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有一客戶需求：

1、要從SQL Server資料庫匯出並生成Excel ;

2、使用者下載對應的Excel並填寫上傳再匯入到SQL server。

費了將近六個小時，故一定要把過程寫下來，希望看到此文的朋友少走些不必要的彎路。

首先，想到的是直接匯出到客戶端，程式碼如下：

[c-sharp] view plain copy print ?

1. public static void DataSetToExcel(DataSet oDS, HttpResponse Response, string fileName)  
2.         {  
3.             if (oDS == null || oDS.Tables[0] == null || oDS.Tables[0].Rows.Count == 0) { return; }  
4.             Response.Clear();  
5.             //Encoding pageEncode = Encoding.GetEncoding(PageEncode);  
6.             HttpContext.Current.Response.Charset = "gb2312";  
7.             //Response.ContentType = "application/vnd-excel";//"application/vnd.ms-excel";  
8.             //Response.ContentType = "application/x-octet-stream";//"application/vnd.ms-excel";  
9.             Response.ContentType = "text/csv";//"application/vnd.ms-excel";  
10.             Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".cvs");  
11.             System.IO.StringWriter oSW = new System.IO.StringWriter();  
12.             HtmlTextWriter oHW = new HtmlTextWriter(oSW);  
13.             DataGrid dg = new DataGrid();  
14.             dg.DataSource = oDS.Tables[0];  
15.             dg.DataBind();  
16.             dg.RenderControl(oHW);  
17.             Response.Write(oSW.ToString());  
18.             Response.Flush();  
19.             Response.Close();  
20.         }  

public static void DataSetToExcel(DataSet oDS, HttpResponse Response, string fileName)        {            if (oDS == null || oDS.Tables[0] == null || oDS.Tables[0].Rows.Count == 0) { return; }            Response.Clear();            //Encoding pageEncode = Encoding.GetEncoding(PageEncode);            HttpContext.Current.Response.Charset = "gb2312";            //Response.ContentType = "application/vnd-excel";//"application/vnd.ms-excel";            //Response.ContentType = "application/x-octet-stream";//"application/vnd.ms-excel";            Response.ContentType = "text/csv";//"application/vnd.ms-excel";            Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".cvs");            System.IO.StringWriter oSW = new System.IO.StringWriter();            HtmlTextWriter oHW = new HtmlTextWriter(oSW);            DataGrid dg = new DataGrid();            dg.DataSource = oDS.Tables[0];            dg.DataBind();            dg.RenderControl(oHW);            Response.Write(oSW.ToString());            Response.Flush();            Response.Close();        }   

這樣生成是生成了！ 客戶也可以用Excel直接開啟並編輯，問題來了！ 上傳時出錯，仔細看看生成的Excel.xls,

用記事本開啟，內容大致如下：

[css] view plain copy print ?

1. <table cellspacing="0" rules="all" border="1" style="border-collapse:collapse;" mce_style="border-collapse:collapse;">  
2.     <tr>  
3.         <td>品名</td><td>最高價格</td><td>最低價格</td><td>平均價格</td><td>計量單位</td><td>備註</td>  
4.     </tr><tr>  
5.         <td>青菜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
6.     </tr><tr>  
7.         <td>南瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
8.     </tr><tr>  
9.         <td>瓠子</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
10.     </tr><tr>  
11.         <td>冬春筍</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
12.     </tr><tr>  
13.         <td>雪裡蕻</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
14.     </tr><tr>  
15.         <td>櫻桃蘿蔔</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
16.     </tr><tr>  
17.         <td>佛手瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
18.     </tr><tr>  
19.         <td>白菜鼎</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
20.     </tr><tr>  
21.         <td>蒜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
22.     </tr><tr>  
23.         <td>食用菌</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
24.     </tr><tr>  
25.         <td>黃瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>  
26.     </tr>  
27. </table>   

<table cellspacing="0" rules="all" border="1" style="border-collapse:collapse;" mce_style="border-collapse:collapse;">    <tr>        <td>品名</td><td>最高價格</td><td>最低價格</td><td>平均價格</td><td>計量單位</td><td>備註</td>    </tr><tr>        <td>青菜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>南瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>瓠子</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>冬春筍</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>雪裡蕻</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>櫻桃蘿蔔</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>佛手瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>白菜鼎</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>蒜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>食用菌</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr><tr>        <td>黃瓜</td><td> </td><td> </td><td> </td><td>元/公斤</td><td> </td>    </tr></table>   

 

原來，就是純粹的html格式，披了件Excel的外衣。這樣使用者傳上來的檔案當然不是標準的Excel格式了！

於是， 想到直接生成xml格式的Excel文件，方法如下 ：

 

 

[c-sharp] view plain copy print ?

1. /// <summary>  
2.         /// 執行匯出  
3.         /// </summary>  
4.         /// <param name="ds">要匯出的DataSet</param>  
5.         /// <param name="strExcelFileName">要匯出的檔名</param>  
6.         public static void ExportToExcel(DataSet source, string fileName)  
7.         {  
8.             System.IO.StreamWriter excelDoc;  
9.             excelDoc = new System.IO.StreamWriter(fileName);  
10.             const string startExcelXML = "<xml version>/r/n<Workbook " +  
11.                   "xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/"/r/n" +  
12.                   " xmlns:o=/"urn:schemas-microsoft-com:office:office/"/r/n " +  
13.                   "xmlns:x=/"urn:schemas-    microsoft-com:office:" +  
14.                   "excel/"/r/n xmlns:ss=/"urn:schemas-microsoft-com:" +  
15.                   "office:spreadsheet/">/r/n <Styles>/r/n " +  
16.                   "<Style ss:ID=/"Default/" ss:Name=/"Normal/">/r/n " +  
17.                   "<Alignment ss:Vertical=/"Bottom/"/>/r/n <Borders/>" +  
18.                   "/r/n <Font/>/r/n <Interior/>/r/n <NumberFormat/>" +  
19.                   "/r/n <Protection/>/r/n </Style>/r/n " +  
20.                   "<Style ss:ID=/"BoldColumn/">/r/n <Font " +  
21.                   "x:Family=/"Swiss/" ss:Bold=/"1/"/>/r/n </Style>/r/n " +  
22.                   "<Style     ss:ID=/"StringLiteral/">/r/n <NumberFormat" +  
23.                   " ss:Format=/"@/"/>/r/n </Style>/r/n <Style " +  
24.                   "ss:ID=/"Decimal/">/r/n <NumberFormat " +  
25.                   "ss:Format=/"0.0000/"/>/r/n </Style>/r/n " +  
26.                   "<Style ss:ID=/"Integer/">/r/n <NumberFormat " +  
27.                   "ss:Format=/"0/"/>/r/n </Style>/r/n <Style " +  
28.                   "ss:ID=/"DateLiteral/">/r/n <NumberFormat " +  
29.                   "ss:Format=/"mm/dd/yyyy;@/"/>/r/n </Style>/r/n " +  
30.                   "</Styles>/r/n ";  
31.             const string endExcelXML = "</Workbook>";  
32.             int rowCount = 0;  
33.             int sheetCount = 1;  
34.             /**//* 
35.            <xml version> 
36.            <Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" 
37.            xmlns:o="urn:schemas-microsoft-com:office:office" 
38.            xmlns:x="urn:schemas-microsoft-com:office:excel" 
39.            xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"> 
40.            <Styles> 
41.            <Style ss:ID="Default" ss:Name="Normal"> 
42.              <Alignment ss:Vertical="Bottom"/> 
43.              <Borders/> 
44.              <Font/> 
45.              <Interior/> 
46.              <NumberFormat/> 
47.              <Protection/> 
48.            </Style> 
49.            <Style ss:ID="BoldColumn"> 
50.              <Font x:Family="Swiss" ss:Bold="1"/> 
51.            </Style> 
52.            <Style ss:ID="StringLiteral"> 
53.              <NumberFormat ss:Format="@"/> 
54.            </Style> 
55.            <Style ss:ID="Decimal"> 
56.              <NumberFormat ss:Format="0.0000"/> 
57.            </Style> 
58.            <Style ss:ID="Integer"> 
59.              <NumberFormat ss:Format="0"/> 
60.            </Style> 
61.            <Style ss:ID="DateLiteral"> 
62.              <NumberFormat ss:Format="mm/dd/yyyy;@"/> 
63.            </Style> 
64.            </Styles> 
65.            <Worksheet ss:Name="Sheet1"> 
66.            </Worksheet> 
67.            </Workbook> 
68.            */  
69.             excelDoc.Write(startExcelXML);  
70.             excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");  
71.             excelDoc.Write("<Table>");  
72.             excelDoc.Write("<Row>");  
73.             for (int x = 0; x < source.Tables[0].Columns.Count; x++)  
74.             {  
75.                 excelDoc.Write("<Cell ss:StyleID=/"BoldColumn/"><Data ss:Type=/"String/">");  
76.                 excelDoc.Write(source.Tables[0].Columns[x].ColumnName);  
77.                 excelDoc.Write("</Data></Cell>");  
78.             }  
79.             excelDoc.Write("</Row>");  
80.             foreach (DataRow x in source.Tables[0].Rows)  
81.             {  
82.                 rowCount++;  
83.                 //if the number of rows is > 64000 create a new page to continue output  
84.                 if (rowCount == 64000)  
85.                 {  
86.                     rowCount = 0;  
87.                     sheetCount++;  
88.                     excelDoc.Write("</Table>");  
89.                     excelDoc.Write(" </Worksheet>");  
90.                     excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");  
91.                     excelDoc.Write("<Table>");  
92.                 }  
93.                 excelDoc.Write("<Row>"); //ID=" + rowCount + "  
94.                 for (int y = 0; y < source.Tables[0].Columns.Count; y++)  
95.                 {  
96.                     System.Type rowType;  
97.                     rowType = x[y].GetType();  
98.                     switch (rowType.ToString())  
99.                     {  
100.                         case "System.String":  
101.                             string XMLstring = x[y].ToString();  
102.                             XMLstring = XMLstring.Trim();  
103.                             XMLstring = XMLstring.Replace("&", "&");  
104.                             XMLstring = XMLstring.Replace(">", ">");  
105.                             XMLstring = XMLstring.Replace("<", "<");  
106.                             excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +  
107.                                            "<Data ss:Type=/"String/">");  
108.                             excelDoc.Write(XMLstring);  
109.                             excelDoc.Write("</Data></Cell>");  
110.                             break;  
111.                         case "System.DateTime":  
112.                             //Excel has a specific Date Format of YYYY-MM-DD followed by    
113.                             //the letter 'T' then hh:mm:sss.lll Example 2005-01-31T24:01:21.000  
114.                             //The Following Code puts the date stored in XMLDate   
115.                             //to the format above  
116.                             DateTime XMLDate = (DateTime)x[y];  
117.                             string XMLDatetoString = ""; //Excel Converted Date  
118.                             XMLDatetoString = XMLDate.Year.ToString() +  
119.                                  "-" +  
120.                                  (XMLDate.Month < 10 ? "0" +  
121.                                  XMLDate.Month.ToString() : XMLDate.Month.ToString()) +  
122.                                  "-" +  
123.                                  (XMLDate.Day < 10 ? "0" +  
124.                                  XMLDate.Day.ToString() : XMLDate.Day.ToString()) +  
125.                                  "T" +  
126.                                  (XMLDate.Hour < 10 ? "0" +  
127.                                  XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) +  
128.                                  ":" +  
129.                                  (XMLDate.Minute < 10 ? "0" +  
130.                                  XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) +  
131.                                  ":" +  
132.                                  (XMLDate.Second < 10 ? "0" +  
133.                                  XMLDate.Second.ToString() : XMLDate.Second.ToString()) +  
134.                                  ".000";  
135.                             excelDoc.Write("<Cell ss:StyleID=/"DateLiteral/">" +  
136.                                          "<Data ss:Type=/"DateTime/">");  
137.                             excelDoc.Write(XMLDatetoString);  
138.                             excelDoc.Write("</Data></Cell>");  
139.                             break;  
140.                         case "System.Boolean":  
141.                             excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +  
142.                                         "<Data ss:Type=/"String/">");  
143.                             excelDoc.Write(x[y].ToString());  
144.                             excelDoc.Write("</Data></Cell>");  
145.                             break;  
146.                         case "System.Int16":  
147.                         case "System.Int32":  
148.                         case "System.Int64":  
149.                         case "System.Byte":  
150.                             excelDoc.Write("<Cell ss:StyleID=/"Integer/">" +  
151.                                     "<Data ss:Type=/"Number/">");  
152.                             excelDoc.Write(x[y].ToString());  
153.                             excelDoc.Write("</Data></Cell>");  
154.                             break;  
155.                         case "System.Decimal":  
156.                         case "System.Double":  
157.                             excelDoc.Write("<Cell ss:StyleID=/"Decimal/">" +  
158.                                   "<Data ss:Type=/"Number/">");  
159.                             excelDoc.Write(x[y].ToString());  
160.                             excelDoc.Write("</Data></Cell>");  
161.                             break;  
162.                         case "System.DBNull":  
163.                             excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +  
164.                                   "<Data ss:Type=/"String/">");  
165.                             excelDoc.Write("");  
166.                             excelDoc.Write("</Data></Cell>");  
167.                             break;  
168.                         default:  
169.                             throw (new Exception(rowType.ToString() + " not handled."));  
170.                     }  
171.                 }  
172.                 excelDoc.Write("</Row>");  
173.             }  
174.             excelDoc.Write("</Table>");  
175.             excelDoc.Write(" </Worksheet>");  
176.             excelDoc.Write(endExcelXML);  
177.             excelDoc.Close();  
178.         }  

/// <summary>        /// 執行匯出        /// </summary>        /// <param name="ds">要匯出的DataSet</param>        /// <param name="strExcelFileName">要匯出的檔名</param>        public static void ExportToExcel(DataSet source, string fileName)        {            System.IO.StreamWriter excelDoc;            excelDoc = new System.IO.StreamWriter(fileName);            const string startExcelXML = "<xml version>/r/n<Workbook " +                  "xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/"/r/n" +                  " xmlns:o=/"urn:schemas-microsoft-com:office:office/"/r/n " +                  "xmlns:x=/"urn:schemas-    microsoft-com:office:" +                  "excel/"/r/n xmlns:ss=/"urn:schemas-microsoft-com:" +                  "office:spreadsheet/">/r/n <Styles>/r/n " +                  "<Style ss:ID=/"Default/" ss:Name=/"Normal/">/r/n " +                  "<Alignment ss:Vertical=/"Bottom/"/>/r/n <Borders/>" +                  "/r/n <Font/>/r/n <Interior/>/r/n <NumberFormat/>" +                  "/r/n <Protection/>/r/n </Style>/r/n " +                  "<Style ss:ID=/"BoldColumn/">/r/n <Font " +                  "x:Family=/"Swiss/" ss:Bold=/"1/"/>/r/n </Style>/r/n " +                  "<Style     ss:ID=/"StringLiteral/">/r/n <NumberFormat" +                  " ss:Format=/"@/"/>/r/n </Style>/r/n <Style " +                  "ss:ID=/"Decimal/">/r/n <NumberFormat " +                  "ss:Format=/"0.0000/"/>/r/n </Style>/r/n " +                  "<Style ss:ID=/"In