c#中将数据库数据导出到EXCEL中

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我分以下几步进行介绍: 1,新建一个C#应用程序,在对话框上放置一个按钮,Name=buttonOutput,Text=Output,用这个按钮激发导出程序;

2,添加对“Microsoft Excel 9.0 Object Library”的引用,根据自己计算机上安装Office版本的来确定Library的版本;

3,在代码中加入引用:

using Excel;

using System.Reflection;

 4,在buttonOutput按钮单机事件中加入以下代码:

            string strSql;
            int col = 0, row = 2;

            //定义数据变量
           private OleDbConnection conn;
           private OleDbCommand comm;
           private OleDbDataReader reader;

          //连接到数据库

            string strConnectionstring = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=DB.mdb";
            conn = new OleDbConnection(strConnectionstring);
            conn.Open();
            comm = conn.CreateCommand();

        //建立Excel应用对象

            Excel.Application xlapp = new Excel.ApplicationClass();
            xlapp.Workbooks.Add(true );
            xlapp.Visible = false  ;
            strSql = "select * from INFO";
            comm.CommandText = strSql;
            reader=comm.ExecuteReader();
            if (reader.HasRows)
            {
                for (col = 0; col < reader.FieldCount; col++)
                {
                    xlapp.Cells[1, col + 1] = reader.GetName(col); 
                }

                while (reader.Read())
                {
                    for (col = 0; col < reader.FieldCount; col++)
                    {
                        xlapp.Cells[row, col + 1] = reader.GetValue(col).ToString();  

                    }
                    row++;
                }
            }
            xlapp.Visible = true;
             xlapp.Worksheets.PrintPreview(true);
            
            //关闭数据库纪录集

            reader.Close(); 

          comm.Close();

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