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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：
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 ......
1. 简述 private、 protected、 public、 internal 修饰符的访问权限。
答 . private : 私有成员, 在类的内部才可以访问。
protected : 保护成员，该类内部和继承类中可以访问。
public : 公共成员，完全公开，没有访问限制。
internal: 在同一命名空间内可以访问。
2 .列举ASP.N ......
服务器端代码
控件：btnStart_Click，btnSend_Click，label4，textBox1
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.Threading;
using S ......
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 ......
