C# 中的路径字符串连接问题
我想输出 D:\Learning\CS\Resource\Tutorial\C#LangTutorial 但无法工作。编译器错误错误CS0165：使用未分配的局部变量'StrPathHead 请给我一些关于如何纠正我的代码或针对我的案例的其他更好解决方案的建议。谢谢。
static void Main(string[] args)
{
string path = "D:\\Learning\\CS\\Resource\\Book\\C#InDepth";
int n = 0;
string[] words = path.Split('\\');
foreach (string word in words)
{
string StrPathHead;
string StrPath;
Console.WriteLine(word);
if (word == "Resource")
{
StrPath = StrPathHead + word + "\\Tutorial\\C#LangTutorial";
}
else
{
StrPathHead += words[n++] + "\\";
}
}
}
I want to output D:\Learning\CS\Resource\Tutorial\C#LangTutorial
But can't work. Compiler error error CS0165: Use of unassigned local variable 'StrPathHead
Please give me some advice about how to correct my code or other better solution for my case. Thank you.
static void Main(string[] args)
{
string path = "D:\\Learning\\CS\\Resource\\Book\\C#InDepth";
int n = 0;
string[] words = path.Split('\\');
foreach (string word in words)
{
string StrPathHead;
string StrPath;
Console.WriteLine(word);
if (word == "Resource")
{
StrPath = StrPathHead + word + "\\Tutorial\\C#LangTutorial";
}
else
{
StrPathHead += words[n++] + "\\";
}
}
}
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评论（2）
我同意 Mitch Wheat 的观点，但是你可以通过初始化
StrPathstring StrPath = string.Empty;来解决当前的问题，正如其他人所说，声明
StrPath> 在循环之外。来自 MSDN
I agree with Mitch Wheat, but you could solve your current problem initializating
StrPathstring StrPath = string.Empty;And as other people say, declare
StrPathoutside of the loop.From MSDN
将
StrPath初始化为空字符串 ("")并在循环外部声明它。您可能还需要考虑使用StringBuilder，因为 C# 中的String是不可变的。Initialize
StrPathto the empty string ("") and declare it outside your loop. You may also want to consider using aStringBuildersinceStrings in c# are immutable.