SqlDataAdapter da=newSqlDataAdapter(); da.SelectCommand=cmd; SqlDataAdapter的构造函数 strSql是查询数符串;strConn是数据库连接字符串;cmd是SqlCommand对象;cn是SqlConnection对象。 SqlDataAdapter da=newSqlDataAdapter(strSql,strConn); SqlDataAdapter da=newSqlDataAdapter(strSql,cn); SqlDataAdapter da=newSqlDataAdapter...
SqlDataAdapter da=new SqlDataAdapter(cmd); //创建DataAdapter数据适配器实例 DataSet ds=new DataSet();//创建DataSet实例 da.Fill(ds,"自定义虚拟表名");//使用DataAdapter的Fill方法(填充),调用SELECT命令 ConnSql.Close ();//关闭数据库 SqlDataAdapter da=new SqlDataAdapter(strSQL,ConnSql); //创建DataAd...
("select * from CustTest order by CustId", cn);//Initialize the SqlCommand object that will be used as the DataAdapter's UpdateCommand//Notice that the WHERE clause uses only the CustId field to locate the record to be updatedDAUpdateCmd =newSqlCommand("Update CustTest s...
new SqlDataAdapter("select * from CustTest order by CustId", cn); //Initialize the SqlCommandBuilder object to automatically generate and initialize //the UpdateCommand, InsertCommand and DeleteCommand properties of the SqlDataAdapter cmdBuilder = new SqlCommandBuilder(da); //Populate the ...
using (SqlDataAdapter adapter = new SqlDataAdapter(sql, conStr)){ adapter.Fill(ds, "T2");} 这里需要注意的是，SqlDataAdapter 会对SqlConnection、SqlCommand 和cmd.ExecuteReader() 进行封装，简化了数据操作的过程。通过使用DataAdapter，我们能够方便地从数据库读取数据，并将这些数据加载到DataSet 中...
intAffectedRows=myCmd.ExecuteNonQuery();其中myConn是连接对象，myTrans是事务对象，strSql是SQL语句，第⼀个例⼦通常是执⾏有返回数据集的查询如SELECT语句 第⼆个例⼦通常是执⾏INSERT、UPDATE、DELETE语句。在ADO.NET的DataAdapter其实是由很多个Command组成的。如SelectCommand,DeleteCommand,InsertCommand,...
SqlDataAdapter da=new SqlDataAdapter(); da.SelectCommand=cmd; SqlDataAdapter的构造函数 strSql是查询数符串;strConn是数据库连接字符串;cmd是SqlCommand对象;cn是SqlConnection对象。 SqlDataAdapter da=new SqlDataAdapter(strSql,strConn); SqlDataAdapter da=new SqlDataAdapter(strSql,cn); ...
SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet();try { da.Fill(ds);} （二）、这里主要总结一下批量insert和批量update的操作 SqlDataAdapter用于批量更新的用法：A、批量insert：使用一个状态链接，一次插入N条数据，可以提高效率。举例：第一步：//先构造DataTable，包括列名和数据。D...
("select * from CustTest order by CustId", cn);//Initialize the SqlCommand object that will be used as the DataAdapter's UpdateCommand//Notice that the WHERE clause uses only the CustId field to locate the record to be updatedDAUpdateCmd =newSqlCommand("Update CustTest set CustName...
SqlDataAdapter da=new SqlDataAdapter(); da.SelectCommand=cmd; 2、SqlDataAdapter构造函数 ①string strConn=“Provider=...”; string strSQL=“select *from Customers”; SqlDataAdapter da=new SqlDataAdapter(strSQL,strConn); ②string strConn=“Provider=...”; SqlConnection...