private void dataGrid_Record_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            String       title  = ((System.Data.DataRowView)(dataGrid_Record.CurrentCell.Item)).Row.ItemArray[2].ToString();
            String       date   = ((System.Data.DataRowView)(dataGrid_Record.CurrentCell.Item)).Row.ItemArray[1].ToString();
            String       detail = ((System.Data.DataRowView)(dataGrid_Record.CurrentCell.Item)).Row.ItemArray[3].ToString();
            RecordDetail rd     = RecordDetail.getRecordDetail(title, date, detail, this.Top, this.Left);

            rd.Show();
        }
 public static RecordDetail getRecordDetail(String title, String date, String content, double x, double y)
 {
     //判断是否已经建立过窗体
     if (instance == null)
     {
         instance = new RecordDetail(title, date, content, x, y);
     }
     else //如果建立,则更新内容
     {
         instance.textBlock_Detail.Text = title;
         instance.textBox_Date.Text     = date;
         instance.textBlock_Detail.Text = content;
     }
     return(instance);
 }