C# 使用DataSet+dataAdapter操作后台数据库之事务处理方法1，欢迎拍砖
以下代码展示了使用DataSet+dataAdapter操作后台数据库的方法，并提供了事务处理。
代码
1
using
System;
2
using
System.Web.Services;
3
using
System.Data;
4
using
System.Data.OleDb;
5
6
namespace
TransactionTest
7
{
8
///
<summary>
9
///
Service1 的摘要说明
10
///
</summary>
11
[WebService(Namespace
=
"
http://tempuri.org/
"
)]
12
[WebServiceBinding(ConformsTo
=
WsiProfiles.BasicProfile1_1)]
13
[System.ComponentModel.ToolboxItem(
false
)]
14
//
若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
15
//
[System.Web.Script.Services.ScriptService]
16
public
class
TransWsTest : System.Web.Services.WebService
17
{
18
//
私有属性
19
private
OleDbConnection _DBConn;
20
private
OleDbTransaction _DBTrans;
21
22
[WebMethod]
23
public
string
HelloWorld()
24
{
25
_DBConn.Close();
26
return
"
Hello World
"
;
27
}
28
29
[WebMethod]
30
public
string
TransTest_Insert()
31
{
32
try
33
{
34
35
InsertData(
"
马侃
"
,
"
研发部
"
);
36
InsertData(
"
李伟
"
,
"
研发部
"
);
37
//
InsertData("马侃", "研发部");
38
39
//
若不启用事务，则屏蔽此行
40
_DBTrans.Commit();
41
42
return
"
OK
"
;
43
}
44
catch
(Exception ex)
45
{
46
//
若不启用事务，则屏蔽此行
47
_DBTrans.Rollback();
48
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return
ex.Message;
50
}
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finally
52
{
53
_DBConn.Close();
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}
55
}
56
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[WebMethod]
58
public
string
TransTest_Update()
59
{
60
try
61
{
62
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UpdateData(
"
马侃
"
,
"
研发部
"
,
"
马强
"
,
"
研发部
"
);
64
UpdateData(
"
李伟
"
,
"
研发部
"
,
"
马强
"
,
"
研发部
"
);
65
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//
若不启用事务，则屏蔽此行
67
_DBTrans.Commit();
68
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return
"
OK
"
;
70
}
71
catch
(Exception ex)
72
{
73
//
若不启用事务，则屏蔽此行
74
_DBTrans.Rollback();
75
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return
ex.Message;
77
}
78
finally
79
{
80
_DBConn.Close();
81
}
82
}
83
84
//
Insert Data
85
private
void
InsertData(
string
name,
string
department)
86
{
87
string
sqlstr
=
"
select name,department from TransTest where 1=2
"
;
88
89
DataSet ds
=
new
DataSet();
90
OleDbDataAdapter dataAdapter
=
new
OleDbDataAdapter(sqlstr, _DBConn);
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92
//
若不启用事务，则屏蔽此行
93
dataAdapter.SelectCommand.Transaction
=
_DBTrans;
94
95
OleDbCommandBuilder cb
=
new
OleDbCommandBuilder(dataAdapter);
96
dataAdapter.Fill(ds,
"
TransTest
"
);
97
98
DataTable table
=
ds.Tables[
0
];
99
100
DataRow addRow
=
table.NewRow();
101
addRow[
"
name
"
]
=
name;
102
addRow[
"
department
"
]
=
department;
103
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table.Rows.Add(addRow);
105
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dataAdapter.Update(table.GetChanges());
107
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table.AcceptChanges();
109
}
110
111
//
Update Data
112
private
void
UpdateData(
string
oldname,
string
olddepartment,
string
newname,
string
newdepartment)
113
{
114
string
sqlstr
=
"
select id,name,department from TransTest where name='
"
+
oldname
+
"
' and department='
"
+
olddepartment
+
"
'
"
;
115
116
DataSet ds
=
new
DataSet();
117
OleDbDataAdapter dataAdapter
=
new
OleDbDataAdapter(sqlstr, _DBConn);
118
119
//
若不启用事务，则屏蔽此行
120
dataAdapter.SelectCommand.Transaction
=
_DBTrans;
121
122
OleDbCommandBuilder cb
=
new
OleDbCommandBuilder(dataAdapter);
123
dataAdapter.Fill(ds,
"
TransTest
"
);
124
125
DataTable table
=
ds.Tables[
0
];
126
127
DataRow currRow
=
table.Rows[
0
];
128
currRow[
"
name
"
]
=
newname;
129
currRow[
"
department
"
]
=
newdepartment;
130
131
dataAdapter.Update(table.GetChanges());
132
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table.AcceptChanges();
134
}
135
136
//
Delete Data
137
private
void
DeleteData()
138
{
139
140
}
141
142
//
Constructor Function
143
public
TransWsTest()
144
{
145
_DBConn
=
fGetConn();
146
_DBConn.Open();
147
148
//
若不启用事务，则屏蔽此行
149
_DBTrans
=
_DBConn.BeginTransaction();
150
}
151
152
//
获取数据库链接对象Connection
153
private
OleDbConnection fGetConn()
154
{
155
string
connStr
=
"
provider=msdaora.1;user id=bitsap;password=bitservice;data source=ttonline
"
;
156
157
OleDbConnection conn
=
new
OleDbConnection(connStr);
158
159
return
conn;
160
}
161
}
162
}
163
我们可以在DataAdapter中使用一个事务，在遇到错误之前回滚DataAdapter所进行的更新。
如这个解决方案所示，使用一个CommandBuilder产生这个DataAdapter的更新逻辑，并把这个事务与DataAdapter的SelectCommand对象相关联，如下面代码所示：
dataAdapter.SelectCommand.Transaction = _DBTrans;
如果在DataAdapter中使用自定义的更新逻辑，则这个事务必须与这个DataAdapter的DeleteCommand、InsertCommand和UpdateCommand相关联，而不是和SelectCommand相关联，如下面代码所示：
dataAdapter.DeleteCommand.Transaction = _DBTrans;
dataAdapter.InsertCommand.Transaction = _DBTrans;
dataAdapter.UpdateCommand.Transaction = _DBTrans;
请各位高手拍砖，不当之处，请指正，谢谢。