this.sbrNote.Panels[1].Text=this.ActivateMdiChild.Text.ToString();
int ctr=this.MdiChildren.Length;
this.sbrNote.Panels[2].Text="子窗体的数量为:"+ctr.ToString();
int ctr=this.MdiChildren.Length;
this.sbrNote.Panels[2].Text="子窗体的数量为:"+ctr.ToString();
="子窗体的数量为:"+ctr.ToString(); 后面的ctr可以不要tostring(),这里会隐式转换的