ImageCodecInfo.GetImageEncoders 方法

定义

返回 ImageCodecInfo 对象的数组,这些对象包含有关内置在 GDI+ 中的图像编码器的信息。Returns an array of ImageCodecInfo objects that contain information about the image encoders built into GDI+.

public:
 static cli::array <System::Drawing::Imaging::ImageCodecInfo ^> ^ GetImageEncoders();
public static System.Drawing.Imaging.ImageCodecInfo[] GetImageEncoders ();
static member GetImageEncoders : unit -> System.Drawing.Imaging.ImageCodecInfo[]
Public Shared Function GetImageEncoders () As ImageCodecInfo()

返回

ImageCodecInfo 对象的数组。An array of ImageCodecInfo objects. 数组中的每个 ImageCodecInfo 对象都包含有关某一个内置图像编码解码器的信息。Each ImageCodecInfo object in the array contains information about one of the built-in image encoders.

示例

下面的示例旨在与 Windows 窗体一起使用,并且它需要 PaintEventArgse,它是 Paint 事件处理程序的参数。The following example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. 代码使用 GetImageEncoders 方法检索所有已安装的图像编码器和编解码器的所有编解码器信息,然后在屏幕上绘制每个编解码器的相关信息。The code uses the GetImageEncoders method to retrieve all the codec information for all installed image encoders and codecs, and then draws all the information about each codec to the screen.

private:
    void GetImageEncodersExample(PaintEventArgs^ e)
    {
        // Get an array of available codecs.
        array<ImageCodecInfo^>^ codecInfo;
        codecInfo = ImageCodecInfo::GetImageEncoders();
        int numCodecs = codecInfo->GetLength(0);

        //numCodecs = 1;

        // Set up display variables.
        Color^ foreColor = Color::Black;
        Drawing::Font^ font = gcnew Drawing::Font("Arial", 8);

        // Check to determine whether any codecs were found.
        if (numCodecs > 0)
        {
            // Set up an array to hold codec information. There are 9
            // information elements plus 1 space for each codec, so 10
            // times the number of codecs found is allocated.
            array<String^>^ codecInfoStrings = 
                gcnew array<String^>(numCodecs * 10);

            // Write all the codec information to the array.
            for (int i = 0; i < numCodecs; i++)
            {
                codecInfoStrings[i * 10] = "Codec Name = " +
                    codecInfo[i]->CodecName;
                codecInfoStrings[(i * 10) + 1] = "Class ID = " +
                    codecInfo[i]->Clsid.ToString();
                codecInfoStrings[(i * 10) + 2] = "DLL Name = " +
                    codecInfo[i]->DllName;
                codecInfoStrings[(i * 10) + 3] = "Filename Ext. = " +
                    codecInfo[i]->FilenameExtension;
                codecInfoStrings[(i * 10) + 4] = "Flags = " +
                    codecInfo[i]->Flags.ToString();
                codecInfoStrings[(i * 10) + 5] = "Format Descrip. = " +
                    codecInfo[i]->FormatDescription;
                codecInfoStrings[(i * 10) + 6] = "Format ID = " +
                    codecInfo[i]->FormatID.ToString();
                codecInfoStrings[(i * 10) + 7] = "MimeType = " +
                    codecInfo[i]->MimeType;
                codecInfoStrings[(i * 10) + 8] = "Version = " +
                    codecInfo[i]->Version.ToString();
                codecInfoStrings[(i * 10) + 9] = " ";
            }
            int numCodecInfo = codecInfoStrings->GetLength(0);

            // Render all of the information to the screen.
            int j = 20;
            for (int i = 0; i < numCodecInfo; i++)
            {
                e->Graphics->DrawString(codecInfoStrings[i],
                    font, gcnew SolidBrush(*foreColor), 20, (float)j);
                j += 12;
            }
        }
        else
            e->Graphics->DrawString("No Codecs Found",
                font, gcnew SolidBrush(*foreColor), 20, 20);
    }
private void GetImageEncodersExample(PaintEventArgs e)
{
             
    // Get an array of available codecs.
    ImageCodecInfo[] myCodecs;
    myCodecs = ImageCodecInfo.GetImageEncoders();
    int numCodecs = myCodecs.GetLength(0);
             
    //numCodecs = 1;
             
    // Set up display variables.
    Color foreColor = Color.Black;
    Font font = new Font("Arial", 8);
    int i = 0;
             
    // Check to determine whether any codecs were found.
    if(numCodecs > 0)
    {
             
        // Set up an array to hold codec information. There are 9
             
        // information elements plus 1 space for each codec, so 10 times
             
        // the number of codecs found is allocated.
        string[] myCodecInfo = new string[numCodecs*10];
             
        // Write all the codec information to the array.
        for(i=0;i<numCodecs;i++)
        {
            myCodecInfo[i*10] = "Codec Name = " + myCodecs[i].CodecName;
            myCodecInfo[(i*10)+1] = "Class ID = " +
                myCodecs[i].Clsid.ToString();
            myCodecInfo[(i*10)+2] = "DLL Name = " + myCodecs[i].DllName;
            myCodecInfo[(i*10)+3] = "Filename Ext. = " +
                myCodecs[i].FilenameExtension;
            myCodecInfo[(i*10)+4] = "Flags = " +
                myCodecs[i].Flags.ToString();
            myCodecInfo[(i*10)+5] = "Format Descrip. = " +
                myCodecs[i].FormatDescription;
            myCodecInfo[(i*10)+6] = "Format ID = " +
                myCodecs[i].FormatID.ToString();
            myCodecInfo[(i*10)+7] = "MimeType = " + myCodecs[i].MimeType;
            myCodecInfo[(i*10)+8] = "Version = " +
                myCodecs[i].Version.ToString();
            myCodecInfo[(i*10)+9] = " ";
        }
        int numMyCodecInfo = myCodecInfo.GetLength(0);
             
        // Render all of the information to the screen.
        int j=20;
        for(i=0;i<numMyCodecInfo;i++)
        {
            e.Graphics.DrawString(myCodecInfo[i],
                font,
                new SolidBrush(foreColor),
                20,
                j);
            j+=12;
        }
    }
    else
        e.Graphics.DrawString("No Codecs Found",
            font,
            new SolidBrush(foreColor),
            20,
            20);
}
Public Sub GetImageEncodersExample(ByVal e As PaintEventArgs)

    ' Get an array of available codecs.
    Dim myEncoders() As ImageCodecInfo
    myEncoders = ImageCodecInfo.GetImageEncoders()
    Dim numEncoders As Integer = myEncoders.GetLength(0)
    Dim strNumEncoders As String = numEncoders.ToString()
    Dim foreColor As Color = Color.Black
    Dim font As New Font("Arial", 8)
    Dim i As Integer = 0

    ' Get the info. for all encoders in the array.
    If numEncoders > 0 Then
        Dim myEncoderInfo(numEncoders * 10) As String
        For i = 0 To numEncoders - 1
            myEncoderInfo((i * 10)) = "Codec Name = " _
            + myEncoders(i).CodecName
            myEncoderInfo((i * 10 + 1)) = "Class ID = " _
            + myEncoders(i).Clsid.ToString()
            myEncoderInfo((i * 10 + 2)) = "DLL Name = " _
            + myEncoders(i).DllName
            myEncoderInfo((i * 10 + 3)) = "Filename Ext. = " _
            + myEncoders(i).FilenameExtension
            myEncoderInfo((i * 10 + 4)) = "Flags = " _
            + myEncoders(i).Flags.ToString()
            myEncoderInfo((i * 10 + 5)) = "Format Descrip. = " _
            + myEncoders(i).FormatDescription
            myEncoderInfo((i * 10 + 6)) = "Format ID = " _
            + myEncoders(i).FormatID.ToString()
            myEncoderInfo((i * 10 + 7)) = "MimeType = " _
            + myEncoders(i).MimeType
            myEncoderInfo((i * 10 + 8)) = "Version = " _
            + myEncoders(i).Version.ToString()
            myEncoderInfo((i * 10 + 9)) = " "
        Next i
        Dim numMyEncoderInfo As Integer = myEncoderInfo.GetLength(0)

        ' Render to the screen all the information.
        Dim j As Integer = 20
        For i = 0 To numMyEncoderInfo - 1
            e.Graphics.DrawString(myEncoderInfo(i), font, _
            New SolidBrush(foreColor), 20, j)
            j += 12
        Next i
    Else
        e.Graphics.DrawString("No Encoders Found", font, _
        New SolidBrush(foreColor), 20, 20)
    End If
End Sub

适用于