一般处理程序 —— 上传文件
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <br /><br /> <form action="上传文件.ashx" method="post" enctype="multipart/form-data"> <input type="file" name="file1" /> <input type="submit" value="上传JPG文件" /> </form> <br /><br /> <form action="上传Excel文件.ashx" method="post" enctype="multipart/form-data"> <input type="file" name="file1" /> <input type="submit" value="上传Excel文件" /> </form> </body> </html>
上传图片，创建文件夹
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web;
namespace _2_一般处理程序
{
/// <summary>
/// 上传文件 的摘要说明
/// </summary>
public class 上传文件 : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/html";
HttpPostedFile file1 = context.Request.Files["file1"];
context.Response.Write("<html><head><title>上传文件</title></head><body>");
//是否上传文件
if (file1.ContentLength <= 0)
{
context.Response.Write("请选择要上传的文件");
OutputHtmlEnd(context.Response);
return;
}
//上传文件大小检测
if (file1.ContentLength > 1024 * 1024)
{
context.Response.Write("上传文件大小不能超过1M");
OutputHtmlEnd(context.Response);
return;
}
//上传文件后缀名检测
string filename = file1.FileName;
string suffix = Path.GetExtension(filename);
if (suffix != ".jpg" & suffix != ".jpeg")
{
context.Response.Write("只允许上传jpg文件");
OutputHtmlEnd(context.Response);
return;
}
#region 保存文件
//重命名：DateTime
//Random ro = new Random();
//filename = string.Format("{0}{1}{2}", DateTime.Now.ToString("yyyyMMddHHmmssff"), ro.Next(1000, 9999), suffix);
//重命名：GUID（全球唯一标识符）推荐！！！
filename = string.Format("{0}{1}", Guid.NewGuid().ToString("N"), suffix);
//创建目录
string dirPath = DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day;
string dirFullPath = context.Server.MapPath("~/upload/" + dirPath);
string fileFullPath = Path.Combine(dirFullPath, filename);
//如果文件夹不存在，则先创建文件夹
if (!Directory.Exists(dirFullPath))
{
Directory.CreateDirectory(dirFullPath);
}
//string filePath = context.Server.MapPath("~/upload") + "/" + filename;
//保存文件
file1.SaveAs(fileFullPath);
context.Response.Write("上传成功：" + fileFullPath);
OutputHtmlEnd(context.Response);
#endregion
#region 加水印
//using (Image img = Bitmap.FromStream(file1.InputStream))
//{
// using (Graphics g = Graphics.FromImage(img))//得到图片的画布
// using (Font font = new Font(FontFamily.GenericSerif, 18))
// {
// g.DrawString("logo", font, Brushes.Red, 30, 0);
// }
// string fileName = DateTime.Now.ToString("yyyyMMdd");
// string filePath = context.Server.MapPath("~/upload") + "/" + fileName + extension;
// img.Save(filePath);
// context.Response.Write("上传成功：" + filePath);
//}
#endregion
}
private void OutputHtmlEnd(HttpResponse response)
{
response.Write("</body></html>");
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
上传Excel，读取Excel中的内容
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
namespace _2_一般处理程序
{
/// <summary>
/// 上传Excel文件 的摘要说明
/// </summary>
public class 上传Excel文件 : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/html";
HttpPostedFile file1 = context.Request.Files["file1"];
context.Response.Write("<html><head><title>Excel云</title></head><body>");
//是否上传文件
if (file1.ContentLength<=0)
{
context.Response.Write("请选择要上传的文件");
OutputHtmlEnd(context.Response);
return;
}
//上传文件大小检测
if (file1.ContentLength > 1024 * 1024)
{
context.Response.Write("上传文件大小不能超过1M");
OutputHtmlEnd(context.Response);
return;
}
//上传文件后缀名检测
string extension = Path.GetExtension(file1.FileName);
if (extension != ".xls" & extension != ".xlsx")
{
context.Response.Write("只允许上传xls或xlsx文件");
OutputHtmlEnd(context.Response);
return;
}
using (Stream fs = file1.InputStream)
{
//自动识别Excel 2003或2007格式
IWorkbook workbook = WorkbookFactory.Create(fs);
//遍历所有表
for (int i = 0; i < workbook.NumberOfSheets; i++)
{
ISheet sheet = workbook.GetSheetAt(i);
OutputSheet(context.Response, sheet);
}
}
}
private void OutputSheet(HttpResponse response, ISheet sheet)
{
response.Write("<h1>" + sheet.SheetName + "</h1>");
response.Write("<table border='1'>");
if (sheet.LastRowNum > 0)
{
//遍历所有行
for (int j = sheet.FirstRowNum; j <= sheet.LastRowNum; j++)
{
IRow row = sheet.GetRow(j);
if (row == null) continue;
response.Write("<tr>");
//遍历所有单元格
for (int k = row.FirstCellNum; k <= row.LastCellNum; k++)
{
ICell cell = row.GetCell(k);
string cellValue = (cell == null ? "" : cell.ToString());
response.Write("<td>" + cellValue + "</td>");
}
response.Write("</tr>");
}
}
response.Write("</table>");
OutputHtmlEnd(response);
}
private void OutputHtmlEnd(HttpResponse response)
{
response.Write("</body></html>");
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
