Die beste Weg, um ein Bild mit einem anderen Bild stempeln ein Wasserzeichen in ASP.NET zu erstellen?
Frage
Wer weiß? Will in der Lage sein, on the fly mit einem anderen Bild als Wasserzeichen ein Bild Stempel, auch große Chargen zu tun. Jede Art von vorhandener Bibliothek oder einer Technik, die Sie wissen, wäre toll.
Lösung
Dies wird Ihre Frage beantworten:
http://www.codeproject.com/KB/GDI-plus/ watermark.aspx
Viel Glück!
Andere Tipps
Ich habe viel Glück gehabt mit ImageMagick . Es verfügt über einen API für .NET rel="nofollow zu.
Hier ist mein ganzer Artikel: http://forums.asp.net/p /1323176/2634923.aspx
, um die SDK-Eingabeaufforderung verwenden und die aktiven Ordner in die Ordner, die unter dem Sourcecode enthalten ... dann kompilieren Sie den Code mit
vbc.exe watermark.vb /t:exe /out:watermark.exe
Dies wird eine exe im Ordner erstellen .. die exe akzeptiert zwei Parameter: ex.
watermark.exe "c:\source folder" "c:\destination folder"
Dies wird durchlaufen den übergeordneten Ordner und alle Unterordner. alle gefundenen JPEG-Dateien werden Sie den Code ein und kopiert in den Zielordner festlegen, mit dem Bild mit Wasserzeichen versehen werden. Das Originalbild bleibt unberührt.
// watermark.vb -
Imports System
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.IO
Namespace WatermarkManager
Class Watermark
Shared sourceDirectory As String = "", destinationDirectory As String = ""
Overloads Shared Sub Main(ByVal args() As String)
'See if an argument was passed from the command line
If args.Length = 2 Then
sourceDirectory = args(0)
destinationDirectory = args(1)
' make sure sourceFolder is legit
If Directory.Exists(sourceDirectory) = False
TerminateExe("Invalid source folder. Folder does not exist.")
Exit Sub
End If
' try and create destination folder
Try
Directory.CreateDirectory(destinationDirectory)
Catch
TerminateExe("Error creating destination folder. Invalid path cannot be created.")
Exit Sub
End Try
' start the magic
CreateHierarchy(sourceDirectory,destinationDirectory)
ElseIf args.Length = 1
If args(0) = "/?"
DisplayHelp()
Else
TerminateExe("expected: watermark.exe [source path] [destination path]")
End If
Exit Sub
Else
TerminateExe("expected: watermark.exe [source path] [destination path]")
Exit Sub
End If
TerminateExe()
End Sub
Shared Sub CreateHierarchy(ByVal sourceDirectory As String, ByVal destinationDirectory As String)
Dim tmpSourceDirectory As String = sourceDirectory
' copy directory hierarchy to destination folder
For Each Item As String In Directory.GetDirectories(sourceDirectory)
Directory.CreateDirectory(destinationDirectory + Item.SubString(Item.LastIndexOf("\")))
If hasSubDirectories(Item)
CreateSubDirectories(Item)
End If
Next
' reset destinationDirectory
destinationDirectory = tmpSourceDirectory
' now that folder structure is set up, let's iterate through files
For Each Item As String In Directory.GetDirectories(sourceDirectory)
SearchDirectory(Item)
Next
End Sub
Shared Function hasSubDirectories(ByVal path As String) As Boolean
Dim subdirs() As String = Directory.GetDirectories(path)
If subdirs.Length > 0
Return True
End If
Return False
End Function
Shared Sub CheckFiles(ByVal path As String)
For Each f As String In Directory.GetFiles(path)
If f.SubString(f.Length-3).ToLower = "jpg"
WatermarkImage(f)
End If
Next
End Sub
Shared Sub WatermarkImage(ByVal f As String)
Dim img As System.Drawing.Image = System.Drawing.Image.FromFile(f)
Dim graphic As Graphics
Dim indexedImage As New Bitmap(img)
graphic = Graphics.FromImage(indexedImage)
graphic.DrawImage(img, 0, 0, img.Width, img.Height)
img = indexedImage
graphic.SmoothingMode = SmoothingMode.AntiAlias
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic
Dim x As Integer, y As Integer
Dim source As New Bitmap("c:\watermark.png")
Dim logo As New Bitmap(source, CInt(img.Width / 3), CInt(img.Width / 3))
source.Dispose()
x = img.Width - logo.Width
y = img.Height - logo.Height
graphic.DrawImage(logo, New Point(x,y))
logo.Dispose()
img.Save(destinationDirectory+f.SubString(f.LastIndexOf("\")), ImageFormat.Jpeg)
indexedImage.Dispose()
img.Dispose()
graphic.Dispose()
Console.WriteLine("successfully watermarked " + f.SubString(f.LastIndexOf("\")+1))
Console.WriteLine("saved to: " + vbCrLf + destinationDirectory + vbCrLf)
End Sub
Shared Sub SearchDirectory(ByVal path As String)
destinationDirectory = destinationDirectory + path.SubString(path.LastIndexOf("\"))
CheckFiles(path)
For Each Item As String In Directory.GetDirectories(path)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
CheckFiles(Item)
If hasSubDirectories(Item)
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
SearchDirectory(Item)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
End If
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
Next
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
End Sub
Shared Sub CreateSubDirectories(ByVal path As String)
destinationDirectory = destinationDirectory + path.SubString(path.LastIndexOf("\"))
For Each Item As String In Directory.GetDirectories(path)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
Directory.CreateDirectory(destinationDirectory)
Console.WriteLine(vbCrlf + "created: " + vbCrlf + destinationDirectory)
If hasSubDirectories(Item)
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
CreateSubDirectories(Item)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
End If
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
Next
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
End Sub
Shared Sub TerminateExe(ByVal Optional msg As String = "")
If msg ""
Console.WriteLine(vbCrLf + "AN ERROR HAS OCCURRED //" + vbCrLf + msg)
End If
Console.WriteLine(vbCrLf + "Press [enter] to close...")
'Console.Read()
End Sub
Shared Sub DisplayHelp()
Console.WriteLine("watermark.exe accepts two parameters:" + vbCrLf + " - [source folder]")
Console.WriteLine(" - [destination folder]")
Console.WriteLine("ex." + vbCrLf + "watermark.exe ""c:\web_projects\dclr source"" ""d:\new_dclr\copy1 dest""")
Console.WriteLine(vbCrLf + "Press [enter] to close...")
Console.Read()
End Sub
End Class
End Namespace