Question

我正在使用

MVC 3
VB.NET和
Razor ViewEngine。

我在我的应用程序中使用WebGrid，它告诉我“failEmList”不存在。

以下是调用函数，视图以及从中获取数据的模型部分的代码。

FailEmailSends只是一个List（字符串），并且包含单个电子邮件地址条目的行。

  Dim vm As New MassEmailVM
  For Each _fail In failEmailSends
      vm.failEmList.Add(_fail)
  Next
  ViewBag.succCount = succCount.ToString
  ViewBag.failECount = failEmailCount.ToString
  Return View(vm)

查看如下：

@Modeltype xxxxxxxxxxxxx
@Code
ViewData("Title") = "Mass Emails Sent"

End Code


<table>
<tr><th>Total Sent</th><td>@ViewBag.succCount</td></tr>
<tr><th>Total Fail</th><td>@ViewBag.failECount</td></tr>
<tr><th>Fail Email Addresses</th></tr>
</table>

@code
Dim grid = New WebGrid(Model.failEmList)

End Code


<div id="grid">
@grid.GetHtml(
tableStyle:="grid",
headerStyle:="head",
alternatingRowStyle:="alt",
columns:=grid.Columns(
    grid.Column("failEmList", "Email List")
    ))
</div>

视图的相关部分模型：

Private _failEmList As New List(Of String)
Public Property failEmList() As List(Of String)
    Get
        Return _failEmList
    End Get
    Set(ByVal value As List(Of String))
        _failEmList = value
    End Set
End Property

任何想法为什么会抛出以下错误：

  System.InvalidOperationException was unhandled by user code
  Message=Column "failEmList" does not exist.
  Source=System.Web.Helpers
  StackTrace:
   at System.Web.Helpers.WebGridRow.get_Item(String name)
   at System.Web.Helpers.WebGrid.GetTableBodyHtml(IEnumerable`1 columns, String rowStyle, String alternatingRowStyle, String selectedRowStyle)
   at System.Web.Helpers.WebGrid.Table(String tableStyle, String headerStyle, String footerStyle, String rowStyle, String alternatingRowStyle, String selectedRowStyle, String caption, Boolean displayHeader, Boolean fillEmptyRows, String emptyRowCellValue, IEnumerable`1 columns, IEnumerable`1 exclusions, Func`2 footer, Object htmlAttributes)
   at System.Web.Helpers.WebGrid.GetHtml(String tableStyle, String headerStyle, String footerStyle, String rowStyle, String alternatingRowStyle, String selectedRowStyle, String caption, Boolean displayHeader, Boolean fillEmptyRows, String emptyRowCellValue, IEnumerable`1 columns, IEnumerable`1 exclusions, WebGridPagerModes mode, String firstText, String previousText, String nextText, String lastText, Int32 numericLinksCount, Object htmlAttributes)
   at ASP._Page_Views_Admin_MassEmailsSent_vbhtml.Execute() in C:\Users\Skindeep\Documents\Visual Studio 2010\Projects\xxxxxxxxxx\Views\Admin\MassEmailsSent.vbhtml:line 21
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.StartPage.RunPage()
   at System.Web.WebPages.StartPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
   at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   InnerException:

Answer 1

您可以尝试以下方法：

@Code
    Dim grid = New WebGrid(Model.failEmList)
End Code

<div id="grid">
    @grid.GetHtml(
        tableStyle:= "grid",
        headerStyle:= "head",
        alternatingRowStyle:= "alt",
        columns:= grid.Columns(
            grid.Column(format:= Function(item) item, header:= "Email List")
        )
    )
</div>

Answer 2

试试这个

@grid.GetHtml(
 columns: new[] {
    grid.Column(format: (item) => item)
}
)

Answer 3

如果它对某人有帮助，在我的情况下我做了一个复制/粘贴错误，并且在声明网格时忘了更改源代码！一旦我用上面的建议更正了第一列，第二列就抛出了同样的错误。

Dim grid = New WebGrid(Model.WasTheWrongNameHere)

Webview给出列不存在错误

3 个答案: