Dim cmd2 As New SQLCommand
cmd2.CommandText = "u pdate {测试数据库} set [C] ='"& c1 &"',[DF]='"& df1 &"' where 项目编号 = '" & bh & "' and 样本编号 =1"
cmd2.ExecuteNonQuery
cmd2.CommandText = "u pdate {测试数据库} set [C] ='"& c2 &"',[DF]='"& df2 &"' where 项目编号 = '" & bh & "' and 样本编号 =2"
cmd2.ExecuteNonQuery
cmd2.CommandText = "u pdate {测试数据库} set [C] ='"& c3 &"',[DF]='"& df3 &"' where 项目编号 = '" & bh & "' and 样本编号 =3"
cmd2.ExecuteNonQuery
cmd2.CommandText = "u pdate {测试数据库} set [C] ='"& c4 &"',[DF]='"& df4 &"' where 项目编号 = '" & bh & "' and 样本编号 =4"
cmd2.ExecuteNonQuery
如果是sql server,可以吧sql用分号分割放到一起,如
cmd2.CommandText = "u pdate {测试数据库} set [C] ='"& c2 &"',[DF]='"& df2 &"' where 项目编号 = '" & bh & "' and 样本编号 =2;u pdate {测试数据库} set [C] ='"& c3 &"',[DF]='"& df3 &"' where 项目编号 = '" & bh & "' and 样本编号 =3"