Telerik MVC Grid - 可空 DateTime 属性的问题
我对 Telerik MVC 扩展相当陌生。我已经在视图中成功实现了我的第一个实例。我没有使用 Telerik MVC 网格实现第二个视图，但是绑定到网格的类有 2 列，其类型为 Nullable。当我运行代码时，视图会抛出如下错误：
传递到字典中的模型项为空，但该字典需要类型为“System.DateTime”的非空模型项。
我最初认为这可能是模板的渲染问题，该模板仅适用于 DateTime 而不适用于 Nullable，但后来我完全取出了显示这些 DataTime 的任何列？特性。
我的代码如下：
查看 Telerik MVC Grid 的代码
<%= Html.Telerik().Grid(Model.ScheduledCourseList)
.Name("ScheduledCoursesGrid")
.ToolBar(commands => commands.Insert().ButtonType(GridButtonType.Image).ImageHtmlAttributes(new { style = "margin-left:0" }))
.DataKeys(keys => keys.Add(sc => sc.Id))
.DataBinding(dataBinding =>
dataBinding.Ajax()
.Select("_List", "Course")
.Insert("_InsertAjax", "Course")
.Update("_UpdateAjax", "Course")
.Delete("_DeleteAjax", "Course")
)
.Columns(columns =>
{
columns.Bound(c => c.Id).Width(20);
//columns.Bound(c => c.ScheduledDateTime).Width(120);
//columns.Bound(c => c.Location).Width(150);
columns.Command(commands =>
{
commands.Edit().ButtonType(GridButtonType.Image);
commands.Delete().ButtonType(GridButtonType.Image);
}).Width(180).Title("Commands");
})
.Editable(editing => editing.Mode(GridEditMode.PopUp))
.Sortable()
.Footer(true) %>
DTO
public class ScheduledCourseDTO
{
public int Id { get; set; }
public int CourseId { get; set; }
public int CourseProviderId { get; set; }
public DateTime? ScheduledDateTime { get; set; }
public DateTime? EndDateTime { get; set; }
public string Location { get; set; }
public int SiteId { get; set; }
public decimal CostBase { get; set; }
public decimal CostPerAttendee { get; set; }
public decimal PricePerAttendee { get; set; }
public int MaxAttendees { get; set; }
public int CancellationDays { get; set; }
public bool Deleted { get; set; }
}
有人知道我如何解决这个问题吗？
I am reasonably new to Telerik MVC extensions. I have implemented my first instance in a view successfully. I am not implementing my second view using the Telerik MVC Grid, however the class that is being bound to the grid has 2 columns which are of type Nullable. When I run my code, the view spits out an error as follows:
The model item passed into the dictionary is null, but this dictionary requires a non-null model item of type 'System.DateTime'.
I originally thought this might be a rendering problem with a template that only works with DateTime and not Nullable, but then I totally took out any columns displaying these DataTime? properties.
My code is as follows:
View code for Telerik MVC Grid
<%= Html.Telerik().Grid(Model.ScheduledCourseList)
.Name("ScheduledCoursesGrid")
.ToolBar(commands => commands.Insert().ButtonType(GridButtonType.Image).ImageHtmlAttributes(new { style = "margin-left:0" }))
.DataKeys(keys => keys.Add(sc => sc.Id))
.DataBinding(dataBinding =>
dataBinding.Ajax()
.Select("_List", "Course")
.Insert("_InsertAjax", "Course")
.Update("_UpdateAjax", "Course")
.Delete("_DeleteAjax", "Course")
)
.Columns(columns =>
{
columns.Bound(c => c.Id).Width(20);
//columns.Bound(c => c.ScheduledDateTime).Width(120);
//columns.Bound(c => c.Location).Width(150);
columns.Command(commands =>
{
commands.Edit().ButtonType(GridButtonType.Image);
commands.Delete().ButtonType(GridButtonType.Image);
}).Width(180).Title("Commands");
})
.Editable(editing => editing.Mode(GridEditMode.PopUp))
.Sortable()
.Footer(true) %>
DTO
public class ScheduledCourseDTO
{
public int Id { get; set; }
public int CourseId { get; set; }
public int CourseProviderId { get; set; }
public DateTime? ScheduledDateTime { get; set; }
public DateTime? EndDateTime { get; set; }
public string Location { get; set; }
public int SiteId { get; set; }
public decimal CostBase { get; set; }
public decimal CostPerAttendee { get; set; }
public decimal PricePerAttendee { get; set; }
public int MaxAttendees { get; set; }
public int CancellationDays { get; set; }
public bool Deleted { get; set; }
}
Does anybody have an idea how I can solve this?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
我设法在 Telerik 论坛上找到了这个问题的解决方案。如果其他人遇到此问题，请查看以下线程：
http://www.telerik.com/community/forums/aspnet-mvc/grid/problem-with-nullable-datetime-property.aspx#1423387
简而言之，解决方案是您的 ASP.NET MVC 项目的 Views/Shared 文件夹中应该有一个 EditorTemplates 文件夹。此 EditorTemplates 文件夹是由 Telerik 添加的。在此文件夹中，有一个名为 DateTime.ascx 的模板视图，它继承自 System.Web.Mvc.ViewUserControl。问题在于模板需要正常的日期时间。要修复此问题，请将其更改为期望可为空的 DateTime，如下所示：
这解决了问题。
I managed to find the solution to this problem on the Telerik forums. If anybody else is experiencing this problem, check out the following thread:
http://www.telerik.com/community/forums/aspnet-mvc/grid/problem-with-nullable-datetime-property.aspx#1423387
In short, the solution is that you should have a EditorTemplates folder in your Views/Shared folder of your ASP.NET MVC project. This EditorTemplates folder is added by Telerik. In this folder there is a template view called DateTime.ascx which inherits from System.Web.Mvc.ViewUserControl. The problem is that the template is expecting a normal DateTime. To fix it, change it to expect a nullable DateTime as follows:
This solves the problem.
您还必须删除以前可能拥有的任何（不可为空）模板，以便使用 DateTime?被击中的模板。
System.Web.Mvc.ViewUserControlYou must also delete any (non-nullable) templates you may have had before in order for the DateTime? template to be hit.
System.Web.Mvc.ViewUserControl<System.DateTime>