如何连接字符串-我知道这并不难！ [英] How to concatenate strings -I know it's not that hard!

问题描述

我必须处理一个wannabe XML字符串.
它没有根元素(由于未知原因)，但是我对此无能为力.

因此，我决定在整个XML上粘贴一个虚拟的根节点，然后将其馈入XMLDocument.

有问题的XML如下:

I have to process a wannabe XML string.
It hasn''t got a root element (for reasons unknown), but I can''t do much about it.

So I decided to stick a dummy root node around the entire XML and then feed it into the XMLDocument.

The XML in question looks like:

<mynode>
   blah
   <morenodes>
     blah
     blah
   </morenodes>
</mynode>
   blah
   <morenodes>
     blah
     blah
   </morenodes>

...

所以为了作弊，我决定去做

So to cheat, I decided to do

<root>
   <mynode>
     blah
     <morenodes>
       blah
       blah
     </morenodes>
   </mynode>
   <mynode>
     blah
     <morenodes>
       blah
       blah
     </morenodes>
   </mynode>
...
</root>

认为这很简单，我做到了

Thinking this is fairly straight forward, I did

string newString = "<root>" + oldString + "</root>";
XMLDocument xmlDolcument = new XMLDocument();
xmlDocument.Load(newString);

oldString是找到原始XML的位置.

由于某些原因，< Root>标记添加成功，但</Root>拒绝添加任何我尝试的内容.
字符串连接有什么难处，我该怎么办呢，这太可怕了吗?

请帮忙！

格式错误，结尾标记消失了.

where oldString is where the original XML is found.

For some reason, the <Root> tag gets added OK, but the </Root> refuses to be added whatever I try.
What''s so hard about string concatenation, and what am I doing that''s so horribly wrong?

Please help!

Formatting went wrong and the ending tag disappeared...

推荐答案

您的代码(即使我查看了问题的原始来源)也没有添加结束标签！
试试:

Your code (even if I view the raw source of your question) doesn''t add the ending tag!
Try:

string newString = "<root>" + oldString + "</root>";
XMLDocument xmlDolcument = new XMLDocument();
xmlDocument.Load(newString);

请注意，字符串是不可变的，因此，如果您有多个"+"操作，则每次都会一次又一次地复制整个字符串.

首选System.Text.StringBuilder.Append.如果要连接静态固定数量的字符串(而不是循环)，请使用string.Format.

—SA

Be careful, remember, strings are immutable, so if you have several "+" operations, whole string is copied again and again every time.

Prefer System.Text.StringBuilder.Append. If you want to concatenate statically fixed number of strings (not a loop), prefer string.Format.

—SA

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