C#获取远程图片，需要Form用户名和密码的Authorization认证
复制代码 代码如下:
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Web.App_Code
{
public partial class GetFlexImage : System.Web.UI.Page
{
public static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

protected void Page_Load(object sender, EventArgs e)
{
if(Request["IMG"]==null||string.IsNullOrEmpty(Request["IMG"]))
{
return;
}
try
{
string url = (Request["IMG"]).Replace("%","%25");
HttpWebRequest WRequest;
HttpWebResponse response = null;
Uri uri = new Uri(url);
CredentialCache cc = new CredentialCache();
cc.Add(uri, "Basic", new NetworkCredential("epapi", "密码"));
WRequest = (HttpWebRequest)HttpWebRequest.Create(uri);
WRequest.Credentials = cc;
WRequest.PreAuthenticate = true;
WRequest.Method = "POST";
WRequest.AllowWriteStreamBuffering = false;
WRequest.SendChunked = false;
WRequest.KeepAlive = true;
WRequest.ContentLength = 0;

//WRequest.SendChunked = true;
//WRequest.ContentLength = 100000;
WRequest.Timeout = 30000;
WRequest.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes("epapi:epapiadmin")));
try
{
response = (HttpWebResponse)WRequest.GetResponse();
}
catch (WebException er)
{
response = (HttpWebResponse)er.Response;
}
Bitmap myImage = new Bitmap(response.GetResponseStream());
MemoryStream ms = new MemoryStream();
myImage.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType = "image/gif";
log.Debug("图片加载：" + (Request["IMG"]));
Response.BinaryWrite(ms.ToArray());
}
catch(Exception err) {
log.Debug("图片加载异常：" + Server.HtmlDecode(Request["IMG"]) + err.Message);
}
}
}
}