SqlDataAdapter有关InsertCommand,UpdateCommand,DeleteCommand 实例

//InsertCommand

            using (SqlConnection conn = new SqlConnection(connectionstring))

            {

                conn.Open();

                DataTable dtInsert = new DataTable();

                dtInsert.Columns.Add("DeptID", typeof(int));

                dtInsert.Columns.Add("DeptName", typeof(string));

                dtInsert.Rows.Add(new object[] { "1", "技术部" });

                dtInsert.Rows.Add(new object[] { "2", "招商部" });

                dtInsert.Rows.Add(new object[] { "3", "信息部" });



                SqlDataAdapter adapter = new SqlDataAdapter();

                adapter.InsertCommand = new SqlCommand("insert into Dept(DeptID,DeptName) values(@DeptID,@DeptName)", conn);

                adapter.SelectCommand = new SqlCommand("select * from Dept where 1=0", conn);//仅为了获得框架

                adapter.InsertCommand.Parameters.Add("DeptID", SqlDbType.Int);

                adapter.InsertCommand.Parameters.Add("DeptName", SqlDbType.VarChar);



                adapter.InsertCommand.Parameters["DeptID"].SourceColumn = "DeptID";

                adapter.InsertCommand.Parameters["DeptName"].SourceColumn = "DeptName";

                //adapter.InsertCommand.Parameters["AddDate"].Value = DateTime.Now;//直接赋值



                adapter.InsertCommand.UpdatedRowSource = UpdateRowSource.None;

                adapter.Fill(dtInsert);

                if (dtInsert.Rows.Count > 0)

                {

                    adapter.Update(dtInsert);

                }

            }

 

2,UpdateCommand

 //UpdateCommand

            using (SqlConnection conn = new SqlConnection(connectionstring))

            {

                conn.Open();

                DataSet ds = new DataSet();

                string sql = "select * from Dept";

                SqlDataAdapter adapate = new SqlDataAdapter(sql, conn);

                adapate.Fill(ds, "table1");



                foreach (DataRow datarow in ds.Tables[0].Rows)

                {

                    datarow["DeptName"] = "sc";//ai->sc

                }

                SqlCommandBuilder builder = new SqlCommandBuilder(adapate);

                adapate.Update(ds, "table1");

            }

 

3,DeleteCommand

//DeleteCommand

            using (SqlConnection conn = new SqlConnection(connectionstring))

            {

                conn.Open();

                DataSet ds = new DataSet();

                string sql = "select * from Dept";

                //string sql = "select * from Dept where deptid=1";

                SqlDataAdapter adapter = new SqlDataAdapter(sql, conn);

                adapter.Fill(ds, "table1");



                adapter.DeleteCommand = new SqlCommand("delete from Dept", conn);

                //adapter.DeleteCommand = new SqlCommand("delete from Dept where deptid=@deptid", conn);

                //adapter.DeleteCommand.Parameters.Add("deptid", SqlDbType.Int);

                //adapter.DeleteCommand.Parameters["deptid"].SourceColumn = "deptid";

                

                ds.Tables["table1"].Rows[ds.Tables["table1"].Rows.Count - 1].Delete();

                adapter.Update(ds, "table1");

            }