将模型传递给MVC控制器

Question

所以我有一个问题将一个参数传递给我的控制器。

当我执行Ajax.BeginForm并按如下方式传入时：

<% Using Ajax.BeginForm("MultiProcess", "Orders", New MultiProcessRequestViewModel With {.SearchParams = Model.SearchParams},New AjaxOptions With {.UpdateTargetId = "ordersOutput", .OnSuccess = "afterRead", .LoadingElementId = "readingOrders"})%>

该值显示为＆＃39; Nothing＆＃39; 。

但是，如果我只是执行以下操作，则在同一页面上：

<%=New JavaScriptSerializer().Serialize(Model.SearchParams) %>

尝试测量值是否已设置。我可以看到该值确实设置和正确。

整个部分供参考：

<% Using Ajax.BeginForm("MultiProcess", "Orders", New MultiProcessRequestViewModel With {.SearchParams = Model.SearchParams}, New AjaxOptions With {.UpdateTargetId = "ordersOutput", .OnSuccess = "afterRead", .LoadingElementId = "readingOrders"})%>
    <%=New JavaScriptSerializer().Serialize(Model.SearchParams) %>

        <div>
            <%=Html.Hidden("SearchParams", Model.SearchParams) %>
            <%=Html.Hidden("Test", "Just in case") %>
            <%=Html.DropDownList("Process", Model.Processes)%>
            <input type="submit" value="Process selected items" class="FormButton" id="btnMultiProcess" />
            <br />
        </div>  

<%  End Using %>

测试和过程两者都有效。以下是参考模型：

Public Class MultiProcessRequestViewModel
    Public Property SearchParams As New Orders.OrderSearchFilters
    Public Property Process As String
    Public Property SelectedItems As New List(Of String)
    Public Property Test As String

End Class