C＃相当于TryCast [英] C# equivalent to TryCast
本文介绍了C＃相当于TryCast的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有人会为我转换这个...
System.Web.UI.HtmlControls.HtmlHead标题;
header = TryCast（this.Page .Header，System.Web.UI.HtmlControls.HtmlHead）;
<％= Clinton Gallagher
NET csgallagher AT metromilwaukee.com
URL http://clintongallagher.metromilwaukee.com/
MAP http://wikimapia.org/#y=43038073&x=-...&z=17&l=0&m=h
Will somebody convert this for me...
System.Web.UI.HtmlControls.HtmlHead header;
header = TryCast(this.Page.Header, System.Web.UI.HtmlControls.HtmlHead);
<%= Clinton Gallagher
NET csgallagher AT metromilwaukee.com
URL http://clintongallagher.metromilwaukee.com/
MAP http://wikimapia.org/#y=43038073&x=-...8&z=17&l=0&m=h
推荐答案
System.Web.UI.HtmlControls.HtmlHead标题;
header = this.Page.Header as System.Web.UI.HtmlControls.HtmlHead;
if（header == null）
// cast失败...
else
//演员成功...
最诚挚的问候，
Dustin Campbell
开发者Expr ess Inc.
System.Web.UI.HtmlControls.HtmlHead header;
header = this.Page.Header as System.Web.UI.HtmlControls.HtmlHead;
if (header == null)
// cast failed...
else
// cast succeeded...
Best Regards,
Dustin Campbell
Developer Express Inc.
谢谢...
<％= Clinton
Dustin Campbell < du ***** @ no-spam-pleasedevexpress.com写在留言中
新闻：c1 ********************* *****@news.microsoft.c om ...
Thanks...
<%= Clinton
"Dustin Campbell" <du*****@no-spam-pleasedevexpress.comwrote in message
news:c1**************************@news.microsoft.c om...
System.Web.UI.HtmlControls.HtmlHead header;
header = this.Page.Header as System.Web.UI.HtmlControls.HtmlHead;
if（header == null）
// cast failed ...
其他
//演员成功...
最诚挚的问候，
Dustin Campbell
Developer Express Inc.
System.Web.UI.HtmlControls.HtmlHead header;
header = this.Page.Header as System.Web.UI.HtmlControls.HtmlHead;
if (header == null)
// cast failed...
else
// cast succeeded...
Best Regards,
Dustin Campbell
Developer Express Inc.
您也可以使用is关键字
System.Web.UI.HtmlControls.HtmlHead标题;
if（this.PageHeader是System.Web.UI.HtmlControls。 HtmlHead）
{
header =（this.PageHeader as
System.Web.UI.HtmlControls.HtmlHead）;
}
11月28日上午7:58，clintonG
< csgallag ... @ REMOVETHISTEXTmetromilwaukee.comwrote：
You can also use the "is" keyword
System.Web.UI.HtmlControls.HtmlHead header;
if (this.PageHeader is System.Web.UI.HtmlControls.HtmlHead)
{
header = (this.PageHeader as
System.Web.UI.HtmlControls.HtmlHead);
}
On Nov 28, 7:58 am, "clintonG"
<csgallag...@REMOVETHISTEXTmetromilwaukee.comwrote :
谢谢...
<％=克林顿
" Dustin坎贝尔" < dust ... @ no-spam-pleasedevexpress.com在messagenews中写道：c1 ************************** @ news.micr osoft。 com ...
Thanks...
<%= Clinton
"Dustin Campbell" <dust...@no-spam-pleasedevexpress.comwrote in messagenews:c1**************************@news.micr osoft.com...
System.Web.UI.HtmlControls.HtmlHead header;
header = this.Page.Header as System.Web .UI.HtmlControls.HtmlHead;
if（header == null）
//施放失败...
else
//演员成功...
System.Web.UI.HtmlControls.HtmlHead header;
header = this.Page.Header as System.Web.UI.HtmlControls.HtmlHead;
if (header == null)
// cast failed...
else
// cast succeeded...
最好的问候，
Dustin Campbell
Developer Express Inc.
Best Regards,
Dustin Campbell
Developer Express Inc.
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