me to, too, or two because I Came, I Saw, I Conquered, Laughing Out Loud!

Extract parts of string

My string is like
COMMAND="HELP ME" TIMEOUT_SECONDS="30" APP_ID="SOMETHING RANDOM" COUNT="100" RETVAL="0" STDOUT="DATA I NEED" STDERR="NO ERROR" STATUS="SUCCESS"
I want to be able to extract STDOUT, STDERR and STATUS. How can I do it ?

You can try this regex:
(?<=(?:STDOUT|STDERR|STATUS)\=")([^"]+)
As a result you will get 3 results.
MatchCollection mcol = Regex.Matches(strInput, #“(?<=(?:STDOUT|STDERR|STATUS)\=")([^"]+)”);
foreach(Match m in mcol)
{
System.Diagnostic.Debug.Print(m.ToString());
}
Also:
using System.Text.RegularExpressions;
Live Demo
Here, in this part of regex:
(?:STDOUT|STDERR|STATUS)
You can also specify the key (other than the 3 mentioned) whose value is needed.

string input2 = #"COMMAND=""HELP ME"" TIMEOUT_SECONDS=""30"" APP_ID=""SOMETHING RANDOM"" COUNT=""100"" RETVAL=""0"" STDOUT=""DATA I NEED"" STDERR=""NO ERROR"" STATUS=""SUCCESS""";
var dict = Regex.Matches(input2, #"(.+?)=""(.+?)""").Cast<Match>()
.ToDictionary(m => m.Groups[1].Value.Trim(),
m => m.Groups[2].Value.Trim());
Console.WriteLine(dict["STDOUT"]);
Console.WriteLine(dict["STATUS"]);

Use the following function:
public static Dictionary<string,string> GetValues(string command)
{
Dictionary<string,string> output = new Dictionary<string,string>();
string[] splitCommand = command.Split(" ");
foreach(var item in splitCommand)
{
output.Add(item.Split("=")[0] , item.Split("=")[1]);
}
return output;
}
When you want to get the values use the function like
Dictionary<string,string> output = YourClass.GetValue(command);
string stdout = output["STDOUT"];
string etderr= output["ETDERR"];
string status = output["STATUS"];
I donot have access to compiler. So, there might be an error. But the overall functionality will look something like this.

extract variables and values from http post / string c#

I am trying to read in POST data to an ASPX (c#) page. I have got the post data now inside a string. I am now wondering if this is the best way to use it. Using the code here (http://stackoverflow.com/questions/10386534/using-request-getbufferlessinputstream-correctly-for-post-data-c-sharp) I have the following string
<callback variable1="foo1" variable2="foo2" variable3="foo3" />
As this is now in a string, I am splitting based on a space.
string[] pairs = theResponse.Split(' ');
Dictionary<string, string> results = new Dictionary<string, string>();
foreach (string pair in pairs)
{
string[] paramvalue = pair.Split('=');
results.Add(paramvalue[0], paramvalue[1]);
Debug.WriteLine(paramvalue[0].ToString());
}
The trouble comes when a value has a space in it. For example, variable3="foo 3" upsets the code.
Is there something better I should be doing to parse the incoming http post variables within the string??

You might want to treat it as XML directly:
// just use 'theResponse' here instead
var xml = "<callback variable1=\"foo1\" variable2=\"foo2\" variable3=\"foo3\" />";
// once inside an XElement you can get all the values
var ele = XElement.Parse(xml);
// an example of getting the attributes out
var values = ele.Attributes().Select(att => new { Name = att.Name, Value = att.Value });
// or print them
foreach (var attr in ele.Attributes())
{
Console.WriteLine("{0} - {1}", attr.Name, attr.Value);
}
Of course you can change that last line to whatever you want, the above is a rough example.

Simple way to read and write name value text file

I have some class with lots of fields;
public class CrowdedHouse
{
public int value1;
public float value2;
public Guid value3;
public string Value4;
// some more fields below
}
My classmust be (de)serialized into simple Windows text file in the following format
NAME1=VALUE1
NAME2=VALUE2
What is the most convinient way to do that in .NET? This is a text file and all the values must be fist converted to string. Let's assume I have already converted all data to strings.
UPDATE One option would be pinvoke WritePrivateProfileString/WritePrivateProfileString
but these are using the required "[Section]" field that I don't need to use.

EDIT: If you have already converted each data value to strings, simply use the method below to serialize it after making a Dictionary of these values:
var dict = new Dictionary<string, string>
{
{ "value1", "value1value" },
{ "value2", "value2value" },
// etc
}
or use dict.Add(string key, string value).
To read the data, simply split each line around the = and store the results as a Dictionary<string, string>:
string[] lines = File.ReadAllLines("file.ext");
var dict = lines.Select(l => l.Split('=')).ToDictionary(a => a[0], a => a[1]);
To convert a dictionary to the file, use:
string[] lines = dict.Select(kvp => kvp.Key + "=" + kvp.Value).ToArray();
File.WriteAllLines(lines);
Note that your NAMEs and VALUEs cannot contain =.

Writing is easy:
// untested
using (var file = System.IO.File.CreateText("data.txt"))
{
foreach(var item in data)
file.WriteLine("{0}={1}", item.Key, item.Value);
}
And for reading it back:
// untested
using (var file = System.IO.File.OpenText("data.txt"))
{
string line;
while ((file.ReadLine()) != null)
{
string[] parts = line.Split('=');
string key = parts[0];
string value = parts[1];
// use it
}
}
But probably the best answer is : Use XML.

Minor improvement of Captain Comic answer:
To enable = in values: (will split only once)
var dict = lines.Select(l => l.Split(new[]{'='},2)).ToDictionary(a => a[0], a => a[1]);