从wewbsite获取图像 [英] Getting image from wewbsite
问题描述
有人知道如何从加载到
webbrowser控件中的网页中提取图像，并将其保存到文件中或将其保存在数据库中吗？
干杯，
Johnny J.
" ; Johnny J？rgensen" < jo ** @ altcom.sewrote in message
news：Ot ************** @ TK2MSFTNGP02.phx.gbl ...
< blockquote class =post_quotes>
有没有人知道如何从加载到
a webbrowser控件中的网页中提取图像，并将其保存到文件中或将其保存在数据库中？
干杯，
Johnny J.
您需要像在图片中一样阅读图片在网页上阅读....首先，
打开网页并解析图片的路径...然后，您可以使用
以下代码获取图像的字节数组并存储到数据库中的文件或
数据列。
//开始C＃
string url =
@" http：//www.co.merced.ca.us/CountyWeb/images/GeneralActive.gif" ;;
HttpWebRequest request =
（HttpWebRequest）WebRequest.Create（url）;
HttpWebResponse response =
（HttpWebResponse）request.GetResponse（）;
byte [] bytes;
using（Stream stream = response.GetResponseStream（））{
bytes = new byte [response.ContentLength];
stream.Read（bytes，0，bytes.Length）;
}
//现在我们有一个字节数组要做希望，保存到文件
现在。
FileStream fs = File.Create（@C：\ GeneneralActive.gif）;
fs.Write（bytes，0，bytes.Length）;
fs.Close（）;
//或写入数据库。
//要执行此操作，请创建一个IMAGE（SQL Server）列，然后将字节数组复制到DataRow的字段中。图像列
//映射到DataRow中DataColumn中的字节数组。
//结束C＃
在更新版本的.Net
框架中可能会有更简单或更好的方式，但是...... :)
HTH，
Mythran
Johny，
一旦你知道它的网址，就可以下载它使用
DownloadFile
http://msdn2.microsoft.com/en-us/lib...le(VS.71).aspx
要在webbrowser中获取它，你需要大量的mshtml
http://support.microsoft.com/kb/311284
Cor
" Johnny J？rgensen" < jo ** @ altcom.seschrieb：
有没有人知道如何从加载到的网页中提取图像
a webbrowser control并将其保存到文件或将其保存在数据库中？
''My.Computer.Network.DownloadFile''
''System.Net.WebClient.DownloadFile''
您可以将二进制数据作为BLOB存储在数据库中。
-
MS Herfried K. Wagner
MVP< URL：http：//dotnet.mvps.org/>
VB< URL：http：//dotnet.mvps.org/dotnet/faqs/ >
Does anybody know how you can extract an image fron a webpage loaded into a
webbrowser control and either save it to file OR save it in a database?
Cheers,
Johnny J.
"Johnny J?rgensen" <jo**@altcom.sewrote in message
news:Ot**************@TK2MSFTNGP02.phx.gbl...Does anybody know how you can extract an image fron a webpage loaded into
a webbrowser control and either save it to file OR save it in a database?
Cheers,
Johnny J.
You need to read in the image as if you were reading in a webpage....first,
open the web page and parse the path to the image...then, you can use the
following code to get the byte-array of the image and store to a file or
data column in a database.
// BEGIN C#
string url =
@"http://www.co.merced.ca.us/CountyWeb/images/GeneralActive.gif";
HttpWebRequest request =
(HttpWebRequest) WebRequest.Create(url);
HttpWebResponse response =
(HttpWebResponse) request.GetResponse();
byte[] bytes;
using (Stream stream = response.GetResponseStream()) {
bytes = new byte[response.ContentLength];
stream.Read(bytes, 0, bytes.Length);
}
// Now we have a byte array to do as we wish, saving to a file
now.
FileStream fs = File.Create(@"C:\GeneralActive.gif");
fs.Write(bytes, 0, bytes.Length);
fs.Close();
// OR write to a database.
// To do this, create an IMAGE (SQL Server) column and just copy
// the byte array into the field for a DataRow. An Image column
// maps to a byte-array in a DataColumn in a DataRow.
// END C#
There may be an easier or better way in a more recent version of the .Net
Framework though... :)
HTH,
Mythran
Johny,
As soon as you know its url location you can download it using
DownloadFile
http://msdn2.microsoft.com/en-us/lib...le(VS.71).aspx
To get that in a webbrowser you mostly needs a lot of mshtml
http://support.microsoft.com/kb/311284
Cor
"Johnny J?rgensen" <jo**@altcom.seschrieb:Does anybody know how you can extract an image fron a webpage loaded into
a webbrowser control and either save it to file OR save it in a database?''My.Computer.Network.DownloadFile''
''System.Net.WebClient.DownloadFile''
You can store the binary data in the database as a BLOB.
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
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