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分享Application.Run(new MainForm())弹出异常
我用C#编写一个收发数据的客户端程序，当客户端运行一段时间后，就弹出上图所示的异常，求各位大牛支招~~~
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threenewbee 2014-05-01
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代码不全，没有看到构造函数
137867312 2014-04-30
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namespace _IEC
{
partial class MainForm
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.btnClient = new System.Windows.Forms.Button();
this.btnServer = new System.Windows.Forms.Button();
this.btnExit = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// btnClient
//
this.btnClient.Location = new System.Drawing.Point(52, 29);
this.btnClient.Name = "btnClient";
this.btnClient.Size = new System.Drawing.Size(89, 32);
this.btnClient.TabIndex = 0;
this.btnClient.Text = "客户端模式";
this.btnClient.UseVisualStyleBackColor = true;
this.btnClient.Click += new System.EventHandler(this.btnClient_Click);
//
// btnServer
//
this.btnServer.Location = new System.Drawing.Point(52, 86);
this.btnServer.Name = "btnServer";
this.btnServer.Size = new System.Drawing.Size(89, 32);
this.btnServer.TabIndex = 1;
this.btnServer.Text = "服务器模式";
this.btnServer.UseVisualStyleBackColor = true;
this.btnServer.Click += new System.EventHandler(this.btnServer_Click);
//
// btnExit
//
this.btnExit.Location = new System.Drawing.Point(52, 143);
this.btnExit.Name = "btnExit";
this.btnExit.Size = new System.Drawing.Size(89, 32);
this.btnExit.TabIndex = 2;
this.btnExit.Text = "退出";
this.btnExit.UseVisualStyleBackColor = true;
this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
//
// MainForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(203, 210);
this.Controls.Add(this.btnExit);
this.Controls.Add(this.btnServer);
this.Controls.Add(this.btnClient);
this.Name = "MainForm";
this.Text = "请选择模式";
this.Load += new System.EventHandler(this.MainForm_Load);
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.Button btnClient;
private System.Windows.Forms.Button btnServer;
private System.Windows.Forms.Button btnExit;
}
}137867312 2014-04-30
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初学者，让大神们见笑了
137867312 2014-04-30
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不好意思，MainForm的代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace _IEC
{
public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();
}
private void MainForm_Load(object sender, EventArgs e)
{
}
private void btnClient_Click(object sender, EventArgs e)
{
ClientForm obj = new ClientForm();
obj.Show();
}
private void btnServer_Click(object sender, EventArgs e)
{
//ServerForm obj = new ServerForm();
//obj.Show();
}
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
於黾 2014-04-30
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MainForm报错,你贴ClientForm的代码...
threenewbee 2014-04-29
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贴错了，要MainForm的代码。
137867312 2014-04-29
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.IO;
namespace _IEC
{
public partial class ClientForm : Form
{
private byte[] PackageBuffer = new byte[4096];//定义一个数据缓冲包数组，即4K
private int PackageBufferLength = 0;//定义一个数据包长度的变量
private void ShowPackage()//显示报文
{
int i;
string content = "";
Color Color = rtb.SelectionColor;
SetTextColor(Color.Blue);
for (i = 0; i < (PackageBuffer[1] + 2); i++)
{
content += PackageBuffer[i].ToString("X2");
content += " ";
}
rtb.AppendText("收到的报文为:" + "\r\n" + content + "\r\n");
SetTextColor(Color);
}
public ClientForm()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}
private string data = null;
private delegate void HandleSaveText(string text); //定义委托，用于多线程保存文件
private HandleSaveText handleSave;
private bool isExit = false;
private TcpClient tcpclient;
private NetworkStream netStream;
private ManualResetEvent allDone = new ManualResetEvent(false);
private void Connect()
{
tcpclient = new TcpClient(AddressFamily.InterNetwork);
AsyncCallback RequestCallBack = new AsyncCallback(requestCallBack);
allDone.Reset();//将事件线程设置为非终止状态
tcpclient.BeginConnect(IPAddress.Parse(ServerIP.Text.Trim()), int.Parse(Port.Text.Trim()), requestCallBack, tcpclient);
allDone.WaitOne();
}
public class dataread
{
public NetworkStream netstream;
public byte[] PackageBuffer;
public dataread(NetworkStream ns, int buffersize)
{
this.netstream = ns;
this.PackageBuffer = new byte[buffersize];
}
}
private void requestCallBack(IAsyncResult ar)
{
allDone.Set();
tcpclient = (TcpClient)ar.AsyncState;
if (tcpclient.Connected)
{
txtState.Text = "连接服务器成功!";
}
else
{
txtState.Text = "连接服务器失败，请检查服务器地址或端口!";
}
}
private void SendCallback(IAsyncResult ar)
{
try
{
netStream.EndWrite(ar);
}
catch (Exception ex)
{
txtState.Text = ex.Message;
}
}
private void ReadCallBack(IAsyncResult ar)
{
try
{
int rec = netStream.EndRead(ar);
PackageBufferLength = PackageBuffer.Length;
ShowPackage();
netStream.BeginRead(PackageBuffer, 0, PackageBuffer.Length, new AsyncCallback(this.ReadCallBack), netStream);
}
catch (Exception ex)
{
txtState.Text = ex.Message;
}
}
private void connect_Click(object sender, EventArgs e)
{
try
{
Connect();
connect.Enabled = false;
Stopconnect.Enabled = true;
ServerIP.Enabled = false;
Port.Enabled = false;
}
catch (Exception ex)
{
txtState.Text = ex.Message;
}
}
public string byteToHexStr(byte[] bytes)//转化成16进制数
{
string returnStr = " ";
Color Color = rtb.SelectionColor;
SetTextColor(Color.Blue);
if (bytes != null)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr += bytes[i].ToString("X2");
if (((i + 1) % 6) == 0)
returnStr += " ";
}
}
return returnStr;
}
private void ClientForm_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
ServerIP.Text = "192.168.0.106";
Port.Text = "2404";
//ServergroupBox.Enabled = false;
ClientgroupBox.Enabled =true;
}
private void Stopconnect_Click(object sender, EventArgs e)
{
Stopconnect.Enabled = false;
connect.Enabled = true;
ServerIP.Enabled = true;
Port.Enabled = true;
tcpclient.Close();
txtState.Text = "已与服务器断开!";
}
rtb.AppendText("主站发送的报文为：" + "\r\n" + str + "\r\n");
dataread dr = new dataread(netStream, tcpclient.ReceiveBufferSize); //client.receivebuffersize接收缓冲区的大小
//开始接受数据
netStream.BeginRead(dr.PackageBuffer, 0, dr.PackageBuffer.Length, new AsyncCallback(ReadCallBack), dr);
}
}
}
threenewbee 2014-04-29
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起码你把构造函数的代码贴出来。
这要能看出来，那岂不见鬼了。
137867312 2014-04-29
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是什么原因导致的，我应该怎样修改？现行谢谢
threenewbee 2014-04-29
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MainForm构造函数中有一个变量为null。
