利用Office自带的OWC可以实现图表的输出，下面的代码做了下简单的封装。

using System;
using System.Data;
using System.Text;
using System.Drawing;

namespace doHope.OWCC
{
    /// <summary>
    /// 封装OWC做统计图
    /// by cherish58
    /// </summary>
    public class OWCChart
    {
        #region 属性

        private string _phaysicalimagepath;
        private string _title;
        private string _seriesname;
        private int _picwidth;
        private int _pichight;
        private DataTable _datasource;
        private string _strdatasource;
        private string strCategory;
        private string strValue;

        /// <summary>
        /// 图片存放路径
        /// </summary>
        public string PhaysicalImagePath
        {
            set{_phaysicalimagepath=value;}
            get{return _phaysicalimagepath;}
        }

        public string Title
        {
            set{_title=value;}
            get{return _title;}
        }

        public string SeriesName
        {
            set{_seriesname=value;}
            get{return _seriesname;}
        }

        public int PicWidth
        {
            set{_picwidth=value;}
            get{return _picwidth;}
        }

        public int PicHight
        {
            set{_pichight=value;}
            get{return _pichight;}
        }

        /// <summary>
        /// 传DataTable类型
        /// </summary>
        public DataTable DataSource
        {
            set
            {
                _datasource=value;
                strCategory=GetColumnsStr(_datasource);
                strValue=GetValueStr(_datasource);
            }
            get{return _datasource;}
        }

        /// <summary>
        /// 传字符串，分隔用分号(;)
        /// </summary>
        public string strDataSource
        {
            set
            {
                _strdatasource = value ;
                strCategory=GetColumnsStr(_strdatasource);
                strValue=GetValueStr(_strdatasource);
            }
            get{return _strdatasource;}
        }

        private string GetColumnsStr(DataTable dt)
        {
            StringBuilder strList=new StringBuilder();
            foreach(DataRow r in dt.Rows)
            {
                strList.Append(r[0].ToString()+'\t');
            }
            return strList.ToString();
        }

        private string GetColumnsStr(string coldt)
        {
            return coldt == "" ? "" : coldt.Substring(0,coldt.IndexOf(";")) ;
        }

        private string GetValueStr(DataTable dt)
        {
            StringBuilder strList=new StringBuilder();
            foreach(DataRow r in dt.Rows)
            {
                strList.Append(r[1].ToString()+'\t');
            }
            return strList.ToString();
        }

        private string GetValueStr(string rowdt)
        {
            return rowdt == "" ? "" : rowdt.Substring(rowdt.LastIndexOf(";")+1) ;
        }

        #endregion

        #region 构造函数

        /// <summary>
        /// 0
        /// </summary>
        public OWCChart()
        {
            //
        }        

        /// <summary>
        /// 1
        /// </summary>
        /// <param name="PhaysicalImagePath"></param>
        /// <param name="Title"></param>
        /// <param name="SeriesName"></param>
        /// <param name="PicWidth"></param>
        /// <param name="PicHight"></param>
        public OWCChart(string PhaysicalImagePath,string Title,string SeriesName,int PicWidth,int PicHight)
        {
            _phaysicalimagepath=PhaysicalImagePath;
            _title=Title;
            _seriesname=SeriesName;
            _pichight = PicHight ;
            _picwidth = PicWidth ;
        }

        /// <summary>
        /// 2
        /// </summary>
        /// <param name="Title"></param>
        /// <param name="SeriesName"></param>
        /// <param name="PicWidth"></param>
        /// <param name="PicHight"></param>
        public OWCChart(string Title,string SeriesName,int PicWidth,int PicHight)
        {
            _title=Title;
            _seriesname=SeriesName;
            _pichight = PicHight ;
            _picwidth = PicWidth ;
        }

        #endregion
 
        柱形图

        线性图

        条形图(横向)

        饼图
    }
}