4
我想将* .aspx(HTML)页面(用户界面)转换为图像,如JPEG。 我使用下面的代码为如何将网页转换为图像?
Protected Sub btnGet_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnGet.Click
saveURLToImage("http://google.co.in")
End Sub
Private Sub saveURLToImage(ByVal url As String)
If Not String.IsNullOrEmpty(url) Then
Dim content As String = ""
Dim webRequest__1 As System.Net.WebRequest = WebRequest.Create(url)
Dim webResponse As System.Net.WebResponse = webRequest__1.GetResponse()
Dim sr As System.IO.StreamReader = New StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"))
content = sr.ReadToEnd()
'save to file
Dim b As Byte() = Convert.FromBase64String(content)
Dim ms As New System.IO.MemoryStream(b, 0, b.Length)
Dim img As System.Drawing.Image = System.Drawing.Image.FromStream(ms)
img.Save("c:\pic.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)
img.Dispose()
ms.Close()
End If
End Sub
但是我收到错误为“在碱-64串无效字符”在线 昏暗b以字节()= Convert.FromBase64String(内容)
是否要保存HTML代码为JPG或者呈现的html(就像你在浏览器中打开url时看到的那样)? – 2010-06-10 08:35:27
我只是问,因为你的代码建议第一个。即使你解决了你的错误,它也不会工作。你不能只是拿一个字符串,并保存为一个像这样的jpeg。你必须以某种形式使用DrawString() – 2010-06-10 08:42:45