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ASP.NET使aspx页面能接受HTML，asp的页面传送的文件

王朝asp·作者佚名 2006-01-10

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aspx接受aspx页面的文件很简单，用HtmlInputFile,就可以了，但是如果接受Html页面post的文件

就不怎么好办了，我仿照asp的方法做法如下，自己测试通过，拿出来给大家共享，可以限制

文件内容，类型，大小，自定义存储位置，在congfig.xml内

html页的内容：（来自FCKeditor）

<html>

<head>

<title>FCKeditor - Uploaders Tests</title>

function SendFile()

{

var sUploaderUrl = cmbUploaderUrl.value ;

if ( sUploaderUrl.length == 0 )

sUploaderUrl = txtCustomUrl.value ;

if ( sUploaderUrl.length == 0 )

{

alert( 'Please provide your custom URL or select a default one' ) ;

return ;

}

eURL.innerHTML = sUploaderUrl ;

txtUrl.value = '' ;

frmUpload.action = sUploaderUrl ;

frmUpload.submit() ;

}

function OnUploadCompleted( errorNumber, fileUrl, fileName, customMsg )

{

switch ( errorNumber )

{

case 0 : // No errors

txtUrl.value = fileUrl ;

alert( 'File uploaded with no errors' ) ;

break ;

case 1 : // Custom error

alert( customMsg ) ;

break ;

case 10 : // Custom warning

txtUrl.value = fileUrl ;

alert( customMsg ) ;

break ;

case 201 :

txtUrl.value = fileUrl ;

alert( 'A file with the same name is already available. The uploaded file has been renamed to "' + fileName + '"' ) ;

break ;

case 202 :

alert( 'Invalid file' ) ;

break ;

case 203 :

alert( "Security error. You probably don't have enough permissions to upload. Please check your server." ) ;

break ;

default :

alert( 'Error on file upload. Error number: ' + errorNumber ) ;

break ;

}

</script>

</head>

<body>

<tr>

<td>

<tr>

Select the "File Uploader" to use:<br>

</select>

</td>

Custom Uploader URL:<BR>

</td>

</tr>

</table>

<br>

<tr>

Upload a new file:<br>

</form>

</td>

Uploaded File URL:<br>

</td>

</tr>

</table>

<br>

Post URL: <span id="eURL"> </span>

</td>

</tr>

<tr>

</td>

</tr>

</table>

</body>

</html>

upload.aspx的内容：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Upload.aspx.cs" Inherits="Upload"%>

下面是后台代码：

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.IO;

using System.Text;

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;

using System.Xml;

using System.Collections.Specialized;

public partial class Upload : System.Web.UI.Page

{

public void SendResults(int errorNumber, string fileUrl, string fileName, string customMsg)

{

StringBuilder text = new StringBuilder();

text.Append("<script type=\"text/javascript\">");

text.Append("window.parent.OnUploadCompleted(" + errorNumber + ",\"" + fileUrl.Replace("\"", "\\\"") + "\",\"" + fileName.Replace("\"", "\\\"") + "\",\"" + customMsg.Replace("\"", "\\\"") + "\") ;\n");

text.Append(" </script>");

Response.Write(text.ToString());

Response.End();

}

public void GetConfig(string type, out string[] allowedExt, out string[] denyedExt,out string savePath,out long maxSize)

{

XmlDocument doc = new XmlDocument();

doc.Load(Server.MapPath(@".\Config.xml"));

XmlElement root=doc.DocumentElement;

XmlNodeList imageNodelist=root.GetElementsByTagName(type);

allowedExt = imageNodelist[0].FirstChild.InnerText.Trim().Split('|');

denyedExt = imageNodelist[0].LastChild.InnerText.Trim().Split('|');

savePath = root.GetElementsByTagName("userPath").Item(0).InnerText.Trim();

try

{

maxSize = Convert.ToInt64(root.GetElementsByTagName("maxSize").Item(0).InnerText.Trim());

}

catch { maxSize = 10*1024; }

}

protected void Page_Load(object sender, EventArgs e)

{

string[] allowedExt = new string[] { }, denyedExt = new string[] { };

string savePath = String.Empty;

long maxSize = 10000;

string type = Request.QueryString["Type"];

if(type!=null&&type!=string.Empty)

type=type.ToLower();

else

type="file";

if (type == "image")

{

GetConfig("image", out allowedExt, out denyedExt, out savePath,out maxSize);

}

if (type == "file")

{

GetConfig("file", out allowedExt, out denyedExt, out savePath, out maxSize);

}

if (type == "flash")

{

GetConfig("flash", out allowedExt, out denyedExt, out savePath, out maxSize);

}

if (savePath == string.Empty||savePath=="")

savePath = "~/UserFiles/";

if(!savePath.EndsWith("/"))savePath+="/";

/*********************************************************************************

byte[] bytes1 = System.Text.Encoding.Default.GetBytes("这是字符串\n\n\n\n");

byte[] bytes2 = new byte[] { 1, 33, 23, 3, 0, 56, 55, 235, 5 };//二进制数

byte[] bytes = new byte[bytes1.Length + bytes2.Length];

//合并二进制流

MemoryStream ms = new MemoryStream(bytes);

ms.Write(bytes1, 0, bytes1.Length);

ms.Write(bytes2, 0, bytes2.Length);

int count = 0, pos = 0;

//开始找四个'\n'

for (int i = 0; i < bytes.Length; i++)

{

if (bytes[i] == (int)'\n')

{

count++;

if (count == 4)

{

pos -= 4;

break;

}

if (count == 4)

{

//这里，bytes字节数组里从0 到 pos 的位置就是你要的字符串

//从pos + 5 开始到最后，就是你要的二进制

}

**********************************************************************************/

byte[] fileData, formData;

formData = Request.BinaryRead(Request.ContentLength);

string head = String.Empty;

Encoding encoding = Encoding.UTF8;

long pos = 0;

for (long i = 0; i < formData.LongLength; i++)

{

if (formData[i] == (byte)'\r' && formData[i + 1] == (byte)'\n' && formData[i + 2] == (byte)'\r' && formData[i + 3] == (byte)'\n')

{

pos = i;

break;

}

if (pos == 0) { Response.End(); return; }

head = encoding.GetString(formData, 0, (int)pos);

fileData = new byte[formData.LongLength - pos - 3];

Array.Copy(formData, pos + 4, fileData, 0, formData.LongLength - pos - 4);

/************************************************************************************************

//传来的表单形式是：

//"-----------------------------7d5fa3820f84\r\nContent-Disposition: form-data; name=\"NewFile\"; filename=\"F:\\Documents\\4(10995).jpg\"\r\nContent-Type: image/pjpeg\r\n\r\n

//后面是文件数据

************************************************************************************************/

head = head.ToLower();

head = head.Remove(0, head.IndexOf("\r\n") + 2);

head = head.Replace("\"", "");

string postFileName = string.Empty;

string fileName;//no path

string fileType, fileExt;

postFileName = head.Substring(0, head.IndexOf("\r\n"));//Content-Disposition: form-data; name=\"NewFile\"; filename=\"F:\\Documents\\4(10995).jpg\"

fileType = head.Remove(0, postFileName.Length + 3);//returns:Content-Type: image/pjpeg

postFileName = postFileName.Substring(postFileName.IndexOf("filename=") + "filename=".Length);//C:\path\name

fileName = Path.GetFileName(postFileName);