求一个导出excel示例代码

Question

不依靠控件,有条件导出.
求高人指点~

Answer 1

/// <summary>
        /// 将Web控件导出
        /// </summary>
        /// <param name="source">控件实例</param>
        /// <param name="type">类型:Excel或Word</param>
        public void ExpertControl(System.Web.UI.Control source, DocumentType type)
        {
            //设置Http的头信息,编码格式
            if (type == DocumentType.Excel)
            {
                //Excel
                Response.AppendHeader("Content-Disposition","attachment;filename=result.xls");
                Response.ContentType = "application/ms-excel";
            }
            else if (type == DocumentType.Word)
            {
                //Word
                Response.AppendHeader("Content-Disposition","attachment;filename=result.doc");
                Response.ContentType = "application/ms-word";
            }
            Response.Charset = "UTF-8";  
            Response.ContentEncoding = System.Text.Encoding.UTF8;             //关闭控件的视图状态
            source.Page.EnableViewState =false;              //初始化HtmlWriter
            System.IO.StringWriter writer = new System.IO.StringWriter() ;
            System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(writer);
            source.RenderControl(htmlWriter);             //输出
            Response.Write(writer.ToString());
            Response.End();
        }        //文档类型
        public enum DocumentType
        {
            Word,
            Excel
        }
/// <summary>
/// 导出Excel
/// </summary>
/// <param name="ds">Dataset</param>
/// <param name="FileName">文件名，包括后缀。如：xxx.xls</param>
public void CreateExcel(DataSet ds, string FileName)
{
    HttpResponse resp;
    resp = Page.Response;
    FileName = Page.Server.UrlEncode(FileName); //文件名编码，否则出现乱码
    resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
    resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
    string colHeaders = "", ls_item = "";
    //定义表对象与行对象，同时用DataSet对其值进行初始化 
    DataTable dt = ds.Tables[0];    DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
    int i = 0;    int cl = dt.Columns.Count;
    //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符 
    colHeaders = "姓名\t性别\n";
    resp.Write(colHeaders);
    //向HTTP输出流中写入取得的数据信息 
    //逐行处理数据   
    foreach (DataRow row in myRow)
    {
        //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据     
        ls_item += row["Uname"].ToString() + "\t" + row["Usex"].ToString() + "\n";
        resp.Write(ls_item);
        ls_item = "";
    }
    resp.End();
}
dataset 导出excel.条件就是你查询出的dataset..

Answer 2

 /// <summary>
        /// 导出Execl
        /// </summary>
        /// <param name="dta"></param>
        /// <param name="FileName"></param>
        public static void CreateExcel(System.Data.DataTable dta, string FileName, HttpResponse httpResponse)
        {
            HttpResponse resp;
            resp = httpResponse;
            FileName = System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(FileName));
            resp.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName + ".xls");
            StringBuilder colHeaders = new StringBuilder();
            StringBuilder ls_item = new StringBuilder();            //定义表对象与行对象，同时用DataSet对其值进行初始化 
            System.Data.DataTable dtt = dta;
            DataRow[] myRow = dtt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的            int i = 0;
            int cl = dtt.Columns.Count;            //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符 
            for (i = 0; i < cl; i++)
            {
                if (i == (cl - 1))//最后一列，加n
                {
                    colHeaders.Append(dtt.Columns[i].Caption.ToString().Replace("\n", " ").Replace("\r", " ").Replace("\n", " ").Replace("\r", " ") + "\n");
                }
                else
                {
                    colHeaders.Append(dtt.Columns[i].Caption.ToString().Replace("\n", " ").Replace("\r", " ").Replace("\n", " ").Replace("\r", " ") + "\t");
                }            }
            resp.Write(colHeaders.ToString().Replace("\r", " "));
            //向HTTP输出流中写入取得的数据信息             //逐行处理数据   
            foreach (DataRow row in myRow)
            {
                //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据     
                for (i = 0; i < cl; i++)
                {
                    if (i == (cl - 1))//最后一列，加n
                    {
                        ls_item.Append(row[i].ToString().Replace("\n", " ").Replace("\r", " ").Replace("\n", " ").Replace("\r", " ") + "\n");
                    }
                    else
                    {
                        ls_item.Append(row[i].ToString().Replace("\n", " ").Replace("\r", " ").Replace("\n", " ").Replace("\r", " ") + "\t");
                    }                }
                resp.Write(ls_item.ToString().Replace("\r", " "));
                ls_item.Remove(0, ls_item.Length);            }
            resp.End();
        }