如何延迟使用linq到SQL外部映射加载属性? [英] How to delay loading a property with linq to sql external mapping?

问题描述

我有一个表，其中包含一些我不想默认加载的Blob字段.

I have a table that contains some blob fields that I don't want to load by default.

在dbml文件中，可以为此类字段设置延迟加载"属性.

In a dbml file it is possible to set the delay loaded property for such fields.

外部映射文件是否有类似的选择?

Is there a similar option for external mapping files?

推荐答案

我不熟悉外部映射文件"，但这基本上就是您使用LINQ-to-SQL进行延迟加载的方式:

I'm not familiar with "external mapping files", but this is basically how you do lazy loading with LINQ-to-SQL:

    private System.Data.Linq.Link<String> _content;
    [Column(Name = "content", DbType = "NVarChar(MAX) NOT NULL", Storage = "_content")]
    public String Content
    {
        get { return this._content.Value; }
        set { this._content.Value = value; }
    }

使用System.Data.Linq.Link<String>作为私有变量会导致该属性被延迟加载，除非在DataContext上禁用了延迟加载.

Using System.Data.Linq.Link<String> as the private variable causes that property to be delay loaded, unless delay loading is disabled on the DataContext.

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