// 开始扫描列表页中内容
private void StartSingleScan(BaseRule rule)
{
rule.SiteScanBegin += ShowBeginScan;
rule.PageScanComplete += ShowProcess;
rule.SiteScanComplete += ShowCompleteInfo;
rule.PrepareScan();
}
// 显示扫描的进度
private void ShowProcess(object sender, BaseRule.ScanCompleteEventArgs e)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new BaseRule.PageScanCompleteEventHandler(ShowProcess), new object[] { null, e });
}
else
{
int process = int.Parse(beiProcess.EditValue.ToString());
beiProcess.EditValue = (++process);
beiStatus.Caption = string.Format(@"[{2}]正在扫描...,一共{0}页, {1}页已扫描.", e.web.MaxPage, process, e.web.Name);
}
}
// 扫描完成后的显示处理
private void ShowCompleteInfo(object sender, BaseRule.ScanCompleteEventArgs e)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new BaseRule.SiteScanCompleteEventHandle(ShowCompleteInfo), new object[] { null, e });
}
else
{
beiProcess.Visibility = DevExpress.XtraBars.BarItemVisibility.Never; // 不显示进度条
beiStatus.Caption = string.Format(@"[{0}]扫描完成！", e.web.Name);
ShowPageList(true); // 刷新一下结点
m_task = null; // 清空线程
}
}
// 开始扫描时，界面的显示
private void ShowBeginScan(object sender, BaseRule.SiteScanBeginEventArgs e)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new BaseRule.SiteScanBeginHandler(ShowBeginScan), new object[] { null, e });
}
else
{
// 将状态栏的文本提示和进度条显示出来
beiStatus.Visibility = DevExpress.XtraBars.BarItemVisibility.Always;
beiProcess.Visibility = DevExpress.XtraBars.BarItemVisibility.Always;
// 设置进度条的最大值
this.repositoryItemProgressBar1.Maximum = e.web.MaxPage;
// 初始化显示内容
beiStatus.Caption = string.Format(@"[{0}]开始准备扫描...", e.web.Name);
beiProcess.EditValue = 0;
}
}
// 保存所有扫描出来的页面到数据库里面
protected void SaveScanResult(object sender, BaseRule.ScanCompleteEventArgs e)
{
// 同一时间只能一个线程保存数据
System.Threading.Mutex m = new System.Threading.Mutex(false, "SaveDB");
m.WaitOne();
using (UnitOfWork uow = new UnitOfWork(XpoDefault.DataLayer)) // 开始事务
{
uow.BeginTransaction();
// 对于每个取得的新页面，判断是否已经存在，如果不存在就保存
foreach (Page page in e.pages)
{
XPCollection<Page> pages = new XPCollection<Page>(uow,
CriteriaOperator.Parse("URL = ?", page.URL));
if (pages.Count() == 0)
{
Page newPage = new Page(uow) { Parent_ID = CurrentWeb.Oid, Title = page.Title, URL = page.URL };
newPage.Save();
}
}
uow.CommitChanges();
}
m.ReleaseMutex();
}
public static void ShowMessage(object sender, BaseRule.ScanCompleteEventArgs e)
{
m_count ++;
Console.WriteLine(@"已经下载了{0}页，共{1}页", m_count, e.web.MaxPage);
}