如何使DataAnnotations在asp.net 4.5 WebForms中工作? [英] How to get DataAnnotations working in asp.net 4.5 WebForms?

问题描述

我正在使用带有模型绑定和实体框架5的.net 4.5 WebForms.

I'm using .net 4.5 WebForms with Model Binding and Entity Framework 5.

我的网络表单的一部分:

Part of my webform:

                        <asp:ListView ID="MenteeModuleList" ItemPlaceholderID="itemPlaceHolder"
                        OnCallingDataMethods="MenteeModuleList_CallingDataMethods"
                        ItemType="PFA_Mentorship.BLL.MenteeModuleBL+MenteeModuleGrid"
                        DataKeyNames="MenteeModuleID"
                        SelectMethod="GetMenteeModulesGrid"
                        InsertItemPosition="LastItem"
                        InsertMethod="InsertMenteeModule"
                        runat="server">
                        <LayoutTemplate>
                            <table runat="server">
                                <tr runat="server">
                                    <th id="Th1" runat="server">Module</th>
                                    <th id="Th2" runat="server">Start Date</th>
                                    <th id="Th3" runat="server">Due Date</th>
                                    <th runat="server"></th>
                                </tr>
                                <tr runat="server" id="itemPlaceHolder"></tr>
                            </table>
                        </LayoutTemplate>
                        <ItemTemplate>
                            <tr id="tr1" runat="server">
                                <td runat="server">
                                    <asp:Label runat="server" ID="moduleName" Text="<%#: BindItem.ModuleName %>"></asp:Label>
                                </td>
                                <td id="tr2" runat="server">
                                    <asp:Label runat="server" ID="startDate" Text="<%#: BindItem.StartDate %>"></asp:Label>
                                </td>
                                <td id="td3" runat="server">
                                    <asp:Label runat="server" ID="dueDate" Text="<%#: BindItem.DueDate %>"></asp:Label>
                                </td>
                                <td runat="server">
                                    <asp:LinkButton runat="server" ID="Edit" CommandName="Edit" CommandArgument="<%#: BindItem.MenteeModuleID %>" Text="Edit" />
                                </td>
                            </tr>
                        </ItemTemplate>
                        <InsertItemTemplate>
                        </InsertItemTemplate>
                        <EditItemTemplate>
                            <tr>
                                <td id="Td1" runat="server">
                                    <asp:Label ID="moduleName" runat="server" Text="<%#: BindItem.ModuleName %>"></asp:Label>
                                </td>
                                <td id="tr2" runat="server">
                                    <asp:TextBox ID="startDate" runat="server" Text="<%#: BindItem.StartDate %>"></asp:TextBox>
                                </td>
                                <td id="td3" runat="server">
                                    <asp:TextBox ID="dueDate" runat="server" text="<%#: BindItem.DueDate %>"></asp:TextBox>
                                </td>
                                <td>

                                </td>
                            </tr>
                        </EditItemTemplate>
                    </asp:ListView>

我绑定的实体:

    public class MenteeModuleGrid
    {
        public int MenteeModuleID { get; set; }

        public string ModuleName { get; set; }

        public int MenteeID { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy/MM/dd}")]
        public System.DateTime StartDate { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy/MM/dd}")]
        public System.DateTime DueDate { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy/MM/dd}")]
        public Nullable<System.DateTime> CompletedDate { get; set; }
    }

尽管有数据注释，日期字段仍以查看模式和编辑模式显示为"2013/01/01 12:00:00 AM".

The date fields are displaying in view mode as well as edit mode as "2013/01/01 12:00:00 AM" despite the data annotations.

我在做什么错了?

推荐答案

Asp.Net 4.5 Webforms中具有模型绑定的数据注释显然无法100％正常工作.作为一种变通办法，我不得不采取如下方式格式化每个页面标记上的显示:

It surely seems that data annotations with model binding in Asp.Net 4.5 webforms does not work 100%. As a work around I had to resort to formatting the display on each page's markup like this:

<asp:Literal runat="server" ID="dueDate" Text='<%#Eval("DueDate", "{0:yyyy/MM/dd}") %>'></asp:Literal>

令人讨厌，但项目有到期日，需要完成.希望微软能够在下一版本中解决该错误.

Nasty, but projects have due dates and need to be completed. Lets hope Microsoft sorts this bug out in the next release.

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