将Excel应用于报表开发中（一）--开始

[align=left]下面是一个简单的例子，打开一个定义好的Excel文件，这个文件是作为报表的模板，然后向模板的指定格子里填充数据，形成一个报表，在web方式下可以按照指定的命名方式在服务器上生成一个excel文件，之后传送到客户端，由客户端启动excel进行打印。[/align]
[align=left] [/align]
[align=left]Excel.Application m_objExcel = null;[/align]
[align=left]Excel._Workbook m_objBook = null;[/align]
[align=left]Excel.Sheets m_objSheets = null;[/align]
[align=left]Excel._Worksheet m_objSheet = null;[/align]
[align=left]Excel.Range m_objRange = null;[/align]
[align=left] [/align]
[align=left]object m_objOpt = System.Reflection.Missing.Value;[/align]
[align=left]try[/align]
[align=left]{[/align]
[align=left] m_objExcel = new Excel.Application();[/align]
[align=left]m_objBook = m_objExcel.Workbooks.Open("z://Book1.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);[/align]
[align=left] [/align]
[align=left] m_objSheets = (Excel.Sheets)m_objBook.Worksheets;[/align]
[align=left] m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1));[/align]
[align=left] [/align]
[align=left] [/align]
[align=left] string[] info = new string[5] { "Cure", "26", "dahuzizyd.cnblogs.com", "汉", "按时 ?放奥斯丁奥斯丁非是否奥斯丁非" };[/align]
[align=left] m_objRange = m_objSheet.get_Range("B1", m_objOpt);[/align]
[align=left] m_objRange.Value = info[0];[/align]
[align=left] m_objRange = m_objSheet.get_Range("E1", m_objOpt);[/align]
[align=left] m_objRange.Value = info[1];[/align]
[align=left] m_objRange = m_objSheet.get_Range("B2", m_objOpt);[/align]
[align=left] m_objRange.Value = info[2];[/align]
[align=left] m_objRange = m_objSheet.get_Range("E2", m_objOpt);[/align]
[align=left] m_objRange.Value = info[3];[/align]
[align=left] m_objRange = m_objSheet.get_Range("A3", m_objOpt);[/align]
[align=left] m_objRange.Value = info[4];[/align]
[align=left] [/align]
[align=left] m_objExcel.DisplayAlerts = false;[/align]
[align=left] [/align]
[align=left] m_objBook.SaveAs("z://Book2.xls", m_objOpt, m_objOpt,[/align]
[align=left] m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,[/align]
[align=left] m_objOpt, m_objOpt, m_objOpt, m_objOpt);[/align]
[align=left] [/align]
[align=left]}[/align]
[align=left]catch (Exception ex)[/align]
[align=left]{[/align]
[align=left] MessageBox.Show(ex.Message);[/align]
[align=left]}[/align]
[align=left]finally[/align]
[align=left]{[/align]
[align=left] m_objBook.Close(m_objOpt, m_objOpt, m_objOpt);[/align]
[align=left] m_objExcel.Workbooks.Close();[/align]
[align=left] m_objExcel.Quit();[/align]
[align=left] System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBook);[/align]
[align=left] System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objExcel);[/align]
[align=left] m_objBook = null;[/align]
[align=left] m_objExcel = null;[/align]
[align=left] GC.Collect();[/align]
}

可以看到，使用Excel要进行一部分的编码，好在这部分还不太复杂，但是最大的问题就在于当报表需求变更时，要重新编译部署，而且当格子特别多的时候，要这样硬编码还是挺痛苦的一件事。不过使用Excel毕竟给我们提供了一种选择，可以在开发时对多种方案权衡利弊，使用最适合项目的。