MVC2实体框架 - 更新模型

首先，我是正在尝试使用MVC与VB这个星球上唯一的开发商？我搜索了大量的论坛并阅读了许多帖子，每个提出问题的人都在C＃中给出了一个例子。无论如何，现在我已经知道了，我有一个简单的数据库表（用户）与一些列（UserId，用户名，名，姓）。我正在使用实体框架，并在我的编辑视图中，我正在更改一个值（用户名）并单击保存。在我编辑http文章中，我告诉它返回到索引并且该值没有保存。虽然，在我的http post的构造函数中，我返回对象并显示新的值...但该值不会使数据库...任何帮助？MVC2实体框架 - 更新模型

我的控制器：

Function Edit(ByVal ID As Guid) As ActionResult 
     'get the user 
     Dim usr = (From u In db.Users 
        Where u.UserId = ID 
        Select u).Single 

     Return View(usr) 
    End Function 

    <HttpPost()> _ 
    Function Edit(ByVal ID As Guid, ByVal usrInfo As User, ByVal formValues As FormCollection) As ActionResult 
     '   Dim usr As User = db.Users.Single(Function(u) u.UserId = ID) 

     If ModelState.IsValid Then 
      TryUpdateModel(usrInfo, "User") 

      Return RedirectToAction("Index") 
     Else 
      Return View(usrInfo) 
     End If 
    End Function

我的观点：

<h2>Edit</h2> 

<%-- The following line works around an ASP.NET compiler warning --%> 
<%: ""%> 

<% Using Html.BeginForm() %> 
    <%: Html.ValidationSummary(True) %> 
    <fieldset> 
     <legend>Fields</legend> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.UserId) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.UserId) %> 
      <%: Html.ValidationMessageFor(Function(model) model.UserId) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.Username) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.Username) %> 
      <%: Html.ValidationMessageFor(Function(model) model.Username) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.FirstName) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.FirstName) %> 
      <%: Html.ValidationMessageFor(Function(model) model.FirstName) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.LastName) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.LastName) %> 
      <%: Html.ValidationMessageFor(Function(model) model.LastName) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.CreatedDate) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.CreatedDate, String.Format("{0:g}", Model.CreatedDate)) %> 
      <%: Html.ValidationMessageFor(Function(model) model.CreatedDate) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.CreatedBy) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.CreatedBy) %> 
      <%: Html.ValidationMessageFor(Function(model) model.CreatedBy) %> 
     </div> 

     <div class="editor-label"> 
      <%: Html.LabelFor(Function(model) model.LastLogin) %> 
     </div> 
     <div class="editor-field"> 
      <%: Html.TextBoxFor(Function(model) model.LastLogin, String.Format("{0:g}", Model.LastLogin)) %> 
      <%: Html.ValidationMessageFor(Function(model) model.LastLogin) %> 
     </div> 

     <p> 
      <input type="submit" value="Save" /> 
     </p> 
    </fieldset> 

<% End Using %> 

<div> 
    <%: Html.ActionLink("Back to List", "Index") %> 
</div>

来源

2010-11-16 Keith

确定，所以，aparently我使用MVC的唯一VB开发人员。无论如何，我找到了答案。这是ASP.Net站点上的MVC初学者教程之一（Found Here）。答案是改变我的编辑功能（HttpPost），以便它利用张贴的表单值：

<HttpPost()> _ 
    Function Edit(ByVal id As Guid, ByVal collection As FormCollection) As ActionResult 
     Dim rest = (From r In db.Restaurants 
       Where r.RestaurantId = id 
       Select r).Single() 

     Try 

      TryUpdateModel(rest, collection.ToValueProvider()) 

      db.SaveChanges() 

      Return RedirectToAction("Index") 
     Catch 
      Return View(rest) 
     End Try 
    End Function

来源

2010-11-16 05:42:00 Keith

MVC2实体框架 - 更新模型

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