Encoder.SaveFlag Field

Definition

Represents an Encoder object that is initialized with the globally unique identifier for the save flag parameter category.

public static readonly System.Drawing.Imaging.Encoder SaveFlag;

Field Value

Examples

The following example creates three Bitmap objects: one from a BMP file, one from a JPEG file, and one from a PNG file. The code saves all three images in a single, multiple-frame TIFF file.

using System;
using System.Drawing;
using System.Drawing.Imaging;
class Example_MultiFrame
{
    public static void Main()
    {
        Bitmap multi;
        Bitmap page2;
        Bitmap page3;
        ImageCodecInfo myImageCodecInfo;
        Encoder myEncoder;
        EncoderParameter myEncoderParameter;
        EncoderParameters myEncoderParameters;
                     
        // Create three Bitmap objects.
        multi = new Bitmap("Shapes.bmp");
        page2 = new Bitmap("Iron.jpg");
        page3 = new Bitmap("House.png");
                     
        // Get an ImageCodecInfo object that represents the TIFF codec.
        myImageCodecInfo = GetEncoderInfo("image/tiff");
                     
        // Create an Encoder object based on the GUID
        // for the SaveFlag parameter category.
        myEncoder = Encoder.SaveFlag;
                     
        // Create an EncoderParameters object.
        // An EncoderParameters object has an array of EncoderParameter
        // objects. In this case, there is only one
        // EncoderParameter object in the array.
        myEncoderParameters = new EncoderParameters(1);
                     
        // Save the first page (frame).
        myEncoderParameter = new EncoderParameter(
            myEncoder,
            (long)EncoderValue.MultiFrame);
        myEncoderParameters.Param[0] = myEncoderParameter;
        multi.Save("Multiframe.tiff", myImageCodecInfo, myEncoderParameters);
                     
        // Save the second page (frame).
        myEncoderParameter = new EncoderParameter(
            myEncoder,
            (long)EncoderValue.FrameDimensionPage);
        myEncoderParameters.Param[0] = myEncoderParameter;
        multi.SaveAdd(page2, myEncoderParameters);
                     
        // Save the third page (frame).
        myEncoderParameter = new EncoderParameter(
            myEncoder,
            (long)EncoderValue.FrameDimensionPage);
        myEncoderParameters.Param[0] = myEncoderParameter;
        multi.SaveAdd(page3, myEncoderParameters);
                     
        // Close the multiple-frame file.
        myEncoderParameter = new EncoderParameter(
            myEncoder,
            (long)EncoderValue.Flush);
        myEncoderParameters.Param[0] = myEncoderParameter;
        multi.SaveAdd(myEncoderParameters);
    }
    private static ImageCodecInfo GetEncoderInfo(String mimeType)
    {
        int j;
        ImageCodecInfo[] encoders;
        encoders = ImageCodecInfo.GetImageEncoders();
        for(j = 0; j < encoders.Length; ++j)
        {
            if(encoders[j].MimeType == mimeType)
                return encoders[j];
        }
        return null;
    }
}

Remarks

When you pass a parameter to an image encoder, the parameter is encapsulated in an EncoderParameter object. One of the fields of the EncoderParameter object is a GUID that specifies the category of the parameter. Use the static fields of the Encoder class to retrieve an Encoder that contains parameters of the desired category.

The image encoders that are built into GDI+ receive parameters that belong to several categories. The following table lists all the categories and the GUID associated with each category.

ChrominanceTable f2e455dc-09b3-4316-8260-676ada32481c

ColorDepth 66087055-ad66-4c7c-9a18-38a2310b8337

Compression e09d739d-ccd4-44ee-8eba-3fbf8be4fc58

LuminanceTable edb33bce-0266-4a77-b904-27216099e717

Quality 1d5be4b5-fa4a-452d-9cdd-5db35105e7eb

RenderMethod 6d42c53a-229a-4825-8bb7-5c99e2b9a8b8

SaveFlag 292266fc-ac40-47bf-8cfc-a85b89a655de

ScanMethod 3a4e2661-3109-4e56-8536-42c156e7dcfa

Transformation 8d0eb2d1-a58e-4ea8-aa14-108074b7b6f9

Version 24d18c76-814a-41a4-bf53-1c219cccf797

Applies to

Product Versions
.NET 8 (package-provided), 9 (package-provided)
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also