autocad.netQQ群：193522571属性块中属性文字宽度比例自动调整到格子宽度内，比例因子小于标准比例因子的自动设置为标准比例因子

        #region 属性自动缩进
        /// <summary>
        /// 属性比例因子设置
        /// </summary>
        /// <param name="br">属性块参照</param>
        /// <param name="lstWidth">属性宽度集合</param>
        /// <param name="Factor">标准比例因子</param>
        public static void setAttributeReferenceWidth(this BlockReference br, List<double> lstWidth,double Factor)
        {
            //定义事务对象
            var trans = br.Id.Database.TransactionManager; 
            //初始化计数器
            int i = 0;
            //在每个属性中循环
            foreach (ObjectId attId in br.AttributeCollection)
            {
                // 获取块参照属性对象
                AttributeReference attRef = (AttributeReference)trans.GetObject(attId, OpenMode.ForRead);
                //打开能属性对象
                attRef.UpgradeOpen();
                //如果属性对象不为空
                if (attRef.TextString != "")
                {
                    //属性比例因子
                    double nowFactor = attRef.WidthFactor;
                    //属性宽度
                    double attributeWidth = Math.Abs(attRef.GeometricExtents.MaxPoint.X - attRef.GeometricExtents.MinPoint.X);
                    attributeWidth=attributeWidth/nowFactor;
                    //标准宽度
                    double standardWidth=attributeWidth*Factor;
                    //如果属性宽度超出了指定宽度则修改属性宽度因子
                    if (standardWidth > lstWidth[i]-2)
                    {
                        double calFactor = (lstWidth[i]-2)/ standardWidth;
                        attRef.WidthFactor = Factor * calFactor;
                    }
                    //如果未超出则将比例因子统一为标准比例因子
                    else
                    {
                        attRef.WidthFactor = Factor;
                    }
                }
                attRef.DowngradeOpen();
                i++;
            }
        }
        #endregion