如何使用 Entity Framework C# 获取与特定表相关的表名

Question

如何使用 Entity Framework C# 获取与特定表有关系的表名？

   List<string> results = db.Database.SqlQuery<string>("SELECT name, OBJECT_NAME(parent_object_id) FROM sys.foreign_keys WHERE referenced_object_id = OBJECT_ID('" + currentmodel + "')").ToList();

Answer 1

您可以使用EF SqlQuery + sys.foreign_keys join sys.tables来做到这一点。

public IList<ForeignTableViewModl> QueryForeignTable(string tableName)
{
    using(var db = new Db())
    {
        var sql = @"
select
    fk.name as [FkName],
    tp.name as [ParentTable],
    tr.name as [RefrencedTable]
from sys.foreign_keys fk
inner join sys.tables tp on fk.parent_object_id = tp.object_id
inner join sys.tables tr on fk.referenced_object_id = tr.object_id
where tp.name = @p0
    ";
        return db.Database.SqlQuery<ForeignTableViewModl>(sql, tableName).ToList();
    }

}

public class ForeignTableViewModl
{
    public string FkName { get; set; }  
    public string ParentTable { get; set; } 
    public string RefrencedTable { get; set; }  
}

它会得到北风演示数据库的结果，如：

---

已完成，但此查询仅返回前 3 个 FK 我想返回所有 FK

public IList<ForeignTableViewModl> QueryForeignTable(string tableName)
{
    using(var db = new Db())
    {
        var sql = @"
select
    fk.name as [FkName],
    tp.name as [ParentTable],
    tr.name as [RefrencedTable]
from sys.foreign_keys fk
inner join sys.tables tp on fk.parent_object_id = tp.object_id
inner join sys.tables tr on fk.referenced_object_id = tr.object_id
where tp.name = @p0 or tr.name = @p0
    ";
        return db.Database.SqlQuery<ForeignTableViewModl>(sql, tableName).ToList();
    }

}