How to find text between two lines in Notepad using C#

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I need to find all the lines between "--=_NextPart_SMP_" using c#

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001

Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0001.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
V1ZkcJB6ZGqIbFZXfap+iJSZoaKhYXiwva+cu5CeoZr/2wBDARscHCUhJUkpKUmaZ1dnmpqampqa
mpqampqampqampqampqampqampqampqampqampqampqampqampqampqampr/wAARCAQABQADASIA
AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001

Posted 1-Dec-14 3:49am

Renjith_R

Updated 1-Dec-14 3:50am

v2

Add a Solution

4 solutions

Solution 3

If you want, you can use some available library to parse mail messages. I would recommend open-source OpenPop.NET:
http://sourceforge.net/projects/hpop[^].

This library is not perfectly well written, but it thoroughly works with all those MIME standards and contains a POP3 client in the code. You can use it directly, or simply use as a reference, which is also useful.

—SA

Posted 1-Dec-14 5:32am

Sergey Alexandrovich Kryukov

Comments

Maciej Los 1-Dec-14 14:44pm

5ed!

Sergey Alexandrovich Kryukov 1-Dec-14 21:41pm

Thank you, Maciej.
—SA

Maria Lopez 7-Dec-14 7:34am

+5

Sergey Alexandrovich Kryukov 7-Dec-14 12:02pm

Thank you, Maria.
—SA

Solution 1

Try a regex:

(--=_NextPart_SMP_)(.*)(?=--=_NextPart_SMP_)

Should do it.

Posted 1-Dec-14 3:57am

OriginalGriff

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BillWoodruff · Accepted Answer · 2014-12-01T13:45:00

Solution 4

Another alternative is to use String.Split:

C#

private string[] splitString = new string[]{@"--=_NextPart_SMP_"};

private List<string> getSections(string source)
{
    return source.Split(splitString, StringSplitOptions.RemoveEmptyEntries).ToList();
}


// test in a method body

private string source = @"Your test content goes here";

List<string> result = getSections(source);

if(result == null) throw new EvaluateException("can't parse source !");
            
for (int i = 0; i < result.Count; i++)
{
    Console.WriteLine("Section: {0} Value: {1}",i.ToString(),result[i]);
}

Posted 1-Dec-14 13:45pm

BillWoodruff

Updated 1-Dec-14 21:02pm

v2

Comments

TheRealSteveJudge 2-Dec-14 2:49am

Elegant solution. 5 stars

Renjith_R 2-Dec-14 5:19am

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0004.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0005.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
wHc0EKFY70+6f4h6UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0006.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
uxZjknk0wKjLkn6n+ZoC8H/dP8qmAUj7yg5PVgO5oIUKx3p90/xD0pAf/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0007.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
/M0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6UgP/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0009.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
zwMYpkkrSY3Y44GFA/lSOxdizHJPJpgVGXJP1P8AM0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6
UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001--

I need to get the decoded characters like /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q== from the above text documents

TheRealSteveJudge 2-Dec-14 8:16am

I tried this solution and it definitely works!

TheRealSteveJudge · Accepted Answer · 2014-12-01T04:09:00

Solution 2

Hi,

please have a look at the following example.

C#

string pattern = "--=_NextPart_SMP(?<result>.*)--=_NextPart_SMP";

Regex regex = new Regex(pattern);

Match match = regex.Match("--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001--=_NextPart_SMP");

if(match.Success)
{
    string result = match.Groups["RESULT"].Value;
}

This will give you "_1d0087c4c718772_aee00768_00000001"

Best regards,
Stephan

Posted 1-Dec-14 4:09am

TheRealSteveJudge

Updated 2-Dec-14 2:15am

v2

Comments

Renjith_R 1-Dec-14 10:45am

While debugging the above code am Getting result as Null, Actually this is a test document contain more than 10 + section starts with "--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001", I need to get all the section between each "--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001"

BillWoodruff 1-Dec-14 19:31pm

"this is a test document contain more than 10 + section starts with:" that's the kind of important information you should include in your question.

TheRealSteveJudge 1-Dec-14 10:51am

OK. That is a different case.
Can you post the complete test document?

Renjith_R 2-Dec-14 5:14am

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0004.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0005.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
wHc0EKFY70+6f4h6UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0006.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
uxZjknk0wKjLkn6n+ZoC8H/dP8qmAUj7yg5PVgO5oIUKx3p90/xD0pAf/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0007.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
/M0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6UgP/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0009.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
zwMYpkkrSY3Y44GFA/lSOxdizHJPJpgVGXJP1P8AM0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6
UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001--

Renjith_R 2-Dec-14 5:15am

I need to get the decoded characters like /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q== from the above text documents

TheRealSteveJudge 2-Dec-14 5:19am

Please try solution 4.

Renjith_R 2-Dec-14 5:43am

I have tried that and its not working,Please suggest any other method to get this done. Thanks in advance

TheRealSteveJudge 2-Dec-14 7:16am

Please try again solution 4.

Replace "private string[] splitString = new string[]{@"--=_NextPart_SMP_"};"

by

"private string[] splitString = new string[] { @"--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001" };"

Renjith_R 2-Dec-14 7:36am

I have tried that already, sitll its not working

TheRealSteveJudge 2-Dec-14 8:12am

This makes me wonder.
I tried and get e.g.

Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0004.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q==

as one of six results.

This is the source code:

private void Button_Click(object sender, RoutedEventArgs e)
{
string source = @"--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0004.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
kfeUHJ6sB3NBChWO9Pun+IelID//2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0005.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
wHc0EKFY70+6f4h6UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0006.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
uxZjknk0wKjLkn6n+ZoC8H/dP8qmAUj7yg5PVgO5oIUKx3p90/xD0pAf/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0007.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
/M0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6UgP/9k=

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: screenshot_0009.jpeg

/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDABkRExYTEBkWFBYcGxkeJT4pJSIiJUw3Oi0+WlBfXllQ
zwMYpkkrSY3Y44GFA/lSOxdizHJPJpgVGXJP1P8AM0BeD/un+VTAKR95QcnqwHc0EKFY70+6f4h6
UgP/2Q==

--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001--";

List<string> result = getSections(source);

if(result == null) throw new EvaluateException("can't parse source !");

for (int i = 0; i < result.Count; i++)
{
Console.WriteLine("Section: {0} Value: {1}",i.ToString(),result[i]);
}

}

private string[] splitString = new string[] { @"--=_NextPart_SMP_1d0087c4c718772_aee00768_00000001" };

private List<string> getSections(string source)
{
return source.Split(splitString, StringSplitOptions.RemoveEmptyEntries).ToList();
}

}

Renjith_R 2-Dec-14 9:05am

i tried reading through stream reader, by passing the string value directly its working.
string source = @"D:\MHTTest\Image\Imagetest.txt";