有可能以programmaticaly方式保存给定URL的图形格式吗？ [英] Is is possible to programmaticaly save a graphic forma given URL?

问题描述

好吧..也许我正在尝试错误的做法。如果给出了图形的URL，我想要将该图形保存到本地文件中。下面的方法获得了

响应，但我无法弄清楚如何将其保存到文件中。在这个

实例中，创建了一个文件，但它只包含文本

" System.Io.StreamReader"我也尝试过writer.write（reader.ReadToEnd），

但该文件仍然没有显示任何内容。

Dim URL As String = GraphicURL


Dim request As WebRequest = WebRequest.Create（URL）


Dim response As WebResponse = request.GetResponse（）


Dim reader As StreamReader = New


StreamReader（response.GetResponseStream（））

Dim writer As StreamWriter = New StreamWriter（" C：\\ \\ temp \"& GraphicKey&

" .jpg"）


writer.Write（读者）

writer.Close（）


reader.Close（）


response.Close（）

Stacey Levine

Ok.. Maybe I am trying the wrong approach. If given a URL to a graphic, I
want to save that graphic to a local file. The approach below gets the
response, but I can''t quite figure out how to save it to a file. In this
instance, a file gets created but it only contains the text
"System.Io.StreamReader" I have also tried writer.write(reader.ReadToEnd),
but the file still displays nothing.
Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create(URL)

Dim response As WebResponse = request.GetResponse()

Dim reader As StreamReader = New

StreamReader(response.GetResponseStream())

Dim writer As StreamWriter = New StreamWriter("C:\temp\" & GraphicKey &
".jpg")

writer.Write(reader)

writer.Close()

reader.Close()

response.Close()
Stacey Levine

推荐答案

是的，你正在写读者，而不是写读者的内容

阅读： ）尝试写reader.readtoend（或其他）。

Stacey Levine < ST **** @ newsgroup.nospam>在消息中写道

news：％2 **************** @ TK2MSFTNGP09.phx.gbl ...

Yes, you are writing the reader, rather than writing what the reader is
reading :) Try writing reader.readtoend (or something).
"Stacey Levine" <st****@newsgroup.nospam> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

好的。也许我正在尝试错误的方法。如果给出了图形的URL，我想将该图形保存到本地文件中。下面的方法得到了
响应，但我无法弄清楚如何将其保存到文件中。在这个实例中，创建了一个文件，但它只包含文本
System.Io.StreamReader。我也尝试过writer.write（reader.ReadToEnd），
但文件仍然没有显示。

Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create（URL）

昏暗的响应As WebResponse = request.GetResponse（）

Dim reader As StreamReader = New

StreamReader（响应） .GetResponseStream（））

Dim writer As StreamWriter = New StreamWriter（" C：\ temp \"& GraphicKey&
" .jpg"）
writer.Write（读者）

writer.Close（）

reader.Close（）

response.Close（）

Stacey Levine

Ok.. Maybe I am trying the wrong approach. If given a URL to a graphic, I
want to save that graphic to a local file. The approach below gets the
response, but I can''t quite figure out how to save it to a file. In this
instance, a file gets created but it only contains the text
"System.Io.StreamReader" I have also tried writer.write(reader.ReadToEnd),
but the file still displays nothing.
Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create(URL)

Dim response As WebResponse = request.GetResponse()

Dim reader As StreamReader = New

StreamReader(response.GetResponseStream())

Dim writer As StreamWriter = New StreamWriter("C:\temp\" & GraphicKey &
".jpg")

writer.Write(reader)

writer.Close()

reader.Close()

response.Close()
Stacey Levine

我确实尝试过writer.write（reader.ReadToEnd），而且文件还有更多数据..它

都是十六进制..但它仍然不会打开图片。我不确定我是否错过了写作的东西。

Robin Tucker <编号********** @ reallyidont.com>写在

消息新闻：da ******************* @ news.demon.co.uk ...

I did try writer.write(reader.ReadToEnd), and the file has more data.. it
is all hex.. but it still won''t open as a picture. I am not sure if I missed
writing something.
"Robin Tucker" <id*************************@reallyidont.com> wrote in
message news:da*******************@news.demon.co.uk...

是的，你正在写读者，而不是写作读者阅读的内容:)尝试写一下reader.readtoend（或其他东西）。

" Stacey Levine" < ST **** @ newsgroup.nospam>在消息中写道
新闻：％2 **************** @ TK2MSFTNGP09.phx.gbl ...

Yes, you are writing the reader, rather than writing what the reader is
reading :) Try writing reader.readtoend (or something).
"Stacey Levine" <st****@newsgroup.nospam> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

好的..也许我是尝试错误的方法。如果给出了图形的URL，我想将该图形保存到本地文件中。下面的方法得到了
响应，但我无法弄清楚如何将其保存到文件中。在这个实例中，创建了一个文件，但它只包含文本
System.Io.StreamReader。我也试过了
writer.write（reader.ReadToEnd），但文件仍然没有显示。

Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create（URL）

昏暗的响应As WebResponse = request.GetResponse（）

Dim reader As StreamReader = New

StreamReader（响应） .GetResponseStream（））

Dim writer As StreamWriter = New StreamWriter（" C：\ temp \"& GraphicKey&
" .jpg"）
writer.Write（读者）

writer.Close（）

reader.Close（）

response.Close（）

Stacey Levine

Ok.. Maybe I am trying the wrong approach. If given a URL to a graphic, I
want to save that graphic to a local file. The approach below gets the
response, but I can''t quite figure out how to save it to a file. In this
instance, a file gets created but it only contains the text
"System.Io.StreamReader" I have also tried
writer.write(reader.ReadToEnd), but the file still displays nothing.
Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create(URL)

Dim response As WebResponse = request.GetResponse()

Dim reader As StreamReader = New

StreamReader(response.GetResponseStream())

Dim writer As StreamWriter = New StreamWriter("C:\temp\" & GraphicKey &
".jpg")

writer.Write(reader)

writer.Close()

reader.Close()

response.Close()
Stacey Levine

另一个奇怪的位...当我保存文件使用reader.ReadToEnd ..

文件有1302个字节。

如果我右键单击图像保存，它有2257个字节。


非常非常奇怪


" Stacey Levine" < ST **** @ newsgroup.nospam>在消息中写道

news：％2 **************** @ TK2MSFTNGP09.phx.gbl ...

One other wierd bit.. when I save the file using the reader.ReadToEnd ..
the file has 1302 bytes.
If I right click the image and save it, it has 2257 bytes.

very very wierd

"Stacey Levine" <st****@newsgroup.nospam> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

好的。也许我正在尝试错误的方法。如果给出了图形的URL，我想将该图形保存到本地文件中。下面的方法得到了
响应，但我无法弄清楚如何将其保存到文件中。在这个实例中，创建了一个文件，但它只包含文本
System.Io.StreamReader。我也尝试过writer.write（reader.ReadToEnd），
但文件仍然没有显示。

Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create（URL）

昏暗的响应As WebResponse = request.GetResponse（）

Dim reader As StreamReader = New

StreamReader（响应） .GetResponseStream（））

Dim writer As StreamWriter = New StreamWriter（" C：\ temp \"& GraphicKey&
" .jpg"）
writer.Write（读者）

writer.Close（）

reader.Close（）

response.Close（）

Stacey Levine

Ok.. Maybe I am trying the wrong approach. If given a URL to a graphic, I
want to save that graphic to a local file. The approach below gets the
response, but I can''t quite figure out how to save it to a file. In this
instance, a file gets created but it only contains the text
"System.Io.StreamReader" I have also tried writer.write(reader.ReadToEnd),
but the file still displays nothing.
Dim URL As String = GraphicURL

Dim request As WebRequest = WebRequest.Create(URL)

Dim response As WebResponse = request.GetResponse()

Dim reader As StreamReader = New

StreamReader(response.GetResponseStream())

Dim writer As StreamWriter = New StreamWriter("C:\temp\" & GraphicKey &
".jpg")

writer.Write(reader)

writer.Close()

reader.Close()

response.Close()
Stacey Levine

这篇关于有可能以programmaticaly方式保存给定URL的图形格式吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！