asp.net导出excel

asp.net 根据html模板导出excel

public class ExcelHelper
{
    /// <summary>
    /// 根据html模板文件生成excel文件
    /// </summary>
    /// <param name="ds">数据源</param>
    /// <param name="TemplateFilePath">html模板文件路径（虚拟路径而非物理路径）</param>
    /// <param name="ToFileName">生成的excel文件名，带后缀不带路径</param>
    /// <returns></returns>
    public static string GetExcel(DataSet ds, string TemplateFilePath, string ToFileName)
    {
        string ToFilePath = SysHelper.GetVirtualPath() + "upload/export_excel/";
        string strOutPath = HttpContext.Current.Server.MapPath(ToFilePath);
        if (!Directory.Exists(strOutPath))
        {
            Directory.CreateDirectory(strOutPath);
        }

        string TemplateContent = GetStringFromTemplate(ds, TemplateFilePath);
        //保存文件
        using (FileStream fs = new FileStream(strOutPath + ToFileName, FileMode.Create))
        {
            using (StreamWriter sw = new StreamWriter(fs))
            {
                sw.Write(TemplateContent);
            }
        }
        return ToFilePath + ToFileName;
    }

    /// <summary>
    /// 根据模板生成字符换
    /// </summary>
    /// <param name="ds"></param>
    /// <param name="TemplateFilePath"></param>
    /// <returns></returns>
    private static string GetStringFromTemplate(DataSet ds, string TemplateFilePath)
    {
        //读取模板
        string TemplateContent = "";
        using (StreamReader sr = new StreamReader(HttpContext.Current.Server.MapPath(TemplateFilePath)))
        {
            TemplateContent = sr.ReadToEnd();
        }
        
        //解析每个表
        for (int TableIndex = 0; TableIndex < ds.Tables.Count; TableIndex++)
        {
            DataTable dt = ds.Tables[TableIndex];
            //获取表的模板集合
            string TableTag = string.Format(@"#table.{0}#", TableIndex);//表的标签
            string pattern = string.Format(@"#table.{0}#.*?#table.{0}#", TableIndex);
            Regex reg = new Regex(pattern, RegexOptions.Singleline);
            MatchCollection matchs = reg.Matches(TemplateContent);
            //解析每个模板
            foreach (Match match in matchs)
            {
                string tableTemplate = match.Value;
                string table = "";//解析后内容
                                  //解析每行数据
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    string rowTemplate = tableTemplate.Replace(TableTag, "");//去掉模板标签
                                                                             //解析行模板
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        string ColumnName = "#table." + TableIndex + "." + dt.Columns[j].ColumnName + "#";
                        rowTemplate = rowTemplate.Replace(ColumnName, dt.Rows[i][j].ToString());
                    }
                    table += rowTemplate;
                }
                //解析完之后替换到模板
                TemplateContent = TemplateContent.Replace(tableTemplate, table);
            }
        }
        return TemplateContent;
    }
}

html模板格式

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
</head>
<body>
    <table border="1">
        <tr><td colspan="4" style="text-align:center;">事件汇总表</td></tr>
        <tr>
            <td style="200px;">事件名称</td>
            <td style="500px;">事件简要情况</td>
            <td style="100px;">发生时间</td>
            <td style="100px;">发生地区</td>
        </tr>
        #table.0#
        <tr>
            <td>#table.0.omtb_title#</td>
            <td>#table.0.omtb_content#</td>
            <td>#table.0.omtb_date#</td>
            <td>#table.0.omtb_address#</td>
        </tr>
        #table.0#
    </table>
</body>
</html>

调用方式

string templatepath = SysHelper.GetVirtualPath() + "zfb/pro_list_excel.html",
　　outfile = "事件汇总表" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";

string excel_file_path = ExcelHelper.GetExcel(dsSource, templatepath, outfile);

附加获取应用程序虚拟目录方法

public class SysHelper
{
    public static string GetVirtualPath()
    {
        string path = HttpContext.Current.Request.ApplicationPath;
        return path + (path != "/" ? "/" : "");　　//以/结尾
    }
}

asp.net导出excel

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