namespace FLX.ComplexQuery
{
    public partial class OutPutExcel : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            DataGrid1.DataSource = CreateDataSource();
            DataGrid1.DataBind();
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "GB2312";
            Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//設置輸出流為簡體中文
            Response.ContentType = "application/ms-excel";//設置輸出文件類型為excel文件。
            this.EnableViewState = false;
            System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            this.DataGrid1.RenderControl(oHtmlTextWriter);
            Response.Write(oStringWriter.ToString());
            Response.End();
        }

        ICollection CreateDataSource()
        {

            DataTable dt = new DataTable();
            DataRow dr;
            dt.Columns.Add(new DataColumn("身份證號碼", typeof(string)));
            dt.Columns.Add(new DataColumn("圖書單價", typeof(decimal)));
            dt.Columns.Add(new DataColumn("購買數量", typeof(Int32)));
            dt.Columns.Add(new DataColumn("總價格", typeof(decimal)));
            for (int i = 0; i 〈 30; i++)
            {
                dr = dt.NewRow();

                dr[0] = "123456789123456789";
                dr[1] = 100 * i / 3.0;
                dr[2] = i + 5;
                dr[3] = (decimal)dr[1] * (Int32)dr[2];
                dt.Rows.Add(dr);
            }
            DataView dv = new DataView(dt);
            return dv;
        }

        protected void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                //將整個datagrid都格式化為文本格式
                int datagridcolumns; //datagrid顯示列的數量,
                //獲取顯示列的數量可以從數據源那里進行獲取
                //比如綁定DataGrid的數據源是DataSet                  
                //datagrid顯示列的數量 = ds.tables[0].Columns.Count; 
                for (int i = 0; i 〈 datagridcolumns; i++)
                {
                    e.Item.Cells[i].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
                }

                //對需要格式化的列進行格式化
                //e.Item.Cells[0].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
                //e.Item.Cells[2].Attributes.Add("style", "vnd.ms-excel.numberformat::#,##0.00");
               // e.Item.Cells[3].Attributes.Add("style", "vnd.ms-excel.numberformat:￥#,###.00");         
            }
        }
    }
}