Image Response Type

In This Topic

This topic applies only for non-AJAX modes.

Overview

The image response type is represented by the NImageResponse class deriving from NResponse (the base of all response objects). When the chart generates an image response it will send an img HTML tag pointing to a temporary image file generated on the server.

Modifying The Image Type

The type of the generated image is defined by the object contained in the ImageFormat property of the NImageResponse object. It can be one of the following:

Class	Image Type	Available options
NBitmapImageFormat	Windows Bitmap	Bits per pixel
NGifImageFormat	GIF	Bits per pixel
NJpegImageFormat	JPEG	Bits per pixel, quality
NPngImageFormat	PNG	Bits per pixel
NTiffImageFormat	TIFF	Bits per pixel
NSvgImageFormat	SVG	Compress, EmbedImagesInSvg, EmbeddedImageFormat AddSvgHeader, EnableInteractivity, CustomScript

The following code will change the default response type to true color JPEG with quality parameter set to 90 percent:

C#	Copy Code
NImageResponse imageResponse = new NImageResponse(); NJpegImageFormat jpegImageFormat = new NJpegImageFormat(); jpegImageFormat.Quality = 90; jpegImageFormat.PixelFormat = PixelFormat.Format32bppArgb; imageResponse.ImageFormat = jpegImageFormat; //[theComponent] is a valid instance of either NChartControl or NDrawingView [theComponent].ServerSettings.BrowserResponseSettings.DefaultResponse = imageResponse;

Copy Code

NImageResponse imageResponse = new NImageResponse();

NJpegImageFormat jpegImageFormat = new NJpegImageFormat();
jpegImageFormat.Quality = 90;
jpegImageFormat.PixelFormat = PixelFormat.Format32bppArgb;
imageResponse.ImageFormat = jpegImageFormat;

//[theComponent] is a valid instance of either NChartControl or NDrawingView
[theComponent].ServerSettings.BrowserResponseSettings.DefaultResponse = imageResponse;

Visual Basic	Copy Code
Dim imageResponse As New NImageResponse Dim jpegImageFormat As New NJpegImageFormat jpegImageFormat.Quality = 90 jpegImageFormat.PixelFormat = PixelFormat.Format32bppArgb imageResponse.ImageFormat = jpegImageFormat '[theComponent] is a valid instance of either NChartControl or NDrawingView [theComponent].ServerSettings.BrowserResponseSettings.DefaultResponse = imageResponse

Visual Basic

Copy Code

Dim imageResponse As New NImageResponse
Dim jpegImageFormat As New NJpegImageFormat

jpegImageFormat.Quality = 90
jpegImageFormat.PixelFormat = PixelFormat.Format32bppArgb
imageResponse.ImageFormat = jpegImageFormat

'[theComponent] is a valid instance of either NChartControl or NDrawingView
[theComponent].ServerSettings.BrowserResponseSettings.DefaultResponse = imageResponse