Regular expression for few multiple line from email body

Question

User-449737870 posted

Hi,

I want to create a regular expression for email body. my requirement is as below

suppose i have the e-mail body like bellow:

Hi,

this is line 1

this is line 2

this is line 3

this is line 4

this is line 5

this is line 6

Regards,

XYZ Team,

I want to search two or more different line e.g this is line 2 and this is line 5  using regular expression

So what will be the regular expression for that kindly help me out.

Answer 1

User2103319870 posted

So what will be the regular expression for that kindly help me out.

You can try with below regex

string yourEmailBody = @"Hi,
                                        this is line 1
                                        this is line 2
                                        this is line 3
                                        this is line 4
                                        this is line 5
                                        this is line 6
                                        Regards,
                                        XYZ Team,";
            string searchPhrase = "this is line 5";
            string MatchPhrase = "(?=(" + searchPhrase.ToLower() + "))";
            int matches = Regex.Matches(yourEmailBody, MatchPhrase).Count;

• Sample Working Demo

Answer 2

User-449737870 posted

Thanks A2H,

But the searchPhrase will contain atleast two lines e.g it will contain this is line 5, this is line 2 in two different place.

Answer 3

User-1838255255 posted

Hi Zishan Ansari,

According to your description and code, i make a modify based on community member a2h's code, please check: 

Sample code: 

int matches = 0;
string yourEmailBody = @"Hi,
                       this is line 1
                       this is line 2
                       this is line 3
                       this is line 4
                       this is line 5
                       this is line 6
                       Regards,
                       XYZ Team,";

            var allsearchPhare = "this is line 8,this is line 3";
            string[] newsearch = allsearchPhare.Split(',');

            for (int i = 0; i < newsearch.Length; i++)
            {
                string MatchPhrase = "(?=(" + newsearch[i].ToLower() + "))";
                int count = Regex.Matches(yourEmailBody, MatchPhrase).Count;
                if (count == 1)
                {
                    matches++;
                }
            }
            Response.Write("Match Lines Count is: " + matches);

Best Regards,

Eric Du 

Answer 4

User-449737870 posted

I found perfect solution as below:

static void Main(string[] args)
        {
            int matches = 0;
            string yourEmailBody = @"Hi,
                       this is line 1
                       this is line 2
                       this is line 3
                       this is line 4
                       this is line 5
                       this is line 6
                       Regards,
                       XYZ Team,";

            var allsearchPhare = "this is line 5,this is line 3";
            string[] newsearch = allsearchPhare.Split(',');

            for (int i = 0; i < newsearch.Length; i++)
            {
                string MatchPhrase = "(?=(" + newsearch[i].ToLower() + "))";
                int count = Regex.Matches(yourEmailBody, MatchPhrase).Count;
                if (count >= 1)
                {
                    matches++;
                }
            }
            if (matches == newsearch.Length)
                Console.WriteLine("All Matches Found");

        }