I have this string in C# -
".... School||Abc\r\n...State||CA\r\n..."
The school and state are somewhere in the string. I need to parse the string in such a way that i get the values of School and State for my parameters
string school = abc (from String after parsing)
string state = CA (from string after parsing)
Try this:
string longStr = "School||Abc\r\nState||CA\r\n";
string[] keyValPairs = s.Split("\r\n".ToCharArray());
Dictionary<string, string> info = new Dictionary<string, string>();
foreach(string pair in keyValPairs)
{
string[] split = pair.Split("||");
//split[0] is the key, split[1] is the value
info.Add(split[0], split[1]);
}
Now you can access what you need like so:
string school = info["School"];
string state = info["State"];
Where the longStr variable is just your long string that you start out with, not neccessarily what I set it to.
Try split-ing string on new line chars and then it looks like a dictionary, with key values separated by ||. Another split on "||" should give you what you want.
Back of the envelope code
private static void ParseMyString(string longString) {
IEnumerable<string> shortStrings = longString.Split("\r\n".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
foreach(var ss in shortStrings) {
var kvp = ss.Split("||".ToCharArray());
Console.WriteLine("{0} - {1}", kvp[0], kvp[1]);
}
}
You can use the TextFieldParser class to parse this file, in particular if it is fixed width fields or has known delimiters.
It:
Provides methods and properties for parsing structured text files.
Though it lives in the Microsoft.VisualBasic.Text namespace, it is a .NET assembly and can be used in all .NET projects.
Assuming that your string just contains values separated by "||", "\r" or "\n".
string str = "School||Abc\r\n||State||CA\r\n||AA||AA";
str = str.Trim();
str = str.Replace("\r",string.Empty);
str = str.Replace("\n", string.Empty);
string[] keyValue = str.Split(new string[] { "||" }, StringSplitOptions.None);
Dictionary<string, string> KeyValDic = new Dictionary<string, string>();
for (int i = 0; i < keyValue.Length; i++,i++)
{
KeyValDic.Add(keyValue[i], keyValue[i + 1]);
}
Related
So I have a text file copied into memory that is delimited as follows:
"425,9856\n852,9658\n"
This is a long string with some 30,000 entries in total. What I want to do is create two arrays, one for the value to the left of the comma, one for the value to the right of the comma, and then to each array respectively i want to append the next two comma delimited strings that come after the "\n".
I have tried splitting using .Split and passing two delimiting values, but it obviously just creates one array with all values sequentially. Such as:
425
9856
852
9658
When what I want is:
array1:
452
852
array2:
9856
9658
Does that make sense?
many thanks
Since you're reading from a file, why not stream the input line-by-line, rather than reading the whole lot into memory in one go?
using var reader = new StreamReader(filePath);
while (reader.ReadLine() is not null line)
{
// Each line is of the form '425,9856', so just split on the comma
var parts = line.Split(',');
firstList.Add(parts[0]);
secondList.Add(parts[1]);
}
You can just split it twice to get what you want
public static void Main()
{
var foo = "425,9856" + Environment.NewLine + "852,9658" + Environment.NewLine;
var array1 = new List<string>();
var array2 = new List<string>();
string[] lines = foo.Split(
new string[] { Environment.NewLine },
StringSplitOptions.None);
foreach(var line in lines)
{
//Console.WriteLine("line: " + line);
var lineSplit = line.Split(',');
//Console.WriteLine("lineSplit: " + lineSplit.Length);
//lineSplit.Dump();
if(lineSplit.Length > 1)
{
array1.Add(lineSplit[0]);
array2.Add(lineSplit[1]);
}
}
Console.WriteLine("Array1: ");
array1.Dump();
Console.WriteLine("Array2: ");
array2.Dump();
}
And here's a working fiddle of it.
You can use RegEx
string row = #"425,9856\n852,9658\n";
string left = #"[^|(?<=n)]\d*(?=,)";
string right = #"(?<=,)\d*(?=\\)";
Regex rgLeft = new Regex(left);
var l = rgLeft.Matches(row).Select(p=> p.Value);
Regex rgRight = new Regex(right);
var r = rgRight.Matches(row).Select(p=> p.Value);
I have a flattened json response like this :
"data.Applicant.Age", "0"
"data.Applicant.IsInsured", "True"
i want to be able to remove data from the flattened collection using C#.
My Expected result should look like this :
"Applicant.Age","0"
"Applicant.IsInsured","True"
var input = #"""Applicant.Age"",""0""
""Applicant.IsInsured"",""True"""; // this is a string containing Environment.Newline
var lines = input.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
var newLines = new List<string>();
string output;
foreach (var line in lines)
{
var key = line.Split(',')[0].Trim();
var value = line.Split(',')[1].Trim();
key = key.Substring(6);
var newLine = string.Join(":", key, value);
newLines.Add(newLine);
Console.WriteLine(newLine);
}
This code converts your input, which is a string containing two lines, to output, which is a string containing two lines and each line does not have the data. part.
I have a chunk of text for example
string OriginalText = "Hello my name is <!name!> and I am <!age!> years old";
I'm struggling to write a function that I can enter this text into and it will return the same string except with the values surrounded by the Tags "<!" and "!>" to be replace with actual values. I have some code written but don't know how to progress any further.
if(OriginalText.Contains("<!")) //Checks if Change is necessary
{
string[] Total = OriginalText.Split(
new Char[] { '<', '!' },
StringSplitOptions.RemoveEmptyEntries);
if(Total[1].Contains("!>")) //Checks if closing tag exists
{
string ExtTag = Total[1].Split(
new Char[] { '<', '!' },
StringSplitOptions.RemoveEmptyEntries)[0];
ExtData.Add(Total[1].Split(
new Char[] { '<', '!' },
StringSplitOptions.RemoveEmptyEntries)[0]);
return Total[1];
}
}
The desired output would be
"Hello my name is James and I am 21 years old"
I am currently getting this text from a database and so this functions purpose would be to read that text and input the correct information.
Edit: Figured out how to do it so I'm going to include it below however I'm writing this in a program called mattersphere so there will reference to functions that aren't standard c#, I will put comments next to them explain what they do.
private string ConvertCodeToExtData(string OriginalText) //Accepts text with the identifying symbols as placeholders
{
string[] OriginalWords = OriginalText.Split(' '); //Creates array of individual words
string ConvertedText = string.Empty;
int Index = 0;
foreach(string OriginalWord in OriginalWords) //Go through each word in the array
{
if(OriginalWord.Substring(0,1).Equals("<") && OriginalWord.Substring(OriginalWord.Length-1 ,1).Equals(">")) //Checks if Change is necessary
{
string[] ExtDataCodeAndSymbols = OriginalWord.Substring(1, OriginalWord.Length-2).Split('.'); //Decided to create 4 different parts inbetween the <> tags it goes Symbol(e.g £, $, #) . area to look . field . symbol //separates the Code Identifier and the ExtData and Code
try
{
foreach(ExtendedData ex in this.CurrentSession.CurrentFile.ExtendedData) //Search through All data connected to the file, Extended data is essentially all the data from the database that is specific to the current user
{
if(ex.Code.ToLower() == ExtDataCodeAndSymbols[1].ToLower())
{
OriginalWords[Index] = ExtDataCodeAndSymbols[0] + ex.GetExtendedData(ExtDataCodeAndSymbols[2]).ToString() + ExtDataCodeAndSymbols[3]; //Replace code with new data
break;
}
}
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show("Extended Data Field " + ExtDataCodeAndSymbols[1] + "." + ExtDataCodeAndSymbols[2] + " Not found, please speak to your system administrator"); //Handles Error if Ext Data is not found
}
}
Index++;
}
foreach(string Word in OriginalWords)
{
ConvertedText += Word + " "; //Adds all words into a single string and adds space
}
ConvertedText.Remove(ConvertedText.Length -1, 1); //Removes Last Space
return ConvertedText;
}
The text goes in "Hello my name is <.Person.name.> and I have <£.Account.Balance.> in my bank account" and comes out "Hello my name is James and I have £100 in my bank account"
The symbols are optional but the "." are necessary as they are used to split the strings early in the function
If you have to use <!...!> placeholders, I suggest regular expressions:
using System.Text.RegularExpressions;
...
string OriginalText = "Hello my name is <!name!> and I am <!age!> years old";
Dictionary<string, string> substitutes =
new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) {
{ "name", "John" },
{ "age", "108"},
};
string result = Regex
.Replace(OriginalText,
#"<!([A-Za-z0-9]+)!>", // let placeholder contain letter and digits
match => substitutes[match.Groups[1].Value]);
Console.WriteLine(result);
Outcome:
Hello my name is John and I am 108 years old
Assuming you are stuck with that format, and assuming you know the list of fields ahead of time, you can compose a dictionary of replacement strings and, well, replace them.
//Initialize fields dictionary
var fields = new Dictionary<string, string>();
fields.Add("name", "John");
fields.Add("age", "18");
//Replace each field if it is found
string text = OriginalText;
foreach (var key in fields.Keys)
{
string searchFor = "<!" + key + "!>";
text = text.Replace(searchFor, fields[key]);
}
If the values for the replacement fields come from a domain object, you could just iterate over the properties using reflection:
class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
class Program
{
const string OriginalText = "Hello my name is <!name!> and I am <!age!> years old";
public static void Main()
{
var p = new Person();
p.Age = 18;
p.Name = "John";
//Initialize fields dictionary
var fields = new Dictionary<string, string>();
foreach (var prop in typeof(Person).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
fields.Add(prop.Name, prop.GetValue(p).ToString());
}
///etc....
And if you need the tag check to be case insensitive, you can use this instead of String.Replace():
string searchFor = #"\<\!" + key + #"\!\>";
text = Regex.Replace(text, searchFor, fields[key], RegexOptions.IgnoreCase);
I think you're looking for this:
var str = string.Format("Hello my name is {0} and I am {1} years old", name, age);
Or, since C# 6, you can just use this:
var str = $"Hello my name is {name} and I am {age} years old";
I am trying to create dynamic syntax function and function syntax is like below:
MyFunction( arg1,arg2,ar3.....);
I have string like this:
str = Previousvalue.Value1,Previousvalue.Value2
Now I would like to create syntax like this in final variable :
String final = MyFunction(Previousvalue.Value1,',',Previousvalue.Value2);
str = Previousvalue.Value1,Previousvalue.Value2,Previousvalue.Value3;
String final = MyFunction(Previousvalue.Value1,',',Previousvalue.Value2,',',Previousvalue.Value3);
This is how I am trying to achieve with string.join (without using loop) but not getting how to do it and this seems like impossible to do without using loop:
final = string.Join("MyFunction(", str.Split(','));
Case 1:
Input : string str =Previousvalue.Value1,Previousvalue.Value2
Output:
string final=MyFunction(Previousvalue.Value1,',',Previousvalue.Value2,',',Previousvalue.Value3);
Case 2 :
Input : str = Previousvalue.Value1,Previousvalue.Value2,Previousvalue.Value3;
output:
String final = MyFunction(Previousvalue.Value1,',',Previousvalue.Value2,',',Previousvalue.Value3);
Case 3:
string input = " Previousvalue.Value1";
Output:
String final = Previousvalue.Value1; //No function
From what I understand, you want to generate a string like this:
"MyFunction(Previousvalue.Value1,',',Previousvalue.Value2);"
^..........^...................^....^...................^.
prefix arg1 sep arg2 suffix
or in other words
prefix = "MyFunction(";
separator = ",',',";
suffix = ");"
which can be achieved by moving the prefix and suffix out of the string.Join and using the above separator value:
string final = "MyFunction(" + string.Join(",',',", str.Split(',')) + ");";
Also instead of Split / Join you could simply use string.Replace:
string final = "MyFunction(" + str.Replace(",", ",',',") + ");";
From my understanding of the problem you want to call the MyFunction method with n string parameters, but also with string[]. You can do it like this:
public static void Main(string[] args)
{
string str = "Test1,Test2,Test3";
string test1 = MyFunction("Test1", "Test2", "Test3");
string test2 = MyFunction(str.Split(','));
}
public static string MyFunction(params string[] parameters)
{
StringBuilder sb = new StringBuilder();
foreach(var item in parameters)
{
sb.AppendLine(item);
}
return sb.ToString();
}
Try :
public string MyJoin(params string[] vars)
{
return "MyFunction(" + string.Join(",", vars) + ");";
}
Input:
/dir1
/dir1/subdir
/dir1/subdir/sub-subdir
/dir2
Output should be:
/dir1
/dir2
How about this:
string inputDir = "/dir1/subdir/sub-subdir";
string [] Split = inputDir.Split(new Char [] {'/'}, StringSplitOptions.RemoveEmptyEntries);
string outputDir = Split[0];
List<string> result= new List<string>();
foreach (string i in input)
{
string[] tmp = i.split(#"/");
result.add(#"/" + tmp[0]);
}