通过浏览器将多个表格导出到Excel
https://stackoverflow.com/questions/208018
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03-07-2019 - |
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我需要在客户端计算机上将多个数据表导出到Excel，每个表都放在自己的工作表中。如果它只是一张，我会使用Excel / csv内容类型，但我听说过一些可以代表整个工作簿的XML格式。我不想沿着Packaging和.xlsx路线走，所以我需要标准的.xls。
我们的错误跟踪器Gemini曾经有一个导出函数，它生成一个Excel文件，Excel自动打开它作为多表工作簿，但我找不到它。是否还有这样的机制，我在哪里可以找到该架构？
解决方案
如果您不想创建，可以使用此库您自己的Excel XML编写器库。
其他提示
在Excel中，您可以以XML格式保存工作簿。 （在Excel 2007中，它被称为XML Spreadsheet 2003）。
这可能会让你开始。
使用以下单独的类文件和page.cs文件在按钮单击时粘贴这样的函数： ExcelHelperNS.ExcelHelper.ToExcel（Dataset1，＆quot; ExcelFileName＆quot;，Page.Response）;
在单独的课程中使用它，它会起作用..
公共类ExcelHelper { //对每张表格的行限制较旧的excel版本，excel 2003的行限制为65536 const int rowLimit = 65000;
private static string getWorkbookTemplate()
{
var sb = new StringBuilder(818);
sb.AppendFormat(@"<?xml version=""1.0""?>{0}", Environment.NewLine);
sb.AppendFormat(@"<?mso-application progid=""Excel.Sheet""?>{0}", Environment.NewLine);
sb.AppendFormat(@"<Workbook xmlns=""urn:schemas-microsoft-com:office:spreadsheet""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:o=""urn:schemas-microsoft-com:office:office""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:x=""urn:schemas-microsoft-com:office:excel""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:ss=""urn:schemas-microsoft-com:office:spreadsheet""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:html=""http://www.w3.org/TR/REC-html40"">{0}", Environment.NewLine);
sb.AppendFormat(@" <Styles>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""Default"" ss:Name=""Normal"">{0}", Environment.NewLine);
sb.AppendFormat(@" <Alignment ss:Vertical=""Bottom""/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Borders/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Font ss:FontName=""Calibri"" x:Family=""Swiss"" ss:Size=""11"" ss:Color=""#000000""/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Interior/>{0}", Environment.NewLine);
sb.AppendFormat(@" <NumberFormat/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Protection/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""s62"">{0}", Environment.NewLine);
sb.AppendFormat(@" <Font ss:FontName=""Calibri"" x:Family=""Swiss"" ss:Size=""11"" ss:Color=""#000000""{0}", Environment.NewLine);
sb.AppendFormat(@" ss:Bold=""1""/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""s63"">{0}", Environment.NewLine);
sb.AppendFormat(@" <NumberFormat ss:Format=""Short Date""/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" </Styles>{0}", Environment.NewLine);
sb.Append(@"{0}\r\n</Workbook>");
return sb.ToString();
}
private static string replaceXmlChar(string input)
{
input = input.Replace("&", "&");
input = input.Replace("<", "<");
input = input.Replace(">", ">");
input = input.Replace("\"", """);
input = input.Replace("'", "'");
return input;
}
private static string getCell(Type type, object cellData)
{
var data = (cellData is DBNull) ? "" : cellData;
if (type.Name.Contains("Int") || type.Name.Contains("Double") || type.Name.Contains("Decimal")) return string.Format("<Cell><Data ss:Type=\"Number\">{0}</Data></Cell>", data);
if (type.Name.Contains("Date") && data.ToString() != string.Empty)
{
return string.Format("<Cell ss:StyleID=\"s63\"><Data ss:Type=\"DateTime\">{0}</Data></Cell>", Convert.ToDateTime(data).ToString("yyyy-MM-dd"));
}
return string.Format("<Cell><Data ss:Type=\"String\">{0}</Data></Cell>", replaceXmlChar(data.ToString()));
}
private static string getWorksheets(DataSet source)
{
var sw = new StringWriter();
if (source == null || source.Tables.Count == 0)
{
sw.Write("<Worksheet ss:Name=\"Sheet1\">\r\n<Table>\r\n<Row><Cell><Data ss:Type=\"String\"></Data></Cell></Row>\r\n</Table>\r\n</Worksheet>");
return sw.ToString();
}
foreach (DataTable dt in source.Tables)
{
if (dt.Rows.Count == 0)
sw.Write("<Worksheet ss:Name=\"" + replaceXmlChar(dt.TableName) + "\">\r\n<Table>\r\n<Row><Cell ss:StyleID=\"s62\"><Data ss:Type=\"String\"></Data></Cell></Row>\r\n</Table>\r\n</Worksheet>");
else
{
//write each row data
var sheetCount = 0;
for (int i = 0; i < dt.Rows.Count; i++)
{
if ((i % rowLimit) == 0)
{
//add close tags for previous sheet of the same data table
if ((i / rowLimit) > sheetCount)
{
sw.Write("\r\n</Table>\r\n</Worksheet>");
sheetCount = (i / rowLimit);
}
sw.Write("\r\n<Worksheet ss:Name=\"" + replaceXmlChar(dt.TableName) +
(((i / rowLimit) == 0) ? "" : Convert.ToString(i / rowLimit)) + "\">\r\n<Table>");
//write column name row
sw.Write("\r\n<Row>");
foreach (DataColumn dc in dt.Columns)
sw.Write(string.Format("<Cell ss:StyleID=\"s62\"><Data ss:Type=\"String\">{0}</Data></Cell>", replaceXmlChar(dc.ColumnName)));
sw.Write("</Row>");
}
sw.Write("\r\n<Row>");
foreach (DataColumn dc in dt.Columns)
sw.Write(getCell(dc.DataType, dt.Rows[i][dc.ColumnName]));
sw.Write("</Row>");
}
sw.Write("\r\n</Table>\r\n</Worksheet>");
}
}
return sw.ToString();
}
public static string GetExcelXml(DataTable dtInput, string filename)
{
var excelTemplate = getWorkbookTemplate();
var ds = new DataSet();
ds.Tables.Add(dtInput.Copy());
var worksheets = getWorksheets(ds);
var excelXml = string.Format(excelTemplate, worksheets);
return excelXml;
}
public static string GetExcelXml(DataSet dsInput, string filename)
{
var excelTemplate = getWorkbookTemplate();
var worksheets = getWorksheets(dsInput);
var excelXml = string.Format(excelTemplate, worksheets);
return excelXml;
}
public static void ToExcel(DataSet dsInput, string filename, HttpResponse response)
{
var excelXml = GetExcelXml(dsInput, filename);
response.Clear();
response.AppendHeader("Content-Type", "application/vnd.ms-excel");
response.AppendHeader("Content-disposition", "attachment; filename=" + filename);
response.Write(excelXml);
response.Flush();
response.End();
}
public static void ToExcel(DataTable dtInput, string filename, HttpResponse response)
{
var ds = new DataSet();
ds.Tables.Add(dtInput.Copy());
ToExcel(ds, filename, response);
}
}
请参阅以下链接。
使用这种方式你可以用数据集创建一个xml ...如果你的数据很大......你可以使用response.write将每个xml字符串写入客户端，这样服务器上的内存使用量可以大大减少。
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