客户端
/// <summary>
/// 服务器端地址，部署时为Web端的地址，可以用配置文件实现
/// </summary>
public static string serverPath;
/// <summary>
/// 上传文件（按照文件名称上传，支持断点）
/// </summary>
/// <param name="fileName">待上传文件全路径</param>
/// <param name="byteCount">上传时的流量控制，文件较大时，用于切割文件上传</param>
/// <param name="msg">错误信息</param>
/// <returns>成功或者失败</returns>
public static bool UpLoadFile(string fileName, int byteCount,out string msg)
{
msg = "";
bool result = true;
long cruuent = GetServerFileLength(fileName);
FileStream fStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
BinaryReader bReader = new BinaryReader(fStream);
long length = fStream.Length;
fileName = fileName.Substring(fileName.LastIndexOf('\\') + 1);
#region 开始上传文件
try
{
#region 续传处理
byte[] data;
if (cruuent > 0)
{
fStream.Seek(cruuent, SeekOrigin.Current);
}
#endregion
#region 分割文件上传
for (; cruuent <= length; cruuent = cruuent + byteCount)
{
if (cruuent + byteCount > length)
{
data = new byte[Convert.ToInt64((length - cruuent))];
bReader.Read(data, 0, Convert.ToInt32((length - cruuent)));
}
else
{
data = new byte[byteCount];
bReader.Read(data, 0, byteCount);
}
try
{
Hashtable parms = new Hashtable();
parms.Add("fileName", fileName);
parms.Add("npos", cruuent.ToString());
parms.Add("method", "SaveUpLoadFile");
byte[] byRemoteInfo = PostData(serverPath, data, parms);
}
catch (Exception ex)
{
msg = ex.ToString();
result = false;
break;
}
#endregion
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
bReader.Close();
fStream.Close();
}
GC.Collect();
#endregion
return result;
}
/// <summary>
/// 调用服务器端方法，或者服务器端，同名称的文件，已经上传的大小
/// </summary>
/// <param name="fileName">待上传文件全路径</param>
/// <returns>服务器端文件的大小，如果以前没有上传过，则返回0</returns>
private static long GetServerFileLength(string fileName)
{
fileName = fileName.Substring(fileName.LastIndexOf('\\') + 1);
Hashtable parms = new Hashtable();
parms.Add("fileName", fileName);
parms.Add("method", "GetServerFileLength");
long length = 0;
byte[] data = new byte[0];
byte[] byRemoteInfo = PostData(serverPath, data, parms);
string sRemoteInfo = System.Text.Encoding.Default.GetString(byRemoteInfo);
length = Convert.ToInt64(sRemoteInfo);
return length;
}
/// <summary>
/// 向服务器端提交数据
/// </summary>
/// <param name="serverURL">服务器端地址</param>
/// <param name="data">要发送的数据</param>
/// <param name="parms">附加参数，用URL的方式将此参数附件到地址中</param>
/// <returns>服务器端返回的 byte[]</returns>
private static byte[] PostData(string serverURL, byte[] data, Hashtable parms)
{
System.Net.WebClient webClientObj = new System.Net.WebClient();
if (parms != null)
{
serverURL = serverURL + "?";
foreach (string key in parms.Keys)
{
serverURL = serverURL + key + "=" + parms[key].ToString() + "&";
}
serverURL.TrimEnd('&');
}
byte[] byRemoteInfo = webClientObj.UploadData(serverURL, "POST", data);
return byRemoteInfo;
}
接收端
/// <summary>
/// 保存文件（从URL参数中获取文件名、当前指针，将文件流保存到当前指针后）
/// 如果是第一次上传，则当前指针为0，代码执行与续传一样，只不过指针没有偏移
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="npos">当前指针偏移</param>
/// <returns></returns>
public int SaveUpLoadFile(string fileName, long npos)
{
int upLoadLength = Convert.ToInt32(HttpContext.Current.Request.InputStream.Length);
string file = HttpContext.Current.Server.MapPath("/" + fileName);
//string path = HttpContext.Current.Server.MapPath("/");
//fileName = path + "UpLoad\\" + fileName;
FileStream fStream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.ReadWrite);
//偏移指针
fStream.Seek(npos, SeekOrigin.Begin);
//从客户端的请求中获取文件流
BinaryReader bReader = new BinaryReader(HttpContext.Current.Request.InputStream);
try
{
byte[] data = new byte[upLoadLength];
bReader.Read(data, 0, upLoadLength);
fStream.Write(data, 0, upLoadLength);
return 1;
}
catch
{
//TODO 添加异常处理
}
finally
{
//释放流
fStream.Close();
bReader.Close();
}
return -1;
}
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37
206KB
2015-11-24
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