在mvc3 razor databasefirst中下载 [英] Dropdowncascading in mvc3 razor databasefirst

问题描述

大家好，



我正在做Mvc3 razor数据库第一次应用程序我正在为国家和州做Dropdowncascading实际上我正在关注这个例子





http://www.c-sharpcorner.com/uploadfile/2124ae/cascading-dropdown-list-in-asp-net-mvc- 2-using-jquery /



但我收到的错误如对象引用未设置为对象实例。



任何人都可以帮我Plzzzzzz。



谢谢，

Hi all,

I am doing Mvc3 razor database first application in this i am doing Dropdowncascading for countries and states actually i am following this example


http://www.c-sharpcorner.com/uploadfile/2124ae/cascading-dropdown-list-in-asp-net-mvc-2-using-jquery/

but i am getting errors like "Object reference not set to an instance of object".

Can anyone help me Plzzzzzz.

Thanks,

推荐答案

对象引用未设置为对象的实例

当您尝试使用属性或调用null对象的方法时，会发生此错误。更多细节：此处 [ ^ ]



Visual Studio DEBUGGER的简单使用可以告诉你对象因为它正在发生。只需查看堆栈跟踪并将调试器放在该行上即可。检查该行的对象，看看是否有任何一个为null，并且您正在尝试使用该对象属性。处理相同。

Object reference not set to an instance of an object
This error happens when you try to use a property or call a method of an object that is null. More details: here[^]

A simple use of Visual studio DEBUGGER can tell you the object because of which it is happening. Just look at the stack trace and put a debugger on that line. Check the objects of that line and see if any one is null and you are trying to use that objects property. Handle the same.

这篇关于在mvc3 razor databasefirst中下载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！