Developer Support Languages VC++, C# and VB.NET
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Troubleshooting PInvoke Related Issues
I am back with some more PInvoke Stuff. Recently I was working on a PInvoke issue which I found interesting.
I have a C++ dll which has a function whose signature is
int TestFunc(IN_STRUCT in_Params, RET_STRUCT * pret_Par).
I wanted to call this function from C#. Function has two arguments. First argument is input structure which will be filled from C# code and passed to C++ code. Second argument is output structure which is filled in C++ code and output to C# code.
Here are the C struct definitions and a function that needs to be marshaled
#include "stdafx.h"
#include <stdio.h>
#include "Objbase.h"
#include <malloc.h>
typedef struct IN_STRUCT
{
BYTE CMD_PType;
BYTE CMD_PTType;
BYTE CMD_OC;
BYTE CMD_Seq;
};
typedef struct RET_STRUCT
{
BYTE RET_OC;
BYTE RET_Seq;
BYTE RET_RetBytes;
char *str;
BYTE RET_PD[10];
};
extern "C" __declspec(dllexport) \
int TestFunc(IN_STRUCT in_Params, RET_STRUCT * pret_Par)
{
int iRet = 0;
pret_Par->RET_OC = in_Params.CMD_OC;
pret_Par-
相关文档：
关于使用到了两个C#关键字this和base。
1，C# "this " keyword
其作用引用类的当前实例，其实看了下面这个例子就好理解了。
主要三个作用：当前实例、参数传递和索引器
1.1 当前实例
class Team
{
///成员变量
private string name;
///构造函数
......
方法一：遍历正在有相同名字运行的例程
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace DHPSS.COM
{
/// <summary>
/// c#程序只运行一次，C#例程只运行一次
/// http://blog.csdn.net/nnsw ......
一．类与结构的示例比较：
结构示例：
public struct Person
{
string Name;
int height;
int weight
public bool overWeight()
{
//implement something
}
}
类示例：
public class TestTime
{
int hours;
int minutes;
int seconds;
public void passtime()
{
//implementation ......
c#编程基础之二：特性 这里的特性区别于属性，虽然msdn中似乎并没有区别二者。
属性：是面向对象编程的基本概念，提供了对私有字段的访问封装，在C#中以get和set访问器方法实现对可读可写属性的操作，提供了安全和灵活的数据访问封装。
特性：公共语言运行时允许添加类似关键字的描述声明，叫做attributes, 它对程序中的� ......
1. new有几种用法
3种 实例对象 方法隐藏
2.如何把一个array复制到arrayList里
foreach( object o in array )arrayList.Add(o);
3.datagrid.datasouse可以连接什么数据源
数据集DataSet
4.概述反射和序列化
动态获得 ......
