显示不同的字段EditorForModel主场迎战MVC2 DisplayForModel模式 [英] Showing Different fields in EditorForModel vs. DisplayForModel modes in MVC2

问题描述

我有一个 INT STATEID 字段和字符串Statename的字段，像这样一个视图模型：

I have a viewmodel that has an int StateID field and a string StateName field like so:

public class DepartmentViewModel : BaseViewModel, IModelWithId
{
    // only show in edit mode
    public int StateId { get; set; }

    // only show in display mode
    public string StateName { get; set; }
}

我有一个只读查看使用 DisplayForModel 和使用更新视图 EditorForModel 。我想在 DisplayForModel 视图显示 Statename的属性和 EditorForModel 视图中使用 STATEID 属性（我其实呈现在此基础上一个DropDownList）。

I have a read only view that uses DisplayForModel and an update view that uses EditorForModel. I want the DisplayForModel view to show the StateName property, and the EditorForModel view use the StateID property (I am actually rendering a dropdownlist based on this).

我一直无法弄清楚如何装点我的ViewModel属性来创建此行为。

I have not been able to figure out how to decorate my viewmodel properties to create this behavior.

推荐答案

我想一个解决方案，更通用的，所以我创建了一个新的属性：

I wanted a solution that was more generic, so I created a new attribute:

[AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
public sealed class RenderModeAttribute : Attribute
{
    public RenderMode RenderMode { get; set; }

    public RenderModeAttribute(RenderMode renderMode)
    {
        RenderMode = renderMode;
    }
}

public enum RenderMode
{
    Any,
    EditModeOnly,
    DisplayModeOnly
}

和包含在我的自定义DataAnnotationsModelMetadataProvider以下code：

And included the following code in my custom DataAnnotationsModelMetadataProvider:

var renderModeAttribute = attributes.OfType<RenderModeAttribute>();
if (renderModeAttribute.Any())
{
    var renderMode = renderModeAttribute.First().RenderMode;
    switch (renderMode)
    {
        case RenderMode.DisplayModeOnly:
            metadata.ShowForDisplay = true;
            metadata.ShowForEdit = false;
            break;
        case RenderMode.EditModeOnly:
            metadata.ShowForDisplay = false;
            metadata.ShowForEdit = true;
            break;
    }
}

所以，我可能只是装点我的模型像这样：

So that I could just decorate my model as so:

public class DepartmentViewModel    
{     
    [RenderMode(RenderMode.EditModeOnly)]   
    public int StateId { get; set; }     

    [RenderMode(RenderMode.DisplayModeOnly)]    
    public string StateName { get; set; }     
} 

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