C#获取当前文件的路经

string fileName = "\\超市商品采购管理.doc";//路径自己可以换成ppt、mp3、wmv、jpg、rmvb等等格式的文件，都可以
            string stmp = Assembly.GetExecutingAssembly().Location;
            stmp = stmp.Substring(0, stmp.LastIndexOf('\\'));//删除文件名
            stmp = stmp.Substring(0, stmp.LastIndexOf('\\'));
            stmp = stmp.Substring(0, stmp.LastIndexOf('\\'));
            stmp += fileName;
            stmp = @stmp;
            Process.Start(stmp);

添加命名空间

using System.Diagnostics;
using System.Reflection;