将 .NET GZipStream 类与 Mono 结合使用

发布于 2024-11-07 02:16:13 字数 1155 浏览 3 评论 0原文

我正在尝试从 GZipStream 类。使用命令 gmcs gzip.cs，我收到错误消息。 gzip.cs 与 msdn 的来源相同。

看来编译的时候需要添加引用。缺少什么？

gzip.cs(57,32): error CS1061: Type `System.IO.FileStream' does not contain a definition for `CopyTo' and no extension method `CopyTo' of type `System.IO.FileStream' could be found (are you missing a using directive or an assembly reference?)
/Library/Frameworks/Mono.framework/Versions/2.10.1/lib/mono/2.0/mscorlib.dll (Location of the symbol related to previous error)
gzip.cs(86,40): error CS1061: Type `System.IO.Compression.GZipStream' does not contain a definition for `CopyTo' and no extension method `CopyTo' of type `System.IO.Compression.GZipStream' could be found (are you missing a using directive or an assembly reference?)
/Library/Frameworks/Mono.framework/Versions/2.10.1/lib/mono/gac/System/2.0.0.0__b77a5c561934e089/System.dll (Location of the symbol related to previous error)
Compilation failed: 2 error(s), 0 warnings

已解决

我应该使用“dmcs”，而不是“gmcs”才能使用 .NET 4 功能。

原文

I'm trying to build an example from GZipStream Class. With the command gmcs gzip.cs, I got error messages. gzip.cs is the same source from the msdn.

It seems that I need to add reference when compiling. What's missing?

gzip.cs(57,32): error CS1061: Type `System.IO.FileStream' does not contain a definition for `CopyTo' and no extension method `CopyTo' of type `System.IO.FileStream' could be found (are you missing a using directive or an assembly reference?)
/Library/Frameworks/Mono.framework/Versions/2.10.1/lib/mono/2.0/mscorlib.dll (Location of the symbol related to previous error)
gzip.cs(86,40): error CS1061: Type `System.IO.Compression.GZipStream' does not contain a definition for `CopyTo' and no extension method `CopyTo' of type `System.IO.Compression.GZipStream' could be found (are you missing a using directive or an assembly reference?)
/Library/Frameworks/Mono.framework/Versions/2.10.1/lib/mono/gac/System/2.0.0.0__b77a5c561934e089/System.dll (Location of the symbol related to previous error)
Compilation failed: 2 error(s), 0 warnings

SOLVED

I should use 'dmcs', not 'gmcs' in order to use .NET 4 functions.

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欢烬 2024-11-14 02:16:13

Stream.CopyTo 仅在 .NET 4 中出现 - 它可能还没有在 Mono 中（或者您可能需要更新的版本）。

不过，编写类似的扩展方法很容易：

public static class StreamExtensions
{
    public static void CopyTo(this Stream input, Stream output)
    {
        byte[] buffer = new byte[16 * 1024];
        int bytesRead;
        while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0)
        {
            output.Write(buffer, 0, bytesRead);
        }
    }
}

Stream.CopyTo only arrived in .NET 4 - it may not be in Mono yet (or perhaps you need a more recent version).

It's easy to write a similar extension method though:

public static class StreamExtensions
{
    public static void CopyTo(this Stream input, Stream output)
    {
        byte[] buffer = new byte[16 * 1024];
        int bytesRead;
        while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0)
        {
            output.Write(buffer, 0, bytesRead);
        }
    }
}

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