UpdateProgress属性DynamicLayout和DisplayAfter

aspx

    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>

        <asp:UpdateProgress ID="UpdateProgress1" runat="server" DynamicLayout="false" AssociatedUpdatePanelID="UpdatePanel1">
            <ProgressTemplate>
                DynamicLayout = false
            </ProgressTemplate>
        </asp:UpdateProgress>


        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <%= DateTime.Now %>
                <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
            </ContentTemplate>
        </asp:UpdatePanel>
        
        <asp:UpdatePanel ID="UpdatePanel2" runat="server">
            <ContentTemplate>
                <%= DateTime.Now %>
                <asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button1_Click" />
            </ContentTemplate>
        </asp:UpdatePanel>
        
        <asp:UpdateProgress ID="UpdateProgress2" runat="server" DynamicLayout="true" DisplayAfter="3000">
            <ProgressTemplate>
                DynamicLayout = true
            </ProgressTemplate>
        </asp:UpdateProgress>
        
        
        <hr />
    </form>

cs

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Thread.Sleep(5000);
    }

Thread.Sleep(5000);等待5秒
DynamicLayout，指的是UpdateProgress隐藏的时候是否占位
DisplayAfter，指的是UpdateProgress延迟多久才显示（单位：毫秒，1秒=1000毫秒）