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excel 导出 多个sheet页

如何将多个组好的文本如下
(<html><head><title></title></head><body>里面是带样式的table</body></html>)
导入到各个sheet页 --------------------编程问答--------------------  /// <summary>        /// 将DataTable转换为WorkSheet        /// </summary>        /// <param name="dataTable"></param>        /// <returns></returns>        private static string TableToWorksheet(DataTable dataTable)        {            if (null==dataTable||dataTable.Rows.Count==0)            {                return string.Empty;            }            StringBuilder stringBuilder = new StringBuilder();            stringBuilder.Append("<Worksheet ss:Name='" + dataTable.TableName.ToString() + "'>");            stringBuilder.Append("<Table x:FullColumns='1' x:FullRows='1'>");            //输出标题                                          stringBuilder.Append("rn<Row ss:AutoFitHeight='1'>");            foreach (DataColumn tableColumn in dataTable.Columns)            {                stringBuilder.AppendFormat("<Cell ss:StyleID='Header'><Data ss:Type='String'>{0}</Data></Cell>", tableColumn.ColumnName.ToString());            }            stringBuilder.Append("rn</Row>");            foreach(DataRow row in dataTable.Rows)            {                stringBuilder.Append("<Row>");                foreach (DataColumn tableColumn in dataTable.Columns)                {                    stringBuilder.AppendFormat("<Cell ss:StyleID='border'><Data ss:Type='String'>{0}</Data></Cell>", row[tableColumn].ToString());                      }                stringBuilder.Append("</Row>");            }            stringBuilder.Append("</Table>");            stringBuilder.Append("</Worksheet>");            return stringBuilder.ToString();                } --------------------编程问答-------------------- 是组好的字符串
(<html><head><title></title></head><body>带样式的table</body></html>)
导入到各个sheet页
补充:.NET技术 ,  ASP.NET
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