1.html页面 注意：form的enctype="multipart/form-data"
<form method="post" action="FileUp.ashx" enctype="multipart/form-data" >
<input type="file" name="fileUp" />
<input type="submit" value="上传"/>
</form>
2.一般处理程序后台处理
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/html";
string[] fileExtList = new string[] { ".jpg", ".png", ".img" };
HttpPostedFile file = context.Request.Files[0];
if (file.ContentLength>0)
{
//类型校验
string fileName = Path.GetFileName(file.FileName);
string fileExt = Path.GetExtension(fileName);
if (fileExtList.Contains(fileExt))
{
//对上传文件重命名
fileName = Guid.NewGuid().ToString() + fileExt ;
//将上传的文件放到不同的目录
string dir = "/ImageUpLoad/" + DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day + "/";
if (!Directory.Exists(context.Request.MapPath(dir)))
{
Directory.CreateDirectory(context.Request.MapPath(dir));
}
fileName = dir + fileName;
file.SaveAs(context.Request.MapPath(fileName));
//展示上传的图片
context.Response.Write("<html><body><img src=‘" + fileName + "‘></body></html>");
}
else
{
context.Response.Write("只能上传图片文件");
}
}
else
{
context.Response.Write("请选择上传文件");
}
}
时间： 2024-10-19 08:17:04