日志不说谎--Asp.net的生命周期
这个问题解决掉了，要想知道为什么Page.IsPostBack为true，就要看看Asp.net中是怎么实现这个属性的；
打开Reflector，依次点开System.Web.UI.Page
public
bool
get_IsPostBack()
{
if (this._requestValueCollection != null)
{
if (this._isCrossPagePostBack)
{
return true;
}
if (this._pageFlags[8])
{
return false;
}
if ((this.Context.ServerExecuteDepth <= 0) || ((this.Context.Handler != null) && (base.GetType() == this.Context.Handler.GetType())))
{
return !this._fPageLayoutChanged;
}
}
return false;
}
IsPostBack由两个因素决定：
1
.request value collection (form post collection)
if
that
'
s missing then it
'
s not postback straight away.
2
.detected
if
data coming from ViewState contains same hash code
as
on previous request ，that
is
if
the hash code doesn
'
t match then it is not a postback
这个问题解决掉了，要想知道为什么Page.IsPostBack为true，就要看看Asp.net中是怎么实现这个属性的；打开Reflector，依次点开System.Web.UI.Page
public
bool
get_IsPostBack()
{ if (this._requestValueCollection != null) { if (this._isCrossPagePostBack) { return true; } if (this._pageFlags[8]) { return false; } if ((this.Context.ServerExecuteDepth <= 0) || ((this.Context.Handler != null) && (base.GetType() == this.Context.Handler.GetType()))) { return !this._fPageLayoutChanged; } } return false;}
IsPostBack由两个因素决定：
1
.request value collection (form post collection)
if
that
'
s missing then it
'
s not postback straight away.
2
.detected
if
data coming from ViewState contains same hash code
as
on previous request ，that
is
if
the hash code doesn
'
t match then it is not a postback
