![]() So, first, we use GetImageAsByteArray() from the FileService class to retrieve the image we want to return as an array of bytes. Once we are using the same file result for every request, we don’t need any input parameter. Note that this is an images-byte route with the Get HTTP Verb. Var image = _fileService.GetImageAsByteArray() Now, let’s create our first ReturnByteArray action to return a file using Byte Array: NET/C# content and get paid? > JOIN US! << Return a File in ASP.NET Core Web API As a ByteArray Wanna join Code Maze Team, help us produce more awesome. The MimeType field represents the nature of the file we want to return and the FileName represents a suggestion file name to download. For this article, we are not going into detail about how to do it, however, you can check the FileService class implementation in our source code. The _fileService contains the logic to transform the file into a byte array or a stream. Note that we have a _fileService, a MimeType, and a FileName field. Public DownloadsController(IFileService fileService) ![]() Private const string FileName = "CM-Logo.png" Private const string MimeType = "image/png" Private readonly IFileService _fileService Public class DownloadsController : ControllerBase Once we have an ASP.NET Core Web API ready, let’s create an empty API Controller: ")] You can check the Convert Byte Array to File in C# article to learn more about byte arrays and the C# Back to Basics – Files, StreamWriter and StreamReader to learn more about Stream. The most common class that derives from Stream is FileStream and MemoryStream. PictureBox1.SizeMode = PictureBoxSizeMode.Stream is an abstract class to represent a sequence of bytes. PictureBox1.ClientSize = New Size(300, 300) Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load The Click event of the button named Button1 is coded to stretch the image to a specified size − ![]() We set the image property of the picture box to logo.png, as we used before. In this example, let us put a picture box and a button control on the form. Occurs when the value of the Text property changes. Occurs when the value of the TabStop property changes. Occurs when the value of the TabIndex property changes. Occurs when the Size property value changes. Occurs when the value of the RightToLeft property changes. Occurs when the progress of an asynchronous image-loading operation has changed. ![]() Occurs when the asynchronous image-load operation is completed, been canceled, or raised an exception. Occurs when input focus leaves the PictureBox. Occurs when a key is released when the control has focus. Occurs when a key is pressed when the control has focus. Occurs when the value of the ForeColor property changes. Occurs when the value of the Font property changes. Overrides the Control.CausesValidationChanged property. The following are some of the commonly used methods of the PictureBox control − Specifies whether or not an image is loaded synchronously. Gets or sets the text for the picture box. Specifies whether the user will be able to focus on the picture box by using the TAB key. Zoom − allows increasing or decreasing the image size to maintain the size ratio. StrechImage − allows stretching of the imageĪutoSize − allows resizing the picture box to the size of the imageĬenterImage − allows centering the image in the picture box Normal − the upper left corner of the image is placed at upper left part of the picture box This property takes its value from the PictureBoxSizeMode enumeration, which has values − Gets or sets the image displayed in the control when the main image is loaded.ĭetermines the size of the image to be displayed in the control. Gets or sets the path or the URL for the image displayed in the control. Gets or sets the image that is displayed in the control. Gets or specifies an image to be displayed when an error occurs during the image-loading process or if the image load is cancelled. Specifies whether the picture box accepts data that a user drags on it.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |