如何在View中检查所有viewbag是否为null [英] How to check all viewbag is not null in View

问题描述

我需要显示所有viewbag！= null，即使单个Viewbag为null也会显示给出错误消息 

I Need have to display all viewbag != null, even a single Viewbag is null it will Display Given error message 

请任何人告诉我我该怎么做?????

please any one assest me How Can I Do?????

Darshan Kumar B

Darshan Kumar B

推荐答案

ViewBag的类型为DynamicViewDataDictionary（在System.Web.Mvc命名空间中）。这意味着您可以通过添加属性并引用这些相同的属性来与其进行交互。您可以将任何对象添加到视图包中，以便在视图中使用，例如

示例要检查空值，您可以对属性运行简单的空检查。

ViewBag is of type DynamicViewDataDictionary (in System.Web.Mvc namespace). So that means you can interact with it by adding properties and referring to those same properties. You can add any object to the view bag for use on your view like this example To check for nulls, you would run a simple null check against the property.

上面，我将展示如何使用模式匹配与ViewBag中的值进行交互但你已经知道那是什么价值了。请记住，ViewBag将在服务器端执行。

Above, I show how you can use pattern matching to interact with the value that's in the ViewBag but you would already know what that value is. Bear in mind that ViewBag will be executed on server side.

我希望你觉得这很有用。

I hope you find this helpful.

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