字符串和指针转换

字符串转指针

Marshal

引用using System.Runtime.InteropServices;，具体查看C++提供的字符集编码

using System.Runtime.InteropServices;

var str = "Hello World";
var strPtr=Marshal.StringToHGlobalUni(str);

Marshal.Copy

using System.Runtime.InteropServices;
var str = "Hello World\0";

var byteStr = Encoding.Unicode.GetBytes(str);
IntPtr strPtr = Marshal.AllocHGlobal(byteStr.Length);
Marshal.Copy(byteStr, 0, strPtr, byteStr.Length);

指针转字符串

Marshal.PtrToStringUni

using System.Runtime.InteropServices;

var str = "Hello World";
var strPtr=Marshal.StringToHGlobalUni(str);
var readStr = Marshal.PtrToStringUni(strPtr);
Console.WriteLine(readStr)

Encoding

using System.Runtime.InteropServices;

var str = "Hello World";
var strPtr=Marshal.StringToHGlobalUni(str);

byte[] bytes = new byte[22];
Marshal.Copy(strPtr, bytes, 0, 22);
var readStr = Encoding.Unicode.GetString(bytes);
Console.WriteLine(readStr)

同理，其他类型也可以通过Marshal.Copy进行二进制编码转换