protected void btnAdd_Click(object sender, EventArgs e)
 {
     bool addSuccess = new CreateClass().AddNewUserToXMLFile(dlYear.SelectedValue, txtName.Text);
     lblAddMessage.Text = addSuccess ?
         "添加新成员成功!" :
         "该成员已存在,请不要重复添加!";
     lblAddMessage.CssClass = addSuccess ? "alert alert-success" : "alert alert-danger";
 }
 protected void btnDel_Click(object sender, EventArgs e)
 {
     bool boolSuccess = new CreateClass().DeleUserFromXMLFile(dlYearDel.SelectedValue, dlUserNameDel.SelectedValue);
     lblDelMessage.Text = boolSuccess ?
         "删除成员成功!" :
         "无法找到该成员信息";
     lblDelMessage.CssClass = boolSuccess ? "alert alert-success" : "alert alert-danger";
     lblDelWholeYearMessage.Text = "";
 }
 protected void btnDelWholeYear_Click(object sender, EventArgs e)
 {
     bool boolSuccess = new CreateClass().DeletWholeYearData(ddlDelWholeYear.SelectedValue);
     lblDelWholeYearMessage.Text = boolSuccess ?
       "删除整年数据成功!" :
       "该年内已无数据!";
     lblDelWholeYearMessage.CssClass = boolSuccess ? "alert alert-success" : "alert alert-danger";
     lblDelMessage.Text = "";
 }