Stream GetImageStream(Report rpt, Row row, out string mtype)
{
mtype = null;
Stream strm = null;
try
{
switch (this.ImageSource)
{
case ImageSourceEnum.Database:
if (_MIMEType == null)
{
return(null);
}
mtype = _MIMEType.EvaluateString(rpt, row);
object o = _Value.Evaluate(rpt, row);
strm = new MemoryStream((byte[])o);
break;
case ImageSourceEnum.Embedded:
string name = _Value.EvaluateString(rpt, row);
EmbeddedImage ei = (EmbeddedImage)OwnerReport.LUEmbeddedImages[name];
mtype = ei.MIMEType;
byte[] ba = Convert.FromBase64String(ei.ImageData);
strm = new MemoryStream(ba);
break;
case ImageSourceEnum.External:
string fname = _Value.EvaluateString(rpt, row);
mtype = GetMimeType(fname);
if (fname.StartsWith("http:") ||
fname.StartsWith("file:") ||
fname.StartsWith("https:"))
{
WebRequest wreq = WebRequest.Create(fname);
WebResponse wres = wreq.GetResponse();
strm = wres.GetResponseStream();
}
else
{
strm = new FileStream(fname, System.IO.FileMode.Open, FileAccess.Read);
}
break;
default:
return(null);
}
}
catch (Exception e)
{
if (strm != null)
{
strm.Close();
strm = null;
}
rpt.rl.LogError(4, string.Format("Unable to load image. {0}", e.Message));
}
return(strm);
}
List <EmbeddedImage> _Items; // list of EmbeddedImage
internal EmbeddedImages(ReportDefn r, ReportLink p, XmlNode xNode) : base(r, p)
{
_Items = new List <EmbeddedImage>();
// Loop thru all the child nodes
foreach (XmlNode xNodeLoop in xNode.ChildNodes)
{
if (xNodeLoop.NodeType != XmlNodeType.Element)
{
continue;
}
if (xNodeLoop.Name == "EmbeddedImage")
{
EmbeddedImage ei = new EmbeddedImage(r, this, xNodeLoop);
_Items.Add(ei);
}
else
{
this.OwnerReport.rl.LogError(4, "Unknown Report element '" + xNodeLoop.Name + "' ignored.");
}
}
if (_Items.Count == 0)
{
OwnerReport.rl.LogError(8, "For EmbeddedImages at least one EmbeddedImage is required.");
}
else
{
_Items.TrimExcess();
}
}
List<EmbeddedImage> _Items; // list of EmbeddedImage
#endregion Fields
#region Constructors
internal EmbeddedImages(ReportDefn r, ReportLink p, XmlNode xNode)
: base(r, p)
{
_Items = new List<EmbeddedImage>();
// Loop thru all the child nodes
foreach(XmlNode xNodeLoop in xNode.ChildNodes)
{
if (xNodeLoop.NodeType != XmlNodeType.Element)
continue;
if (xNodeLoop.Name == "EmbeddedImage")
{
EmbeddedImage ei = new EmbeddedImage(r, this, xNodeLoop);
_Items.Add(ei);
}
else
this.OwnerReport.rl.LogError(4, "Unknown Report element '" + xNodeLoop.Name + "' ignored.");
}
if (_Items.Count == 0)
OwnerReport.rl.LogError(8, "For EmbeddedImages at least one EmbeddedImage is required.");
else
_Items.TrimExcess();
}