概括ADO.NET数据库连接的所有形式(基础）
第一种
通过直接在cs文件中编写查询语句调用 dbcom.ExecuteNonQuery();执行插入数据
1
//
连接字符串
2
string
ConnectionString
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ConnectionString;
3
string
ProviderName
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ProviderName;
4
DbProviderFactory dbproviderfactory
=
DbProviderFactories.GetFactory(ProviderName);
5
DbConnection dbcon
=
dbproviderfactory.CreateConnection();
6
dbcon.ConnectionString
=
ConnectionString;
7
DbCommand dbcom
=
dbproviderfactory.CreateCommand();
8
dbcom.Connection
=
dbcon;
9
dbcom.CommandText
=
"
Insert into dt_Table01(name,psw) values(@name,@psw)
"
;
10
dbcom.CommandType
=
CommandType.Text;
11
12
//
添加参数
13
DbParameter dbparameter
=
dbproviderfactory.CreateParameter();
14
dbparameter.ParameterName
=
"
@name
"
;
15
dbparameter.DbType
=
DbType.String;
16
dbparameter.Value
=
"
xiaolong
"
;
17
dbcom.Parameters.Add(dbparameter);
18
dbparameter
=
dbproviderfactory.CreateParameter();
19
dbparameter.ParameterName
=
"
@psw
"
;
20
dbparameter.DbType
=
DbType.String;
21
dbparameter.Value
=
"
123
"
;
22
dbcom.Parameters.Add(dbparameter);
23
dbcon.Open();
24
try
25
{
26
dbcom.ExecuteNonQuery();
27
}
28
catch
(Exception ex)
29
{
30
//
将错误写入日志里
31
AddLogError(ex.ToString());
32
Response.Redirect(
"
~/ErrorPage.aspx
"
);
33
}
34
finally
35
{
36
dbcon.Close();
37
}
第二种当然是调用存储过程
1
//
存储过程的
2
string
ConnectionString
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ConnectionString;
3
string
ProviderName
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ProviderName;
4
DbProviderFactory dbproviderfactory
=
DbProviderFactories.GetFactory(ProviderName);
5
DbConnection dbcon
=
dbproviderfactory.CreateConnection();
6
dbcon.ConnectionString
=
ConnectionString;
7
DbCommand dbcom
=
dbproviderfactory.CreateCommand();
8
dbcom.Connection
=
dbcon;
9
dbcom.CommandType
=
CommandType.StoredProcedure;
10
dbcom.CommandText
=
"
InsertTable01
"
;
11
DbParameter dbparameter
=
dbproviderfactory.CreateParameter();
12
dbparameter.DbType
=
DbType.String;
13
dbparameter.ParameterName
=
"
@name
"
;
14
dbparameter.Value
=
"
xiaohe
"
;
15
dbcom.Parameters.Add(dbparameter);
16
dbparameter
=
dbproviderfactory.CreateParameter();
17
dbparameter.ParameterName
=
"
@psw
"
;
18
dbparameter.DbType
=
DbType.String;
19
dbparameter.Value
=
"
123
"
;
20
dbcom.Parameters.Add(dbparameter);
21
dbcon.Open();
22
try
23
{
24
dbcom.ExecuteNonQuery();
25
}
26
catch
(Exception ex)
27
{
28
AddLogError(ex.ToString());
29
Response.Redirect(
"
~/ErrorPage.aspx
"
);
30
}
31
finally
32
{
33
dbcon.Close();
34
}
第三种就是可能同时插入两张表或者三张表或者更多。必须是同时，运用到了事务回滚机制。存储过程写法就不给出来了和上面一样。只是在存储过程编写事务。
1
//
同时插入两张的表
2
string
ConnectionString
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ConnectionString;
3
string
ProviderName
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ProviderName;
4
DbProviderFactory dbproviderfactory
=
DbProviderFactories.GetFactory(ProviderName);
5
DbConnection dbcon
=
dbproviderfactory.CreateConnection();
6
dbcon.ConnectionString
=
ConnectionString;
7
DbCommand dbcom
=
dbproviderfactory.CreateCommand();
8
dbcom.Connection
=
dbcon;
9
dbcom.CommandType
=
CommandType.Text;
10
11
DbParameter dbparameter
=
dbproviderfactory.CreateParameter();
12
dbparameter.DbType
=
DbType.String;
13
dbparameter.ParameterName
=
"
@name
"
;
14
dbparameter.Value
=
"
xiaohei
"
;
15
dbcom.Parameters.Add(dbparameter);
16
dbparameter
=
dbproviderfactory.CreateParameter();
17
dbparameter.ParameterName
=
"
@psw
"
;
18
dbparameter.DbType
=
DbType.String;
19
dbparameter.Value
=
"
123
"
;
20
dbcom.Parameters.Add(dbparameter);
21
dbparameter
=
dbproviderfactory.CreateParameter();
22
dbparameter.DbType
=
DbType.String;
23
dbparameter.ParameterName
=
"
@teacher
"
;
24
dbparameter.Value
=
"
heihei
"
;
25
dbcom.Parameters.Add(dbparameter);
26
27
dbcon.Open();
28
//
事务开始
29
DbTransaction dbtran
=
dbcon.BeginTransaction();
30
dbcom.Transaction
=
dbtran;
31
32
try
33
{
34
dbcom.CommandText
=
"
insert into dt_table01(name,psw) values(@name,@psw)
"
;
35
dbcom.ExecuteNonQuery();
36
dbcom.CommandText
=
"
insert into dt_table03(teacher,psw) values(@teacher,@psw)
"
;
37
dbcom.ExecuteNonQuery();
38
//
成功就提交
39
dbtran.Commit();
40
}
41
catch
(Exception ex)
42
{
43
//
出错就回滚
44
dbtran.Rollback();
45
AddLogError(ex.ToString());
46
Response.Redirect(
"
~/ErrorPage.aspx
"
);
47
}
48
finally
49
{
50
dbcon.Close();
51
dbtran.Dispose();
52
}
第四种
通过使用DbDataAdapter来获得查询的结果
1
//
查询数据库
2
string
ConnectionString
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ConnectionString;
3
string
ProviderName
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ProviderName;
4
DbProviderFactory dbproviderfactory
=
DbProviderFactories.GetFactory(ProviderName);
5
DbConnection dbcon
=
dbproviderfactory.CreateConnection();
6
dbcon.ConnectionString
=
ConnectionString;
7
DbCommand dbcom
=
dbproviderfactory.CreateCommand();
8
dbcom.Connection
=
dbcon;
9
dbcom.CommandText
=
"
Select * from dt_Table01 where name=@name
"
;
10
dbcom.CommandType
=
CommandType.Text;
11
DbParameter dbparameter
=
dbproviderfactory.CreateParameter();
12
dbparameter.ParameterName
=
"
@name
"
;
13
dbparameter.DbType
=
DbType.String;
14
dbparameter.Value
=
"
xiaolong
"
;
15
dbcom.Parameters.Add(dbparameter);
16
DataSet ds
=
new
DataSet();
17
DbDataAdapter dbDataAdapeter
=
dbproviderfactory.CreateDataAdapter();
18
dbDataAdapeter.SelectCommand
=
dbcom;
19
try
20
{
21
dbDataAdapeter.Fill(ds,
"
data
"
);
22
}
23
catch
(Exception ex)
24
{
25
AddLogError(ex.ToString());
26
Response.Redirect(
"
~/ErrorPage.aspx
"
);
27
}
28
finally
29
{
30
dbDataAdapeter.Dispose();
31
}
第5种
使用DbDataReader或者查询结果，这里给出查询第一行第一列值，当然也可以直接调用Command.ExecuteScalar();函数
1
string
ConnectionString
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ConnectionString;
2
string
ProviderName
=
ConfigurationManager.ConnectionStrings[
"
db_Test01ConnectionString
"
].ProviderName;
3
DbProviderFactory dbproviderfactory
=
DbProviderFactories.GetFactory(ProviderName);
4
DbConnection dbcon
=
dbproviderfactory.CreateConnection();
5
dbcon.ConnectionString
=
ConnectionString;
6
DbCommand dbcom
=
dbproviderfactory.CreateCommand();
7
dbcom.Connection
=
dbcon;
8
dbcom.CommandText
=
"
Select * from dt_Table01 where name=@name
"
;
9
dbcom.CommandType
=
CommandType.Text;
10
DbParameter dbparameter
=
dbproviderfactory.CreateParameter();
11
dbparameter.ParameterName
=
"
@name
"
;
12
dbparameter.DbType
=
DbType.String;
13
dbparameter.Value
=
"
xiaolong
"
;
14
dbcom.Parameters.Add(dbparameter);
15
dbcon.Open();
16
DbDataReader dbDataReader
=
null
;
17
string
re
=
string
.Empty;
18
try
19
{
20
dbDataReader
=
dbcom.ExecuteReader(CommandBehavior.SingleRow);
21
}
22
catch
(Exception ex)
23
{
24
AddLogError(ex.ToString());
25
Response.Redirect(
"
~/ErrorPage.aspx
"
);
26
}
27
finally
28
{
29
dbcon.Close();
30
dbDataReader.Close();
31
}
32
//
读入值
33
if
(dbDataReader.Read())
34
{
35
//
得到第一列值
36
re
=
dbDataReader.GetValue(
0
).ToString();
37
}
38
re
=
re
+
"
hah
"
;
当然还可以自己编写一些常用的调用例如：或者查询结果第一列的值等等。
大致上就是以上这几种形式了。
存储过程，Command直接执行，DataReader,DataAdapter,事务
由于笔者知识有限，如果还有其他形式请您补充上来