我正在asp.net mvc 3中开发一个web应用程序。 我对它很陌生。在使用razor的视图中，我想声明一些局部变量，并在整个页面中使用它。如何做到这一点呢?
能够执行以下操作似乎相当简单:
@bool isUserConnected = string.IsNullOrEmpty(Model.CreatorFullName);
@if (isUserConnected)
{ // meaning that the viewing user has not been saved
<div>
<div> click to join us </div>
<a id="login" href="javascript:void(0);" style="display: inline; ">join</a>
</div>
}
但这行不通。这可能吗?
当前回答
我觉得你已经很接近了，试试这个:
@{bool isUserConnected = string.IsNullOrEmpty(Model.CreatorFullName);}
@if (isUserConnected)
{ // meaning that the viewing user has not been saved so continue
<div>
<div> click to join us </div>
<a id="login" href="javascript:void(0);" style="display: inline; ">join here</a>
</div>
}
其他回答
这不是OP问题的直接答案，但也可能对你有帮助。你可以在范围内的html旁边声明一个局部变量。
@foreach (var item in Model.Stuff)
{
var file = item.MoreStuff.FirstOrDefault();
<li><a href="@item.Source">@file.Name</a></li>
}
你可以把所有东西都放在一个块中，并轻松地在该块中编写任何你想要的代码，只是下面的代码:
@{
bool isUserConnected = string.IsNullOrEmpty(Model.CreatorFullName);
if (isUserConnected)
{ // meaning that the viewing user has not been saved
<div>
<div> click to join us </div>
<a id="login" href="javascript:void(0);" style="display: inline; ">join</a>
</div>
}
}
它可以帮助你有一个更干净的代码，也可以防止你的页面加载多次不同的代码块
我觉得你已经很接近了，试试这个:
@{bool isUserConnected = string.IsNullOrEmpty(Model.CreatorFullName);}
@if (isUserConnected)
{ // meaning that the viewing user has not been saved so continue
<div>
<div> click to join us </div>
<a id="login" href="javascript:void(0);" style="display: inline; ">join here</a>
</div>
}
我认为变量应该在同一个块中:
@{
bool isUserConnected = string.IsNullOrEmpty(Model.CreatorFullName);
if (isUserConnected)
{
// meaning that the viewing user has not been saved
<div>
<div> click to join us </div>
<a id="login" href="javascript:void(0);" style="display: inline; ">join</a>
</div>
}
}
如果您希望一个变量在整个页面中都可以访问，最好在文件的顶部定义它。(可以使用隐式类型也可以使用显式类型。)
@{
// implicit type
var something1 = "something";
// explicit type
string something2 = "something";
}
<div>@something1</div> @*display first variable*@
<div>@something2</div> @*display second variable*@
