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概述最常用于向 Excel 工作簿传输数据的技术是自动化。利用“自动化”,您可以调用特定于 Excel 任务的方法和属性。“自动化”给您提供了指定数据在工作簿中所处的位置、将工作簿格式化以及在运行时进行各种设置的最大的灵活性。
要在不使用“自动化”的情况下传输数据,您可以使用下列方法:
方法使用“自动化”逐个单元格地传输数据利用“自动化”,您可以逐个单元格地向工作表传输数据:
// Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Add data to cells in the first worksheet in the new workbook. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objRange.Value = "Last Name"; m_objRange = m_objSheet.get_Range("B1", m_objOpt); m_objRange.Value = "First Name"; m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange.Value = "Doe"; m_objRange = m_objSheet.get_Range("B2", m_objOpt); m_objRange.Value = "John"; // Apply bold to cells A1:B1. m_objRange = m_objSheet.get_Range("A1", "B1"); m_objFont = m_objRange.Font; m_objFont.Bold=true; // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book1.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 如果您具有少量的数据,则逐个单元格地传输数据是可以接受的方法。您可以灵活地将数据放到工作簿中的任何地方,并可以在运行时根据条件对单元格进行格式设置。然而,如果您具有大量需要传输到 Excel 工作簿的数据,则使用这种方法不是一个好主意。您在运行时获取的每一个 Range 对象都会产生一个接口请求,这意味着数据传输速度会变得较慢。此外,Microsoft Windows 95、Microsoft Windows 98 以及 Microsoft Windows Millennium Edition (Me) 都对接口请求有 64 KB 的限制。如果您具有 64 KB 以上的接口请求,则“自动化”服务器 (Excel) 可能会停止响应,或者您可能会收到指出内存不足的错误信息。有关其他信息,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章: // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Add data to cells in the first worksheet in the new workbook. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objRange.Value = "Last Name"; m_objRange = m_objSheet.get_Range("B1", m_objOpt); m_objRange.Value = "First Name"; m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange.Value = "Doe"; m_objRange = m_objSheet.get_Range("B2", m_objOpt); m_objRange.Value = "John"; // Apply bold to cells A1:B1. m_objRange = m_objSheet.get_Range("A1", "B1"); m_objFont = m_objRange.Font; m_objFont.Bold=true; // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book1.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 如果您具有少量的数据,则逐个单元格地传输数据是可以接受的方法。您可以灵活地将数据放到工作簿中的任何地方,并可以在运行时根据条件对单元格进行格式设置。然而,如果您具有大量需要传输到 Excel 工作簿的数据,则使用这种方法不是一个好主意。您在运行时获取的每一个 Range 对象都会产生一个接口请求,这意味着数据传输速度会变得较慢。此外,Microsoft Windows 95、Microsoft Windows 98 以及 Microsoft Windows Millennium Edition (Me) 都对接口请求有 64 KB 的限制。如果您具有 64 KB 以上的接口请求,则“自动化”服务器 (Excel) 可能会停止响应,或者您可能会收到指出内存不足的错误信息。有关其他信息,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章:
216400 (http://support.microsoft.com/kb/216400/EN-US/) PRB:Cross-Process COM Automation Can Hang Client Application on Win95/98
需要再次强调的是,逐个单元格地传输数据仅对少量数据而言才可以接受。如果您必须向 Excel 传输大数据集,则应考虑使用本文中讨论的其他方法之一来批量地传输数据。
302084 (http://support.microsoft.com/kb/302084/EN-US/) HOWTO:在 Microsoft Visual C# .NET 中使 Microsoft Excel 自动运行
使用“自动化”将数据数组传输到工作表上的区域可以将数据数组一次性地传输到由多个单元格组成的区域:
// Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); // Create an array for the headers and add it to cells A1:C1. object[] objHeaders = {"Order ID", "Amount", "Tax"}; m_objRange = m_objSheet.get_Range("A1", "C1"); m_objRange.Value = objHeaders; m_objFont = m_objRange.Font; m_objFont.Bold=true; // Create an array with 3 columns and 100 rows and add it to // the worksheet starting at cell A2. object[,] objData = new Object[100,3]; Random rdm = new Random((int)DateTime.Now.Ticks); double nOrderAmt, nTax; for(int r=0;r<100;r++) { objData[r,0] = "ORD" + r.ToString("0000"); nOrderAmt = rdm.Next(1000); objData[r,1] = nOrderAmt.ToString("c"); nTax = nOrderAmt*0.07; objData[r,2] = nTax.ToString("c"); } m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange = m_objRange.get_Resize(100,3); m_objRange.Value = objData; // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book2.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 如果您使用数组而不是逐个单元格地传输数据,则在传输大量数据时,传输性能会大大地增强。请考虑前面代码中的下列几行,这些行将数据传输到工作表中的 300 个单元格:
objRange = objSheet.get_Range("A2", m_objOpt); objRange = objRange.get_Resize(100,3); objRange.Value = objData; 这些代码代表了两个接口请求:一个请求是针对 Range 方法返回的 Range 对象,另一个请求是针对 Resize 方法返回的 Range 对象。相比之下,逐个单元格地传输数据却需要对 Range 对象发出 300 个接口请求。只要有可能,您就可以从批量地传输数据以及减少所发出的接口请求的数量当中受益。 // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); // Create an array for the headers and add it to cells A1:C1. object[] objHeaders = {"Order ID", "Amount", "Tax"}; m_objRange = m_objSheet.get_Range("A1", "C1"); m_objRange.Value = objHeaders; m_objFont = m_objRange.Font; m_objFont.Bold=true; // Create an array with 3 columns and 100 rows and add it to // the worksheet starting at cell A2. object[,] objData = new Object[100,3]; Random rdm = new Random((int)DateTime.Now.Ticks); double nOrderAmt, nTax; for(int r=0;r<100;r++) { objData[r,0] = "ORD" + r.ToString("0000"); nOrderAmt = rdm.Next(1000); objData[r,1] = nOrderAmt.ToString("c"); nTax = nOrderAmt*0.07; objData[r,2] = nTax.ToString("c"); } m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange = m_objRange.get_Resize(100,3); m_objRange.Value = objData; // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book2.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 如果您使用数组而不是逐个单元格地传输数据,则在传输大量数据时,传输性能会大大地增强。请考虑前面代码中的下列几行,这些行将数据传输到工作表中的 300 个单元格:
objRange = objSheet.get_Range("A2", m_objOpt); objRange = objRange.get_Resize(100,3); objRange.Value = objData; 这些代码代表了两个接口请求:一个请求是针对 Range 方法返回的 Range 对象,另一个请求是针对 Resize 方法返回的 Range 对象。相比之下,逐个单元格地传输数据却需要对 Range 对象发出 300 个接口请求。只要有可能,您就可以从批量地传输数据以及减少所发出的接口请求的数量当中受益。 objRange = objSheet.get_Range("A2", m_objOpt); objRange = objRange.get_Resize(100,3); objRange.Value = objData; 这些代码代表了两个接口请求:一个请求是针对 Range 方法返回的 Range 对象,另一个请求是针对 Resize 方法返回的 Range 对象。相比之下,逐个单元格地传输数据却需要对 Range 对象发出 300 个接口请求。只要有可能,您就可以从批量地传输数据以及减少所发出的接口请求的数量当中受益。
302096 (http://support.microsoft.com/kb/302096/EN-US/) HOWTO:在 Visual C# .NET 中使 Excel 自动运行以使用数组填充或获取某个区域中的数据
使用“自动化”将 ADO 记录集传输到工作表区域Excel 2000、Excel 2002 和 Excel 2003 的对象模型提供了 CopyFromRecordset 方法,用于向工作表上的区域传输 ADO 记录集。下面的代码说明了如何使用 CopyFromRecordset 方法使 Excel 自动运行,以传输 Northwind 示例数据库中的“订单”表的内容:
// Create a Recordset from all the records in the Orders table. ADODB.Connection objConn = new ADODB.Connection(); ADODB._Recordset objRS = null; objConn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";", "", "", 0); objConn.CursorLocation = ADODB.CursorLocationEnum.adUseClient; object objRecAff; objRS = (ADODB._Recordset)objConn.Execute("Orders", out objRecAff, (int)ADODB.CommandTypeEnum.adCmdTable); // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); // Get the Fields collection from the recordset and determine // the number of fields (or columns). System.Collections.IEnumerator objFields = objRS.Fields.GetEnumerator(); int nFields = objRS.Fields.Count; // Create an array for the headers and add it to the // worksheet starting at cell A1. object[] objHeaders = new object[nFields]; ADODB.Field objField = null; for(int n=0;n<nFields;n++) { objFields.MoveNext(); objField = (ADODB.Field)objFields.Current; objHeaders[n] = objField.Name; } m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objRange = m_objRange.get_Resize(1, nFields); m_objRange.Value = objHeaders; m_objFont = m_objRange.Font; m_objFont.Bold=true; // Transfer the recordset to the worksheet starting at cell A2. m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange.CopyFromRecordset(objRS, m_objOpt, m_objOpt); // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book3.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Close the recordset and connection. objRS.Close(); objConn.Close(); 注意:CopyFromRecordset 只能与 ADO Recordset 对象一起使用。使用 ADO.NET 创建的 DataSet 不能与 CopyFromRecordset 方法一起使用。以下几部分中的多个示例演示了如何利用 ADO.NET 向 Excel 传输数据。 // Create a Recordset from all the records in the Orders table. ADODB.Connection objConn = new ADODB.Connection(); ADODB._Recordset objRS = null; objConn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";", "", "", 0); objConn.CursorLocation = ADODB.CursorLocationEnum.adUseClient; object objRecAff; objRS = (ADODB._Recordset)objConn.Execute("Orders", out objRecAff, (int)ADODB.CommandTypeEnum.adCmdTable); // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); // Get the Fields collection from the recordset and determine // the number of fields (or columns). System.Collections.IEnumerator objFields = objRS.Fields.GetEnumerator(); int nFields = objRS.Fields.Count; // Create an array for the headers and add it to the // worksheet starting at cell A1. object[] objHeaders = new object[nFields]; ADODB.Field objField = null; for(int n=0;n<nFields;n++) { objFields.MoveNext(); objField = (ADODB.Field)objFields.Current; objHeaders[n] = objField.Name; } m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objRange = m_objRange.get_Resize(1, nFields); m_objRange.Value = objHeaders; m_objFont = m_objRange.Font; m_objFont.Bold=true; // Transfer the recordset to the worksheet starting at cell A2. m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange.CopyFromRecordset(objRS, m_objOpt, m_objOpt); // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book3.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Close the recordset and connection. objRS.Close(); objConn.Close(); 注意:CopyFromRecordset 只能与 ADO Recordset 对象一起使用。使用 ADO.NET 创建的 DataSet 不能与 CopyFromRecordset 方法一起使用。以下几部分中的多个示例演示了如何利用 ADO.NET 向 Excel 传输数据。 使用“自动化”在工作表上创建 QueryTable 对象QueryTable 对象代表了一个表,该表是用从外部数据源返回的数据生成的。当您自动运行 Excel 时,可以通过提供指向 OLE DB 或 ODBC 数据源的连接字符串和 SQL 字符串来创建 QueryTable。Excel 将生成记录集并将该记录集插入到工作表中您所指定的位置。QueryTable 对象提供了下列优于 CopyFromRecordset 方法的优点:
// Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Create a QueryTable that starts at cell A1. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objQryTables = m_objSheet.QueryTables; m_objQryTable = (Excel._QueryTable)m_objQryTables.Add( "OLEDB;Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";", m_objRange, "Select * From Orders"); m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows; m_objQryTable.Refresh(false); // Save the workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book4.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Create a QueryTable that starts at cell A1. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objQryTables = m_objSheet.QueryTables; m_objQryTable = (Excel._QueryTable)m_objQryTables.Add( "OLEDB;Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";", m_objRange, "Select * From Orders"); m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows; m_objQryTable.Refresh(false); // Save the workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book4.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 使用 Windows 剪贴板可以使用 Windows 剪贴板来向工作表传输数据。要将数据粘贴到工作表上的多个单元格中,可以复制具有以下格式的字符串:在该字符串中,列由制表符分隔,行由回车符分隔。下面的代码说明了 Visual C# .NET 如何使用 Windows 剪贴板来向 Excel 中传输数据:
// Copy a string to the Windows clipboard. string sData = "FirstName\tLastName\tBirthdate\r\n" + "Bill\tBrown\t2/5/85\r\n" + "Joe\tThomas\t1/1/91"; System.Windows.Forms.Clipboard.SetDataObject(sData); // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Paste the data starting at cell A1. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objSheet.Paste(m_objRange, false); // Save the workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book5.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Copy a string to the Windows clipboard. string sData = "FirstName\tLastName\tBirthdate\r\n" + "Bill\tBrown\t2/5/85\r\n" + "Joe\tThomas\t1/1/91"; System.Windows.Forms.Clipboard.SetDataObject(sData); // Start a new workbook in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); // Paste the data starting at cell A1. m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); m_objRange = m_objSheet.get_Range("A1", m_objOpt); m_objSheet.Paste(m_objRange, false); // Save the workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book5.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 创建可由 Excel 分析为行和列的带分隔符的文本文件Excel 可以打开由制表符或逗号分隔的文件并正确地将数据分析为单元格。当您希望向工作表传输大量数据而只使用少量(如果有的话)自动化功能时,可以使用此功能。这对于客户端-服务器程序而言可能是一个好方法,因为文本文件可以在服务器端生成。然后,可以在客户端根据需要使用“自动化”来打开文本文件。
// Connect to the data source. System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";"); objConn.Open(); // Execute a command to retrieve all records from the Employees table. System.Data.OleDb.OleDbCommand objCmd = new System.Data.OleDb.OleDbCommand( "Select * From Employees", objConn); System.Data.OleDb.OleDbDataReader objReader; objReader = objCmd.ExecuteReader(); // Create the FileStream and StreamWriter object to write // the recordset contents to file. System.IO.FileStream fs = new System.IO.FileStream( m_strSampleFolder + "Book6.txt", System.IO.FileMode.Create); System.IO.StreamWriter sw = new System.IO.StreamWriter( fs, System.Text.Encoding.Unicode); // Write the field names (headers) as the first line in the text file. sw.WriteLine(objReader.GetName(0) + "\t" + objReader.GetName(1) + "\t" + objReader.GetName(2) + "\t" + objReader.GetName(3) + "\t" + objReader.GetName(4) + "\t" + objReader.GetName(5)); // Write the first six columns in the recordset to a text file as // tab-delimited. while(objReader.Read()) { for(int i=0;i<=5;i++) { if(!objReader.IsDBNull(i)) { string s; s = objReader.GetDataTypeName(i); if(objReader.GetDataTypeName(i)=="DBTYPE_I4") { sw.Write(objReader.GetInt32(i).ToString()); } else if(objReader.GetDataTypeName(i)=="DBTYPE_DATE") { sw.Write(objReader.GetDateTime(i).ToString("d")); } else if (objReader.GetDataTypeName(i)=="DBTYPE_WVARCHAR") { sw.Write(objReader.GetString(i)); } } if(i<5) sw.Write("\t"); } sw.WriteLine(); } sw.Flush(); // Write the buffered data to the filestream. // Close the FileStream. fs.Close(); // Close the reader and the connection. objReader.Close(); objConn.Close(); 上述代码没有使用自动化。然而,如果您愿意,您可以按如下方式使用“自动化”来打开文本文件,并以 Excel 工作簿格式保存该文件:
// Open the text file in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBooks.OpenText(m_strSampleFolder + "Book6.txt", Excel.XlPlatform.xlWindows, 1, Excel.XlTextParsingType.xlDelimited, Excel.XlTextQualifier.xlTextQualifierDoubleQuote, false, true, false, false, false, false, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook = m_objExcel.ActiveWorkbook; // Save the text file in the typical workbook format and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book6.xls", Excel.XlFileFormat.xlWorkbookNormal, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Connect to the data source. System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strNorthwind + ";"); objConn.Open(); // Execute a command to retrieve all records from the Employees table. System.Data.OleDb.OleDbCommand objCmd = new System.Data.OleDb.OleDbCommand( "Select * From Employees", objConn); System.Data.OleDb.OleDbDataReader objReader; objReader = objCmd.ExecuteReader(); // Create the FileStream and StreamWriter object to write // the recordset contents to file. System.IO.FileStream fs = new System.IO.FileStream( m_strSampleFolder + "Book6.txt", System.IO.FileMode.Create); System.IO.StreamWriter sw = new System.IO.StreamWriter( fs, System.Text.Encoding.Unicode); // Write the field names (headers) as the first line in the text file. sw.WriteLine(objReader.GetName(0) + "\t" + objReader.GetName(1) + "\t" + objReader.GetName(2) + "\t" + objReader.GetName(3) + "\t" + objReader.GetName(4) + "\t" + objReader.GetName(5)); // Write the first six columns in the recordset to a text file as // tab-delimited. while(objReader.Read()) { for(int i=0;i<=5;i++) { if(!objReader.IsDBNull(i)) { string s; s = objReader.GetDataTypeName(i); if(objReader.GetDataTypeName(i)=="DBTYPE_I4") { sw.Write(objReader.GetInt32(i).ToString()); } else if(objReader.GetDataTypeName(i)=="DBTYPE_DATE") { sw.Write(objReader.GetDateTime(i).ToString("d")); } else if (objReader.GetDataTypeName(i)=="DBTYPE_WVARCHAR") { sw.Write(objReader.GetString(i)); } } if(i<5) sw.Write("\t"); } sw.WriteLine(); } sw.Flush(); // Write the buffered data to the filestream. // Close the FileStream. fs.Close(); // Close the reader and the connection. objReader.Close(); objConn.Close(); 上述代码没有使用自动化。然而,如果您愿意,您可以按如下方式使用“自动化”来打开文本文件,并以 Excel 工作簿格式保存该文件:
// Open the text file in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBooks.OpenText(m_strSampleFolder + "Book6.txt", Excel.XlPlatform.xlWindows, 1, Excel.XlTextParsingType.xlDelimited, Excel.XlTextQualifier.xlTextQualifierDoubleQuote, false, true, false, false, false, false, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook = m_objExcel.ActiveWorkbook; // Save the text file in the typical workbook format and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book6.xls", Excel.XlFileFormat.xlWorkbookNormal, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); // Open the text file in Excel. m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBooks.OpenText(m_strSampleFolder + "Book6.txt", Excel.XlPlatform.xlWindows, 1, Excel.XlTextParsingType.xlDelimited, Excel.XlTextQualifier.xlTextQualifierDoubleQuote, false, true, false, false, false, false, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook = m_objExcel.ActiveWorkbook; // Save the text file in the typical workbook format and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book6.xls", Excel.XlFileFormat.xlWorkbookNormal, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); 使用 ADO.NET 将数据传输到工作表您可以使用 Microsoft Jet OLE DB 提供程序向现有 Excel 工作簿中的表中添加记录。Excel 中的表 只是由单元格组成的区域;该区域可能具有规定的名称。通常,区域的第一行包含标题(或字段名),该区域中所有以后的行都包含记录。
// Establish a connection to the data source. System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strSampleFolder + "Book7.xls;Extended Properties=Excel 8.0;"); objConn.Open(); // Add two records to the table named 'MyTable'. System.Data.OleDb.OleDbCommand objCmd = new System.Data.OleDb.OleDbCommand(); objCmd.Connection = objConn; objCmd.CommandText = "Insert into MyTable (FirstName, LastName)" + " values ('Bill', 'Brown')"; objCmd.ExecuteNonQuery(); objCmd.CommandText = "Insert into MyTable (FirstName, LastName)" + " values ('Joe', 'Thomas')"; objCmd.ExecuteNonQuery(); // Close the connection. objConn.Close(); 当您按本例所示的方法利用 ADO.NET 添加记录时,工作簿中的格式将被保持。添加到行中的每个记录都将继承它前面的行的格式。 // Establish a connection to the data source. System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_strSampleFolder + "Book7.xls;Extended Properties=Excel 8.0;"); objConn.Open(); // Add two records to the table named 'MyTable'. System.Data.OleDb.OleDbCommand objCmd = new System.Data.OleDb.OleDbCommand(); objCmd.Connection = objConn; objCmd.CommandText = "Insert into MyTable (FirstName, LastName)" + " values ('Bill', 'Brown')"; objCmd.ExecuteNonQuery(); objCmd.CommandText = "Insert into MyTable (FirstName, LastName)" + " values ('Joe', 'Thomas')"; objCmd.ExecuteNonQuery(); // Close the connection. objConn.Close(); 当您按本例所示的方法利用 ADO.NET 添加记录时,工作簿中的格式将被保持。添加到行中的每个记录都将继承它前面的行的格式。
306636 (http://support.microsoft.com/kb/306636/EN-US/) HOW TO:使用 ADO.NET 和 Visual C# .NET 连接到数据库并运行命令
314145 (http://support.microsoft.com/kb/314145/EN-US/) HOW TO:使用 Visual C# .NET 从数据库填充 DataSet 对象
307587 (http://support.microsoft.com/kb/307587/EN-US/) HOW TO: 使用 Visual C# .NET 从数据集对象更新数据库
有关如何将 Jet OLEDB 提供程序与 Excel 数据源一起使用的其他信息,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章。
316934 (http://support.microsoft.com/kb/316934/EN-US/) HOW TO:在 Visual Basic .NET 中使用 ADO.NET 检索和修改 Excel 工作簿中的记录
278973 (http://support.microsoft.com/kb/278973/EN-US/) SAMPLE: ExcelADO Demonstrates How to Use ADO to Read and Write Data in Excel Workbooks
257819 (http://support.microsoft.com/kb/257819/EN-US/) HOWTO:在 Visual Basic 或 VBA 中使用 ADO 来处理 Excel 数据
传输 XML 数据(Excel 2002 和 Excel 2003)Excel 2002 和 2003 可以打开格式完好的任何 XML 文件。您可以使用文件菜单上的打开命令直接打开 XML 文件,也可以使用 Workbooks 集合的 Open 或 OpenXML 方法以编程方式打开 XML 文件。如果您创建供在 Excel 中使用的 XML 文件,您还可以创建样式表来设置数据的格式。
307029 (http://support.microsoft.com/kb/307029/EN-US/) HOW TO:使用 Visual C# .NET 向 Microsoft Excel 2002 传输 XML 数据
288215 (http://support.microsoft.com/kb/288215/EN-US/) INFO: Microsoft Excel 2002 and XML
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