VB.NET - 空字符串 [英] VB.NET - string of nulls

问题描述

我有一个从 CSV 文件中读入的字符串值.CSV 文件包含 7 个 NULL 字节，我已经通过在十六进制编辑器中打开它来确认这一点，并且确实有 7 个 0x0 字节在那里.这个字符串让我很痛苦.

I have a string value read in from a CSV file. The CSV file contains 7 NULL bytes, I have confirmed this by opening it in a hex editor and sure enought there are 7 0x0 bytes in there. This string is causing me pain.

在 vb.net 中，当我检查此字符串的 strlen 时，它返回值 7，如果我执行 String.IsNullOrWhitespace，它返回 false.

In vb.net when I check the strlen of this string it returns a value of 7 and if i do a String.IsNullOrWhitespace it returns false.

我不明白这是为什么?我已将字符串拆分为一个字节数组，每个字节都是 0x0，即空/无.string = Nothing 比较也会失败.

I cannot understand why this is? I have split the string into a byte array and each byte is 0x0, which is null/nothing. A string = Nothing comparison also fails.

我希望能够用我自己的字符串替换此字符串，但我无法动态执行此操作.即使每个字节都是 0x0，为什么这个字符串返回长度为 7 的任何建议?

I want to be able to replace this string with a string of my own but I cannot do this dynamically. Any suggestions why this string returns a length of 7 even though each byte is 0x0?

推荐答案

Null 字符不是空格，并且您的字符串引用不是 Nothing，因此我希望 String.IsNullOrWhitespace() 返回假

The Null character is not whitespace, and your string reference is not Nothing, so I would expect String.IsNullOrWhitespace() to return false

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