发现数据库对象的依赖关系

SQL Server Management Studio中有一个很有意思的工具，可以查看某个对象的依赖和被依赖关系。如下图所示

假设，我们自己的程序也要实现这样的功能，那么该怎么做呢？

1. 首先，创建一个项目，添加以下三个引用

2. 用如下代码测试

using System;
using System.Collections.Generic;
using System.Text;

using Microsoft.SqlServer.Management.Smo;

namespace DiscovDepedency
{
    class Program
    {
        /// <summary>
        /// 这个程序演示了如何发现数据库对象的依赖关系
        /// 作者：陈希章
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            Server svr = new Server("localhost");
            Database db = svr.Databases["Northwind"];

            Table tb = db.Tables["Orders"];

            DependencyWalker walker = new DependencyWalker(svr);//这是检测关系的一个工具

            //检测依赖该对象的所有其他对象
            Console.WriteLine("依赖Orders表的所有对象");
            DependencyTree tree = walker.DiscoverDependencies(new[] { tb }, DependencyType.Children);
            foreach (var item in walker.WalkDependencies(tree))
            {
                var xpath = item.Urn.XPathExpression;
                var type = item.Urn.Type;

                Console.WriteLine("\tType:{0},Name:{1}", type, string.Format("{0}.{1}",xpath.GetAttribute("Schema",type),xpath.GetAttribute("Name",type)));
            }

            Console.WriteLine("Orders表所依赖的其他对象");
            DependencyTree tree2 = walker.DiscoverDependencies(new[] { tb }, DependencyType.Parents);
            foreach (var item in walker.WalkDependencies(tree2))
            {
                var xpath = item.Urn.XPathExpression;
                var type = item.Urn.Type;

                Console.WriteLine("\tType:{0},Name:{1}", type, string.Format("{0}.{1}", xpath.GetAttribute("Schema", type), xpath.GetAttribute("Name", type)));
            }

            Console.Read();

        }
    }
}