下载

public void ExportExcel(DataTable dt)
{
if (dt.Rows.Count > 0)
{
//创建工作簿
NPOI.SS.UserModel.IWorkbook workbook = new NPOI.HSSF.UserModel.HSSFWorkbook();
//创建表
ISheet sheet = workbook.CreateSheet("vinkong");//表名
IRow row0 = sheet.CreateRow(0);
row0.CreateCell(0).SetCellValue("表名");
row0.CreateCell(1).SetCellValue("字段");
row0.CreateCell(2).SetCellValue("类型");
row0.CreateCell(3).SetCellValue("说明");
for (int r = 0; r < dt.Rows.Count; r++)
{
//创建行接受DataTable的行数据
IRow row = sheet.CreateRow(r + 1);
row.CreateCell(0).SetCellValue(dt.Rows[r]["TableName"].ToString());
row.CreateCell(1).SetCellValue(dt.Rows[r]["Field"].ToString());
row.CreateCell(2).SetCellValue(dt.Rows[r]["Type"].ToString());
row.CreateCell(3).SetCellValue(dt.Rows[r]["Description"].ToString());
}
string filePath = Server.MapPath("~/uploads/" + $"导出数据库表结构_{Guid.NewGuid()}.xls");

//写文件
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close();

//下载
FileInfo fileInfo = new FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileInfo.Name);
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
//删除文件
System.IO.File.Delete(filePath);

Response.End();
}
else
{
Response.Write("<script>alert('导出失败！')</script>");
}
}