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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
......
你首先要理解一下概念：
一 类型(Type) 对象是什么
比如 object x; x是对象，object就是它的类型，在程序中如何描述类型这个概念呢？
就是Type(System.Type)。要获取某个类的类型可以用typeof()操作符
object a;object b; DataTable t;
aType = typeof(object);Type bType = typeof(object);tType = typ ......
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 ......
1 创建C# DLL，需要指定应用类型为“类库”，代码：
namespace CSLib
{
public class Class1
{
private string name;
public string Name
......
下面是我总结出来的一个数据库访问公共类，基于ADO.NET，C#的，其中，以重载的方式实现使用存属过程的接口和不用存储过程的接口，如有不妥请大家指正，谢谢~
作者：shinehoo
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
namespace shineh ......
