关于下载功能实现，请人指导一下？
我在VS2008里做了基于WEB的程序，要用到下载功能，我已经上传上去了。下载用的是LinkButton控件里的属性，NavigateURL,但是下载出错，请问应该正确的下载应该怎么样实现？ --------------------编程问答-------------------- 请人指导。。。 --------------------编程问答-------------------- (1)不知道你怎么实现的(2)不知道你怎么出错的
只能给你个参考：
http://www.google.com.hk/search?hl=zh-CN&source=hp&biw=1188&bih=585&q=asp.net%E5%AE%9E%E7%8E%B0%E4%B8%8B%E8%BD%BD%E5%8A%9F%E8%83%BD&oq=asp.net+%E5%AE%9E%E7%8E%B0%E4%B8%8B%E8%BD%BD&aq=0g&aqi=g-g2&aql=&gs_sm=e&gs_upl=453l5344l0l15l13l0l0l0l0l469l1531l2.3.2.0.1 --------------------编程问答--------------------
#region 文件下载--------------------编程问答-------------------- 我还要调用你这个函数？感觉比较复杂了。 --------------------编程问答-------------------- 请楼上给个调用方式? --------------------编程问答--------------------
public bool DownLoadFile(string localPath, string hostURL, int byteCount, string userID, long cruuent)
{
bool result = true;
string tmpURL = hostURL;
byteCount = byteCount * 1024;
hostURL = tmpURL + "&npos=" + cruuent.ToString();
System.IO.FileStream fs;
fs = new FileStream(localPath, FileMode.OpenOrCreate);
if (cruuent > 0)
{
//偏移指针
fs.Seek(cruuent, System.IO.SeekOrigin.Current);
}
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(hostURL);
if (cruuent > 0)
{
request.AddRange(Convert.ToInt32(cruuent)); //设置Range值
}
try
{
//向服务器请求，获得服务器回应数据流
System.IO.Stream ns = request.GetResponse().GetResponseStream();
byte[] nbytes = new byte[byteCount];
int nReadSize = 0;
nReadSize = ns.Read(nbytes, 0, byteCount);
while (nReadSize > 0)
{
fs.Write(nbytes, 0, nReadSize);
nReadSize = ns.Read(nbytes, 0, byteCount);
}
fs.Close();
ns.Close();
}
catch(Exception ex)
{
LOG.Error("下载" + localPath + "的时候失败！" + "原因是:" + ex.Message);
fs.Close();
result = false;
}
return result;
}
#endregion
private void DownLoadFile(string fileName)--------------------编程问答--------------------
{
string filePath = Server.MapPath("File")+"\\"+fileName;
if (File.Exists(filePath))
{
FileInfo file = new FileInfo(filePath);
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); //解决中文乱码
Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name)); //解决中文文件名乱码
Response.AddHeader("Content-length", file.Length.ToString());
Response.ContentType = "appliction/octet-stream";
Response.WriteFile(file.FullName);
Response.End();
}
}
--------------------编程问答-------------------- /// <summary>
String aPath = "C:\\boot.ini";
if (File.Exists(aPath) == true) {
this.Response.ContentType = Registry.GetValue("HKEY_CLASSES_ROOT\\" + aPath.Substring(aPath.LastIndexOf(".")).ToLower(), "Content Type", "application/octet-stream").ToString();
Byte[] aBytes = new Byte[0];
using (FileStream aStream = File.Open(aPath, FileMode.Open)) {
Array.Resize(ref aBytes, (Int32)(aStream.Length));
aStream.Read(aBytes, 0, (Int32)(aStream.Length));
this.Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(aPath.Substring(aPath.LastIndexOf("\\") + 1)));
this.Response.AddHeader("Content-length", aStream.Length.ToString());
}
this.Response.Clear();
this.Response.BinaryWrite(aBytes);
this.Response.End();
}
/// 下载文件
/// </summary>
/// <param name="fileName"></param>
/// <param name="fileContext"></param>
private void FileDownload(string fileName,byte[] fileContext)
{
using (Stream s = new MemoryStream(fileContext))
{
Response.Clear();
Response.ClearHeaders();
Response.Buffer = false;
Response.ContentType = "application/octet-stream";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
Response.AppendHeader("Content-Length", fileContext.Length.ToString());
Response.BinaryWrite(fileContext); //二进制文件
Response.Flush();
Response.End();
}
}
} --------------------编程问答-------------------- 怎么调用你写的函数，给个调用的方式？
补充：.NET技术 , C#
