ADO.NET - 更新多个数据表

Question

所以我有一些这样的代码：

        DataSet dataSet = new DataSet();            
        DataTable dataTable1 = new DataTable("Table1");
        DataTable dataTable2 = new DataTable("Table2");
        DataTable dataTable3 = new DataTable("Table3");
        DataTable dataTable4 = new DataTable("Table4");
        dataSet.Tables.Add(dataTable1);
        dataSet.Tables.Add(dataTable2);
        dataSet.Tables.Add(dataTable3);
        dataSet.Tables.Add(dataTable4);

        SqlDataAdapter dataAdapter1 = new SqlDataAdapter("SELECT * FROM Table1 WHERE ID = 1", sqlConnection);
        SqlDataAdapter dataAdapter2 = new SqlDataAdapter("SELECT Column1, Column2, Column3 FROM Table2", sqlConnection);
        SqlDataAdapter dataAdapter3 = new SqlDataAdapter("SELECT Column1, Column2, Column3 FROM Table3", sqlConnection);
        SqlDataAdapter dataAdapter4 = new SqlDataAdapter("SELECT Column1, Column2, Column3 FROM Table4", sqlConnection);

        SqlCommandBuilder commandBuilder1 = new SqlCommandBuilder(dataAdapter1);
        SqlCommandBuilder commandBuilder2 = new SqlCommandBuilder(dataAdapter2);
        SqlCommandBuilder commandBuilder3 = new SqlCommandBuilder(dataAdapter3);
        SqlCommandBuilder commandBuilder4 = new SqlCommandBuilder(dataAdapter4);            

        dataAdapter1.Fill(dataTable1);
        dataAdapter2.FillSchema(dataTable2, SchemaType.Source);
        dataAdapter3.FillSchema(dataTable3, SchemaType.Source);
        dataAdapter4.FillSchema(dataTable4, SchemaType.Source);

        //do a bunch of code that updates the one row from Table1
        //and adds lots of new rows to Table2, Table3, Table4

        dataAdapter1.Update(dataTable1);
        dataAdapter2.Update(dataTable2);
        dataAdapter3.Update(dataTable3);
        dataAdapter4.Update(dataTable4);
        dataSet.AcceptChanges();

有没有办法让这更简单？如果计算机在“dataAdapter2.Update(dataTable2);”之后在线崩溃会发生什么？我希望能够以某种方式仅使用一个更新调用来更新所有内容。这可能吗？

另外，这甚至是最好的方法吗？ “this”是在多个表中创建一堆新行，具体取决于一个特定表中的一个特定行中的内容。

Answer 1

您可以将数据集传递到 DataAdapter 的更新语句中，这将更新数据集中的所有表。 更新：不，它不会。 DataAdapter 总是只更新一张表。从 MSDN documentation 到将 DataSet 作为其参数的 Update() 的重载，“从名为“Table “。”对困惑感到抱歉。不过，其余答案仍然有效。

如果您想确保所有更新作为一个原子单元成功或失败，请使用SqlTransaction 对象：

DataSet ds = new DataSet();
// do something with the dataset

SqlDataAdapter dataAdapter = new SqlDataAdapter();
SqlConnection cn = new SqlConnection(connString);
cn.Open();

SqlTransaction trans = cn.BeginTransaction();

SqlDataAdapter dataAdapter = new SqlDataAdapter();

// set the InsertCommand, UpdateCommand, and DeleteCommand for the data adapter

dataAdapter.InsertCommand.Transaction = trans;
dataAdapter.UpdateCommand.Transaction = trans;
dataAdapter.DeleteCommand.Transaction = trans;

try
{
    dataAdapter.Update( ds );
    trans.Commit();
}
catch
{
    trans.Rollback();
}

cn.Close();