System.Drawing.Image.FromStream() "Parametro non valido" su Windows XP

Question

Quanto segue funziona bene sul mio computer di sviluppo Windows 7, tuttavia quando viene eseguito su Windows XP viene visualizzato ed è possibile che venga visualizzato il messaggio di errore "Il parametro non è valido" in l'ultima riga?

private string base64String = 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AAAAAAAAAAAAAAAAAAHmwdXmwdXmwdXmwdQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP///////n////x////8f////H////x////4f///+H////h////4P///+D////A////wH///8B////APwf/wDgD/8AAB//AAP//wAP/P8AP/h+AH/wAAB/8AAAf/AAAH/wAAAf+AGAAAwHgAAf/8AAP//gD///8B////h///////"; 

byte[] bytes = Convert.FromBase64String(base64String); 
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes); 
System.Drawing.Image b = System.Drawing.Image.FromStream(ms, false, false); 

Questa stringa di stringa base64 funziona correttamente su entrambi i sistemi operativi. È anche un'icona, ma di dimensioni più ridotte:

"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" 

Answer 1

XP sta davvero diventando lungo nel dente. L'unica cosa che manca è la versione 1.10 di gdiplus.dll, l'aggiornamento a GDI + fornito per la prima volta con Vista. Un sacco di correzioni in quella versione, per ora supporta effettivamente ImageFormat.Icon.

I dati dell'immagine rappresentano un file .ico. Utilizzare invece il costruttore Icon (Stream). Potresti avere ancora un problema con le icone 24bpp, non ho più modo di verificarlo.

Answer 2

using (MemoryStream ms = new MemoryStream()) 
    { 
     image.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg); 
     ms.Seek(0,0); 
     byte[] data = new byte[0]; 
     data = ms.ToArray();   
    } 

voglio accedere ai dati al di fuori del bracket.how fare