145 //...I primi 41 numeri di Fibonacci sono:
146 //...0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 (=F10),
147 //...89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765 (=F20),
148 //...
149 Func<int, int> _fibo = null;
150 _fibo = n => n > 1 ? _fibo(n - 1) + _fibo(n - 2) : n;
151 Console.WriteLine( _fibo(20) );
14 /// <summary>
15 /// Create a E-Mail Attach from Stream
16 /// </summary>
17 private static void StreamToAttachment()
18 {
19 //...create the mail message
20 MailMessage _mail = new MailMessage();
21
22 //...set the addresses and content
23 _mail.From = new MailAddress("mailFrom@cbonacci.net");
24 _mail.To.Add("mailFrom@cbonacci.net");
25 _mail.Subject = "Excel: Attachments and Streams";
26 _mail.Body = "... I love C# ...!";
27
28 //... retrieve binary data and save to a stream
29 byte[] _data = _streamBuilder();
30 MemoryStream _stream = new MemoryStream(_data);
31
32 _mail.Attachments.Add(
33 new Attachment(_stream,
34 "cb_example.xls",
35 MediaTypeNames.Text.Plain)
36 );
37
38 //...send the message
39 SmtpClient _smtp = new SmtpClient("127.0.0.1");
40 _smtp.Send(_mail);
41 }
42
43 /// <summary>
44 ///
45 /// </summary>
46 /// <returns></returns>
47 private static byte[] _streamBuilder()
48 {
49 string _xml = _createWorkbookFromdataSet(
50 //...get your data from dataBase
51 GetDataForDB() );
52
53 byte[] _byteData = Encoding.ASCII.GetBytes(_xml);
54 return _byteData;
55 }
56
57 /// <summary>
58 ///
59 /// </summary>
60 /// <param name="sourceData"></param>
61 /// <returns></returns>
62 private static string _createWorkbookFromdataSet(DataSet sourceData)
63 {
64 XmlDataDocument _xmlDataDoc =
65 new XmlDataDocument(sourceData);
66 XslCompiledTransform _xt =
67 new XslCompiledTransform();
68 StreamReader _reader = new
69
70 StreamReader("Excel.xsl");
71 XmlTextReader xRdr = new XmlTextReader(_reader);
72
73 _xt.Load(xRdr, null, null);
74 StringWriter _sw = new StringWriter();
75 _xt.Transform(_xmlDataDoc, null, _sw);
76
77 //...retunr string XML Worksheet.
78 return _sw.ToString();
79 }
1 <xsl:stylesheet version="1.0"
2 xmlns="urn:schemas-microsoft-com:office:spreadsheet"
3 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
4 xmlns:msxsl="urn:schemas-microsoft-com:xslt"
5 xmlns:user="urn:my-scripts"
6 xmlns:o="urn:schemas-microsoft-com:office:office"
7 xmlns:x="urn:schemas-microsoft-com:office:excel"
8 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" >
9
10 <xsl:template match="/">
11 <Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
12 xmlns:o="urn:schemas-microsoft-com:office:office"
13 xmlns:x="urn:schemas-microsoft-com:office:excel"
14 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
15 xmlns:html="http://www.w3.org/TR/REC-html40">
16 <xsl:apply-templates/>
17 </Workbook>
18 </xsl:template>
19
20 <xsl:template match="/*">
21 <Worksheet>
22 <xsl:attribute name="ss:Name">
23 <xsl:value-of select="local-name(/*/*)"/>
24 </xsl:attribute>
25 <Table x:FullColumns="1" x:FullRows="1">
26 <Row>
27 <xsl:for-each select="*[position() = 1]/*">
28 <Cell><Data ss:Type="String">
29 <xsl:value-of select="local-name()"/>
30 </Data></Cell>
31 </xsl:for-each>
32 </Row>
33 <xsl:apply-templates/>
34 </Table>
35 </Worksheet>
36 </xsl:template>
37
38 <xsl:template match="/*/*">
39 <Row>
40 <xsl:apply-templates/>
41 </Row>
42 </xsl:template>
43
44 <xsl:template match="/*/*/*">
45 <Cell><Data ss:Type="String">
46 <xsl:value-of select="."/>
47 </Data></Cell>
48 </xsl:template>
