如何声明一个庞大的字节数组 [英] How to declare a pointerto an array of bytes
问题描述
我试图从C＃程序调用VerQueryValue。 VerQueryValue将其作为其参数之一的指针指向一个指向字节数组的指针，它使用
来返回指向所需数组的指针。现在，我可以这样称呼：
byte * lpBuffer;
int length;
string subBlock = @" \StringFileInfo \\ \\" + langCodePage +
@" \FileDescription" ;;
result = VerQueryValue（buffer，subBlock，& lpBuffer，& length）;
然后我没有一个byte []传递给ASCIEncoding对象进行解码。
我真正想做的是声明
byte [] * lplpBuffer
然后将其传递给VerQueryValue，但C＃显然不允许这样做。
（奇怪的是，如果我宣布
字节[] lpBuffer;
我收到错误无法从byte [] *转换为字节**，这很奇怪如果
它无法识别字节[] *作为一种类型无论如何）
任何人都可以放弃任何光线吗？
-
Dave
I am trying to call VerQueryValue from a C# program. VerQueryValue takes as
one of its parameters a pointer to a pointer to an array of bytes, which it
uses to return a pointer to the required array. Now, I can call it like this:
byte* lpBuffer;
int length;
string subBlock = @"\StringFileInfo\" + langCodePage +
@"\FileDescription";
result = VerQueryValue(buffer, subBlock, &lpBuffer, &length);
but then I don''t have a byte[] to pass to an ASCIEncoding object to decode.
What I really want to do is declare
byte[]* lplpBuffer
and then pass that to VerQueryValue, but C# apparently won''t allow that.
(Oddly enough if I declare
byte[] lpBuffer;
I get an error "cannot convert from byte[]* to byte**", which is peculiar if
it doesn''t recognise byte[]* as a type anyway)
Can anyone shed any light?
--
Dave
推荐答案
" Dave" <沓** @ discussions.microsoft.com>在消息中写道
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"Dave" <Da**@discussions.microsoft.com> wrote in message
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我试图从C＃程序调用VerQueryValue。 VerQueryValue将其作为其参数之一的指针指向指向字节数组的指针，该指针用于返回指向所需数组的指针。现在，我可以称之为
这个：
byte * lpBuffer;
int length;
string subBlock = @" \StringFileInfo \" + langCodePage +
@" \FileDescription" ;;
result = VerQueryValue（buffer，subBlock，& lpBuffer，& length）;
但是我没有一个字节[]传递给ASCIEncoding对象进行解码。
我真正要做的是声明
byte [] * lplpBuffer
然后将它传递给VerQueryValue，但C＃显然不允许这样。
（奇怪的是，如果我声明
byte [] lpBuffer;
我收到错误无法从byte [] *转换为byte **，这是奇特的
如果
它无法识别byte [] *作为一种类型）
任何人都可以放弃任何光线吗？
-
戴夫
I am trying to call VerQueryValue from a C# program. VerQueryValue takes as
one of its parameters a pointer to a pointer to an array of bytes, which
it
uses to return a pointer to the required array. Now, I can call it like
this:
byte* lpBuffer;
int length;
string subBlock = @"\StringFileInfo\" + langCodePage +
@"\FileDescription";
result = VerQueryValue(buffer, subBlock, &lpBuffer, &length);
but then I don''t have a byte[] to pass to an ASCIEncoding object to
decode.
What I really want to do is declare
byte[]* lplpBuffer
and then pass that to VerQueryValue, but C# apparently won''t allow that.
(Oddly enough if I declare
byte[] lpBuffer;
I get an error "cannot convert from byte[]* to byte**", which is peculiar
if
it doesn''t recognise byte[]* as a type anyway)
Can anyone shed any light?
--
Dave
无需使用指针，通过引用传递byte []：
byte [] lpBuffer;
VerQueryValue（....，ref lpBuffer，...）;
Willy。
No need to use pointers, pass the byte[] by reference:
byte[] lpBuffer;
VerQueryValue(...., ref lpBuffer,...);
Willy.
''Fraid不！这使得无法从''转换字节[]''转换为''字节**''
-
戴夫
Willy Denoyette [MVP]"写道：
''Fraid not! That gives "cannot convert from ''ref byte[]'' to ''byte**''
--
Dave
"Willy Denoyette [MVP]" wrote:
戴夫 <沓** @ discussions.microsoft.com>在消息中写道
新闻：E9 ********************************** @ microsof t.com。 ..
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:E9**********************************@microsof t.com...
我试图从C＃程序调用VerQueryValue。 VerQueryValue将其作为其参数之一的指针指向指向字节数组的指针，该指针用于返回指向所需数组的指针。现在，我可以称之为
这个：
byte * lpBuffer;
int length;
string subBlock = @" \StringFileInfo \" + langCodePage +
@" \FileDescription" ;;
result = VerQueryValue（buffer，subBlock，& lpBuffer，& length）;
但是我没有一个字节[]传递给ASCIEncoding对象进行解码。
我真正要做的是声明
byte [] * lplpBuffer
然后将它传递给VerQueryValue，但C＃显然不允许这样。
（奇怪的是，如果我声明
byte [] lpBuffer;
我收到错误无法从byte [] *转换为byte **，这是奇特的
如果
它无法识别byte [] *作为一种类型）
任何人都可以放弃任何光线吗？
-
戴夫
I am trying to call VerQueryValue from a C# program. VerQueryValue takes as
one of its parameters a pointer to a pointer to an array of bytes, which
it
uses to return a pointer to the required array. Now, I can call it like
this:
byte* lpBuffer;
int length;
string subBlock = @"\StringFileInfo\" + langCodePage +
@"\FileDescription";
result = VerQueryValue(buffer, subBlock, &lpBuffer, &length);
but then I don''t have a byte[] to pass to an ASCIEncoding object to
decode.
What I really want to do is declare
byte[]* lplpBuffer
and then pass that to VerQueryValue, but C# apparently won''t allow that.
(Oddly enough if I declare
byte[] lpBuffer;
I get an error "cannot convert from byte[]* to byte**", which is peculiar
if
it doesn''t recognise byte[]* as a type anyway)
Can anyone shed any light?
--
Dave
不需要使用指针，通过引用传递byte []：
byte [] lpBuffer;
VerQueryValue（....，ref lpBuffer ，...）;
威利。
No need to use pointers, pass the byte[] by reference:
byte[] lpBuffer;
VerQueryValue(...., ref lpBuffer,...);
Willy.
" Dave" ; <沓** @ discussions.microsoft.com>在留言中写道
新闻：1F ********************************** @ microsof t.com ...
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:1F**********************************@microsof t.com...
''没有！这使得无法从''转换字节[]''转换为''字节**''
-
''Fraid not! That gives "cannot convert from ''ref byte[]'' to ''byte**''
--
你如何拥有声明的功能？
David
How do you have the function declared?
David
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