C# 读取excel数据

原文地址：https://www.cnblogs.com/ammy714926/p/4905026.html

        string path = "D:\\test.xlsx";
            string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";
            using (OleDbConnection conn = new OleDbConnection(connstring))
            {
                conn.Open();
                DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" }); //得到所有sheet的名字
                string firstSheetName = sheetsName.Rows[0][2].ToString(); //得到第一个sheet的名字
                string sql = string.Format("SELECT * FROM [{0}]", firstSheetName); //查询字符串
                    //string sql = string.Format("SELECT * FROM [{0}] WHERE [日期] is not null", firstSheetName); //查询字符串
                OleDbDataAdapter ada = new OleDbDataAdapter(sql, connstring);
                DataSet set = new DataSet();
                ada.Fill(set);
               var aaa= set.Tables[0]; 
            }
            Console.ReadLine();

如果报错， 未在本地计算机上注册“Microsoft.ACE.OLEDB.12.0”提供程序

请到 https://www.microsoft.com/zh-CN/download/details.aspx?id=13255 下载AccessDatabaseEngine.exe，不要下载AccessDatabaseEngine64.exe，否则还会提示错误！