asp.net導出excel

時間 2019-11-21

標籤 asp.net asp 導出 excel 欄目 ASP 简体版

原文原文鏈接

asp.net 根據html模板導出excelhtml

public class ExcelHelper
{
    /// <summary>
    /// 根據html模板文件生成excel文件
    /// </summary>
    /// <param name="ds">數據源</param>
    /// <param name="TemplateFilePath">html模板文件路徑（虛擬路徑而非物理路徑）</param>
    /// <param name="ToFileName">生成的excel文件名，帶後綴不帶路徑</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>
    /// 根據模板生成字符換
    /// </summary>
    /// <param name="ds"></param>
    /// <param name="TemplateFilePath"></param>
    /// <returns></returns>
    private static string GetStringFromTemplate(DataSet ds, string TemplateFilePath)
    {
        //讀取模板
        string TemplateContent = "";
        using (StreamReader sr = new StreamReader(HttpContext.Current.Server.MapPath(TemplateFilePath)))
        {
            TemplateContent = sr.ReadToEnd();
        }
        
        //解析每一個表
        for (int TableIndex = 0; TableIndex < ds.Tables.Count; TableIndex++)
        {
            DataTable dt = ds.Tables[TableIndex];
            //獲取表的模板集合
            string TableTag = string.Format(@"#table.{0}#", TableIndex);//表的標籤
            string pattern = string.Format(@"#table\.{0}#.*?#table\.{0}#", TableIndex);
            Regex reg = new Regex(pattern, RegexOptions.Singleline);
            MatchCollection matchs = reg.Matches(TemplateContent);
            //解析每一個模板
            foreach (Match match in matchs)
            {
                string tableTemplate = match.Value;
                string table = "";//解析後內容
                                  //解析每行數據
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    string rowTemplate = tableTemplate.Replace(TableTag, "");//去掉模板標籤
                                                                             //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;
                }
                //解析完以後替換到模板
                TemplateContent = TemplateContent.Replace(tableTemplate, table);
            }
        }
        return TemplateContent;
    }
}

html模板格式asp.net

<!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;">事件彙總表</td></tr>
        <tr>
            <td style="width:200px;">事件名稱</td>
            <td style="width:500px;">事件簡要狀況</td>
            <td style="width:100px;">發生時間</td>
            <td style="width:100px;">發生地區</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>

調用方式ui

string templatepath = SysHelper.GetVirtualPath() + "zfb/pro_list_excel.html",
　　outfile = "事件彙總表" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";

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

附加獲取應用程序虛擬目錄方法spa

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

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