WebGrid中的下拉列表 - MVC4

Question

有人能告诉我我在做什么在Dropdownlist查看错误？我认为它期望SelectList的下拉列表？先谢谢你。

我的模型：

public class AppointmentModel 
    { 
     public int CustomerID { get; set; } 
     public string LastName { get; set; } 
     public string FirstName { get; set; }   
     public List<DateTime> ApptDates { get; set; } 
    } 

查看：

@{ 
    var grid = new WebGrid(Model, rowsPerPage: ViewBag.RowsPerPage);  
    @grid.GetHtml(columns: grid.Columns(
     grid.Column(columnName: "LastName", header: "Last Name", canSort: true, format: @<text>@item.LastName</text>), 
     grid.Column(columnName: "LastName", header: "First Name", canSort: true, format: @<text>@item.Firstname</text>), 
     grid.Column(columnName: "ApptDates", header: "Appointment Dates", format: @Html.DropDownList(@item.ApptDates)) 
     ));            
} 

以下更改解决了该问题：

public class AppointmentModel 
    { 
     public int CustomerID { get; set; } 
     public string LastName { get; set; } 
     public string FirstName { get; set; }   
     public DateTime ApptDt { get; set; } 
     public IEnumerable<SelectListItem> ApptDatesSelectList { get; set; } 
    } 

查看

@{ 
    var grid = new WebGrid(Model, rowsPerPage: ViewBag.RowsPerPage);  
    @grid.GetHtml(columns: grid.Columns(
     grid.Column(columnName: "LastName", header: "Last Name", canSort: true, format: @<text>@item.LastName</text>), 
     grid.Column(columnName: "LastName", header: "First Name", canSort: true, format: @<text>@item.Firstname</text>), 
     grid.Column(columnName: "ApptDates", header: "Appointment Dates", format: @<text>@Html.DropDownList("ApptDt", (IEnumerable<SelectListItem>)@item.ApptDatesSelectList)</text>) 
     ));            
} 

Answer 1

假设回答我的意见是，每次约会都有一个日期，你首先需要一个属性添加到模型的具体日期：

public class AppointmentModel 
    { 
     public int CustomerID { get; set; } 
     public string LastName { get; set; } 
     public string FirstName { get; set; } 
     public DateTime AppointmentDate {get; set;}   
     public List<DateTime> ApptDates { get; set; } 
    } 

然后你需要你的潜在的约会在SelectList一次你这样做，你可以实现像这样：

@{ 
    var grid = new WebGrid(Model, rowsPerPage: ViewBag.RowsPerPage);  
    @grid.GetHtml(columns: grid.Columns(
     grid.Column(columnName: "LastName", header: "Last Name", canSort: true, format: @<text>@item.LastName</text>), 
     grid.Column(columnName: "LastName", header: "First Name", canSort: true, format: @<text>@item.Firstname</text>), 
     grid.Column(columnName: "ApptDates", header: "Appointment Dates", format: @<text> @Html.DropDownList(@item.AppointmentDate, yourSelectList)</text>) 
     ));            
}