在内存中打开XMLstring作为Excel工作簿而不保存使用Windows Forms C＃

我有一个excelstring（我build立）在内存中; 代码看起来像这样：

public static void exportToExcel() { 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/>\r\n </Style>\r\n " + "<Style ss:ID=\"Integer\">\r\n <NumberFormat " + "ss:Format=\"0\"/>\r\n </Style>\r\n <Style " + "ss:ID=\"DateLiteral\">\r\n <NumberFormat " + "ss:Format=\"dd/mm/yyyy;@\"/>\r\n </Style>\r\n " + "</Styles>\r\n "; const string endExcelXML = "</Workbook>"; int sheetCount = 1; StringBuilder sb = new StringBuilder(); sb.Append(startExcelXML); sb.Append("<Worksheet ss:Name=\"Sheet" + sheetCount + "\">"); sb.Append("<Table>"); sb.Append("<Row>"); sb.Append("<Cell ss:StyleID=\"BoldColumn\"><Data ss:Type=\"String\">"); sb.Append("Home country"); sb.Append("</Data></Cell>"); sb.Append("<Cell ss:StyleID=\"BoldColumn\"><Data ss:Type=\"String\">"); sb.Append("Expatriation Type"); sb.Append("</Data></Cell>"); sb.Append("</Row>"); sb.Append("<Row>"); sb.Append("<Cell ss:StyleID=\"StringLiteral\">" + "<Data ss:Type=\"String\">"); sb.Append("Singapore"); sb.Append("</Data></Cell>"); sb.Append("<Cell ss:StyleID=\"StringLiteral\">" + "<Data ss:Type=\"String\">"); sb.Append("Benchmark"); sb.Append("</Data></Cell>"); sb.Append("</Row>"); sb.Append("</Table>"); sb.Append(" </Worksheet>"); sb.Append(endExcelXML); } 

我只能以物理方式保存文件，才能以Excel表打开文件; 但有没有其他的方式来打开内存中的Excelstring的XMLstring？

Answer 1

我认为你需要的是某种内存映射文件的实现。

但我相信，.NET 4.0将具有内置的MemoryMappedFile支持。

您可以使用search引擎查找其他.net实现。

Answer 2

我不确定，但大多数Microsoft自动化对象支持IPersist或IPersistStream ，它可以让你从内存中的stream加载。

像（伪代码）：

 xl = new Office.ExcelApplication; (xl as IPersistStream).Load(myMemoryStream); 

你可以使用shell帮助器函数CreateStreamOnHGlobal在一些内存中创build一个IStream包装器：

 functionCreateStreamOnMemory(pData: Pointer; nCount: DWORD): IStream; var hMem: HGLOBAL; dwError: DWORD; p: Pointer; begin hMem := GlobalAlloc(GMEM_MOVEABLE or GMEM_NODISCARD, nCount); //CreateStreamOnHGlobal says "The handle must be //allocated as movable and nondiscardable." if hMem = 0 then RaiseLastWin32Error; p := GlobalLock(hMem); if p = nil then begin dwError := GetLastError; GlobalFree(hMem); raise EWin32Error.Create('Could not lock global memory object: '+SysErrorMessage(dwError)); end; try CopyMemory(p, pData, nCount); finally GlobalUnlock(hMem); end; OleCheck(CreateStreamOnHGlobal(hMem, True, Result)); //Because we pass True, the stream will take care of freeing the HGLOBAL when the stream is released end; 

把你的string填在内存中，看看是否加载。