ImageCodecInfo.GetImageEncoders 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
返回一个由 ImageCodecInfo 对象构成的数组，这些对象包含有关内置于 GDI+ 中的图像编码器的信息。
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。 数组中的每个 ImageCodecInfo 对象都包含有关其中一个内置图像编码器的信息。
示例
下面的示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码使用 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，然后将有关每个编解码器的所有信息绘制到屏幕。
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
