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SIGNATURE=IWAppCache.TIWAppCache.StreamToCacheFile@TObject@TStream@string@string@TCacheType

 

ETYPE=Method

 

Declaration:

 

Description: Saves AStream to cache file. Temp filename should be specified

 

Parameters:

•Sender (TObject): May have one of these values

•If you are creating a Form cache file, Sender must be an instance of TIWForm class.

•If you are creating a Session cache file, Sender must be an instance of TIWApplication class, or TIWForm class

•If you are creating an Application cache file, this parameter is ignored, so NIL may be used.

•AStream (TStream): Stream whose content will be saved into the cache file.

•AContentType (string): Content type of the stream.

•ACacheType (TCacheType, default ctSession): Type of cache that will be used. See TCacheType definition.

 

Result: (string) Contains the URL of the cache file.

 

Example:

 

uses

 IWAppCache,      // TIWAppCache

 IW.CacheStream,  // needed because of ACacheType

 Windows;         // needed because of RT_RCDATA reference

 

procedure TIWForm6.IWAppFormCreate(Sender: TObject);

var

 MyStream: TStream;

 HRef: string;

 xResName: string;

begin

 xResName := 'MYIMAGEFILE';

 // get the resource stream containing the image I want to show

 MyStream := TResourceStream.Create(0, PChar(xResName), RT_RCDATA);

 try

   // then create a new cache file and save the image to it.

   //This cache file will be "alive" during the whole user session (ACacheType = ctSession)

   // this function returns the URL to the cache file.

   // We could also use other methods of TIWAppCache

   HRef := TIWAppCache.StreamToCacheFile(Self, MyStream, 'image/gif', ctSession);

   // Set URL of IWImageFile1 with the value returned by TIWAppCache.StreamToCacheFile

   IWImageFile1.ImageFile.URL := HRef;

 finally

   MyStream.Free;

 end;

end;