C#多种操作excel的方法比较-C#/.NET开发

本文详细讲解了C#多种操作excel的方法，文中通过示例代码介绍的非常详细。对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下

我们在做excel资料的时候，通常有以下方法。

一.导入导出excel常用方法：

1.用查询表的方式查询并show在数据集控件上。


public static string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =C:\\08.xls;Extended Properties=Excel 8.0";
    public static DataSet ds;
    protected void Page_Load(object sender, EventArgs e)
    {
        
        OleDbConnection conn = new OleDbConnection(strCon);
        string sql = "select * from [Sheet1$]";
        conn.Open();
        OleDbDataAdapter myCommand = new OleDbDataAdapter(sql, strCon);
        ds = new DataSet();
        myCommand.Fill(ds, "[Sheet1$]");
        conn.Close();
        datagrid1.DataMember = "[Sheet1$]";
        datagrid1.DataSource = ds;
        datagrid1.DataBind();


        //Excel.Application excel = new Excel.Application();
        //excel.Application.Workbooks.Add(true);
        //excel.Visible = true;
    }

2.一个一个单元格的进行插入


         string str = @"Data Source=IT-428E4EA4B0C7\SQLEXPRESS;Initial Catalog=TestBase;Integrated Security=True";
         SqlConnection conn = new SqlConnection(str);
         conn.Open();
         int n = 0;
         for (int i = 1; i < 20; i++)
         {
             if (n > 3)
                 break;
             else
                 if (msheet.Cells.get_Range("A" + i, Type.Missing).Text.ToString() == "" && n <= 3)
                 { n++; }
                 else
                 {
  //循环获取excel单元格的值一次一次的插入，excuteSql为执行的存储过程
                      excuteSql(msheet.Cells.get_Range("B" + i, Type.Missing).Text.ToString(),
                        msheet.Cells.get_Range("B" + (i + 1), Type.Missing).Text.ToString(),
                        msheet.Cells.get_Range("B" + (i + 2), Type.Missing).Text.ToString(),
                         conn);
                     i = i + 3;
 
                 }
         }
 
         conn.Close();

二快速导入导出

1.我们都知道当向db里批量插入数据的时候我们会选择SqlBulkCopy


if (dataTable!=null && dataTable.Rows.Count!=0)

            {

                sqlBulkCopy.WriteToServer(dataTable);

            }

这个可以看深山老林新发的一篇SQLServer中批量插入数据方式的性能对比

下面是SqlBulkCopy的方法，这个方法有一个弊端就是当excel某一列即有文字，还有日期的时候，会出现null值，我在网上查了一些资料说连接字串加上;HDR=YES;IMEX=1'的时候会都当做字符处理，但是还是会出现一些bug，所以建议最好先把excel数据分析到datatable里然后再用SqlBulkCopy倒入数据库


 // block copy to DB from Excel
         //By xijun, 
         //step create an excel file  C:\Inetpub\wwwroot\test.xls , fill cell(1,1) with "Data",cell(1,2) with "name"
         //step create table named "Data" with column ("data","name") in your DB
         //there the code below:
         DateTime t1 = DateTime.Now;
         Response.Write("<br>start time:" + t1.ToString());
         string ExcelFile = @"C:\\_Hub_Report.xls";
         string excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFile + ";Extended Properties='Excel.0;HDR=YES;IMEX=1'";
 
         using (OleDbConnection excelConnection = new OleDbConnection(excelConnectionString))
         {
 
             excelConnection.Open();
             //Getting source data
             //非空讀入數據
             OleDbCommand command = new OleDbCommand("Select [Region],[CustomerPN],[RMA],[Date],[QTY],[Return/Pull] FROM [_Hub_Report$]  ", excelConnection);
             // Initialize SqlBulkCopy object
 
             using (OleDbDataReader dr = command.ExecuteReader())
             {
                 // Copy data to destination
                 string sqlConnectionString = @"Data Source=MININT-GPHNA\SQLEXPRESS;Initial Catalog=GDS_Service;Integrated Security=True";
                 using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
                 {
                     bulkCopy.DestinationTableName = "GDS_Hub_data";
                     //加入只加入一個列的話,那么就會其他數據庫列都默認為空。
                     bulkCopy.ColumnMappings.Add("Region", "region");
                     bulkCopy.ColumnMappings.Add("CustomerPN", "customer_item_number");
                     bulkCopy.ColumnMappings.Add("RMA", "Rma");
                     bulkCopy.ColumnMappings.Add("Date", "date");
                     bulkCopy.ColumnMappings.Add("QTY", "Qty_1");
                     bulkCopy.ColumnMappings.Add("Return/Pull", "return_pull");
                     //bcp.BatchSize =;//每次传输的行数
                     //bcp.NotifyAfter =;//进度提示的行数
                     bulkCopy.BatchSize =;
                     bulkCopy.NotifyAfter =;
                     bulkCopy.WriteToServer((IDataReader)dr);
                     
 
                 }
             }
             //Closing connection
             excelConnection.Close();
         }
 
         DateTime t2 = DateTime.Now;
         Response.Write("<br>End time:" + t2.ToString());
         Response.Write("<br>use time:" + ((TimeSpan)(t2 - t1)).Milliseconds.ToString() + " Milliseconds");
         Response.Write("<br>inser record count :");

2.快速导出db的数据到excel

这种方法就是利用

Excel.QueryTables

Excel.QueryTable

Querytable把数据快速导入excel里。我们在做复杂报表的时候，这个用的是比较多了，但是单单会这个没有用，它只是快速的把db里的数据放放到excel里，在做大量数据而且需要设定excel样式的时候我们会选择先用这种方法把数据导入excel一个临时sheet，再利sheet复制，sheet移动，和一些excel样式设定，以及excel一个强大的自动填充的功能，那么这些就可以让我们快速的做出花样多试的excel报表，当然这个要求我们比较熟练office的操作，包括宏的操作。


   public string query_table_getdata(string sourpath)
         {
             string str_path = sourpath.Substring(0, sourpath.Length - 22);
             str_path = str_path + "basic.xls";
 
             Excel.QueryTables m_objQryTables = null;
             Excel.QueryTable m_objQryTable = null;
             Excel.Application m_objExcel = null;
             Excel.Workbooks m_objBooks = null;
             Excel.Workbook m_objBook = null;
             Excel.Sheets m_objSheets = null;
             Excel.Worksheet m_objSheet = null;
             Excel.Range m_objRange = null;
             m_objExcel = new Excel.Application();
 
             //try
             //{
                 m_objBooks = m_objExcel.Workbooks;
                 m_objBooks.Open(sourpath, 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);
 
                 m_objBook = (Excel.Workbook)m_objBooks.get_Item(1);
 
 
                 m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
                 m_objSheet = (Excel.Worksheet)m_objSheets.get_Item(1);
                 m_objRange = m_objSheet.get_Range("A2", Type.Missing);
                 m_objQryTables = m_objSheet.QueryTables;
                 string sqlstr = "SELECT [day01],[day02],[day03],[day04],[day05],[day06],[day07],[day08],[day09],[day10],[day11],[day12],[day13],[day14]";
                 sqlstr += ",[week01] ,[week02],[week03],[week04],[week05],[week06],[week07],[week08],[week09],[week10],[week11],[week12],[week13],[week14]";
                 sqlstr += ",[week15],[week16],[week17],[week18],[week19],[week20],[week21],[week22],[week23],[week24]";
                 sqlstr += " FROM [GDS_Service].[dbo].[GDS_Service_Report_Base] order by groupID ,id";
                              //可以放在配置文件里
                 string conn = @"Provider=SQLOLEDB.1;Data Source=MININT-G87PHNA\SQLEXPRESS;uid=xijun_ke;Password=12345678;
                   Initial Catalog=GDS_Service;Persist Security Info=False;";
 
                 m_objQryTable = (Excel.QueryTable)m_objQryTables.Add("OLEDB;" + conn, m_objRange, sqlstr);
 
                 m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows;
 
                 m_objQryTable.Refresh(false);
                 m_objBook.SaveAs(str_path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
                 m_objBook.Close(false, Type.Missing, Type.Missing);
             /