CS1061:不包含针对的定义 [英] CS1061: does not contain a definition for

问题描述

为什么会出现此错误?当然，我的第一个模型中不存在SelectIssuePriority.我已经添加了.

Why I get this error? Of course SelectIssuePriority doesn't exist on my first model. I have add it.

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: 'Devcore' does not contain a definition for 'SelectIssuePriority' and no extension method 'SelectIssuePriority' accepting a first argument of type 'Devcore.' could be found (are you missing a using directive or an assembly reference?)

Source Error:


Line 77: 
Line 78:         <div class="editor-label">
Line 79:             <%: Html.LabelFor(model => model.SelectIssuePriority) %>
Line 80:         </div>
Line 81:         <div class="editor-field">

型号

namespace Devcore.Models
{
    [MetadataType(typeof(IssueMetaData))]
    public partial class Issue
    {

    }


    public class IssueMetaData 
    {
        [Required(ErrorMessage="Summary is required",AllowEmptyStrings = false)]
        public string Summary { get; set; }


        [Display(Name = "Priority")]
        [Required(ErrorMessage = "Priority is required", AllowEmptyStrings = false)]
        public string SelectIssuePriority { get; set; }
    }
 }

Aspx

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

推荐答案

IIRC，这些MetaData扩展类仅用于验证.如果您的基本模型没有这些属性，那么它将无法正常工作.

IIRC, those MetaData extension classes are purely for validation. If your base model doesn't have those properties.. it won't work.

因此，您需要此视图才能接受存在的属性:

So you need this for the view to accept that properties exist:

[MetadataType(typeof(IssueMetaData))]
public partial class Issue
{
    public string SelectIssuePriority { get; set; }
}

并且您需要MetaData类用于DataAnnotations以便进行模型验证.

And you need the MetaData class for the DataAnnotations to work with model validation.

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