如何获取sharepoint网站的根目录的本地路径?

您可以通过查询站点上的IisSettings集合来确定Web应用程序的物理本地路径。

例如:

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;

namespace WSStest
{
  class Program
  {
    static void Main(string[] args)
    {
      using (SPSite site = new SPSite("http://<YOURSITE>"))
      {
        string localPath = site.WebApplication.IisSettings[SPUrlZone.Default].Path.ToString();
        Console.WriteLine("Local path: " + localPath);
      }
    }
  }
}