3/12/2024 0 Comments Vbnet load png images into memory![]() ![]() Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clickĭim img As Image = Image.FromFile("d:\bank-copy.png") Return (byte)imgCon.ConvertTo(inImg, typeof(byte)) ImageConverter imgCon = new ImageConverter() Public static byte imgToByteConverter(Image inImg) another easy way to convert image to bytearray Using (MemoryStream mStream = new MemoryStream(byteArrayIn)) Public Image byteArrayToImage(byte byteArrayIn) Using (MemoryStream mStream = new MemoryStream()) Again convert byteArray to image and displayed in a picturebox Image img = Image.FromFile("d:\\bank-copy.png") Private void button1_Click(object sender, EventArgs e) Since the MemoryStream object resides in memory, it facilitates easy conversion into a byte array using the ToArray function, which is a method available to the MemoryStream object. In this context, the save function is applied to the MemoryStream object, with the option to specify an image format. NET Framework provides a convenient save function that enables developers to preserve an image to a file in various supported image formats. Implementing the fastest and memory-efficient conversion methods ensures optimal performance and resource utilization, ultimately leading to enhanced overall efficiency in handling image data. This allows for streamlined processing and transmission of image data, making it suitable for various applications, such as image compression, data storage, and transmission over networks. There exist several methods to perform this conversion, but in this context, we present the two fastest and most memory-efficient approaches to achieve this task.Ĭonverting images to byte arrays, developers can access and manipulate the image data directly in a compact and convenient format. They offer advantages such as easy comparison, compression, storage, and effortless conversion to other data types. This conversion proves highly useful in a variety of scenarios due to the versatility of byte arrays. Result = New numerous situations, converting an image to a byte array becomes a necessity. ' create a VintasoftImage object, which is based on the memory stream ' IMPORTANT: Do not dispose the memory stream because it will be disposed ' automatically when the VintasoftImage object is disposed ' if image is retrieved from the database If imageAsByteArray IsNot Nothing Then ' create a memory stream, which will store the image Dim mem As New System.IO.MemoryStream(imageAsByteArray) ' execute the SQL command and get image from the database Dim imageAsByteArray As Byte() = DirectCast(m圜ommand.ExecuteScalar(), Byte()) ' create the SQL command Dim m圜ommand As New (sqlCommand, m圜onnection) the text of SQL query string sqlCommand = string.Format( "SELECT ImageData FROM WHERE ImageId = ", imageId) the connection string, which is used for opening the databae string connectionString = "Provider=.4.0 Data Source=image.mdb" VintasoftImage LoadImageFromMSAccessDatabase( int imageId) / /// The image identifier in database. / /// Returns an image from Microsoft Access database. Here is an example that shows how to load an image from PNG file and save to a JPEG file: Image or document file can be located in memory, on disk, network or database.Īlso SDK can load image from HBITMAP, or .BitmapSource object stored in memory. XPS (XML Paper Specification) - available in WPF edition only.XLSX (Microsoft Word Open XML Format Document) - VintaSoft Office.TIFF (Tagged Image File Format), Big TIFF, single/multipage.CR2 (Canon Digital Camera Raw Image Format).PDF (Portable Document Format), PDF/A, single/multipage - VintaSoft PDF.PBM (Portable Bitmap), PGM (Portable Graymap), PPM (Portable Pixmap).JBIG2 (Joint Bi-level Image Experts Group), single/multipage - VintaSoft JBIG2.GIF (Graphics Interchange Format), animated GIF.DOCX (Microsoft Word Open XML Format Document) - VintaSoft Office.DOC (Microsoft Word Binary Format Document) - VintaSoft Office.DICOM (Digital Imaging and Communications in Medicine) - VintaSoft DICOM.SDK can load images from the following image and document file formats: ![]()
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