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显示EditorForModel中的不同字段与MVC2中的DisplayForModel模式

editorformodel asp.net-mvc

CodeGrue · 技术社区 · 16 年前

int StateID string StateName 像这样的领域:

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; }
}

我有一个只读视图 DisplayForModel 以及使用 EditorForModel . 我想要那个 显示模式 StateName 财产,以及 编辑FORMODEL StateID

4 回复 | 直到 16 年前

Bridget the Midget 14 年前

新属性将类似于:

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

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

    public void OnMetadataCreated(ModelMetadata metadata)
    {
        switch (RenderMode)
        {
            case RenderMode.DisplayModeOnly:
                metadata.ShowForDisplay = true;
                metadata.ShowForEdit = false;
                break;

            case RenderMode.EditModeOnly:
                metadata.ShowForDisplay = false;
                metadata.ShowForEdit = true;
                break;

            case RenderMode.None:
                metadata.ShowForDisplay = false;
                metadata.ShowForEdit = false;
                break;
        }
    }
}

public enum RenderMode
{
    Any,
    EditModeOnly,
    DisplayModeOnly
}

CodeGrue 16 年前

我想要一个更通用的解决方案,所以我创建了一个新属性:

[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
}

并在自定义DataAnnotationsModelMetadataProvider中包含以下代码:

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;
    }
}

这样我就可以把我的模型装饰成:

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

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

Rodrigo Juarez 15 年前

public class CustomModelMetadataProvider : DataAnnotationsModelMetadataProvider
{
    protected override ModelMetadata CreateMetadata(System.Collections.Generic.IEnumerable<System.Attribute> attributes, System.Type containerType, System.Func<object> modelAccessor, System.Type modelType, string propertyName)
    {
        var metadata = base.CreateMetadata(attributes, containerType, modelAccessor, modelType, propertyName);

        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;

                case RenderMode.None:
                    metadata.ShowForDisplay = false;
                    metadata.ShowForEdit = false;
                    break;
            }
        } 

        return metadata;
    }
}

Darin Dimitrov 16 年前

覆盖模板:

在 ~/Shared/EditorTemplates/DepartmentViewModel.ascx

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Namespace.DepartmentViewModel>" %>
<%= Html.LabelFor(x => x.StateId) %>
<%= Html.TextBoxFor(x => x.StateId) %>

在你的 ~/Shared/DisplayTemplates/DepartmentViewModel.ascx :

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Namespace.DepartmentViewModel>" %>
<div><%= Html.Encode(Model.StateName) %></div>