自(http://www.cnblogs.com/Wiseman/archive/2004/11/26/69113.html)
HOW TO:使用 Visual C# .NET 向 Excel 工作簿传输数据本任务的内容
概要
概述
利用“自动化”,您可以使用多种技术来传输数据:
• | 逐个单元格地传输数据 |
• | 将数组中的数据传输到由单元格组成的区域。 |
• | 使用 CopyFromRecordset 方法向单元格区域传输 ADO 记录集中的数据。 |
• | 在 Excel 工作表上创建一个 QueryTable 对象,该对象包含对 ODBC 或 OLEDB 数据源进行查询的结果。 |
• | 将数据传输到剪贴板,然后将剪贴板内容粘贴到 Excel 工作表中。 |
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:
• | 将数据传输到制表符分隔的或逗号分隔的文本文件,然后 Excel 可以将该文本文件分析为工作表上的单元格。 |
• | 使用 ADO.NET 将数据传输到工作表。 |
• | 将 XML 数据传输到 Excel(仅限于 2002 和 2003 版)以提供可以被格式化和排列为行和列的数据。 |
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方法
使用“自动化”逐个单元格地传输数据
// 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();
有关其他信息以及如何利用 Visual C# .NET 自动运行 Excel 的示例,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章:
使用“自动化”将数据数组传输到工作表上的区域
// 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();
objRange = objSheet.get_Range("A2", m_objOpt); objRange = objRange.get_Resize(100,3); objRange.Value = objData;
有关通过 Excel 自动化并使用数组获取和设置区域中的值的其他信息,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章:
使用“自动化”将 ADO 记录集传输到工作表区域
// 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();
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使用“自动化”在工作表上创建 QueryTable 对象
• | Excel 处理记录集的创建并将其放置到工作表中。 |
• | 您可以利用 QueryTable 对象保存查询,并在以后刷新它以获取更新的记录集。 |
• | 当向工作表中添加新的 QueryTable 时,可以指定将工作表上的单元格中已经存在的数据移位,以处理新数据(有关详细信息,请查看 RefreshStyle 属性)。 |
// 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
// 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);
//这是我加的,否则真正在处理大量数据时,objSheet.Paste会引发异常HRESULT:0x800A03EC,原因是上面的Clipboard.SetDataObject的工作还没完成
int wait =50+ data.Length / 1000;
Thread.Sleep(wait);
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(); 返回页首
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。
下面的代码说明了如何从利用 ADO.NET 读取的数据生成制表符分隔的文本文件:
// 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();
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。
下面的代码向 Book7.xls 中的表添加了两个新记录。在此情况下,该表是 Sheet1:
// 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。
有关使用 ADO.NET 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:
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。
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。
有关如何将 XML 与 Excel 2002 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:
创建完整的示例 Visual C# .NET 项目
1. | 创建一个名为 C:\ExcelData 的新文件夹。示例程序将在此文件夹中存储 Excel 工作簿。 | ||||||||||||
2. | 创建一个新工作簿,以供示例向其中写入数据:
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3. | 启动 Visual Studio .NET。在文件菜单上,指向新建,然后单击项目。在 Visual C# 项目下,选择 Windows 应用程序。默认情况下会创建 Form1。 | ||||||||||||
4. | 添加对 Excel 对象库和 ADODB 主 interop 程序集的引用。为此,请按照下列步骤操作:
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5. | 向 Form1 添加一个 Combo Box 控件和一个 Button 控件。 | ||||||||||||
6. | 为该窗体的 Load 事件和 Button 控件的 Click事件添加事件处理程序:
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7. | 在 Form1.cs 中,将以下代码:
private void Form1_Load(object sender, System.EventArgs e) { } private void button1_Click(object sender, System.EventArgs e) { }替换为: // Excel object references. private Excel.Application m_objExcel = null; private Excel.Workbooks m_objBooks = null; private Excel._Workbook m_objBook = null; private Excel.Sheets m_objSheets = null; private Excel._Worksheet m_objSheet = null; private Excel.Range m_objRange = null; private Excel.Font m_objFont = null; private Excel.QueryTables m_objQryTables = null; private Excel._QueryTable m_objQryTable = null; // Frequenty-used variable for optional arguments. private object m_objOpt = System.Reflection.Missing.Value; // Paths used by the sample code for accessing and storing data. private object m_strSampleFolder = "C:\\ExcelData\\"; private string m_strNorthwind = "C:\\Program Files\\Microsoft Office\\Office10\\Samples\\Northwind.mdb"; private void Form1_Load(object sender, System.EventArgs e) { comboBox1.DropDownStyle = ComboBoxStyle.DropDownList; comboBox1.Items.AddRange(new object[]{ "Use Automation to Transfer Data Cell by Cell ", "Use Automation to Transfer an Array of Data to a Range on a Worksheet ", "Use Automation to Transfer an ADO Recordset to a Worksheet Range ", "Use Automation to Create a QueryTable on a Worksheet", "Use the Clipboard", "Create a Delimited Text File that Excel Can Parse into Rows and Columns", "Transfer Data to a Worksheet Using ADO.NET "}); comboBox1.SelectedIndex = 0; button1.Text = "Go!"; } private void button1_Click(object sender, System.EventArgs e) { switch (comboBox1.SelectedIndex) { case 0 : Automation_CellByCell(); break; case 1 : Automation_UseArray(); break; case 2 : Automation_ADORecordset(); break; case 3 : Automation_QueryTable(); break; case 4 : Use_Clipboard(); break; case 5 : Create_TextFile(); break; case 6 : Use_ADONET(); break; } //Clean-up m_objFont = null; m_objRange = null; m_objSheet = null; m_objSheets = null; m_objBooks = null; m_objBook = null; m_objExcel = null; GC.Collect(); } private void Automation_CellByCell() { // 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 of 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.set_Value(m_objOpt,"Last Name"); m_objRange = m_objSheet.get_Range("B1", m_objOpt); m_objRange.set_Value(m_objOpt,"First Name"); m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange.set_Value(m_objOpt,"Doe"); m_objRange = m_objSheet.get_Range("B2", m_objOpt); m_objRange.set_Value(m_objOpt,"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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); } private void Automation_UseArray() { // 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.set_Value(m_objOpt,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.set_Value(m_objOpt,"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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); } private void Automation_ADORecordset() { // 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.set_Value(m_objOpt,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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); //Close the recordset and connection objRS.Close(); objConn.Close(); } private void Automation_QueryTable() { // 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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); } private void Use_Clipboard() { // Copy a string to the 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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); } private void Create_TextFile() { // 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(); // ================================================================== // Optionally, automate Excel to open the text file and save it in the // Excel workbook format. // 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_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_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit(); } private void Use_ADONET() { // 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(); } } // End Class }// End namespace注意:如果您没有将 Office 安装到默认文件夹(C:\Program Files\Microsoft Office),请修改代码示例中的 m_strNorthwind 常数以匹配 Northwind.mdb 的安装路径。 |
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8. | 将下面的代码添加到 Form1.cs 中的 Using指令中:
using System.Reflection; using System.Runtime.InteropServices; using Excel = Microsoft.Office.Interop.Excel; |
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9. | 按 F5 生成并运行该示例。 |
【#注:一、以上的很多方法都只能在从本地数据库导到Excel,或者要求客服端进行复杂的设置,这对远程服务器都不合适;