WebMatrix :: PageData Passes Nulls?

Caller to Draw.cshtml

if (errors == false)
{
PageData["Range"] = zoom;
PageData["StartReal"] = startRe;
PageData["StartImaginary"] = startIm;
PageData["StartColor"] = startColor;
PageData["N"] = N;
PageData["SizePic"] = sizePic;
@:<img src="@Href("Draw.cshtml")" />;
}

Here all variables have a value, however when arriving in Draw.cshtml the PageData all pass as null.

Draw.cshtml
@{
var zoom = PageData["Range"];
var startRe = PageData["StartReal"];
var startIm = PageData["StartImaginary"];
var startColor = PageData["StartColor"];
var N = PageData["N"];
var sizePic = PageData["SizePic"];
Bitmap bitmap = new Bitmap(sizePic, sizePic);
Graphics g = Graphics.FromImage(bitmap);
Pen myPen = new Pen(Color.Red);
juliaset(zoom, startRe, startIm, startColor, N, sizePic, g, myPen);
Response.ContentType = "image/jpeg";
Response.AddHeader("content-disposition", "inline; filename=test.jpg");
bitmap.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
g.Dispose();
bitmap.Dispose();
myPen.Dispose();
}