多线程问题，敬请指教！
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using WatchCenter.DataAccess;
using WatchCenter.DataModel;
using System.Threading;
using mo=ESRI.MapObjects2.Core;
using System.IO;
using System.Diagnostics;
using DBConnSetup;
namespace WatchCenter
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class frmMain : System.Windows.Forms.Form
{
private System.Windows.Forms.ListView listView1;
private System.Windows.Forms.Splitter splitter1;
private System.Windows.Forms.Panel panel1;
private ESRI.MapObjects2.Core.AxMap axMap1;
private WatchCenterStatusAction wcsa;
private mo.Line lines;
private mo.Line fullextent;
private ArrayList lst;
private Thread t;
private MapCtrl mapctrl;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public frmMain()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
wcsa=new WatchCenterStatusAction();
mapctrl=new MapCtrl();
InitializeTrackingLayer();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (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()
{
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
try
{
string appPath = Application.StartupPath;
if(!File.Exists( "key.dat "))
{
frmDBConnect frm=new frmDBConnect();
frm.ShowDialog();
//Process process = new Process();
//process.StartInfo.FileName = "DBConnSetup.exe ";
//process.Start();
//process.WaitForInputIdle();
if(null!=frm.Tag)
{
File.Create(Application.StartupPath+ "\\key.dat ");
Application.Run(new frmMain());
}
else
{
Application.Exit();
}
}
else
{
Application.Run(new frmMain());
}
}
catch(Exception ee)
{
MessageBox.Show(ee.Message);
}
}
private void frmMain_Load(object sender, System.EventArgs e)
{
mapctrl.loadLayer(this.axMap1);
listView1.Columns.Add( "供电区域 ", 80, HorizontalAlignment.Left);
listView1.Columns.Add( "供电状态 ", 80, HorizontalAlignment.Left);
listView1.Columns.Add( "状态开始时间 ", 120, HorizontalAlignment.Left);
listView1.HeaderStyle=System.Windows.Forms.ColumnHeaderStyle.Clickable;
listView1.View=System.Windows.Forms.View.Details;
this.Show();
t = new Thread(new ThreadStart(Run));
t.Start();
Thread.Sleep(1000);
this.axMap1.Extent=FlashShape().Extent;
this.axMap1.CtlRefresh();
}
private void BuildListview()
{
bool flag=false;
lst=wcsa.GetALLWatchCenterStatusInfo();
this.listView1.Items.Clear();
ArrayList list=new ArrayList();
IEnumerator it=lst.GetEnumerator();
while(it.MoveNext())
{
WatchCenterStatus ws=(WatchCenterStatus)it.Current;
ListViewItem lvi=new ListViewItem();
lvi.Text=ws.CableNum;
if(!ws.CurrentlyStatus)
{
flag=true;
list.Add(ws.CableNum);
lvi.ForeColor=System.Drawing.Color.Red;
lvi.UseItemStyleForSubItems=true;
}
ListViewItem.ListViewSubItem lvsi=new ListViewItem.ListViewSubItem();
lvsi.Text=ws.CurrentlyStatus ? "正常供电 " : "断电 " ;
lvi.SubItems.Add(lvsi);
ListViewItem.ListViewSubItem lvsii=new ListViewItem.ListViewSubItem();
lvsii.Text=ws.BeginTime.ToString();
lvi.SubItems.Add(lvsii);
this.listView1.Items.Add(lvi);
}
this.listView1.Refresh();
if(!flag)
{
fullextent=FlashShape();
lines=null;
}
else
{
lines=FlashShape((string)list[0]);
for(int i=1;i <list.Count;i++)
{
lines=(mo.Line)lines.Union(FlashShape((string)list[i]),this.axMap1.FullExtent);
}
}
this.BeginInvoke(new MethodInvoker(UpdateUI));
}
//this.axMap1.Extent=lines.Extent;
//this.axMap1.FlashShape(lines,10);
// This method will update ui element
private void UpdateUI()
{
this.axMap1.TrackingLayer.ClearEvents();
if(null!=lines)
{
this.axMap1.Extent=lines.Extent;
this.axMap1.Refresh();
this.axMap1.FlashShape(this.lines,18);
this.axMap1.TrackingLayer.AddEvent(this.lines,1);
}
else
{
this.axMap1.Extent=fullextent.Extent;
this.axMap1.Refresh();
}
}
private mo.Line FlashShape(string cablename)
{
mo.MapLayer layer=(mo.MapLayer)(this.axMap1.Layers.Item( "触线网线层 "));
mo.Line lines=null;
if(null!=layer)
{
mo.Recordset record=layer.SearchExpression( "电缆编号= ' "+cablename+ " ' ");
if(!record.EOF)
{
lines=(mo.Line)(record.Fields.Item( "shape ").Value);
record.MoveNext();
while(!record.EOF)
{
mo.Line subline=(mo.Line)(record.Fields.Item( "shape ").Value);
lines=(mo.Line)(lines.Union(subline,this.axMap1.FullExtent));
record.MoveNext();
}
}
}
return lines;
}
private mo.Line FlashShape()
{
mo.MapLayer layer=(mo.MapLayer)(this.axMap1.Layers.Item( "触线网线层 "));
mo.Line lines=null;
if(null!=layer)
{
mo.Recordset record=layer.Records;
if(!record.EOF)
{
lines=(mo.Line)(record.Fields.Item( "shape ").Value);
record.MoveNext();
while(!record.EOF)
{
mo.Line subline=(mo.Line)(record.Fields.Item( "shape ").Value);
lines=(mo.Line)(lines.Union(subline,this.axMap1.FullExtent));
record.MoveNext();
}
}
}
return lines;
}
private void listView1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
//ListViewItem lvi=this.listView1.GetItemAt(e.X,e.Y);
//if(null!=lvi)
//{
//t.Suspend();
//}
}
private void Run()
{
while(true)
{
BuildListview();
Thread.Sleep(3000);
}
}
private void frmMain_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
t.Abort();
Application.ExitThread();
}
}
}
t = new Thread(new ThreadStart(Run));
t.Start();
此线程是否为工作线程？如果是为什么它可以访问BuildListview()中的代码？尤其是不通过Contrl.invoke方法就可以访问UI控件listview1？谢谢！
[解决办法]
太长了，
[解决办法]
lz：
你把问题描述清楚一点，代码太长了，你只要把出问题的几行贴出来就行了。这么长，考验人的耐心啊。。。。。
[解决办法]
t = new Thread(new ThreadStart(Run));
t.Start();
此线程是否为工作线程？如果是为什么它可以访问BuildListview()中的代码？尤其是不通过Contrl.invoke方法就可以访问UI控件listview1？谢谢！
t是工作线程
你用的是VS2003的话就可以。你用的2005的话现在就不可以。
若用2005，除了你说的invoke+委托外，还可以设置项目的Form.CheckForIllegalCrossThreadCalls = false;
[解决办法]
以上所说的可以和不可以都是指是否可以访问窗体控件。
[解决办法]
Listview1是在buildlistview()中生成的，属于t线程
[解决办法]
用Contrl.invoke方法才是最好的,也是最安全的..
