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Returning a list of objects from a function to a text file C# [closed]

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I have a big function that returns a list of objects. I basically need the results to be put in to a text file. The list contains objects of a class with attributes string Index and integer count. I would want it to be written in a textfile like:
Index : Count fe.
BOOK_FROM_STORE : 27
Anybody has some guidance?

Parse the data held by your object to string and then write it to a text file.

Spliting string into array based on curly brackets [closed]

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For Example I have String like this:
""dear customer{Customer name} your reference number is {referenceNumber}"
I want to get array=["{Customer name}",{referenceNumber}]"
I have to split based on curly bracket inside bracket value is changeable means it can be different for different cases I just need to split and get array of value inside brackets including brackets.

If you think about it, splitting on { and } will produce an array where every odd index is what you want..
.Split('{','}').Where((s,i)=>i%2==1).Select(s=>'{' + s + '}').ToArray();
Split the string, use the LINQ Where function that passes the int index to the predicate, insist that the index be odd (mod2 is 1) and select a new string that puts the brackets back on, ToArray

Generate sequential number based on selected sequence [closed]

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I have a website dropdown that is populated from a SQL query. The values in the dropdown are from a table column and are like:
ABC-0123
ABC-0124
ABC-0125
ABC-0126.01
ABC-0126.02
ABC-0127
DEF-0123
DEF-0124
DEF-0125.1.01
DEF-0125.1.02
DEF-0125.2
I have a button to generate a new number based on what is selected in the dropdown. For example, if ABC-0125 is selected, ABC-0128 would need to be created since it's the next number in sequence. If ABC-0126.01 is selected, ABC-0126.03 would need to be created.
I'm looking for ideas on how to perform this. I considered just using the dropdown or querying the database directly.
I've split the selected value as a start:
String strDocFamily = drpDocFamily.SelectedValue;
string[] strDocTiers = strDocFamily.Split('.');
This may be open ended, but I'm looking for some suggestions on how to proceed. Thank you.

A solution might be to split the storage of the data into two or more columns, one for the alphabetic part ('ABC') another for the 'family' (0128 - the first set of digits) and others for the other tiers. You could then directly look up the maximum value of the 'family' column based on alphabetic. For example:
SELECT MAX(family-number)
FROM table-name
WHERE alpha-part='ABC';

Here is a UniqueID generator that can be easily adapted to generate a similar sequence to the one you need.
https://stackoverflow.com/a/39312025/2495728

How do I match a string starting at a specific position in the string? [closed]

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What is the regex for matching a date starting at the 4th position? I want it to return just the date and not the whole match. This is what I have.
^.{4}[2-9][0-9]{3}[0-1][0-9][0-9]{2}
DCSG20170406090204-FQI-046.TOT 04-FIC-046 00060Y000815050.562500G
DCS120170406090204-FQI-045.TOT 04-FIC-045 00060Y000878279.312500G
DCS120170406090204-FQI-046.TOT 04-FIC-046 00060Y000815050.562500G
http://regexr.com/3g0d5

You probably want a non-capturing group:
^(?:.{4})([2-9][0-9]{3}[0-1][0-9][0-9]{2})(?:.*)$
(mouse over the text at: http://regexr.com/3g0db and it will show just one group)

I don't know C#, but from my Perl perspective, I don't see any need for a regular expression. If you just want "the date" and don't need to validate it or separate it into components, just get the substring starting at position 4 (0 based) and 8 characters long.

Error -input string was not in a correct format [closed]

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I don't understand what is wrong i did the same code with the insert and run well
Entity obj = new Entity();
.
.
.
obj.DEPID = decimal.Parse(((TextBox)GridView1.FooterRow.FindControl("txtDEPID")).Text);
myFactory.UpdateObject(obj);

The value that is returned by the
((TextBox)GridView1.FooterRow.FindControl("txtDEPID")).Text
Is not a decimal-like string. It contains some other Special Characters like alphabets etc.
While passing the values, you need to make sure that the values being passed match the values required. Check what is the value of this.
txtDEPID.Text;
Use it in a MessageBox, to check for the value. I'm sure there is some sort of non decimal part in the string. Which is causing the trouble while converting the String to Decimal.
MessageBox.Show(txtDEPID.Text);