實體框架5：連接兩個字段

Question

我想連接兩個字段並列出數據庫類的所有項目。使用Entity framework和ASP.Net MVC的列表方法，爲什麼我不能這樣做？

@foreach (var item in Model) { 
    <tr> 
     <td> 
      @Html.DisplayFor(modelItem => item.FName + " " + item.Lname) 
     </td> 
     <td> 
      @Html.DisplayFor(modelItem => item.Address) 
     </td> 
     <td> 
      @Html.DisplayFor(modelItem => item.Email) 
     </td> 
     <td> 
      @Html.ActionLink("Edit", "Edit", new { id=item.CustomerID }) | 
      @Html.ActionLink("Accounts", "Accounts", new { id=item.CustomerID }) | 
      @Html.ActionLink("Delete", "Delete", new { id=item.CustomerID }) 
     </td> 
    </tr> 
} 

我得到以下錯誤：

Compilation Error 

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. 

Compiler Error Message: CS1061: 'Customer' does not contain a definition for 'Lname' and no extension method 'Lname' accepting a first argument of type 'Customer' could be found (are you missing a using directive or an assembly reference?) 

如何解決此問題？

Answer 1

簡單的解決方法：

@Html.DisplayFor(modelItem => item.FName) @Html.DisplayFor(modelItem => item.LName) 

或者，一個屬性添加到您的模型：

public string FullName { get { return FName + " " + LName; } } 

然後執行：

@Html.DisplayFor(modelItem => item.FullName) 

附加說明：

經進一步檢查你的錯誤，我懷疑你錯打Lname - 也許你的意思是LName？無論如何，以這種方式使用級聯將不起作用，並將導致此錯誤，而不是：

Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.