標籤：說明 ipa .text maximum tostring erro 指定 hive int
/// <summary>
/// 將本地檔案上傳到指定的伺服器(HttpWebRequest方法)
/// </summary>
/// <param name="address">檔案上傳到的伺服器</param>
/// <param name="fileNamePath">要上傳的本地檔案（全路徑）</param>
/// <param name="saveName">檔案上傳後的名稱</param>
/// <param name="progressBar">上傳進度條</param>
/// <returns>成功返回1，失敗返回0</returns>
private int Upload_Request(string address, string fileNamePath, string saveName, ProgressBar progressBar)
{
int returnValue = 0; // 要上傳的檔案
FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs); //時間戳記
string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n"); //要求標頭部資訊
StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(strBoundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append("file");
sb.Append("\"; filename=\"");
sb.Append(saveName);
sb.Append("\"");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append("application/octet-stream");
sb.Append("\r\n");
sb.Append("\r\n");
string strPostHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader); // 根據uri建立HttpWebRequest對象
HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));
httpReq.Method = "POST"; //對發送的資料不使用緩衝
httpReq.AllowWriteStreamBuffering = false; //設定獲得響應的逾時時間（300秒）
httpReq.Timeout = 300000;
httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;
long fileLength = fs.Length;
httpReq.ContentLength = length;
try
{
progressBar.Maximum = int.MaxValue;
progressBar.Minimum = 0;
progressBar.Value = 0; //每次上傳4k
int bufferLength = 4096;
byte[] buffer = new byte[bufferLength]; //已上傳的位元組數
long offset = 0; //開始上傳時間
DateTime startTime = DateTime.Now;
int size = r.Read(buffer, 0, bufferLength);
Stream postStream = httpReq.GetRequestStream(); //發送要求標頭部訊息
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
while (size > 0)
{
postStream.Write(buffer, 0, size);
offset += size;
progressBar.Value = (int)(offset * (int.MaxValue / length));
TimeSpan span = DateTime.Now - startTime;
double second = span.TotalSeconds;
lblTime.Text = "已用時：" + second.ToString("F2") + "秒";
if (second > 0.001)
{
lblSpeed.Text = " 平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";
}
else
{
lblSpeed.Text = " 正在串連…";
}
lblState.Text = "已上傳：" + (offset * 100.0 / length).ToString("F2") + "%";
lblSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M";
Application.DoEvents();
size = r.Read(buffer, 0, bufferLength);
}
//添加尾部的時間戳記
postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
postStream.Close(); //擷取伺服器端的響應
WebResponse webRespon = httpReq.GetResponse();
Stream s = webRespon.GetResponseStream();
StreamReader sr = new StreamReader(s); //讀取伺服器端返回的訊息
String sReturnString = sr.ReadLine();
s.Close();
sr.Close();
if (sReturnString == "Success")
{
returnValue = 1;
}
else if (sReturnString == "Error")
{
returnValue = 0;
} }
catch
{
returnValue = 0;
}
finally
{
fs.Close();
r.Close();
} return returnValue;
} 參數說明如下： address：接收檔案的URL地址，如：http://localhost/UploadFile/Save.aspx fileNamePath：要上傳的本地檔案，如：D:\test.rar saveName：檔案上傳到伺服器後的名稱，如：200901011234.rar progressBar：顯示檔案上傳進度的進度條。 接收檔案的WebForm添加一個Save.aspx頁面，Load方法如下： protected void Page_Load(object sender, EventArgs e)
{
if (Request.Files.Count > 0)
{
try
{
HttpPostedFile file = Request.Files[0];
string filePath = this.MapPath("UploadDocument") + "\\" + file.FileName;
file.SaveAs(filePath);
Response.Write("Success\r\n");
}
catch
{
Response.Write("Error\r\n");
}
}
} 同時需要配置WebConfig檔案的httpRuntime 如下： <httpRuntime maxRequestLength="102400" executionTimeout="300"/> 不能的話最大隻能上傳4M了。要是想上傳更大的檔案，maxRequestLength，executionTimeout設定大些，同時
WinForm下的程式碼 //設定獲得響應的逾時時間（300秒）
httpReq.Timeout = 300000;
也要修改，另外別忘了看看IIS的連線逾時是否設定為足夠大。
參考：
http://blogs.msdn.com/johan/archive/2006/11/15/are-you-getting-outofmemoryexceptions-when-uploading-large-files.aspx
[轉]C#在WinForm下使用HttpWebRequest上傳檔案並顯示進度
