非常简单的例子。ASP.NET例子。。高手百送分的题。。。(50分)

蓝叶菱 · 2006-05-26

upload.aspx
---------
<%@ Page Language="C#"
AutoEventWireup="true"
CodeFile="upload.aspx.cs"
Inherits="upload"
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
>
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1"
runat="server">
<div style="text-align: center">
<strong>UPLOAD SAMPLE<br />
<br />
<input id="File1"
style="width: 473px"
type="file"
/><br />
<br />
<input id="File2"
style="width: 471px"
type="file"
/><br />
<br />
<input id="File3"
style="width: 469px"
type="file"
/><br />
<br />
<input id="File4"
style="width: 469px"
type="file"
/><br />
<asp:LinkButton ID="LinkButton1"
runat="server">LinkButton</asp:LinkButton>

<a href="JavaScript:document.forms[0].reset()"
id="LinkButton2"
style="FONT-WEIGHT:bold;FONT-SIZE:xx-small;FONT-FAMILY:verdana">
Reset Form</A> <STRONG>::</STRONG>
<P>

<br />
<asp:Label ID="Label1"
runat="server"
Text="Label"
Width="440px"></asp:Label>
<asp:Label ID="Label2"
runat="server"
Text="Label"
Width="188px"></asp:Label>
</strong></div>
</form>
</body>
</html>
--------------
upload.asp.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class upload : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack)
this.SaveImages();
}
private System.Boolean SaveImages()
{
//loop through the files uploaded
System.Web.HttpFileCollection _files = System.Web.HttpContext.Current.Request.Files;
//Message to the user
System.Text.StringBuilder _message = new System.Text.StringBuilder("Files Uploaded:<br>&quot

;
Label2.Text =System.Convert.ToString( System.Web.HttpContext.Current.Request.Files.Count);
//为什么这里,没有得到input file的数量啊.
try
{
for (System.Int32 _iFile = 0;
_iFile < _files.Count;
_iFile++)
{
// Check to make sure the uploaded file is a jpg or gif
System.Web.HttpPostedFile _postedFile = _files[_iFile];
System.String _fileName, _fileExtension;
_fileName = System.IO.Path.GetFileName(
_postedFile.FileName);
_fileExtension = System.IO.Path.GetExtension(
_fileName);
if (_fileExtension == ".gif&quot

{
//Save File to the proper directory
_postedFile.SaveAs(
System.Web.HttpContext.Current.Request.MapPath(
"gifs/&quot

+ _fileName);
_message.Append(_fileName + "<BR>&quot

;
}
else
if (_fileExtension == ".jpg&quot

{
//Save File to the proper directory
_postedFile.SaveAs(
System.Web.HttpContext.Current.Request.MapPath(
"jpgs/&quot

+ _fileName);
_message.Append(_fileName + "<BR>&quot

;
}
else
{
_message.Append(_fileName + "
<font color=/"red/">failed!! Only .gif and .jpg images allowed!</font> <BR>&quot

;
}
}
Label1.Text = _message.ToString();
return true;
}
catch (System.Exception Ex)
{
Label1.Text = Ex.Message;
return false;
}
}
}
-------------
为什么request.Fiels取不到任何值。。。。。。。。。。。。。。。。

蓝叶菱 · 2006-05-26

帮忙啊。。。。

蓝叶菱 · 2006-05-26

各位，上面代码，怎么也无法上传图片，我查request.files.count居然是0???!!!!!!

石嶷山友 · 2006-05-26

我是用这个方法，上传一切正常。
private void upfile()
{
try
{
string filename = File1.PostedFile.FileName;
string togo = "files/"
+ filename.Remove(0, filename.LastIndexOf("//&quot

+ 1);
File1.PostedFile.SaveAs(Server.MapPath(togo));
long fileSize = File1.PostedFile.ContentLength;
string fileSizeStr;
if(fileSize > 1000000) fileSizeStr = fileSize/1000000 + "
Mb";
else
if(fileSize > 1000) fileSizeStr = fileSize/1000 + "
Kb";
else
fileSizeStr = fileSize + "
b";

string myfilename=filename.Remove(0, filename.LastIndexOf("//&quot

+ 1);
OleDbConnection Olecn=new OleDbConnection(Session["constr"].ToString());
Olecn.Open();
string sql="insert into files(filename,wjms,updatetime,filelocate) select '"+myfilename+"["+fileSizeStr +"]"
+"','"+WJMS.Text.Trim()+"',#"+DateTime.Now.ToString()+"#,'files/"+myfilename+"'";
OleDbCommand cm=new OleDbCommand(sql,Olecn);
cm.ExecuteNonQuery();
Olecn.Close();
Response.Write("<script>alert('文件上传成功!')</script>&quot

;
}
catch
{
Response.Write("<script>alert('文件上传失败,可能文件不存在或文件大于4M!')</script>&quot

;
}
}

蓝叶菱 · 2006-05-29

<input id="File1"
style="width: 473px"
type="file"
/><br />
<br />
<input id="File2"
style="width: 471px"
type="file"
/><br />
<br />
<input id="File3"
style="width: 469px"
type="file"
/><br />
<br />
<input id="File4"
style="width: 469px"
type="file"
/><br />
要求File必须使用HTML的组件，不准使用web /ASP.net的控件。。。。
控制以上的。。。

石嶷山友 · 2006-05-29

朋友你可能误会了，这里的 File1 是 HTML 组件，不是 .net 组件。

franklky · 2006-05-30

在这里发一个讨论的问题，如何实现文件的多线程断点续传！！主要是为了针对超大文件的上传来考虑的！！

蓝叶菱 · 2006-05-30

如果大文件修改IIS的配置，就可以了，就可以传输大文件，如果真的要完美传输的话，开发ASP的SERVER组件，参见书籍。

都他妈的垃圾，这个问题还得自己解答，除了楼上的给分外，需要换题目了。
<input id="File1"
style="width: 473px"
type="file"
/><br />
转换成Server组件就可以了。
<input id="File1"
style="width: 473px"
type="file"
runat="server"
/><br />

蓝叶菱 · 2006-05-30

算了，散分吧。

非常简单的例子。ASP.NET例子。。高手百送分的题。。。(50分)

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