终于结局了,很不好意思,写错了,执行数据库后,获取0列的数据应该是
var sql = "select count(*) from [LgCoursewareDB].[dbo].[LgCourseware_PhysicalMaterial] where Name = '" + mingcheng + "' and Model ='定义'";
alert(sql);
var jieguo = con.Execute(sql);
var nCount = jieguo.Fields(0).value;