如何使用 .NET 和 Dapper.NET 执行此 sql 语句?
How can I execute this sql statement with .NET and Dapper.NET?
我有以下 sql 查询:
BEGIN TRAN;
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = xxx;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', xxx);
ROLLBACK TRAN;
这是一个 ID 列表。
例如
var fooIds = new [] { 1, 2, 3, 4, 5, 6 };
那么我期待这个..
BEGIN TRAN;
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 1;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 1);
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 2;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 2);
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 3;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 3);
ROLLBACK TRAN;
Dapper可以做到吗?
注意:如果 TRAN
让这变得困难,我可以放弃它。
你可以这样做:
using (var connection = new SqlConnection(yourConnectionString))
{
connection.Open();
using (var tx = connection.BeginTransaction())
{
foreach (var fooId in fooIds)
{
connection.Execute("UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = @id; INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', @id);", new {id = fooId}, tx);
}
tx.Rollback();
}
}
Dapper 对内部 改变 查询的支持很少(它支持 IN
的列表扩展、文字注入和一些 OPTION
/UNKNOWN
调整。你有两个选择:
- 使用
StringBuilder
创建一个可以执行的大型操作(这可以通过字典参数化)
- 将事务移动到 ADO.NET 而不是 TSQL
对于后者,可能是这样的:
using(var tran = conn.BeginTransaction())
{
try
{
conn.Execute(@"
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = @id;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', @id);",
fooIds.Select(id => new { id }), transaction: tran);
}
finally // in this example, we always want to rollback
{
tran.Rollback();
}
}
我有以下 sql 查询:
BEGIN TRAN;
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = xxx;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', xxx);
ROLLBACK TRAN;
这是一个 ID 列表。 例如
var fooIds = new [] { 1, 2, 3, 4, 5, 6 };
那么我期待这个..
BEGIN TRAN;
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 1;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 1);
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 2;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 2);
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = 3;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', 3);
ROLLBACK TRAN;
Dapper可以做到吗?
注意:如果 TRAN
让这变得困难,我可以放弃它。
你可以这样做:
using (var connection = new SqlConnection(yourConnectionString))
{
connection.Open();
using (var tx = connection.BeginTransaction())
{
foreach (var fooId in fooIds)
{
connection.Execute("UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = @id; INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', @id);", new {id = fooId}, tx);
}
tx.Rollback();
}
}
Dapper 对内部 改变 查询的支持很少(它支持 IN
的列表扩展、文字注入和一些 OPTION
/UNKNOWN
调整。你有两个选择:
- 使用
StringBuilder
创建一个可以执行的大型操作(这可以通过字典参数化) - 将事务移动到 ADO.NET 而不是 TSQL
对于后者,可能是这样的:
using(var tran = conn.BeginTransaction())
{
try
{
conn.Execute(@"
UPDATE [dbo].[Foo] SET StatusType = 2 WHERE FooId = @id;
INSERT INTO [dbo].[FooNotes] (FooId, Note) VALUES ('blah....', @id);",
fooIds.Select(id => new { id }), transaction: tran);
}
finally // in this example, we always want to rollback
{
tran.Rollback();
}
}