ASP.NET DataSet数据生成Excel文档导出下载

public partial class am_ElectronicInvoinceExportExcel : BasePage
{
protected void Page_Load(object sender, EventArgs e)
{
ExcelFile excelFile = new ExcelFile();
excelFile.Worksheets.Add("发票信息表");
ExcelWorksheet xlsheet = excelFile.Worksheets[0];
if (excelFile == null || xlsheet == null)
{
base.SetException("无法创建Excel对象，可能您的计算机未安装Excel。请先安装Excel");
return;
}

DataSet ds = new DataSet();
ds.Merge((DataSet)Session[WebConst.DOWNLOADDATA]);
//Session[WebConst.DOWNLOADDATA] = null;
if (OperateUI.HaveData(ds))
{
#region 列名
int rowIndex = 0;
xlsheet.Rows[rowIndex].Height = 400;
xlsheet.Rows[rowIndex].Style.Font.Name = "宋体";
xlsheet.Rows[rowIndex].Style.Font.Size = 9 * 20;
xlsheet.Rows[rowIndex].Style.VerticalAlignment = VerticalAlignmentStyle.Center;
xlsheet.Rows[rowIndex].Style.HorizontalAlignment = HorizontalAlignmentStyle.Center;

CellRange cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 0, rowIndex, 0);
cellRange.Merged = true;
cellRange.Value = "发票代码";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 1, rowIndex, 1);
cellRange.Merged = true;
cellRange.Value = "发票号码";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 2, rowIndex, 2);
cellRange.Merged = true;
cellRange.Value = "提单号";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 3, rowIndex, 3);
cellRange.Merged = true;
cellRange.Value = "进出口";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 4, rowIndex, 4);
cellRange.Merged = true;
cellRange.Value = "币别";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 5, rowIndex, 5);
cellRange.Merged = true;
cellRange.Value = "金额";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 6, rowIndex, 6);
cellRange.Merged = true;
cellRange.Value = "人民币金额";

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 7, rowIndex, 7);
cellRange.Merged = true;
cellRange.Value = "开票日期";
#endregion

#region 明细数据
foreach (DataRow dr in ds.Tables[0].Rows)
{
rowIndex++;
xlsheet.Rows[rowIndex].Height = 400;
xlsheet.Rows[rowIndex].Style.Font.Name = "宋体";
xlsheet.Rows[rowIndex].Style.Font.Size = 9 * 20;
xlsheet.Rows[rowIndex].Style.VerticalAlignment = VerticalAlignmentStyle.Center;
xlsheet.Rows[rowIndex].Style.HorizontalAlignment = HorizontalAlignmentStyle.Center;

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 0, rowIndex, 0);
cellRange.Merged = true;
cellRange.Value = dr["ARIVCD"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 1, rowIndex, 1);
cellRange.Merged = true;
cellRange.Value = dr["ARIVNO"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 2, rowIndex, 2);
cellRange.Merged = true;
cellRange.Value = dr["INBLNO"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 3, rowIndex, 3);
cellRange.Merged = true;
cellRange.Value = dr["IHIE"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 4, rowIndex, 4);
cellRange.Merged = true;
cellRange.Value = dr["INCURR"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 5, rowIndex, 5);
cellRange.Merged = true;
cellRange.Value = dr["INAMT"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 6, rowIndex, 6);
cellRange.Merged = true;
cellRange.Value = dr["INCNY"].ToString().Trim();

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 7, rowIndex, 7);
cellRange.Merged = true;
cellRange.Value = dr["INDATE"].ToString().Trim();
}
#endregion

#region 总额统计
rowIndex++;
xlsheet.Rows[rowIndex].Height = 400;
xlsheet.Rows[rowIndex].Style.Font.Name = "宋体";
xlsheet.Rows[rowIndex].Style.Font.Size = 9 * 20;
xlsheet.Rows[rowIndex].Style.VerticalAlignment = VerticalAlignmentStyle.Center;
xlsheet.Rows[rowIndex].Style.HorizontalAlignment = HorizontalAlignmentStyle.Center;

decimal ipamt = 0;
decimal ipcny = 0;
try
{
ipamt = Decimal.Parse(ds.Tables[0].Compute("SUM(INAMT)", "").ToString());
}
catch { }
try
{
ipcny = Decimal.Parse(ds.Tables[0].Compute("SUM(INCNY)", "").ToString());
}
catch { }

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 5, rowIndex, 5);
cellRange.Merged = true;
cellRange.Value = string.Format("{0:N2}", ipamt);

cellRange = xlsheet.Cells.GetSubrangeAbsolute(rowIndex, 6, rowIndex, 6);
cellRange.Merged = true;
cellRange.Value = string.Format("{0:N2}", ipcny);
#endregion

#region 文件导出
string strFileName = Path.Combine(Request.MapPath(".") + "\\report\\", DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".xls");
excelFile.SaveXls(strFileName);

Response.ClearContent();
Response.ClearHeaders();
Response.BufferOutput = true;
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", "attachment; filename=" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".xls");
Response.WriteFile(strFileName);
Response.Flush();

try
{
System.IO.File.Delete(strFileName);
}
catch { }
#endregion
}
else
{
base.SetException("浏览器缓存数据出现异常，请重启浏览器后重新操作");
return;
}
}
}