using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.DDF;
using NPOI.SS.UserModel;
using System.IO;
using NPOI.SS;
#region 导出
protected void btnexcel_Click(object sender, EventArgs e)
{
QQT_BLL.gg_content bll = new QQT_BLL.gg_content();
DataSet ds = bll.getds("");
DataTable dt = ds.Tables[0];
string excelname = System.DateTime.Now.ToString().Replace(":", "").Replace("-", "").Replace(" ", "");
string filePath = System.Web.HttpContext.Current.Server.MapPath("ReadExcel") + "\\" + excelname + ".xls";
MemoryStream ms = RenderDataTableToExcel(dt) as MemoryStream;
FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write);
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
fs.Close();
data = null;
ms = null;
fs = null;
#region 导出到客户端
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.AppendHeader("content-disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(excelname, System.Text.Encoding.UTF8) + ".xls");
Response.ContentType = "Application/excel";
Response.WriteFile(filePath);
Response.End();
#endregion
}
public Stream RenderDataTableToExcel(DataTable SourceTable)
{
MemoryStream ms = new MemoryStream();
NPOI.HSSF.UserModel.HSSFWorkbook workbook = new NPOI.HSSF.UserModel.HSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = workbook.CreateSheet();
NPOI.SS.UserModel.IRow headerRow = sheet.CreateRow(0);
//设置7列宽为100
sheet.SetColumnWidth(7, 100);
//加标题
headerRow.CreateCell(0).SetCellValue("广告编号");
headerRow.CreateCell(1).SetCellValue("广告标题");
headerRow.CreateCell(2).SetCellValue("广告内容");
headerRow.CreateCell(3).SetCellValue("所属广告商");
headerRow.CreateCell(4).SetCellValue("广告电话");
headerRow.CreateCell(5).SetCellValue("广告网址");
headerRow.CreateCell(6).SetCellValue("广告小图片");
headerRow.CreateCell(7).SetCellValue("图片显示");
headerRow.CreateCell(8).SetCellValue("广告大图片");
headerRow.CreateCell(9).SetCellValue("图片显示");
headerRow.CreateCell(10).SetCellValue("审核状态");
int rowIndex = 1;
foreach (DataRow row in SourceTable.Rows)
{
NPOI.SS.UserModel.IRow dataRow = sheet.CreateRow(rowIndex);
dataRow.Height = 50;
//列高50
dataRow.CreateCell(0).SetCellValue(row["gg_id"].ToString());
dataRow.CreateCell(1).SetCellValue(row["gg_title"].ToString());
dataRow.CreateCell(2).SetCellValue(row["gg_memo"].ToString());
dataRow.CreateCell(3).SetCellValue(row["ggs_name"].ToString());
dataRow.CreateCell(4).SetCellValue(row["gg_tel"].ToString());
dataRow.CreateCell(5).SetCellValue(row["gg_add"].ToString());
dataRow.CreateCell(6).SetCellValue(row["p_name"].ToString());
string picurl = row["p_url"].ToString(); //图片存储路径
dataRow.CreateCell(8).SetCellValue(row["gg_check"].ToString());
AddPieChart(sheet, workbook, picurl,rowIndex ,7);
rowIndex++;
}
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
sheet = null;
headerRow = null;
workbook = null;
return ms;
}
///
/// 向sheet插入图片
///
///
///
private void AddPieChart(ISheet sheet, HSSFWorkbook workbook, string fileurl,int row,int col)
{
try
{
//add picture data to this workbook.
string path = Server.MapPath("~/html/");
if (fileurl.Contains("/"))
{
path += fileurl.Substring( fileurl.IndexOf (‘/‘));
}
string FileName = path;
byte[] bytes = System.IO.File.ReadAllBytes(FileName);
if (!string.IsNullOrEmpty(FileName))
{
int pictureIdx = workbook.AddPicture(bytes,NPOI .SS .UserModel .PictureType.JPEG);
HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 100, 50, col , row , col +1, row +1);
//##处理照片位置，【图片左上角为（col, row）第row+1行col+1列，右下角为（ col +1, row +1）第 col +1+1行row +1+1列，宽为100，高为50
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
// pict.Resize();这句话一定不要，这是用图片原始大小来显示
}
}
catch (Exception ex)
{
throw ex;
}
}
#endregion