PropsGetCount Method (MMixerClass)

VB.Net
C#
Delphi
C++

Public Overridable Sub PropsGetCount( _
   ByVal _bsNodeName As String, _
   ByRef _pnCount As Integer _
)

public virtual void PropsGetCount( 
   string _bsNodeName,
   out int _pnCount
)

public procedure PropsGetCount( 
    _bsNodeName: String;
   Out  _pnCount: Integer
); virtual;

public: virtual void PropsGetCount( 
   BSTR* _bsNodeName,
   [PARAMFLAG::Out] int _pnCount
)

Parameters

_bsNodeName: name of the node
_pnCount: number of properties

Here is example of how to remove all playlist item properties:

Visual Basic
C#
Delphi

Dim myPlaylist As New MPlaylistClass()
myPlaylist.ObjectStart(New Object())
Dim myIndex As Integer = -1
Dim myItem As MItem
myPlaylist.PlaylistAdd(Nothing, "c:\mySourceFile.mp4", "", myIndex, myItem)
myPlaylist.FilePlayStart()
Dim nCount As Integer
DirectCast(myItem, IMProps).PropsGetCount("info", nCount)
For i As Integer = 0 To nCount - 1
Dim myName As String
Dim myValue As String
Dim myNode As Integer
DirectCast(myItem, IMProps).PropsGetByIndex("info", i, myName, myValue, myNode)
DirectCast(myItem, IMProps).PropsRemove(myName)
Next

MPlaylistClass myPlaylist = new MPlaylistClass();
myPlaylist.ObjectStart(new object());
int myIndex = -1;
MItem myItem;
myPlaylist.PlaylistAdd(null, @"c:\mySourceFile.mp4", "", ref myIndex, out myItem);
myPlaylist.FilePlayStart();
int nCount;
((IMProps)myItem).PropsGetCount("info", out nCount);
for (int i=0; i<nCount; i++)
{
string myName;
string myValue;
int myNode;
((IMProps)myItem).PropsGetByIndex("info", i, out myName, out myValue, out myNode);
((IMProps)myItem).PropsRemove(myName);
}

var
myPlaylist: IMPlaylist;
myIndex: integer;
myItem: MItem;
myFile: IMFile;
myValue, myName: widestring;
myProps: IMProps;
myCount, i, myNode: integer;
begin
//configure playlist
myPlaylist:= CreateComObject(CLASS_MPlaylist) as IMPlaylist;
myFile:= myPlaylist as IMFile;
myIndex:=-1;
myPlaylist.PlaylistAdd(nil, 'c:\mySourceFile.mp4', '', myIndex, myItem);
myFile.FilePlayStart();
myProps:= myItem as IMProps;
myProps.PropsGetCount('info', out myCount);
for i:=0 to nCount-1 do
begin
myProps.PropsGetByIndex('info', i, myName, myValue, myNode);
myProps.PropsRemove(myName);
end;
end;

Reference

MMixerClass Class
MMixerClass Members