ich erfolgreich hochladen und Bild und Größe ändern. Jetzt möchte ich den Namen meines Bildes in die Datenbank einfügen.Wie füge ich einen Bildnamen in eine Datenbank ein?
Ich benutze SQL Server. Die Tabelle heißt images
und hat zwei Spalten, eine ganze Zahl imageid
und imagename
als string(invarchar(max))
. Ich brauche den Dateinamen in der Image-Spalte gespeichert und imageid
muss eine Identität sein.
Hier ist der Code, den ich bisher habe:
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.IO
Imports System.Data.SqlClient
Imports System.Data
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub btnupload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnupload.Click
Response.Write("Done")
If (IsPostBack) Then
HandleUploadedFile()
End If
End Sub
Private Sub HandleUploadedFile()
' get the root of the web site
Dim root As String = Server.MapPath("~/")
' clean up the path
If Not root.EndsWith("\") Then
root += "\"
End If
' make a folder to store the images in
Dim fileDirectory As String = root & "Images/"
' create the folder if it does not exist
If Not System.IO.Directory.Exists(fileDirectory) Then
System.IO.Directory.CreateDirectory(fileDirectory)
End If
' make a link to the new file
Dim link As String = "<a href='Images/{0}' target='_blank'>{1}</a>{2}{3}"
' loop through the file in the request
For i As Integer = 0 To Request.Files.Count - 1
' get the file instance
Dim fi As HttpPostedFile = Request.Files.[Get](i)
' create a byte array to store the file bytes
Dim fileBytes As Byte() = New Byte(fi.ContentLength - 1) {}
' fill the byte array
Using stream As System.IO.Stream = fi.InputStream
stream.Read(fileBytes, 0, fi.ContentLength)
End Using
' create a random file name
Dim fileName As String = Guid.NewGuid().ToString()
' write the original file to the file system
File.WriteAllBytes(fileDirectory + fileName & ".jpg", fileBytes)
litText.Text += String.Format(link, fileName & ".jpg", fileName & " Original", "<br/>", "")
' write the resized file to the file system
File.WriteAllBytes(fileDirectory + fileName & "_small.jpg", ResizeImageFile(fileBytes, 100))
litText.Text += String.Format(link, fileName & "_small.jpg", fileName & " Small", "<br/>", "<br/>")
' cleanup
litText.Visible = True
fileBytes = Nothing
Next
End Sub
Private Shared Function ResizeImageFile(ByVal imageFile As Byte(), ByVal targetSize As Integer) As Byte()
Using oldImage As System.Drawing.Image = System.Drawing.Image.FromStream(New MemoryStream(imageFile))
Dim newSize As Size = CalculateDimensions(oldImage.Size, targetSize)
Using newImage As New Bitmap(newSize.Width, newSize.Height, PixelFormat.Format24bppRgb)
Using canvas As Graphics = Graphics.FromImage(newImage)
canvas.SmoothingMode = SmoothingMode.AntiAlias
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic
canvas.PixelOffsetMode = PixelOffsetMode.HighQuality
canvas.DrawImage(oldImage, New Rectangle(New Point(0, 0), newSize))
Dim m As New MemoryStream()
newImage.Save(m, ImageFormat.Jpeg)
Return m.GetBuffer()
End Using
End Using
End Using
End Function
Private Shared Function CalculateDimensions(ByVal oldSize As Size, ByVal targetSize As Integer) As Size
Dim newSize As New Size()
If oldSize.Height > oldSize.Width Then
newSize.Width = CInt((oldSize.Width * (CSng(targetSize)/CSng(oldSize.Height))))
newSize.Height = targetSize
Else
newSize.Width = targetSize
newSize.Height = CInt((oldSize.Height * (CSng(targetSize)/CSng(oldSize.Width))))
End If
Return newSize
End Function
End Class
Das kann der Code sein, aber was ist Ihre Frage? –
ich möchte wissen, wie man den Bildnamen in der Datenbank hinzufügt –
Welche Art von Datenbank? Welcher Server? Welches Tabellenschema? Welches OS? Welcher Ausführungskontext? Welche Laufzeitumgebung? Eine Klarstellung, die einfach hinzufügt "Ich will wissen, wie man das Ding tut, das ich vorher nicht erklärt habe", ist eigentlich keine Klarstellung :) –