未处理 System.AccessViolationException Message:尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

[南宫萧尘]

今天把公司一个winform的程序移植到web上面，因为有些数据，通过软件麻烦，直接web展示方便，没想到出现这种情况，各位帮小弟看看到底是哪里出错了：
先贴上winform的代码：
这个是类文件：RDCAPI.cs
代码：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Globalization;
using YD_EMS;
using System.Net.Sockets;
using System.Net;
using System.Text;

// 实时数据回传  回调函数
public delegate int RDC_VarOk(
                                IntPtr handle,
                                string lpszDbVarName,
                                string lpszVal,
                                string lpszdateTime,
                                int dwUserData //  
                                );

namespace YD_EMS
{
    public partial class testApi : System.Web.UI.Page
    {
        IntPtr m_handle;//句柄

        string strIP = "127.0.0.1"; //访问IP

        int nPort = 8109;  //端口


        
        protected void Page_Load(object sender, EventArgs e)
        {
           

        }
        
        private int GetData(IntPtr handle,
                               string lpszDbVarName,
                               string lpszVal,
                               string lpszdateTime,
                               int dwUserData)
           
        {
          if (lpszDbVarName == "d.test1")
                test1.Text = lpszVal;

            if (lpszDbVarName == "d.test2")
                test2.Text = lpszVal;

            if (lpszDbVarName == "d.test3")
                test3.Text = lpszVal;


            return 0;
        }
     
        protected void Timer1_Tick(object sender, EventArgs e)
        {
            //此段拿来测试页面刷新的，可以忽略。
            string str = DateTime.Now.ToString("tt") == "上午" ? "AM" : "PM";
            lblTime.Text = "当前时间为:" + DateTime.Now.ToString("yyyy年MM月dd日") + "   " +
                 CultureInfo.GetCultureInfo("zh-cn").DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek) + "   " +
                 DateTime.Now.ToLongTimeString() + "   " + str;
            
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            RDC_VarOk myCallBack = new RDC_VarOk(GetData);
            m_handle = App_Code.RDCAPI.RDC_Open(strIP, nPort, myCallBack, 0);// 打开数据连接
            App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test1", 2);//增加标签
            App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test2", 2);//增加标签
            App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test3", 2);//增加标签
            int n = App_Code.RDCAPI.RDC_StartRun(m_handle);
        }

        //**********************
        // 连接
        //**********************
        private static Socket ConnectSocket(string server, int port)
        {
            Socket socket = null;

            IPHostEntry iphostentry = null;

            foreach (IPAddress address in iphostentry.AddressList)
            {

                IPEndPoint IPEPoint = new IPEndPoint(address, port);

                Socket newSocket = new Socket(IPEPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

                newSocket.Connect(IPEPoint);

                if (newSocket.Connected)
                {
                    socket = newSocket;
                    break;
                }
                else
                {
                    continue;
                }

            }
            return socket;
        }

        //**********************
        // 发送与接收
        //**********************

        private static string SocketSendReceive(string server, int port)
        {
            string request = "get var name";

            Byte[] btSend = Encoding.ASCII.GetBytes(request);

            Byte[] btReceived = new Byte[256];

            Socket socket = ConnectSocket(server, port);

            if (socket == null)
                return ("连接失败");

            socket.Send(btSend, btSend.Length, 0);

            int intContent = 0;

            string strContent = "";

            do
            {
                intContent = socket.Receive(btReceived, btReceived.Length, 0);

                strContent += Encoding.ASCII.GetString(btReceived, 0, intContent);

            }
            while (intContent > 0);

            return strContent;

        }

    }
}

winform窗口文件：Form1.cs
代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net;
using System.Runtime.InteropServices;
using System.IO;

// 实时数据回传  回调函数
public delegate int RDC_VarOk(
                                IntPtr handle,
                                string lpszDbVarName,
                                string lpszVal,
                                string lpszdateTime,
                                int dwUserData //  
                                );

namespace WindowsFormsApplication6
{

    public partial class Form1 : Form
    {



        IntPtr m_handle;

        string strIP = "127.0.0.1";

        int nPort = 8109;

        public Form1()
        {
            InitializeComponent();

        }
        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            WindowsFormsApplication6.dll.RDCAPI.RDC_StopRun(m_handle);
            WindowsFormsApplication6.dll.RDCAPI.RDC_Close(m_handle);
        }

        private void button6_Click(object sender, EventArgs e)//点击开始自动更新数据
        {


            RDC_VarOk myCallBack = new RDC_VarOk(GetData);

            m_handle = WindowsFormsApplication6.dll.RDCAPI.RDC_Open(strIP, nPort, myCallBack, 0);


            WindowsFormsApplication6.dll.RDCAPI.RDC_AddVar(m_handle, "d.test1", 2);
            WindowsFormsApplication6.dll.RDCAPI.RDC_AddVar(m_handle, "d.test2", 2);
            WindowsFormsApplication6.dll.RDCAPI.RDC_AddVar(m_handle, "d.test3", 2);

            int n = WindowsFormsApplication6.dll.RDCAPI.RDC_StartRun(m_handle);

        }
        private int GetData(IntPtr handle,
                                string lpszDbVarName,
                                string lpszVal,
                                string lpszdateTime,
                                int dwUserData)
        {
            if (lpszDbVarName == "d.test1")
            textBox1.Text = lpszVal;

            if (lpszDbVarName == "d.test2")
             textBox2.Text = lpszVal;

            if (lpszDbVarName == "d.test3")
                textBox3.Text = lpszVal;


            return 0;

        }
        
        }
        
     }

//**********************
// 连接
//**********************
        private static Socket ConnectSocket(string server, int port)
        {
            Socket socket = null;

            IPHostEntry iphostentry = null;

            foreach (IPAddress address in iphostentry.AddressList)
            {

                IPEndPoint IPEPoint = new IPEndPoint(address,port);

                Socket newSocket = new Socket(IPEPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

                newSocket.Connect(IPEPoint);

                if (newSocket.Connected)
                {
                    socket = newSocket;
                    break;
                }
                else
                {
                    continue;
                }


               

            }
            return socket;
        }

//**********************
// 发送与接收
//**********************

            private static string SocketSendReceive(string server,int port)
            {
                string request="get var name";

                Byte[] btSend=Encoding.ASCII.GetBytes(request);

                Byte[] btReceived =new Byte[256];

                Socket socket=ConnectSocket(server,port);

                if(socket==null)
                   return ("连接失败");

                socket.Send(btSend,btSend.Length,0);

                int intContent=0;

                string strContent="";

                do
                {
                    intContent =socket.Receive(btReceived,btReceived.Length,0);

                    strContent+=Encoding.ASCII.GetString(btReceived,0,intContent);

                }
                while(intContent>0);

                return strContent;

            }

                  
    }
}

以上的在winform的项目里面运行至正常的

下面是我移植到web上面的时候的代码，其中类文件RDCAPI.cs不变，代码也一样；

这个是web页面名称：testApi.aspx
页面代码（采用页面无刷新效果，因为采集的数据是实时更新的，需要定时刷新）：
由于字数限制，我把代码贴在一楼

DeBug项目的时候，报错如下：
未处理 System.AccessViolationException
Message: 尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

[南宫萧尘]

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="testApi.aspx.cs" Inherits="YD_EMS.testApi" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">

function pageLoad() {
}

</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="test1"></asp:Label>
<asp:Label ID="test1" runat="server" Text="Label"></asp:Label>
<br />
<asp:Label ID="Label3" runat="server" Text="test2"></asp:Label>
<asp:Label ID="test2" runat="server" Text="Label"></asp:Label>
<br />
<asp:Label ID="Label5" runat="server" Text="test3"></asp:Label>
<asp:Label ID="test3" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="更新数据" />
<br />
<asp:Label ID="Label6" runat="server" Text="测试时间"></asp:Label>
<asp:Label ID="lblTime" runat="server" Text="testTime"></asp:Label>
<asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">
</asp:Timer>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>

[南宫萧尘]

这里是CS文件的代码：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Globalization;
using YD_EMS;
using System.Net.Sockets;
using System.Net;
using System.Text;




// 实时数据回传 回调函数
public delegate int RDC_VarOk(
IntPtr handle,
string lpszDbVarName,
string lpszVal,
string lpszdateTime,
int dwUserData //
);


namespace YD_EMS
{
public partial class testApi : System.Web.UI.Page
{
IntPtr m_handle;//句柄

string strIP = "127.0.0.1"; //访问IP

int nPort = 8109; //端口



protected void Page_Load(object sender, EventArgs e)
{


}



private int GetData(IntPtr handle,
string lpszDbVarName,
string lpszVal,
string lpszdateTime,
int dwUserData)

{


if (lpszDbVarName == "d.test1")
test1.Text = lpszVal;

if (lpszDbVarName == "d.test2")
test2.Text = lpszVal;

if (lpszDbVarName == "d.test3")
test3.Text = lpszVal;


return 0;
}

protected void Timer1_Tick(object sender, EventArgs e)
{
//此段拿来测试页面刷新的，可以忽略。
string str = DateTime.Now.ToString("tt") == "上午" ? "AM" : "PM";
lblTime.Text = "当前时间为:" + DateTime.Now.ToString("yyyy年MM月dd日") + "   " +
CultureInfo.GetCultureInfo("zh-cn").DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek) + "   " +
DateTime.Now.ToLongTimeString() + "   " + str;

}

protected void Button1_Click(object sender, EventArgs e)
{
RDC_VarOk myCallBack = new RDC_VarOk(GetData);
m_handle = App_Code.RDCAPI.RDC_Open(strIP, nPort, myCallBack, 0);// 打开数据连接
App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test1", 2);//增加标签
App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test2", 2);//增加标签
App_Code.RDCAPI.RDC_AddVar(m_handle, "d,test3", 2);//增加标签
int n = App_Code.RDCAPI.RDC_StartRun(m_handle);
}

//**********************
// 连接
//**********************
private static Socket ConnectSocket(string server, int port)
{
Socket socket = null;

IPHostEntry iphostentry = null;

foreach (IPAddress address in iphostentry.AddressList)
{

IPEndPoint IPEPoint = new IPEndPoint(address, port);

Socket newSocket = new Socket(IPEPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

newSocket.Connect(IPEPoint);

if (newSocket.Connected)
{
socket = newSocket;
break;
}
else
{
continue;
}

}
return socket;
}

//**********************
// 发送与接收
//**********************

private static string SocketSendReceive(string server, int port)
{
string request = "get var name";

Byte[] btSend = Encoding.ASCII.GetBytes(request);

Byte[] btReceived = new Byte[256];

Socket socket = ConnectSocket(server, port);

if (socket == null)
return ("连接失败");

socket.Send(btSend, btSend.Length, 0);

int intContent = 0;

string strContent = "";

do
{
intContent = socket.Receive(btReceived, btReceived.Length, 0);

strContent += Encoding.ASCII.GetString(btReceived, 0, intContent);

}
while (intContent > 0);

return strContent;

}

}
}

[南宫萧尘]

都没有人理我的？

[cl2636026900]

你牛，写这么多谁会逐句看