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How do I parse "220510" so the value comes out as 22-05-10?

When I try this code:
string value = "220510"; // The `value` variable is always in this format
string key = "30";
string title;
switch (key)
{
case "30":
title = "Date: ";
Console.WriteLine($"{title} is {value}");
break;
}
the output looks like this:
My problem is that I don't know how to insert the '-' character to separate the month, day and year because I want it to display:
Date: is 22-05-10
Please show me how to parse it.

If you have a DateTime object:
oDate.toString("yy-MM-dd");
If you have a string you can either:
sDate = sDate.Insert(2,"-");
sDate = sDate.Insert(5,"-");
or go through DateTime again (for whatever reason):
string sDate = "220510";
CultureInfo provider = CultureInfo.InvariantCulture;
DateTime sDate = Convert.ParseExact(iDate, "yyMMdd", provider);
sDate.toString("yy-MM-dd");

Your question is: How do I parse the string 220510 date format so the value comes out as 22-05-10?
In this specific case, consider using the string.Substring method to pick out the digit pairs then use string interpolation to put them back together.
const string raw = "220510";
// To do a simple parse (not using a DateTime object)
var yearString = raw.Substring(0, 2);
var monthString = raw.Substring(2, 2);
var dayString = raw.Substring(4, 2);
var string_22_05_10 = $"{yearString}-{monthString}-{dayString}";
Console.WriteLine(string_22_05_10);

How to convert a string of MM-dd-yyyy to (full month)-yyyy

I have a string variable with the value of 07/31/2016 and I need to convert this to show as July 2016. How can I do this in C#?

var input = "07/31/2016";
var date = DateTime.Parse(input);
var output = date.ToString("MMMM-yyyy");
See DateTime.Parse.
See also date and time format strings.

CultureInfo provider = CultureInfo.InvariantCulture;
var input = "07/31/2016";
var date = DateTime.ParseExact(input,"MM/dd/yyyy",provider);
var output = date.ToString("MMMM-yyyy");

This should be work:
string iDate = "07/31/2016";
DateTime oDate = Convert.ToDateTime(iDate);
Console.WriteLine(CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(oDate.Month) + " " + oDate.Year);

Parse to DateTime and call ToString() with the new format.

extract numerical values from string after dash (-)

I have string value like this Rs.100 - Rs.250 Now I want only 250 from this string.
I tried this but it's not getting output
var result = str.Substring(str.LastIndexOf('-') + 1);
UPDATE
string result = price.Text;
string[] final_result = result.Split('.');
dynamic get_result = final_result(1).ToString();
price.Text = final_result.ToString;

Try this code after getting the result of Rs.250.
var data = Regex.Match(result, #"\d+").Value;

Do it like this:
string str = "Rs.100-Rs.250";
var result = str.Substring(str.LastIndexOf('-') + 1);
String[] final_result = result.Split('.');
var get_result = final_result[1].ToString();
this will get 250 as you wanted.

try this
var result = ("Rs.100 - Rs.250").Split('-').LastOrDefault().Split('.').LastOrDefault();

Regex, Remove function in a string

I'm trying to get the function DoDialogwizardWithArguments that is inside a string using Regex:
string:
var a = 1 + 2;DoDialogWizardWithArguments('CopyGroup', '&act=enviarcliente', 96487, (Q.getBody().$.innerWidth()/4)*3, Q.getBody().$.innerHeight(), new Function("if(localStorage.getItem('atualizaPgsParaCli')){{Q.window.close();Q.window.proxy.reload();}}localStorage.removeItem('atualizaPgsParaCli');return true;"), false);p = q.getBOdy();
actual Regex (pattern):
DoDialogWizardWithArguments\((.*\$?)\)
Result expected:
DoDialogWizardWithArguments('CopyGroup', '&act=enviarcliente', 96487, (Q.getBody().$.innerWidth()/4)*3, Q.getBody().$.innerHeight(), new Function("if(localStorage.getItem('atualizaPgsParaCli')){{Q.window.close();Q.window.proxy.reload();}}localStorage.removeItem('atualizaPgsParaCli');return true;"), false)
The problem:
If there's another parentheses ")" that is not the parentheses of DoDialogWizardWithArguments function the Regex is getting this too.
How can i get only the function with his open and close parentheses.
If Regex is not possible, whats the better option?
Example regex link:https://regex101.com/r/kP2bQ4/1

Try this one as regex: https://regex101.com/r/kP2bQ4/2
DoDialogWizardWithArguments\(((?:[^()]|\((?1)\))*+)\)

I'd probably try to simplify it like this:
var str = #"var a = 1 + 2;DoDialogWizardWithArguments('CopyGroup', '&act=enviarcliente', 96487, (Q.getBody().$.innerWidth()/4)*3, Q.getBody().$.innerHeight(), new Function("if(localStorage.getItem('atualizaPgsParaCli')){{Q.window.close();Q.window.proxy.reload();}}localStorage.removeItem('atualizaPgsParaCli');return true;"), false);p = q.getBOdy();"
var lines = str.Split(';');
foreach(var line in lines)
{
if(line.Contains("DoDialogWizardWithArguments")){
int startPos = line.IndexOf("(");
int endPos = line.IndexOf(")");
return line.Substring(startPos+1, endPos - startPos - 1);
}
}
return "Not found";

If you don't want to detect if DoDialogWizardWithArguments was correctly written but just the function itself, try with "DoDialogWizardWithArguments([^,],[^,],[^,],([^,]),.+);".
Example:
String src = #"xdasadsdDoDialogWizardWithArguments('CopyGroup', '&act=enviarcliente', 96487, (Q.getBody().$.innerWidth()/4)*3, Q.getBody().$.innerHeight(), new Function(" + "\""
+ "if(localStorage.getItem('atualizaPgsParaCli')){{Q.window.close();Q.window.proxy.reload();}}localStorage.removeItem('atualizaPgsParaCli');return true;"
+ "\"" + "), false);p"; //An example of what you asked for
System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(#"DoDialogWizardWithArguments([^,]*,[^,]*,[^,]*,([^,]*),.+);"); //This is your function
MessageBox.Show(r.Match(src).Value);
if (r.IsMatch(src))
MessageBox.Show("Yeah, it's DoDialog");
else MessageBox.Show("Nope, Nope, Nope");

How to Avoid the string from number(for rupees) in c#?

am new in c# so how to replace the string
for example:-
label1.Content = "Bal.Rs." + 100;
How to get the 100 only while we save from label1.Text???

Here you go:
string OnlyNumbered = Regex.Match(label1.Content.ToString(), #"\d+").Value;

try doing this
string input="abc 123"
string result = Regex.Replace(input, #"[^\d]", "");
//output result=123
^\d specify not number
Hope this will help