图像未插入数据库

Question

所以我试图在我正在编写的Web应用程序中添加一些图像上传功能，我遇到了一些问题。出于某种原因，只要我尝试执行图像保存功能，图像就无法插入。

这是我的功能：

Public Sub btnSave_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    If fileupload1.HasFile Then

        Dim pimage(fileupload1.PostedFile.ContentLength - 1) As Byte
        pimage = fileupload1.FileBytes
        Dim pid As String = partnum.Text.ToString
        Dim sConnection As String = "DRIVER={MySQL ODBC 3.51 Driver}; SERVER=localhost; DATABASE=inteva; UID=root; PASSWORD=root; OPTION=3"
        Dim connectme As New OdbcConnection(sConnection)
        Dim sInsertInto As String = "INSERT INTO images(id_num, serial, image1) VALUES(LAST_INSERT_ID(), @pserial, @ppimage)"
        Dim com As New OdbcCommand(sInsertInto, connectme)

        com.Parameters.Add("@pserial", OdbcType.VarChar).Value = pid
        com.Parameters.Add("@ppimage", OdbcType.VarBinary).Value = pimage


        connectme.Open()
        Dim result As Integer = com.ExecuteNonQuery()

        connectme.Close()


        If result > 0 Then
            lblimageup.Text = "Image saved."
        End If

    Else
        lblimageup.Text = "Please select an image file"


    End If

End Sub

关于图像未插入原因的任何想法？