C#学习之操作excel表格

迷南。 2022-08-09 09:40 536阅读 0赞

# \-------------------自己的实践方案 #

今天开始学习C\#使用Excel。

首先，要先添加引用：

![Center][]

放大了看就是这个：

![Center 1][]

若发现没有这个项，可以默认安装office，我这里使用的是office2013：

![Center 2][]

若发现还是没有在引用中找到对应的项，可尝试添加VS的功能：关于office的功能组件。

# \-------------网上找到的资料 #

[\[C\# .Net\] Microsoft.Office.Interop.Excel 讀 / 寫 Excel 語法概全][C_ .Net_ Microsoft.Office.Interop.Excel _ _ _ Excel] 這篇當時是使用Excel2003所完成，距離現在2010的版本已經有點久遠了，版本不同寫法也有點不同，今天就來更新一下用法。

首先要先加入Excel.exe參考

[![image][]][image 1]

再來匯入 using Excel = Microsoft.Office.Interop.Excel;

[http://www.dotblogs.com.tw/yc421206/archive/2009/12/06/12297.aspx][http_www.dotblogs.com.tw_yc421206_archive_2009_12_06_12297.aspx]

再來瞭解一下我們會用到以下類別，這已經跟舊版的Excel名稱不同了。

Excel.Application：Excel應用程式

Excel.Workbook：應用程式裡的活頁簿，預設情況下，不管你開幾個Excel檔案，在工作管理員裡只會出現一個Excel.exe

Excel.Worksheet：活頁簿裡的工作表

Excel.Range：工作表裡的儲存格，一格也是Range，多格也是Range，用法Excel.Range\[“A1”\];

Excel.Range.Cells：這是儲存格的最小單位，代表一格的Range，用法Excel.Range.Cells\[1,1\];

[![image][image 2]][image_image 2]

[![image][image 3]][image_image 3]

接下來實作，initailExcel方法會檢查有無Excel.exe執行，若有則引用舊有Excel

Excel.Application _Excel = null;
    
     void initailExcel()
    {
        //檢查PC有無Excel在執行
        bool flag = false;
        foreach (var item in Process.GetProcesses())
        {
            if (item.ProcessName == "EXCEL")
            {
                flag = true;
                break;
            }
        }
    
        if (!flag)
        {
            this._Excel = new Excel.Application();
        }
        else
        {
            object obj = Marshal.GetActiveObject("Excel.Application");//引用已在執行的Excel
            _Excel = obj as Excel.Application;
        }
    
        this._Excel.Visible = true;//設false效能會比較好
    }
     
    ///------初始化Excel.Application在.NET裡沒有版本之分，但下列Method就有了
    ///-----@VS2010以前的版本VS2005 C#2.0~VS2008 C#3.0
    private void button1_Click(object sender, EventArgs e)
    {
        initailExcel();
        operExcel();
    }
    
    private void button2_Click(object sender, EventArgs e)
    {
        this._Excel.Quit();
        this._Excel = null;
        //確認已經沒有excel工作再回收
        GC.Collect();
    }
    
    void operExcel()
    {
        Excel.Workbook book = null;
        Excel.Worksheet sheet = null;
        Excel.Range range = null;
        string path = Application.StartupPath + "\\test.xlsx";
        try
        {
            book = _Excel.Workbooks.Open(path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);//開啟舊檔案
            sheet = (Excel.Worksheet)book.Sheets[1];
    
            range = sheet.get_Range("A5", "D23");
            foreach (Excel.Range item in range)
            {
                Console.WriteLine(item.Cells.Formula);
                Console.WriteLine(item.Cells.Value2);
                Console.WriteLine(item.Cells.Text);
            }
    
            book.Sheets.Add(Type.Missing, sheet, 1, Type.Missing);
            sheet = (Excel.Worksheet)book.Worksheets[2];
            sheet.Name = "新的工作表";
            //另存活頁簿
            book.SaveAs(Application.StartupPath + "\\test1.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
        }
        finally
        {
            book.Close(Type.Missing, Type.Missing, Type.Missing);
            book = null;
        }
    }

@VS2010 C\# 4.0 版本：因為C\# 4.0新增了選擇性參數，不在像舊版那樣必須強制代入無用的參數Type.Missing

另外：

在.NET4.0的專案中可以不必轉型

sheet = book.Sheets\["Sheet1"\];

在.NET2.0~3.5的專案中要轉型

sheet = (Excel.Worksheet)book.Sheets\["Sheet1"\];

private void button1_Click(object sender, EventArgs e)
    {
        initailExcel();
        operExcel();
    }
    
    private void button2_Click(object sender, EventArgs e)
    {
        this._Excel.Quit();
        this._Excel = null;
        //確認已經沒有excel工作再回收
        GC.Collect();
    }
    
    
    void operExcel()
    {
        Excel.Workbook book = null;
        Excel.Worksheet sheet = null;
        Excel.Range range = null;
        string path = Application.StartupPath + \\test.xlsx;
        try
        {
            book = _Excel.Workbooks.Open(path);//開啟舊檔案
            //sheet = (Excel.Worksheet)book.Sheets[1];//指定活頁簿,代表Sheet1 
            sheet = (Excel.Worksheet)book.Sheets["Sheet1"];//也可以直接指定工作表名稱 
    
            range = sheet.get_Range("A5", "D23");
            foreach (Excel.Range item in range)
            {
                Console.WriteLine(item.Cells.Formula);
                Console.WriteLine(item.Cells.Value);
                Console.WriteLine(item.Cells.Value2);
                Console.WriteLine(item.Cells.Text);
            }
    
            book.Sheets.Add(After: sheet, Count: 1);
            sheet = (Excel.Worksheet)book.Worksheets[2];
            sheet.Name = "新的工作表";
            //另存活頁簿
            book.SaveAs(Filename: Application.StartupPath + "\\test1.xls", FileFormat: Excel.XlFileFormat.xlXMLSpreadsheet, AccessMode: Excel.XlSaveAsAccessMode.xlNoChange);
        }
        finally
        {
            book.Close();
            book = null;
        }
    }

延伸閱讀

[http://www.dotblogs.com.tw/yc421206/archive/2008/12/20/6470.aspx][http_www.dotblogs.com.tw_yc421206_archive_2008_12_20_6470.aspx]

# \---------来自微软官方的文档信息 #

下面的代码示例演示如何使用 **COM interop** 创建 **Excel** 电子表格。有关 **Excel** 的更多信息，请参见[“Microsoft Excel Objects”（Microsoft Excel 对象）][Microsoft Excel Objects_Microsoft Excel]和[“Open Method”（Open 方法）][Microsoft Excel Objects_Microsoft Excel]

此示例演示如何在 C\# 中使用 .NET Framework **COM interop** 功能打开现有的 **Excel** 电子表格。使用 **Excel** 程序集来打开 **Excel** 电子表格中一定范围内的单元格并向其中输入数据。

<table style="margin-bottom:20px; margin-top:20px; border-top-width:1px; border-left-width:1px; border-style:solid none none solid; border-top-color:rgb(187,187,187); border-left-color:rgb(187,187,187); border-spacing:0px"> 
 <tbody> 
  <tr> 
   <th align="left" style="padding:10px 8px; color:rgb(99,99,99); border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187); font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; background-color:rgb(237,237,237)"> <img alt="Note" src="https://i-msdn.sec.s-msft.com/areas/global/content/clear.gif?v=635796165235010692" style="border:0px; width:10px; height:10px; overflow:hidden; padding-right:5px; max-width:none">注意</th> 
  </tr> 
  <tr> 
   <td style="font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; padding:10px 8px; color:rgb(42,42,42); vertical-align:top; border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187)"> <p style="margin-top:0px; margin-bottom:0px; padding-bottom:0px; line-height:18px"> 为使此代码正常运行，必须在系统中安装&nbsp;<strong>Excel</strong>。</p> </td> 
  </tr> 
 </tbody> 
</table>

<table style="margin-bottom:20px; margin-top:20px; border-top-width:1px; border-left-width:1px; border-style:solid none none solid; border-top-color:rgb(187,187,187); border-left-color:rgb(187,187,187); border-spacing:0px"> 
 <tbody> 
  <tr> 
   <th align="left" style="padding:10px 8px; color:rgb(99,99,99); border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187); font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; background-color:rgb(237,237,237)"> <img alt="Note" src="https://i-msdn.sec.s-msft.com/areas/global/content/clear.gif?v=635796165235010692" style="border:0px; width:10px; height:10px; overflow:hidden; padding-right:5px; max-width:none">注意</th> 
  </tr> 
  <tr> 
   <td style="font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; padding:10px 8px; color:rgb(42,42,42); vertical-align:top; border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187)"> <p style="margin-top:0px; margin-bottom:0px; padding-bottom:0px; line-height:18px"> 显示的对话框和菜单命令可能会与“帮助”中描述的不同，具体取决于您现用的设置或版本。若要更改设置，请在“工具”菜单上选择“导入和导出设置”。有关更多信息，请参见&nbsp;<a href="https://msdn.microsoft.com/zh-cn/library/zbhkx167%28v=vs.80%29.aspx" style="text-decoration:none; color:rgb(3,105,122)" rel="nofollow">Visual Studio 设置</a>。</p> </td> 
  </tr> 
 </tbody> 
</table>

使用 COM interop 创建 Excel 电子表格

1.  在 Visual Studio 中创建新的 C\# 控制台应用程序，将其命名为 **CreateExcelWorksheet**。
2.  将 Excel 程序集作为引用添加到项目中：右键单击项目，选择“添加引用”。
3.  单击“添加引用”对话框的“COM”选项卡，找到“Microsoft Excel 11 对象库”。
4.  双击“Microsoft Excel 11 对象库”，然后按“确定”。
    
    <table style="margin-bottom:20px; margin-top:20px; border-top-width:1px; border-left-width:1px; border-style:solid none none solid; border-top-color:rgb(187,187,187); border-left-color:rgb(187,187,187); border-spacing:0px"> 
     <tbody> 
      <tr> 
       <th align="left" style="padding:10px 8px; color:rgb(99,99,99); border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187); font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; background-color:rgb(237,237,237)"> <img alt="Note" src="https://i-msdn.sec.s-msft.com/areas/global/content/clear.gif?v=635796165235010692" style="border:0px; width:10px; height:10px; overflow:hidden; padding-right:5px; max-width:none">注意</th> 
      </tr> 
      <tr> 
       <td style="font-family:'Microsoft YaHei UI','Microsoft YaHei',SimSun,'Segoe UI','Lucida Grande',Verdana,Arial,Helvetica,sans-serif!important; padding:10px 8px; color:rgb(42,42,42); vertical-align:top; border-right-width:1px; border-bottom-width:1px; border-style:none solid solid none; border-right-color:rgb(187,187,187); border-bottom-color:rgb(187,187,187)"> <p style="margin-top:0px; margin-bottom:0px; padding-bottom:0px; line-height:18px"> 根据安装的 Office 版本的不同，Excel 程序集可能名为“Excel 10 对象库”或“Excel 11 对象库”。</p> </td> 
      </tr> 
     </tbody> 
    </table>
5.  复制下面的代码并将其粘贴到 Program.cs 文件中覆盖原有内容。

using System;
    using System.Reflection; 
    using Microsoft.Office.Interop.Excel;
    
    public class CreateExcelWorksheet
    {
        static void Main()
        {
            Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
    
            if (xlApp == null)
            {
                Console.WriteLine("EXCEL could not be started. Check that your office installation and project references are correct.");
                return;
            }
            xlApp.Visible = true;
    
            Workbook wb = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);
            Worksheet ws = (Worksheet)wb.Worksheets[1];
    
            if (ws == null)
            {
                Console.WriteLine("Worksheet could not be created. Check that your office installation and project references are correct.");
            }
    
            // Select the Excel cells, in the range c1 to c7 in the worksheet.
            Range aRange = ws.get_Range("C1", "C7");
    
            if (aRange == null)
            {
                Console.WriteLine("Could not get a range. Check to be sure you have the correct versions of the office DLLs.");
            }
    
            // Fill the cells in the C1 to C7 range of the worksheet with the number 6.
            Object[] args = new Object[1];
            args[0] = 6;
            aRange.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, aRange, args);
        
            // Change the cells in the C1 to C7 range of the worksheet to the number 8.
            aRange.Value2 = 8;
        }
    }

[Center]: /images/20220731/b6f0c24aeffc46dbb08d96fedf871792.png
[Center 1]: /images/20220731/0f27d156c7ee4bb9987cd9e9a8d344d4.png
[Center 2]: /images/20220731/ac52ef348a1440e8bc89b6935d64b297.png
[C_ .Net_ Microsoft.Office.Interop.Excel _ _ _ Excel]: http://www.dotblogs.com.tw/yc421206/archive/2009/01/11/6727.aspx
[image]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_thumb.png
[image 1]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_2.png
[http_www.dotblogs.com.tw_yc421206_archive_2009_12_06_12297.aspx]: http://www.dotblogs.com.tw/yc421206/archive/2009/12/06/12297.aspx
[image 2]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_thumb_3.png
[image_image 2]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_8.png
[image 3]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_thumb_1.png
[image_image 3]: http://files.dotblogs.com.tw/yc421206/1203/C-.Net-Microsoft.Off.Excel----Excel-2010_E15F/image_4.png
[http_www.dotblogs.com.tw_yc421206_archive_2008_12_20_6470.aspx]: http://www.dotblogs.com.tw/yc421206/archive/2008/12/20/6470.aspx
[Microsoft Excel Objects_Microsoft Excel]: https://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbaxl10/html/xlmthOpen.asp