MVC asp.net PartialView导致无参数构造函数错误？

MVC 2.0应用程序局部视图存在问题，即突然被访问时，所有内容实际上都在ViewData中，这是可怕的无参数构造函数错误。我尽可能地遵循了代码，并且我没有得到任何地方。这里是我的代码：MVC asp.net PartialView导致无参数构造函数错误？

控制器：

using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Web; 
    using System.Web.Mvc; 
    using System.ComponentModel; 
    using CINet.Areas.CatalystSearch.Models.Interfaces; 
    using CINet.Areas.CatalystSearch.Models.Repository; 
    using CINet.Areas.CatalystSearch.Models.Entities; 

    namespace CINet.Areas.CatalystSearch.Controllers 
    { 
     public class CatalystSearchController : Controller 
     { 
      // private SqlCatalystRepository _catalystItemRepository; 
      private ICatalystRepository _catalystInterface; 
      public int PageSize = 10; // Regulates size of page 

     #region CONSTRUCTOR 

     /// <summary> 
     /// Constructor which sets the passed repository to the local current 
     /// repository 
     /// </summary> 
     /// <param name="catalystRepository">Interface repository for controller</param> 
     public CatalystSearchController() 
     { 

     } 

     #endregion 

     #region DEFAULT VIEW 


     public ViewResult List([DefaultValue("")] string manufactureName, [DefaultValue("")] string manufacturePartNumber, [DefaultValue("")] string description, [DefaultValue(1)] int page) 
     { 

      IQueryable<CatalystItem> query = null; 
      CatalystFilter userFilter = new CatalystFilter(); 
      int totalItems = 0; 

      // Be sure that the manufacture drop down has been selected 
      if (manufactureName != "") 
      { 
       // Set up CatalystFilter 
       userFilter.Manufacture = manufactureName; 
       userFilter.DescriptionFilter = description; 
       userFilter.ManufacturePartNumberFilter = manufacturePartNumber; 

       // connection string for SQL 
       string connString = "Data Source=se-cinet-dev;Initial Catalog=cinet;User ID=sa;Password=Carouse1"; 


       // Get interface 
       _catalystInterface = new CatalystRepository(connString); 


       // Collects data from SQL repository and updates private local copy 
       // _catalystItemRepository = new SqlCatalystRepository(connString); 

       // Fills with list of Catalystitems based on filter. 
       query = _catalystInterface.GetCatalystItems(userFilter, page, PageSize); 
       // query = _catalystItemRepository.GetItems(userFilter, page, PageSize); 

       // Returns int of total items in list 
       totalItems = _catalystInterface.GetTotalOfItems(userFilter); 
       // totalItems = _catalystItemRepository.GetTotalOfItems(userFilter); 

       // Set up view model for passing to View 
       var viewModel = new CatalystModel 
       { 

        catalystItems = query.ToList(), 
        catalystFilter = userFilter, 

        /* Pass Paging properties to model*/ 
        PagingInfo = new PagingInfo 
        { 
         CurrentPage = page, 
         ItemsPerPage = PageSize, 
         TotalItems = totalItems 

        }, 
        ManufactureName = manufactureName 

       }; 

       // View Data to be passed to SearchView 
       ViewData["catalystItems"] = viewModel; 


       return View(viewModel); 
      } 

      else 
      { 
       var viewModel = new CatalystModel(); 
       return View(viewModel); 
      } 
     } 

     #endregion 

     #region SEARCH VIEW 

     /// <summary> 
     /// Partial View used to display results from controller 
     /// </summary> 
     /// <param name="model"> model passed via ViewData from List View</param> 
     /// <returns></returns> 
     [ChildActionOnly] 
     public ViewResult SearchView(CatalystModel model) 
     { 
      return View(model); 
     } 

     #endregion 

    } 
} 

listView: 

    <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<CINet.Areas.CatalystSearch.Models.Entities.CatalystModel>" %> 
<%@ Import Namespace="CINet.Areas.CatalystSearch.HtmlHelpers" %> 
<%@ Import Namespace="CINet.Areas.CatalystSearch.Models" %> 
<%@ Import Namespace="CINet.Areas.CatalystSearch.Models.Interfaces" %> 

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server"> 

    <div> 
     <center> 
      <strong> 
       <%= Html.ValidationSummary("Please fill out required Fields") %></strong> 

       <h1>Catalyst Search Provider</h1> 
      <hr /> 
      <%-- "Search","Catalyst" --%> 
      <% 
       using (Html.BeginForm()) 
       { %> 
      <table border="1"> 

       <tr> 
       <td>Enter Description (optional):</td> 
       <td> 
       <%: Html.TextBoxFor(x=>x.Description) %> 
       </td> 
       </tr> 

       <tr> 
       <td>Enter Part Number (optional):</td> 
       <td> 
       <%: Html.TextBoxFor(x=>x.ManufacturePartNumber) %> 
       </td> 
       </tr> 

       <tr> 
        <td>Choose Manufacture: 
        </td> 
        <td> 
         <%: Html.DropDownListFor(x => x.ManufactureName, Model.GetAllManufactures()) %> 
         <%-- <%: Html.DropDownList("ManufactureName", Model.GetAllManufactures(),"Choose Item")%> --%> 
        </td> 
       </tr> 
       <tr> 
        <td> 
         &nbsp 
        </td> 
        <td> 
         <input type="submit" name="Search" value="Search" /> 
        </td> 
       </tr> 
      </table> 
      <% } Html.EndForm(); %> 
      <!-- RENDERS PARTIAL VIEW TO DISPLAY GRID WITH SEARCH RESULTS --> 
      <% Html.RenderAction("SearchView", ViewData["catalystItems"]); %> 
      <br /> 
     </center> 
    </div> 
    <div class="pager"> 

     <% if (Model.PagingInfo != null) 
      { %> 
     <%: Html.PageLinks(Model.PagingInfo, x => Url.Action("List", new { page = x, manufactureName = Model.catalystFilter.Manufacture, description = Model.catalystFilter.DescriptionFilter, manufacturePartNumber = Model.catalystFilter.ManufacturePartNumberFilter }))%> 
     <% } %> 
    </div> 

</asp:Content> 

<asp:Content ID="Content2" ContentPlaceHolderID="head" runat="server"> 
</asp:Content> 


SearchView: 

    <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<CINet.Areas.CatalystSearch.Models.Entities.CatalystModel>" %> 
<%@ Import Namespace="CINet.Areas.CatalystSearch.HtmlHelpers" %> 
<%@ Import Namespace="CINet.Areas.CatalystSearch.Models" %> 

<div> 
    <% if (Model.catalystItems != null) 
     { %> 
     <table class="CatalystTableSpacer"> 
      <tr> 
       <td> 
        Contract Price 
       </td> 
       <td> 
        Description 
       </td> 
       <td> 
        Manufacture Name 
       </td> 
       <td> 
        Manufacture Part Number 
       </td> 
       <td> 
        MSRP Price 
       </td> 
       <td> 
        Quantity Available 
       </td> 

      </tr> 
      <% foreach (var items in Model.catalystItems) 
       {%> 
      <tr> 
       <td> 
        <%: items.ContractPrice%> 
       </td> 
       <td> 
        <%: items.Description%> 
       </td> 
       <td> 
        <%: items.ManufactureName%> 
       </td> 
       <td> 
        <%: items.ManufacturePartNumber%> 
       </td> 
       <td> 
        <%: items.MSRPrice%> 
       </td> 
       <td> 
        <%: items.QuantityAvailable%> 
       </td> 

      </tr> 
      <% } 
     } 

       %> 
      </table> 

      </div>

CatalystModel

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using CINet.Areas.CatalystSearch.Models.Entities; 
using System.ComponentModel.DataAnnotations; 
using CINet.Areas.CatalystSearch.Models.Repository; 
using CINet.Areas.CatalystSearch.Models.Interfaces; 

namespace CINet.Areas.CatalystSearch.Models.Entities 
{ 
    public class CatalystModel 
    { 

      #region PRIVATE FIELDS 

     private string _connectionString = "Data Source=se-cinet-dev;Initial Catalog=cinet;User ID=sa;Password=Carouse1"; // connection string for SQL 
     private ICatalystRepository _repository = null; 

     #endregion 
    #region PUBLIC PROPERTIES 

    public IList<CatalystItem> catalystItems { get; set; } 
    public PagingInfo PagingInfo { get; set; } 
    public CatalystFilter catalystFilter { get; set; } 
    public SelectList Manufactures { get; set; } 
    public SelectList Categories { get; set; } 

    [Required] 
    public string ManufactureName { get; set; } 

    public string Description { get; set; } 

    public string ManufacturePartNumber { get; set; } 

    #endregion 


    #region CONSTRUCTOR 

    /// <summary> 
    /// Constructor instantiates SQL DB Connection 
    /// </summary> 
    public CatalystModel() 
    { 
     _repository = new CatalystRepository(_connectionString); 
    // Manufactures = GetAllManufactures(); 
    } 



    #endregion 

    #region PUBLIC GET LISTS 

    /// <summary> 
    /// Returns ALL Manufactures in Database 
    /// </summary> 
    /// <returns></returns> 
    public SelectList GetAllManufactures() 
    { 
     SelectList manufactureNameSelectList; 
     List<Manufacture> manufactureTempList = new List<Manufacture>(); 

     // Get List from DB 
     manufactureTempList = _repository.GetManufactureList(); 

     // PUSH LIST INTO SELECT LIST 
     manufactureNameSelectList = new SelectList(manufactureTempList, "ManufactureName", "ManufactureName"); 

     return manufactureNameSelectList; 
    } 



    #endregion 

}

}

发生在ListView中的错误调用搜索查看：

<％Html.RenderAction （“SearchView”，ViewData [“catalystItems”]）; ％>

任何帮助？

实际误差：

Server Error in '/' Application. 
-------------------------------------------------------------------------------- 

No parameterless constructor defined for this object. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.MissingMethodException: No parameterless constructor defined for this object. 

Source Error: 


Line 53:    <!-- RENDERS PARTIAL VIEW TO DISPLAY GRID WITH SEARCH RESULTS --> 
Line 54:   <%-- <% Html.RenderPartial("SearchView", ViewData["catalystItems"]); %> 
Line 55:   --%> <% Html.RenderAction("SearchView", ViewData["catalystItems"]); %> 
Line 56:    
Line 57:    <br /> 


Source File: c:\Users\gcoleman\Documents\Source Code\Sandbox\Jonathan Henk\MVC\CINet\CINet\Areas\CatalystSearch\Views\CatalystSearch\List.aspx Line: 55 

Stack Trace: 


[MissingMethodException: No parameterless constructor defined for this object.] 
    System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0 
    System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98 
    System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241 
    System.Activator.CreateInstance(Type type, Boolean nonPublic) +69 
    System.Activator.CreateInstance(Type type) +6 
    System.Web.Mvc.DefaultModelBinder.CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) +403 
    System.Web.Mvc.DefaultModelBinder.BindSimpleModel(ControllerContext controllerContext, ModelBindingContext bindingContext, ValueProviderResult valueProviderResult) +544 
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +479 
    System.Web.Mvc.DefaultModelBinder.GetPropertyValue(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor, IModelBinder propertyBinder) +45 
    System.Web.Mvc.DefaultModelBinder.BindProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor) +658 
    System.Web.Mvc.DefaultModelBinder.BindProperties(ControllerContext controllerContext, ModelBindingContext bindingContext) +147 
    System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Object model) +98 
    System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +2504 
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +548 
    System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +475 
    System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +181 
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +830 
    System.Web.Mvc.Controller.ExecuteCore() +136 
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +111 
    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +39 
    System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__4() +65 
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +44 
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +42 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +141 
    System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +54 
    System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40 
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +52 
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +38 
    System.Web.Mvc.<>c__DisplayClassa.<EndProcessRequest>b__9() +44 
    System.Web.Mvc.<>c__DisplayClass4.<Wrap>b__3() +34 
    System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Func`1 func) +76 
    System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Action action) +113 
    System.Web.Mvc.ServerExecuteHttpHandlerAsyncWrapper.EndProcessRequest(IAsyncResult result) +124 
    System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +1072 

[HttpException (0x80004005): Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.] 
    System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +3058371 
    System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage) +77 
    System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +28 
    System.Web.HttpServerUtilityWrapper.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +22 
    System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter) +766 
    System.Web.Mvc.Html.ChildActionExtensions.RenderAction(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues) +98 
    System.Web.Mvc.Html.ChildActionExtensions.RenderAction(HtmlHelper htmlHelper, String actionName, Object routeValues) +65 
    ASP.areas_catalystsearch_views_catalystsearch_list_aspx.__RenderContent1(HtmlTextWriter __w, Control parameterContainer) in c:\Users\gcoleman\Documents\Source Code\Sandbox\Jonathan Henk\MVC\CINet\CINet\Areas\CatalystSearch\Views\CatalystSearch\List.aspx:55 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    ASP.views_shared_site_master.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in c:\Users\gcoleman\Documents\Source Code\Sandbox\Jonathan Henk\MVC\CINet\CINet\Views\Shared\Site.Master:26 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109 
    System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +8820669 
    System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +31 
    System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +53 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100 
    System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +208 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +208 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8 
    System.Web.UI.Page.Render(HtmlTextWriter writer) +29 
    System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +56 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3060 




-------------------------------------------------------------------------------- 
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.237

来源

2011-09-19 gcoleman0828

你的问题是CatalystModel类没有默认的构造函数，以便默认模型绑定不能在此实例吧：

[ChildActionOnly] 
public ViewResult SearchView(CatalystModel model) 
{ 
    return View(model); 
}

这是说有这样您正在调用的子控制器操作是这样的：

<% Html.RenderAction("SearchView", ViewData["catalystItems"]); %>

完全没用，并且没有任何价值。

你为什么不直接渲染部分：

<% Html.RenderPartial("SearchView", ViewData["catalystItems"]); %>

你也应该阅读Haacked blog post更好地理解和的RenderAction的RenderPartial之间的差异。

或者如果你真的（出于某种神秘原因）有一些控制器动作需要一些没有默认构造函数作为动作参数的模型，你需要为这个类型编写一个自定义模型活页夹并指定你的哪个自定义构造函数应该被用来实例化它，当然应该传递给它什么值。

来源

2011-09-19 22:06:47

感谢回去我这么快在这里。我刚才读到RenderPartial不太常用，但我会阅读那篇文章以获得更好的理解。至于构造函数，这不是它要求的模型吗？ ///

///构造实例SQL DB连接 ///

公共CatalystModel（） { _repository =新CatalystRepository（_connectionString）; // Manufactures = GetAllManufactures（）; } – gcoleman0828

@ user479323，我谈到了没有无参数构造函数的'CatalystModel'类。我真的不知道你在评论中展示了什么。 –

对，但我所说的是我有一个无参数的构造函数......它似乎是这样。看到上面，我编辑我的帖子，包括CatalystModel类。#region CONSTRUCTOR ///

///构造函数实例化SQL数据库连接///

public CatalystModel（）{_repository = new CatalystRepository（_connectionString）; //生产商= GetAllManufactures（）; } – gcoleman0828

试试这个：

<% Html.RenderAction("SearchView", new { model = ViewData["catalystItems"] }); %>

来源

2011-09-19 23:54:51

MVC asp.net PartialView导致无参数构造函数错误？

回答

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