Enterprise Library 企业库 示例（摘录）
http://www.cnblogs.com/terryfeng/archive/2009/10/03/1577711.html
protected void Button1_Click(object sender, EventArgs e)
{
//查询数据
Database db = DatabaseFactory.CreateDatabase();
this.GridView1.DataSource = db.ExecuteReader(CommandType.Text, "SELECT * FROM Projects");
this.GridView1.DataBind();
}
protected void Button2_Click(object sender, EventArgs e)
{
//调用存储过程(直接传参数的简单调用)
Database db = DatabaseFactory.CreateDatabase("Conn2");
this.GridView1.DataSource = db.ExecuteReader("GetUser", "admin");
this.GridView1.DataBind();
}
protected void Button3_Click(object sender, EventArgs e)
{
Database db = DatabaseFactory.CreateDatabase("Conn1");
//带输出和返回参数的存储过程调用
DbCommand cmd = db.GetStoredProcCommand("addRole");
db.AddInParameter(cmd, "Id", DbType.Int32, DateTime.Now.Millisecond);
db.AddInParameter(cmd, "Name", DbType.String, "技术总监");
db.AddOutParameter(cmd, "newLastChanged", DbType.Int16, 4);
db.AddParameter(cmd, "RecordCount", DbType.Int16, ParameterDirection.ReturnValue, "", DataRowVersion.Default, 0);
db.ExecuteNonQuery(cmd);
Response.Write("输出参数值：" + db.GetParameterValue(cmd, "newLastChanged").ToString());
Response.Write("<br />返回参数值：" + db.GetParameterValue(cmd, "RecordCount").ToString());
}
protected void Button4_Click(object sender, EventArgs e)
{
//使用事务
Database db = DatabaseFactory.CreateDatabase("Conn1");
using (IDbConnection conn = db.CreateConnection())
{
conn.Open();
IDbTransaction _trans = conn.BeginTransaction();
try
{
DbCommand _cmd = db.GetSqlStringCommand("Insert Into Roles(Id,Name) values(@Id,@Name)");
db.AddInParameter(_cmd, "Id", DbType.Int32, 45);
db.AddInParameter(_cmd, "Name", DbType.String, "UI设计");
db.ExecuteNonQuery(_cmd, _trans as DbTransaction);
db.ExecuteNonQuery(_cmd, _trans as DbTransaction);//字段上建有唯一索引，故第二次插入同样记录时会报错
_trans.Commit();
}
catch
{
try
{
_trans.Rollback();//事务提交失败时，则回滚(是否回滚成功，可查看表中有无AA的记录即可)
}
catch { }
}
finally
{
conn.Close();
}
}
}
六，添加生成事件脚本，复制Config，没有Config会报错
copy "$(ProjectDir)\*.config" "$(TargetDir)"
关于缓存:
代码
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
Microsoft.Practices.EnterpriseLibrary.Caching;
using
Microsoft.Practices.EnterpriseLibrary.Caching.Expirations;
namespace
CachingBlock
{
public
class
MyData
{
public
string
Name {
set
;
get
; }
public
int
Age {
set
;
get
; }
public
string
Color {
set
;
get
; }
}
public
partial
class
WebForm1 : System.Web.UI.Page
{
const
string
KEYNAME
=
"
myDateCache
"
;
//
缓存的键值
ICacheManager cacheManager;
protected
void
Page_Load(
object
sender, EventArgs e)
{
cacheManager
=
CacheFactory.GetCacheManager();
//
实例化ICachemanager
}
protected
void
btnWrite_Click(
object
sender, EventArgs e)
{
//
生成要缓存的数据(实际开发中可以是从数据库查询出来的数据)
List
<
MyData
>
_list
=
new
List
<
MyData
>
{
new
MyData(){ Age
=
1
, Color
=
"
Yellow
"
, Name
=
"
China
"
},
new
MyData{ Age
=
2
,Color
=
"
Black
"
,Name
=
"
USA
"
}
};
AbsoluteTime _ExpireTime
=
new
AbsoluteTime(DateTime.Now.AddSeconds(
30
));
//
指定30秒后过期
cacheManager.Add(KEYNAME, _list, CacheItemPriority.Normal,
null
, _ExpireTime);
//
加入缓存
Response.Write(
"
Cache写入完成,
"
+
DateTime.Now.ToString());
}
protected
void
btnRead_Click(
object
sender, EventArgs e)
{
this
.R1.DataSource
=
GetCacheData();
this
.R1.DataBind();
Response.Write(
"
Cache加载完成,
"
+
DateTime.Now.ToString());
}
///
<summary>
///
获取缓存数据
///
</summary>
///
<returns></returns>
public
List
<
MyData
>
GetCacheData()
{
List
<
MyData
>
_cacheData
=
cacheManager.GetData(KEYNAME)
as
List
<
MyData
>
;
if
(
null
==
_cacheData)
//
记得一定要加此判断(因为缓存可能过期)
{
//
如果缓存数据为空，则重新生成数据，并加入缓存(为检测效果，特地把Color与Name前加了一个"New")
_cacheData
=
new
List
<
MyData
>
{
new
MyData(){ Age
=
1
, Color
=
"
New Yellow
"
, Name
=
"
New China
"
},
new
MyData{ Age
=
2
,Color
=
"
New Black
"
,Name
=
"
New USA
"
}
};
AbsoluteTime _ExpireTime
=
new
AbsoluteTime(DateTime.Now.AddSeconds(
30
));
//
指定30秒后过期
cacheManager.Add(KEYNAME, _cacheData, CacheItemPriority.Normal,
null
, _ExpireTime);
}
return
_cacheData;
}
protected
void
btnRemove_Click(
object
sender, EventArgs e)
{
cacheManager.Remove(KEYNAME);
Response.Write(
"
Cache清空完成,
"
+
DateTime.Now.ToString());
}
}
}