MVC3驗證局部視圖

Question

我對MVC還很陌生，所以請耐心等待。

我有一個包含局部視圖的簡單視圖。在這種局部視圖模型我有驗證的註釋，像這樣：

public class LocationViewModel 
{ 
    [Display(Name = "Area")] 
    [UIHint("DropDownList")] 
    public int? AreaId { get; set; } 
    public string Area { get; set; } 
    public IEnumerable<AWS.DTO.Lookup> Areas { get; set; } 

    [Display(Name = "Establishment")] 
    [UIHint("DropDownList")] 
    public int? EstablishmentId { get; set; } 
    public string Establishment { get; set; } 
    public IEnumerable<AWS.DTO.Lookup> Establishments { get; set; } 

    [Display(Name = "Property")] 
    [UIHint("DropDownList")] 
    [Required(ErrorMessage = "Category is required.")] 
    public int PropertyId { get; set; } 
    public string Property { get; set; } 
    public IEnumerable<AWS.DTO.Lookup> Properties { get; set; } 
} 

局部視圖：

@model AWS.PL.ViewModels.LocationViewModel 

<script type="text/javascript"> 
    function getSEATs(area) { 
     $.ajax({ 
      url: "@Url.Action("SelectSEATs", "Location")", 
      data: { areaId: area }, 
      dataType: "json", 
      type: "POST", 
      error: function() { 
       alert("An error occurred."); 
      }, 
      success: function (data) { 
       var items = ""; 
       $.each(data, function (i, item) { 
        items += "<option value=\"" + item.Value + "\">" + item.Text + "</option>"; 
       }); 

       $("#SEATId").html(items); 
      } 
     }); 
    } 

    function getEstablishments(seat) { 
     $.ajax({ 
      url: "@Url.Action("SelectEstablishments", "Location")", 
      data: { seatId: seat }, 
      dataType: "json", 
      type: "POST", 
      error: function() { 
       alert("An error occurred."); 
      }, 
      success: function (data) { 
       var items = ""; 
       $.each(data, function (i, item) { 
        items += "<option value=\"" + item.Value + "\">" + item.Text + "</option>"; 
       }); 

       $("#EstablishmentId").html(items); 
      } 
     }); 
    } 

    function getProperties(estab) { 
     $.ajax({ 
      url: "@Url.Action("SelectProperties", "Location")", 
      data: { estabId: estab }, 
      dataType: "json", 
      type: "POST", 
      error: function() { 
       alert("An error occurred."); 
      }, 
      success: function (data) { 
       var items = ""; 
       $.each(data, function (i, item) { 
        items += "<option value=\"" + item.Value + "\">" + item.Text + "</option>"; 
       }); 

       $("#PropertyId").html(items); 
      } 
     }); 
    } 

    $(document).ready(function() { 
     $("#AreaId").change(function() { 
      var area = $("#AreaId").val(); 
      getSEATs(area); 
     }); 
     $("#SEATId").change(function() { 
      var seat = $("#SEATId").val(); 
      getEstablishments(seat); 
     }); 
     $("#EstablishmentId").change(function() { 
      var estab = $("#EstablishmentId").val(); 
      getProperties(estab); 
     }); 
    });  
</script> 
<div class="control-group"> 
    @Html.LabelFor(m => m.AreaId, new { @class = "control-label" }) 
    <div class="controls"> 
     <div> 
      @Html.DropDownListFor(m => m.AreaId, new SelectList(Model.Areas, "ID", "Description", -1), "-- Please Select -- ") 
     </div> 
    </div> 
</div> 
<div class="control-group"> 
    @Html.LabelFor(m => m.SEATId, new { @class = "control-label" }) 
    <div class="controls"> 
     <div> 
      @Html.DropDownListFor(m => m.SEATId, new SelectList(Model.SEATs, "ID", "Description", -1)) 
     </div> 
    </div> 
</div> 
<div class="control-group"> 
    @Html.LabelFor(m => m.EstablishmentId, new { @class = "control-label" }) 
    <div class="controls"> 
     <div> 
      @Html.DropDownListFor(m => m.EstablishmentId, new SelectList(Model.Establishments, "ID", "Description", -1)) 
     </div> 
    </div> 
</div> 
<div class="control-group"> 
    @Html.LabelFor(m => m.PropertyId, new { @class = "control-label" }) 
    <div class="controls"> 
     <div> 
      @Html.DropDownListFor(m => m.PropertyId, new SelectList(Model.Properties, "ID", "Description", -1)) 
      @Html.ValidationMessageFor(m => m.PropertyId) 
     </div> 
    </div> 
</div> 

當我提交我的主要形式驗證的場發射了主視圖，而不是局部的視圖。誰能告訴我爲什麼？

謝謝， 保羅。

Answer 1

由於屬性字段是一個不可爲空的int，所以該字段將始終設置爲某個值。 required屬性只檢查空或空字段，而不檢查默認值。您需要將該屬性的類型更改爲int？，並將默認值設置爲null。