在c＃中使用网络摄像头的问题 [英] Problem with using webcam in c#

问题描述

嗨
i想在c＃中使用网络摄像头，但是我有什么办法可以正常运行？

这就是问题

我的问题图片[ ^ ]

我尝试了很多代码，但代码有相同的错误，我的意思是这个错误

Hi i want to use webcam in c# but it has problem what should i do to run correctly?
this is the problem
\Picture of my problem[^]
and i try many code but al the codes have the same error, i mean this error

推荐答案

当你得到一个Null对象的异常时问这样一个问题，这个消息告诉你需要学习编程语法的基础知识。 :-)



这个 [ ^ ] MSDN的网页会教你 NullReferenceException 是什么，如何最小化它，以及它被引发的原因。这是一个简单的文本，告诉您要提供存在或具有值的对象。



阅读这个 [ ^ 我的博客文章，了解它的一些概念以及最小化它的方法。

Asking such a question when you're getting an exception for an object being Null is a message telling that you need to learn the basic of programming syntax. :-)

This[^] web page at MSDN teaches you what a NullReferenceException is, how to minimize it, and why it gets raised. This is a simple text telling you want to provide an object that exists or has a value.

Read this[^] blog post of mine to learn a few concepts about it and the methods to minimize it.

插入break-代码中的点：在Visual Studio的调试模式下，单步执行代码（F11）;找到发生空引用错误的位置，然后检查错误发生前的点处的变量：什么是'null，不应该是'null。



然后，在这里描述具体细节，并包括你的代码。



除非你学习了解决问题的基础知识，否则你从来没有能够以程序员的身份取得进步。

Insert break-points in your code: in Debug mode in Visual Studio, single-step through the execution of the code (F11); locate where the 'null reference' error is occurring, and then examine the variables at the point just before the error occurs: what is 'null that should not be 'null.

And, then, describe the specifics here, and include your code.

Unless you learn the basics of de-bugging, you are never going to be able to progress as a programmer.

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