You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create two user controls named UserCtrlA.ascx and UserCtrlB.ascx. The user controls postback to the server. You create a new Web page that has the following ASPX code: <asp:CheckBox ID="Chk" runat="server" oncheckedchanged="Chk_CheckedChanged" AutoPostBack="true" /> <asp:PlaceHolder ID="PlHolder" runat="server"></asp:PlaceHolder> To dynamically create the user controls, you write the following code segment for the Web page: public void LoadControls() { if (ViewState["CtrlA"] != null) { Control c; if ((bool)ViewState["CtrlA"] == true) { c = LoadControl("UserCtrlA.ascx"); } else { c = LoadControl("UserCtrlB.ascx"); } c.ID = "Ctrl"; PlHolder.Controls.Add(c); } } protected void Chk_CheckedChanged(object sender, EventArgs e) { ViewState["CtrlA"] = Chk.Checked; PlHolder.Controls.Clear(); LoadControls(); } You need to ensure that the user control that is displayed meets the following requirements: It is recreated during postback It retains its state. Which method should you add to the Web page?() A。 B。 C。 D。
各地要高度重视政府购买养老服务工作,要建立健全()的工作机制。 政府统一领导。 财政部门牵头。 民政等有关职能部门协同。 社会广泛参与。
《中华人民共和国特种设备安全法》规定,负责特种设备安全监督管理的部门对依法办理使用登记的特种设备应当建立完整的监督管理档案和() 网上公示系统。 检索系统。 信息查询系统。
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建筑单位为进行项目进度控制召开讨论会,确定讨论会参加单位的行为属于施工方进度控制中的()。 组织措施。 管理措施。 技术措施。 经济措施。
You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .The Xxx network has a client computer named XXX-WS662 that has Microsoft Windows 7 installed.How can you proceed with the deployment of management tools for Exchange 2010 on XXX-EX02?()