c#委托----我的一点笔记

 public partial class ucBloodLabs
 {
    public delegate void ShowBloodEvent();
    public ShowBloodEvent ShowBloodData;
 }

public partial class ucDiabeticLab
    {
        public delegate void ShowCurrentDataEvent();
        public ShowCurrentDataEvent ShowCurrentData;
}

   public partial class frmLaboratory {

 ucDiabeticLab.ShowCurrentData += new ucDiabeticLab.ShowCurrentDataEvent(showBloodLabData);
  private void showBloodLabData()
         {
             if (ucBloodTabs == null)
             {

                 ucBloodTabs = new ucBloodLabs(str_PatientId, str_PatientSN);
                 this.pan_Left.Controls.Add(ucBloodTabs);
                 ucBloodTabs.Dock = DockStyle.Fill;
                 ucBloodTabs.ShowBloodData += new Control.ucBloodLabs.ShowBloodDataEvent(showBloodData);
             }
             this.ucDiabeticLab.Visible = false;
             if (ucBloodTabs != null)
             {
                 this.ucBloodTabs.Visible = true;
                 this.ucBloodTabs.BringToFront();
             }
             this.ucBloodTabs.PatientId = str_PatientId;
             this.ucBloodTabs.VisitId = str_PatientSN;
             this.ucBloodTabs.InitPage();
             if (frm != null)
             {
                 frm.Close();
                 frm = null;
             }

         }
  private void showBloodData()
         {
             Application.DoEvents();
             this.ucDiabeticLab.Visible = true;
             if (ucBloodTabs != null)
             {
                 this.ucBloodTabs.Visible = false;
             }
         }
 }