/// <summary>

/// DataSet导出到Excel文件（多个Sheet）

/// </summary>

/// <param name="dataSet">DataSet</param>

/// <param name="fileName">文件名称</param>

/// <returns>导出是否成功</returns>

public static bool DataSetToExcel(DataSet dataSet, string fileName)

{

    if (dataSet == null) return false;

    if (dataSet.Tables.Count < ) return false;

    if (dataSet.Tables[] == null) return false;

    if (string.IsNullOrWhiteSpace(fileName)) return false;

    try

    {

        ExecDataSetToExcel(dataSet, fileName);

        return true;

    }

    catch (Exception ex)

    {

        //DO LOG

        return false;

    }

}

//执行 DataSet 导出

private static void ExecDataSetToExcel(DataSet dataSet, string fileName)

{

    HttpResponse httpResponse = HttpContext.Current.Response;

    httpResponse.Clear();

    httpResponse.Charset = "utf-8";

    httpResponse.ContentType = "text/xml";

    httpResponse.ContentEncoding = System.Text.Encoding.UTF8;

    httpResponse.AppendHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, Encoding.UTF8) + ".xls");

    StringBuilder sb = new StringBuilder();

    for (int i = ; i < dataSet.Tables.Count; i++)

    {

        System.Data.DataTable dt = dataSet.Tables[i];

        //新建Sheet

        string sheetName = string.IsNullOrWhiteSpace(dt.TableName) ? "Sheet" + (i + ) : dt.TableName;

        sb.Append("<Worksheet ss:Name='" + sheetName + "'>");

        sb.Append("<Table x:FullColumns='1' x:FullRows='1' ss:DefaultColumnWidth='118'>");

        //输出标题行

        sb.Append("<Row ss:AutoFitHeight='1'>");

        for (int j = ; j < dt.Columns.Count; j++) sb.Append("<Cell ss:StyleID='header'><Data ss:Type='String'>" + dt.Columns[j].ColumnName + "</Data></Cell>");

        sb.Append("</Row>");

        //输入内容行

        for (int k = ; k < dt.Rows.Count; k++)

        {

            sb.Append("<Row>");

            for (int l = ; l < dt.Columns.Count; l++)

            {

                //Type ct = dt.Columns[l].DataType;

                //sb.Append("<Cell ss:StyleID='body'><Data ss:Type='Number'>" + dt.Rows[k][l] + "</Data></Cell>"); //数字类型

                sb.Append("<Cell ss:StyleID='body'><Data ss:Type='String'>" + dt.Rows[k][l] + "</Data></Cell>");

            }

            sb.Append("</Row>");

        }

        sb.Append("</Table>");

        sb.Append("</Worksheet>");

    }

    string excelXmlDoc = CreateExcelXmlDoc(sb.ToString());

    httpResponse.Write(excelXmlDoc);

    httpResponse.Flush();

    httpResponse.End();

}

//创建Excel文档对应的XML字符串

private static string CreateExcelXmlDoc(string worksheetXml)

{

    StringBuilder sb = new StringBuilder();

    sb.Append("<?xml version='1.0'?><?mso-application progid='Excel.Sheet'?>");

    sb.Append("<Workbook xmlns='urn:schemas-microsoft-com:office:spreadsheet' xmlns:o='urn:schemas-microsoft-com:office:office'"

        +"xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns:ss='urn:schemas-microsoft-com:office:spreadsheet'"

        +"xmlns:html='http://www.w3.org/TR/REC-html40'>");

    //文档属性

    sb.Append("<DocumentProperties xmlns='urn:schemas-microsoft-com:office:office'>"

        + "<Author>Unitech</Author><LastAuthor>Unitech</LastAuthor><Created></Created><LastSaved></LastSaved><Version>12.00</Version>"

        + "</DocumentProperties>");

    //样式

    sb.Append("<Styles>");

    sb.Append("<Style ss:ID='header'>"

        + "<Font ss:FontName='宋体' x:CharSet='134' ss:Size='10' ss:Color='#000000' ss:Bold='0'/>"

        + "<Alignment ss:Horizontal='Center' ss:Vertical='Center'/>"

        + "<Interior ss:Color='#d8d8d8' ss:Pattern='Solid'/>"

        + "<Borders>"

        + "<Border ss:Position='Bottom' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Left' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Right' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Top' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "</Borders></Style>");

    sb.Append("<Style ss:ID='body'>"

        + "<Font ss:FontName='宋体' x:CharSet='134' ss:Size='10' ss:Color='#000000'/>"

        + "<Alignment ss:Vertical='Center'/>"

        + "<NumberFormat ss:Format='@'/>"

        + "<Borders>"

        + "<Border ss:Position='Bottom' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Left' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Right' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "<Border ss:Position='Top' ss:LineStyle='Continuous' ss:Weight='1' ss:Color='#bfbfbf'/>"

        + "</Borders></Style>");

    sb.Append("</Styles>");

    //Work Sheet

    sb.Append(worksheetXml);

    sb.Append("</Workbook>");

    return sb.ToString();

}