excel文件主要是输出html代码。以xls的文本格式保存文件。 生成excel格式的代码： [code lang="CSharp"] /// <summary> /// 输出excel格式的html代码 /// </summary> /// <param name="dt"></param> /// <param name="fileName"></param> /// <param name="tableHeader"></param> /// <param name="UseDefinedHeader"></param> /// <returns></returns> public string MakeExcelStr(DataTable dt, string fileName, string[] tableHeader,bool UseDefinedHeader) { StringBuilder strResult = new StringBuilder(); int iColCount = dt.Columns.Count; if (dt.Columns.Count == 0) return strResult.ToString(); strResult.Append("<table cellspacing=\"0\" cellpadding=\"5\" rules=\"all\" border=\"1\">"); strResult.Append("<tr style=\"font-weight: bold; white-space: nowrap;\">"); if (UseDefinedHeader)//是否是用户自定义表头 { for (int i = 0; i < tableHeader.Length; i++) { strResult.Append("<td style=\"text-align:center\">" + tableHeader[i] + "</td>");//让文本居中显示 } } else { for (int i = 0; i < iColCount; i++) { strResult.Append("<td style=\"text-align:center\">" + (dt.Columns[i] + "").ToString() + "</td>"); } } strResult.Append("</tr>"); foreach (DataRow dr in dt.Rows) { strResult.Append("<tr>"); for (int i = 0; i < iColCount; i++) { // style=\"vnd.ms-excel.numberformat:@\" strResult.Append("<td style=\"vnd.ms-excel.numberformat:@\">'" + (dr[i] + "").ToString() + "</td>");//设置单元格是文本格式（防止文本是科学计算法，即E+***这种情况） } strResult.Append("</tr>"); } strResult.Append("</table>"); return strResult.ToString(); } [/code] 把生成的excel格式的代码保存成excel文件的方法 [code lang="CSharp"] /// <summary> /// 导出excel表格 /// </summary> /// <param name="dt"></param> /// <param name="fileName"></param> /// <param name="tableHeader">表头</param> /// <param name="Defined">是否自定义表头</param> private void ExprotToExcel(DataTable dt, string fileName, string[] tableHeader, bool Defined) { DogManage.Common.ExcelHelper excelHelper = new DogManage.Common.ExcelHelper(); string result = excelHelper.MakeExcelStr(dt, fileName, tableHeader,Defined); HttpContext.Current.Response.Clear(); System.IO.StringWriter sw = new System.IO.StringWriter(); sw.Write(result); sw.Close(); string str2 = HttpUtility.UrlEncode(fileName + "_" + DateTime.Now.ToString("yyyy-MM-dd")); HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" +str2 + ".xls"); HttpContext.Current.Response.ContentType = "application/ms-excel"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); HttpContext.Current.Response.Write(sw); HttpContext.Current.Response.End(); } [/code] 生成word的代码： [code lang="CSharp"] private void exportword() { Response.Clear(); Response.Buffer = true; Response.Charset = "utf-8"; Response.AppendHeader("Content-Disposition", "attachment;filename=tmp.doc"); Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8"); Response.ContentType = "application/ms-word"; this.EnableViewState = false; System.IO.StringWriter oStringWriter = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter); oHtmlTextWriter.WriteLine(hf.Value); Response.Write(oStringWriter.ToString()); Response.End(); } [/code] csv文件就是一个有特定格式的字符串拼接出来的文件，每个列通过,分割开来。换行则两外输出一行文本就行了 生成csv文件的代码： [code lang="CSharp"] /// <summary> /// 输出csv文件的代码 /// </summary> /// <param name="dt"></param> /// <param name="fileName"></param> /// <param name="tableHeader">表头</param> /// <returns></returns> public string MakeCSVStr(DataTable dt, string fileName, string[] tableHeader) { StringBuilder strResult = new StringBuilder(); string temp = string.Empty; int iColCount = dt.Columns.Count; if (iColCount == 0) return strResult.ToString(); for (int i = 0; i < iColCount; i++) { temp+="\"" + dt.Columns[i] + "\""; if (i < iColCount - 1) temp+=","; } strResult.AppendLine(temp); foreach (DataRow dr in dt.Rows) { temp = ""; for (int i = 0; i < iColCount; i++) { if (!Convert.IsDBNull(dr[i])) temp+="\"" + dr[i].ToString() + "\""; else temp += "\"\""; if (i < iColCount - 1) temp+=","; } strResult.AppendLine(temp); } return strResult.ToString(); } [/code] 导出csv文件的方法： [code lang="CSharp"] /// <summary> /// 导出csv文件 /// </summary> /// <param name="dt"></param> /// <param name="fileName"></param> /// <param name="tableHeader">表头</param> /// <param name="Defined">是否自定义表头</param> private void ExprotToCSV(DataTable dt,string fileName, string[] tableHeader) { DogManage.Common.ExcelHelper excelHelper = new DogManage.Common.ExcelHelper(); string result=excelHelper.MakeCSVStr(dt, fileName, tableHeader); HttpContext.Current.Response.Clear(); System.IO.StringWriter sw = new System.IO.StringWriter(); sw.Write(result); sw.Close(); HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName + ".csv"); HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); HttpContext.Current.Response.Write(sw); HttpContext.Current.Response.End(); } [/code]