如何获取网络图片数据？

mendel 2009-12-11 04:43:03

得到byte[]后保存在数据库的image字段中

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海涛zht666 2011-01-14

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不好意思，刚刚回复复错了
Image myImg = Image.FromStream(WebRequest.Create("网络地址，如http://...").GetResponse().GetResponseStream());

海涛zht666 2011-01-14

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public static void DownloadFileByURL(string fileName, string url, string localPath)
{
System.Net.HttpWebRequest request = null;
System.Net.HttpWebResponse response = null;
request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url + fileName);
response = (System.Net.HttpWebResponse)request.GetResponse();
Stream s = response.GetResponseStream();
BinaryReader br = new BinaryReader(s);
int l= Int32.Parse(response.ContentLength.ToString());
byte[] byteArr = new byte[l];
s.Read(byteArr, 0, l);
if (File.Exists(localPath + fileName)) { File.Delete(localPath + fileName); }
if (Directory.Exists(localPath) == false) { Directory.CreateDirectory(localPath); }
FileStream fs = File.Create(localPath + fileName);
fs.Write(byteArr, 0, length2);
fs.Close();
br.Close();
}

wuyq11 2009-12-11

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wuyq11 2009-12-11

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WebClient wc = new WebClient();
wc.DownloadFile( "http://www.a.com/logo.gif ", "c:\\a.gif ");

hhc123 2009-12-11

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Image.FromStream();这个懂吧，

mendel 2009-12-11

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[Quote=引用 2 楼 zetee 的回复:]
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://c.csdn.net/bbs/t/5/i/pic_logo.gif");
try
{
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream sm = response.GetResponseStream();
MemoryStream ms=new MemoryStream();
byte[] buffer = new byte[4096];
int len;

len = sm.Read(buffer, 0, 4096);
while (len>0)
{
ms.Write(buffer, 0, len); len=sm.Read(buffer, 0, 4096);

}

// 创建连接
SqlConnection conn=new SqlConnection(ConnectionString);
SqlCommand com=conn.CreateCommand();

com.CommandText="Update 表 Set [图片]=@F Where ID='0001'";
com.CommandType=CommandType.Text;

SqlParameter sp=new SqlParameter("@F",SqlDbType.Image,ms.GetBuffer().Length,ParameterDirection.Input,false,0,0,null,DataRowVersion.Current,ms.GetBuffer());

com.Parameters.Add(sp);
com.ExecuteNonQuery();
conn.Close();

}
catch (WebException ex)
{

if (ex.Status == WebExceptionStatus.NameResolutionFailure)
{
//域名无法解析
}
}
[/Quote]

这个是sm?

zetee 2009-12-11

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HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://c.csdn.net/bbs/t/5/i/pic_logo.gif");
try
{
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream sm = response.GetResponseStream();
MemoryStream ms=new MemoryStream();
byte[] buffer = new byte[4096];
int len;

len = sm.Read(buffer, 0, 4096);
while (len>0)
{
ms.Write(buffer, 0, len);
len=sm.Read(buffer, 0, 4096);

}

// 创建连接
SqlConnection conn=new SqlConnection(ConnectionString);
SqlCommand com=conn.CreateCommand();

com.CommandText="Update 表 Set [图片]=@F Where ID='0001'";
com.CommandType=CommandType.Text;

SqlParameter sp=new SqlParameter("@F",SqlDbType.Image,ms.GetBuffer().Length,ParameterDirection.Input,false,0,0,null,DataRowVersion.Current,ms.GetBuffer());

com.Parameters.Add(sp);
com.ExecuteNonQuery();
conn.Close();

}
catch (WebException ex)
{

if (ex.Status == WebExceptionStatus.NameResolutionFailure)
{
//域名无法解析
}
}