Url.Action 如何工作 Asp.net MVC？

发布于 2024-08-12 03:17:06 字数 399 浏览 5 评论 0原文

这与我问过的另一个问题有些相关，但我想为什么不单独问它。

如果我要在视图中放置类似以下内容，

<td><img src='<%= Url.Action( "DisplayImage" , "User" , new { id = item.id} ) %>' alt="" /></td>

它应该显示它吗？

<td>
   <img src='/User.mvc/DisplayImage?id=U00915441' alt="" />
</td>

或者 src 属性的值实际上会被 UserController GetImage 操作的结果替换吗？

原文

This is somewhat related to another question I've asked but I figure why not ask it seperately.

If I were to place something like the following in a view

<td><img src='<%= Url.Action( "DisplayImage" , "User" , new { id = item.id} ) %>' alt="" /></td>

Is it supposed to display this?

<td>
   <img src='/User.mvc/DisplayImage?id=U00915441' alt="" />
</td>

Or would the value of the src-attribute actually be replaced with the results of the UserController GetImage Action?

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浮光之海 2024-08-19 03:17:06

它将构造操作的路径，返回一个 url，而不是执行操作的结果。

结果将是：

<td>
   <img src='/User.mvc/DisplayImage?id=U00915441' alt="" />
</td>

示例代码。假设您的用户模型将图像存储在字节数组中。如果您使用的是 LINQ 并且该属性是二进制，然后使用 ToArray() 方法将其转换为字节数组。请注意需要用户登录并使用 GET 请求的属性。

[Authorize]
[AcceptVerbs( HttpVerbs.Get )]
public ActionResult DisplayImage( string id )
{
     var user = ...get user from database...

     return File( user.Image, "image/jpeg" );
}

}

It will construct the path to the action, returning a url, not the results of executing the action.

The results will be:

<td>
   <img src='/User.mvc/DisplayImage?id=U00915441' alt="" />
</td>

Example code. assumes your user model has the image stored in a byte array. If you are using LINQ and the property is a Binary, then use the ToArray() method to convert it to a byte array. Note the attributes which will require that the user be logged in and using a GET request.

[Authorize]
[AcceptVerbs( HttpVerbs.Get )]
public ActionResult DisplayImage( string id )
{
     var user = ...get user from database...

     return File( user.Image, "image/jpeg" );
}

}

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