1. 拼成出完整的HMTL的Table代码片段后，转成二进制byte[]类型并存入数据库中，供下载时调出来使用。
System.Text.StringBuilder sb = new StringBuilder();
sb.AppendLine(@"<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>");
sb.AppendLine(@"<head>");
sb.AppendLine(@"<meta http-equiv='Content-Type' content='text/html; charset=utf-8'>");
sb.AppendLine(@"<meta name='ProgId' content='Excel.Sheet'>");
sb.AppendLine(@"<style>");
sb.AppendLine(@".Header{background-color:#B8CCE4;font-family: Arial;}");
sb.AppendLine(@".Content{background-color:#B8CCE4;text-align: left;font-family: Times New Roman;}");
sb.AppendLine(@".N0{background-color:#B8CCE4;text-align: right ;font-family: Times New Roman;mso-number-format:'#\,##0';}");
sb.AppendLine(@".N2{background-color:#B8CCE4;text-align: right ;font-family: Times New Roman;mso-number-format:'#\,##0.00';}");
sb.AppendLine(@".N6{background-color:#B8CCE4;text-align: right ;font-family: Times New Roman;mso-number-format:'#\,##0.000000';}");
//下面一行的代码，是为了解决超过11位数字的纯文本导出Excel后，Excel默认会转为科学计数法表示，加入下面的class并标注在需要显示的字段的td后，导出Excel可以强制把数字用文本表示
sb.AppendLine(@".CvtTxt{background-color:#B8CCE4;text-align: left ;font-family: Times New Roman;mso-number-format:'@';}");
sb.AppendLine(@"</style>");
sb.AppendLine(@"</head>");
sb.AppendLine(@"<body>");
sb.AppendLine(@"<div id='divSplit' align='center' x:publishsource='Excel'>");
sb.AppendLine(@" <table border='2' style='border-collapse:collapse;'>");
sb.AppendLine(@" <tr>");
sb.AppendLine(@" </tr>");
sb.AppendLine(@" <tr>");
sb.AppendLine(@" <th colspan='14' bgcolor='#538ED5' style='text-align: center; font-family: Times New Roman'>" + "MyCoreInfo Provide" + "</th>");
sb.AppendLine(@" </tr>");
if (exchangeRate != null)
{
sb.AppendLine(@" <tr>");
sb.AppendLine(@" <th colspan='11' bgcolor='#B8CCE4' style='border-right:0'></th>");
sb.AppendLine(@" <th bgcolor='#B8CCE4' style='border-right:0;border-left:0;text-align:left'>Exchange Rate: </th>");
sb.AppendLine(@" <th colspan='2' bgcolor='#B8CCE4' style='border-left:0;text-align:right;mso-number-format:#\,##0.000000'>" + exchangeRate.GetValueOrDefault().ToString("N6") + "</th>");
sb.AppendLine(@" </tr>");
}
if (stockPrice != null)
{
sb.AppendLine(@" <tr>");
sb.AppendLine(@" <th colspan='11' bgcolor='#B8CCE4' style='border-right:0'></th>");
sb.AppendLine(@" <th bgcolor='#B8CCE4' style='border-right:0;border-left:0;text-align:left'>Stock Closing Price: </th>");
sb.AppendLine(@" <th colspan='2' bgcolor='#B8CCE4' style='border-left:0;text-align:right;mso-number-format:#\,##0.00'>" + stockPrice.GetValueOrDefault().ToString("N2") + "</th>");
sb.AppendLine(@" </tr>");
}
sb.AppendLine(@" <tr>");
sb.AppendLine(@" <td class='Content'>Forbid Exercise</td>");
sb.AppendLine(@" <td class='Content'>OrderID</td>");
sb.AppendLine(@" <td class='Content'>GrantID</td>");
sb.AppendLine(@" <td class='Content'>GrantDate</td>");
sb.AppendLine(@" <td class='Content'>Exercise Date(YYYY-MM-DD)</td>");
sb.AppendLine(@" <td class='Content'>Officer</td>");
sb.AppendLine(@" <td class='Content'>Employee ID</td>");
sb.AppendLine(@" <td class='Content'>Brokerage Account #</td>");
sb.AppendLine(@" <td class='Content'>English Name</td>");
sb.AppendLine(@" <td class='Content'>Shares Vested</td>");
sb.AppendLine(@" <td class='Content'>Shares Withheld for Taxes</td>");
sb.AppendLine(@" <td class='Content'>Withholding Tax" + taxCurrency + "</td>");
sb.AppendLine(@" <td class='Content'>Net Shares</td>");
sb.AppendLine(@" <td class='Content'>Option Cost" + currency + "</td>");
sb.AppendLine(@" </tr>");
if (!String.IsNullOrEmpty(orderDetail.GrantID))
{
sb.AppendLine(@" <td class='CvtTxt'>" + orderDetail.GrantID + "</td>");
}
else
{
sb.AppendLine(@" <td bgcolor='#B8CCE4' style='text-align: left;font-family: Times New Roman'></td>");
}
。。。
sb.AppendLine(@" </tr>");
sb.AppendLine(@" </table>");
sb.AppendLine(@" </div>");
sb.AppendLine(@" </body>");
sb.AppendLine(@"</html>");
bytes = ASCIIEncoding.UTF8.GetBytes(sb.ToString());
2. 下载时从DB中取出上面的bytes[], 然后扔给浏览器下载，代码如下：
string type = context.Request.QueryString["type"];
try
{
IFileDownloadHandler handler = GetHandler("xls");
if (handler == null)
{
throw new Exception("未知的文件类型");
}
string fileName;
byte[] fileContent;
//取出byte[]并给浏览器下载xls文件类型的文件
handler.GetFile(context, out fileName, out fileContent);
fileName = HttpUtility.UrlEncode(fileName, Encoding.UTF8);
fileName = fileName.Replace("+", "%20");
context.Response.Clear();
context.Response.Charset = "utf-8";
context.Response.Buffer = true;
context.Response.AddHeader("content-disposition",
string.Format("attachment;filename={0}", fileName));
context.Response.ContentEncoding = Encoding.UTF8;
context.Response.ContentType = String.Format("application/octet-stream");
const int buffersize = 1024 * 16;
int count = fileContent.Length / buffersize;
int i;
for (i = 0; i < count; i++)
{
context.Response.OutputStream.Write(fileContent, i * buffersize, buffersize);
}
int remainder = fileContent.Length % buffersize;
if (remainder != 0)
{
context.Response.OutputStream.Write(fileContent, i * buffersize, remainder);
}
try
{
context.Response.End();
}
catch (ThreadAbortException ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
}
catch (Exception exp)
{
if (exp is ThreadAbortException)
{
System.Diagnostics.Debug.WriteLine(exp.Message);
}
else
{
context.Response.Write(exp.Message);
}
context.Response.End();
}
/// <summary>
/// 获取文件名及文件内容
/// </summary>
/// <param name="context">上下文</param>
/// <param name="fileName">文件名</param>
/// <param name="fileContent">文件内容</param>
public void GetFile(HttpContext context, out string fileName, out byte[] fileContent)
{
Guid fileID = new Guid(context.Request.QueryString["FileID"]);
IUploadFileService service = null;// ServiceFactory.FindService<IUploadFileService>();
try
{
// service = ServiceFactory.FindService<IUploadFileService>();
// var file = service.GetByUploadFileID(fileID);
UploadFileBizProcess bizObj = UploadFileBizProcess.GetInstance();
var file = bizObj.GetByUploadFileID(fileID);
if (file == null)
{
throw new Exception("文件不存在");
}
fileName = file.FileName;
fileContent = file.FileContent;
}
finally
{
Helper.Dispose(service);
}
}
在css中加入：mso-number-format定义数据格式，格式可以在excel中查看自定义格式，具体可以参考一下：
mso-number-format:"0" NO Decimals
mso-number-format:"0.000" 3 Decimals
mso-number-format:"#\,##0.000" Comma with 3 dec
mso-number-format:"mm/dd/yy" Date7
mso-number-format:"mmmm d\, yyyy" Date9
mso-number-format:"m/d/yy h:mm AM/PM" D -T AMPM
mso-number-format:"Short Date" 01/03/1998
mso-number-format:"Medium Date" 01-mar-98
mso-number-format:"d-mmm-yyyy" 01-mar-1998
mso-number-format:"Short Time" 5:16
mso-number-format:"Medium Time" 5:16 am
mso-number-format:"Long Time" 5:16:21:00
mso-number-format:"Percent" Percent - two decimals
mso-number-format:"0%" Percent - no decimals
mso-number-format:"0.E+00" Scientific Notation
mso-number-format:"@" Text
mso-number-format:"# ???/???" Fractions - up to 3 digits (312/943)