如何在 C# 中使用 StreamReader（新手）
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How to use StreamReader in C# (newbie)
提问by Jim
I'm trying to read the contents of a text file, in this case a list of computer names (Computer1, computer2 etc,) and I thought that StreamReader would be what you would use but when I do the following:
我正在尝试读取文本文件的内容，在这种情况下是计算机名称列表（Computer1、computer2 等），我认为 StreamReader 将是您将使用的内容，但是当我执行以下操作时：
StreamReader arrComputer = new StreamReader(FileDialog.filename)();
I got this exception:
我得到了这个例外：
The type or namespace name 'StreamReader' could not be found (are you missing a using directive or an assembly reference?)
I'm very new to C# so I'm sure I'm making a newbie mistake.
我对 C# 很陌生，所以我确定我犯了一个新手错误。
采纳答案by Kent Boogaart
You need to import the System.IOnamespace. Put this at the top of your .cs file:
您需要导入System.IO命名空间。将其放在 .cs 文件的顶部：
using System.IO;
Either that, or explicitly qualify the type name:
要么，要么明确限定类型名称：
System.IO.StreamReader arrComputer = new System.IO.StreamReader(FileDialog.filename);
回答by Steven A. Lowe
try
尝试
using System.IO;
StreamReader arrComputer = new StreamReader(FileDialog.filename);
回答by Werg38
Make sure you include using System.IOin the usings declaration
确保包含using System.IO在 using 声明中
回答by Gene
Make sure you are have "using System.IO;" at the top of your module. Also, you don't need the extra parenthesis at the end of "new StreamReader(FileDialog.filename)".
确保你有“使用 System.IO;” 在模块的顶部。此外，您不需要“new StreamReader(FileDialog.filename)”末尾的额外括号。
回答by CheGueVerra
Make sure you have the System assembly in your reference of the project and add this to the using part:
确保您在项目的参考中有系统程序集并将其添加到使用部分：
using System.IO;
回答by Eric W
StreamReader is defined in System.IO. You either need to add
StreamReader 在 System.IO 中定义。你要么需要添加
using System.IO;
using System.IO;
to the file or change your code to:
到文件或将您的代码更改为：
System.IO.StreamReader arrComputer = new System.IO.StreamReader(FileDialog.filename);
回答by Quibblesome
You'll need:
你需要：
using System.IO;
At the top of the .cs file. If you're reading text content I recommend you use a TextReader which is bizarrely a base class of StreamReader.
在 .cs 文件的顶部。如果您正在阅读文本内容，我建议您使用 TextReader，它奇怪地是 StreamReader 的基类。
try:
尝试：
using(TextReader reader = new StreamReader(/* your args */))
{
}
The using block just makes sure it's disposed of properly.
using 块只是确保它被正确处理。
回答by DCNYAM
You need to add a reference to the System.IO assembly. You can do this via the "My Project" properties page under the References tab.
您需要添加对 System.IO 程序集的引用。您可以通过“参考”选项卡下的“我的项目”属性页面执行此操作。
