1 public static void ExportToExcel(DataSet source, string fileName)
2 {
3 System.IO.StreamWriter excelDoc = new System.IO.StreamWriter(fileName);
4 ExportToExcel(source, excelDoc);
5 }
6
7 public static void ExportToExcel(DataTable dtSource, string fileName)
8 {
9 DataSet dsSource = new DataSet();
10 dsSource.Tables.Add(dtSource);
11
12 ExportToExcel(dsSource, fileName);
13 }
14
15 public static void ExportToExcel(DataTable dtSource, System.IO.StreamWriter excelDoc)
16 {
17 DataSet dsSource = new DataSet();
18 dsSource.Tables.Add(dtSource);
19
20 ExportToExcel(dsSource, excelDoc);
21 }
22
23 public static void ExportToExcel(DataSet source, System.IO.StreamWriter excelDoc)
24 {
25 const string startExcelXML = "<xml version>\r\n<Workbook " +
26 "xmlns=\"urn:schemas-microsoft-com:office:spreadsheet\"\r\n" +
27 " xmlns:o=\"urn:schemas-microsoft-com:office:office\"\r\n " +
28 "xmlns:x=\"urn:schemas- microsoft-com:office:" +
29 "excel\"\r\n xmlns:ss=\"urn:schemas-microsoft-com:" +
30 "office:spreadsheet\">\r\n <Styles>\r\n " +
31 "<Style ss:ID=\"Default\" ss:Name=\"Normal\">\r\n " +
32 "<Alignment ss:Vertical=\"Bottom\"/>\r\n <Borders/>" +
33 "\r\n <Font/>\r\n <Interior/>\r\n <NumberFormat/>" +
34 "\r\n <Protection/>\r\n </Style>\r\n " +
35 "<Style ss:ID=\"BoldColumn\">\r\n <Font " +
36 "x:Family=\"Swiss\" ss:Bold=\"1\"/>\r\n </Style>\r\n " +
37 "<Style ss:ID=\"StringLiteral\">\r\n <NumberFormat" +
38 " ss:Format=\"@\"/>\r\n </Style>\r\n <Style " +
39 "ss:ID=\"Decimal\">\r\n <NumberFormat " +
40 "ss:Format=\"0\"/>\r\n </Style>\r\n " +
41 "<Style ss:ID=\"Integer\">\r\n <NumberFormat " +
42 "ss:Format=\"0\"/>\r\n </Style>\r\n <Style " +
43 "ss:ID=\"DateLiteral\">\r\n <NumberFormat " +
44 "ss:Format=\"mm/dd/yyyy;@\"/>\r\n </Style>\r\n " +
45 "</Styles>\r\n ";
46 const string endExcelXML = "</Workbook>";
47
48 int rowCount = 0;
49 int sheetCount = 1;
50 excelDoc.Write(startExcelXML);
51 excelDoc.Write("<Worksheet ss:Name=\"Sheet" + sheetCount + "\">");
52 excelDoc.Write("<Table>");
53 excelDoc.Write("<Row>");
54 for (int x = 0; x < source.Tables[0].Columns.Count; x++)
55 {
56 excelDoc.Write("<Cell ss:StyleID=\"BoldColumn\"><Data ss:Type=\"String\">");
57 excelDoc.Write(source.Tables[0].Columns[x].ColumnName);
58 excelDoc.Write("</Data></Cell>");
59 }
60 excelDoc.Write("</Row>");
61 foreach (DataRow x in source.Tables[0].Rows)
62 {
63 rowCount++;
64 if (rowCount == 64000)
65 {
66 rowCount = 0;
67 sheetCount++;
68 excelDoc.Write("</Table>");
69 excelDoc.Write(" </Worksheet>");
70 excelDoc.Write("<Worksheet ss:Name=\"Sheet" + sheetCount + "\">");
71 excelDoc.Write("<Table>");
72 }
73 excelDoc.Write("<Row>");
74 for (int y = 0; y < source.Tables[0].Columns.Count; y++)
75 {
76 System.Type rowType;
77 rowType = x[y].GetType();
78 switch (rowType.ToString())
79 {
80 case "System.String":
81 string XMLstring = x[y].ToString();
82 XMLstring = XMLstring.Trim();
83 XMLstring = XMLstring.Replace("&", "&");
84 XMLstring = XMLstring.Replace(">", ">");
85 XMLstring = XMLstring.Replace("<", "<");
86 excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" +
87 "<Data ss:Type=\"String\">");
88 excelDoc.Write(XMLstring);
89 excelDoc.Write("</Data></Cell>");
90 break;
91 case "System.DateTime":
92 DateTime XMLDate = (DateTime)x[y];
93 string XMLDatetoString = "";
94 XMLDatetoString = XMLDate.Year.ToString() +
95 "-" +
96 (XMLDate.Month < 10 ? "0" +
97 XMLDate.Month.ToString() : XMLDate.Month.ToString()) +
98 "-" +
99 (XMLDate.Day < 10 ? "0" +
100 XMLDate.Day.ToString() : XMLDate.Day.ToString()) +
101 "T" +
102 (XMLDate.Hour < 10 ? "0" +
103 XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) +
104 ":" +
105 (XMLDate.Minute < 10 ? "0" +
106 XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) +
107 ":" +
108 (XMLDate.Second < 10 ? "0" +
109 XMLDate.Second.ToString() : XMLDate.Second.ToString()) +
110 ".000";
111 excelDoc.Write("<Cell ss:StyleID=\"DateLiteral\">" +
112 "<Data ss:Type=\"DateTime\">");
113 excelDoc.Write(XMLDatetoString);
114 excelDoc.Write("</Data></Cell>");
115 break;
116 case "System.Boolean":
117 excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" +
118 "<Data ss:Type=\"String\">");
119 excelDoc.Write(x[y].ToString());
120 excelDoc.Write("</Data></Cell>");
121 break;
122 case "System.Int16":
123 case "System.Int32":
124 case "System.Int64":
125 case "System.Byte":
126 excelDoc.Write("<Cell ss:StyleID=\"Integer\">" +
127 "<Data ss:Type=\"Number\">");
128 excelDoc.Write(x[y].ToString());
129 excelDoc.Write("</Data></Cell>");
130 break;
131 case "System.Decimal":
132 case "System.Double":
133 excelDoc.Write("<Cell ss:StyleID=\"Decimal\">" +
134 "<Data ss:Type=\"Number\">");
135 excelDoc.Write(x[y].ToString());
136 excelDoc.Write("</Data></Cell>");
137 break;
138 case "System.DBNull":
139 excelDoc.Write("<Cell ss:StyleID=\"StringLiteral\">" +
140 "<Data ss:Type=\"String\">");
141 excelDoc.Write("");
142 excelDoc.Write("</Data></Cell>");
143 break;
144 default:
145 throw (new Exception(rowType.ToString() + " not handled."));
146 }
147 }
148 excelDoc.Write("</Row>");
149 }
150 excelDoc.Write("</Table>");
151 excelDoc.Write(" </Worksheet>");
152 excelDoc.Write(endExcelXML);
153 excelDoc.Close();
154 }
