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MVC asp.net PartialView導致無參數構造函數錯誤？

2011-09-19 89 views
0

MVC 2.0應用程序局部視圖存在問題，即突然被訪問時，所有內容實際上都在ViewData中，這是可怕的無參數構造函數錯誤。我儘可能地遵循了代碼，並且我沒有得到任何地方。這裏是我的代碼：MVC asp.net PartialView導致無參數構造函數錯誤？

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 

}

}

發生在ListView中的錯誤調用搜索查看：

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

任何幫助？

實際誤差：

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

來源

2011-09-19 gcoleman0828

回答

3

你的問題是CatalystModel類沒有默認的構造函數，以便默認模型綁定不能在此實例吧：

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

這是說有這樣您正在調用的子控制器操作是這樣的：

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

完全沒用，並且沒有任何價值。

你爲什麼不直接渲染部分：

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

你也應該閱讀Haacked blog post更好地理解和的RenderAction的RenderPartial之間的差異。

或者如果你真的（出於某種神祕原因）有一些控制器動作需要一些沒有默認構造函數作爲動作參數的模型，你需要爲這個類型編寫一個自定義模型活頁夾並指定你的哪個自定義構造函數應該被用來實例化它，當然應該傳遞給它什麼值。

來源

2011-09-19 22:06:47

+0

感謝回去我這麼快在這裏。我剛纔讀到RenderPartial不太常用，但我會閱讀那篇文章以獲得更好的理解。至於構造函數，這不是它要求的模型嗎？ ///

///構造實例SQL DB連接 /// 公共CatalystModel（） { _repository =新CatalystRepository（_connectionString）; // Manufactures = GetAllManufactures（）; } – gcoleman0828

+0

@ user479323，我談到了沒有無參數構造函數的'CatalystModel'類。我真的不知道你在評論中展示了什麼。 –

+0

對，但我所說的是我有一個無參數的構造函數......它似乎是這樣。看到上面，我編輯我的帖子，包括CatalystModel類。#region CONSTRUCTOR ///

///構造函數實例化SQL數據庫連接/// public CatalystModel（）{_repository = new CatalystRepository（_connectionString）; //生產商= GetAllManufactures（）; } – gcoleman0828

0

試試這個：

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

來源

2011-09-19 23:54:51

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