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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：
先声明，我不是这方面的专家，只是干软件四个月不知天有多高地有多硬的小孩子
首先，类型转换是有一定开销的
我试过这样的代码：这是一个控制台应用程序的Program类的代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace 类型转换的开销
{
class Program
......
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 ......
动态加载DLL需要使用Windows API函数：LoadLibrary、GetProcAddress以及FreeLibrary。我们可以使用DllImport在C#中使用这三个函数。
[DllImport("Kernel32")]
public static extern int GetProcAddress(int handle, String funcname);
[DllImport("Kernel32")]
public static extern int L ......
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
......
下面是我自己总结的一个比较简单的c#调用SQL Server 2005存储过程的小例子，主要是介绍整个过程，有问题的话请大虾们指导，谢谢~
作者：shinehoo
1）存储过程这样写的
ALTER PROCEDURE dbo.procShowLog
(
@StartTime datetime,
@EndTime datetime,
......
