现在实际的情况是这样的:
客户有一台打卡机,员工打卡的信息全部储存在打卡机的Access数据库里面,现在客户引入了一种新的管理系统,需要将Access数据库中的打卡数据同步到SQL Server数据库中,由于时间比较久,数据积累了有40多万条。
软件功能:
选择Access数据库文件,填入目标SQL Server数据库的IP地址,然后开始进行同步。
实现方法:
1、先把Access数据库中要导入的数据存入DataTable中
配置文件中的数据库连接字符串
1 <connectionStrings> 2 <add name="oleConStr" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="/> 3 4 <add name="sqlConStr" connectionString ="server=tiantiankaixing;database=新建数据库;trusted_connection=sspi"/> 5 </connectionStrings>
封装读取Access数据库数据到DataTable中的方法
1 public static string OleConStr = ConfigurationManager.ConnectionStrings["oleConStr"].ConnectionString ; 2 3 public static DataTable OleGetDataTable(string sql, string filePath) 4 { 5 6 string a = OleConStr + filePath; 7 using (OleDbConnection conn = new OleDbConnection(a)) 8 { 9 10 using (OleDbDataAdapter da = new OleDbDataAdapter(sql, conn)) 11 { 12 try 13 { 14 conn.Open(); 15 DataTable dt = new DataTable(); 16 da.Fill(dt); 17 return dt; 18 } 19 catch (Exception ex) 20 { 21 throw ex; 22 } 23 finally 24 { 25 if (conn.State == ConnectionState.Open) 26 conn.Close(); 27 } 28 } 29 } 30 }
读取目标Access数据库到Datatable
1 string sql = "select Id,Time from checkinout"; 2 DataTable dt = AcHelper.OleGetDataTable(sql, @"F:project iantiankaixingadmin.mdb");
2、封装批量插入数据SQL Server数据的方法
1 public static void DataTableToSQLServer(DataTable dt,string connectString) 2 { 3 string connectionString = connectString; 4 5 using (SqlConnection destinationConnection = new SqlConnection(connectionString)) 6 { 7 destinationConnection.Open(); 8 9 using (SqlBulkCopy bulkCopy = new SqlBulkCopy(destinationConnection)) 10 { 11 12 13 try 14 { 15 16 bulkCopy.DestinationTableName = "checkinout";//要插入的表的表名 17 bulkCopy.BatchSize = dt.Rows.Count; 18 bulkCopy.ColumnMappings.Add("ID", "ID");//映射字段名 DataTable列名 ,数据库 对应的列名 19 bulkCopy.ColumnMappings.Add("TIME", "TIME"); 20 21 bulkCopy.WriteToServer(dt); 22 System.Windows.Forms.MessageBox.Show("插入成功"); 23 } 24 catch (Exception ex) 25 { 26 Console.WriteLine(ex.Message); 27 } 28 finally 29 { 30 31 32 } 33 } 34 35 36 } 37 38 }
3、调用DataTableToSQlServer()方法
1 string localCon = "server=tiantiankaixing;database=Test;trusted_connection=sspi"; 2 3 Entity.DataTableToSQLServer(dt, localCon);
即可将DataTable中的全部数据插入数据库
附:SqlBulkCopy的简单使用方法
1 public void Test() 2 { 3 string connectionString = "server=tiantiankaixing;database=新建数据库;trusted_connection=sspi"; 4 5 using (SqlConnection sourceConnection = 6 new SqlConnection(connectionString)) 7 { 8 sourceConnection.Open(); 9 //获取读取的表总行数 10 SqlCommand commandRowCount = new SqlCommand("select count(*) from student",sourceConnection); 11 long countStart = System.Convert.ToInt32(commandRowCount.ExecuteScalar()); 12 13 14 //使用SqlDataReader读取源数据 15 SqlCommand commandSourceData = new SqlCommand("select * from student", sourceConnection); 16 SqlDataReader reader =commandSourceData.ExecuteReader(); 17 18 //测试用,把数据从一个表批量插入到另一个表 19 //现实生活中肯定不会 20 using (SqlConnection destinationConnection =new SqlConnection(connectionString)) 21 { 22 destinationConnection.Open(); 23 24 //创建一个SQlBulkCopy对象 25 //指定目标表名 26 //指定要插入的行数 27 //指定对应的映射 28 using (SqlBulkCopy bulkCopy =new SqlBulkCopy(destinationConnection)) 29 { 30 bulkCopy.DestinationTableName ="test"; 31 bulkCopy.BatchSize = 1; 32 bulkCopy.ColumnMappings.Add("数据源列名","目标列名"); 33 34 try 35 { 36 37 bulkCopy.WriteToServer(reader); 38 } 39 catch (Exception ex) 40 { 41 Console.WriteLine(ex.Message); 42 } 43 finally 44 { 45 reader.Close(); 46 } 47 } 48 } 49 50 51 52 53 } 54 }