创建新的线样式

        /// <summary>
        /// 创建新的线样式
        /// </summary>
        /// <param name="newColor"></param>
        /// <param name="weight"></param>
        /// <param name="linePatternId"></param>
        /// <returns></returns>
        private Category CreateNewLineType()
        {
            //获得设置里面的线
            Category lineCategory = doc.Settings.Categories.get_Item(BuiltInCategory.OST_Lines);
            //得到这个线下面所有的线样式
            var subcats = lineCategory.SubCategories;
            foreach (Category item in subcats)
            {
                if (item.Name == "标记线")
                {
                    //通过样式名称，查找我们自己设定的样式
                    _lineStyle = item;
                }
            }
            if (_lineStyle == null)
            {
                //所有的线型图案，即实线、中心线、点划线等
                //List<LinePatternElement> linePatternElements = new FilteredElementCollector(doc).OfClass(typeof(LinePatternElement)).Select(s => s as LinePatternElement).ToList();
                //LinePatternElement linePattern = linePatternElements.FirstOrDefault(x => x.Name == "划线");

                Category newCategory = null;
                newCategory = doc.Settings.Categories.NewSubcategory(lineCategory, "标记线");
                //设置线的颜色
                newCategory.LineColor = new Color(0,166,0);
                //设置线的线型
                //newCategory.SetLinePatternId(linePattern.Id, GraphicsStyleType.Projection);
                //设置线宽
                //newCategory.SetLineWeight(weight, GraphicsStyleType.Projection);
                return newCategory;
            }
            return _lineStyle;
        }

        /// <summary>
        /// 线样式
        /// </summary>
        private Category _lineStyle { get; set; }

//详情线设置线样式
DetailCurve.LineStyle = _lineStyle.GetGraphicsStyle(GraphicsStyleType.Projection)