public IDataModelDescriptor TryGetOrNull(Type Type)
{
IDataModelDescriptor e = null;
entities.TryGetValue(Type, out e);
return(e);
}
public IDataModelDescriptor TryGetOrNull(string Name)
{
IDataModelDescriptor e = null;
entities.TryGetValue(Name, out e);
return(e);
}
public IDataModelDescriptor Get(Type Type)
{
IDataModelDescriptor e = null;
if (entities.TryGetValue(Type, out e))
{
return(e);
}
else
{
throw new ArgumentException("No entity of Type: " + Type.Name + " exists in SchemaModel");
}
}
public IDataModelDescriptor Get(string Name)
{
IDataModelDescriptor e = null;
if (entities.TryGetValue(Name, out e))
{
return(e);
}
else
{
throw new ArgumentException("No entity named: " + Name + " exists in SchemaModel");
}
}
public void Register(IDataModelDescriptor entitySchemaModel)
{
bool exists = false;
if (!(exists = entities.ContainsKey2(entitySchemaModel.EntityType)))
{
lock (dlock)
{
if (!(exists = entities.ContainsKey2(entitySchemaModel.EntityType)))
{
entities.Add(entitySchemaModel.EntityType.Name, entitySchemaModel.EntityType, entitySchemaModel);
}
}
}
if (exists)
{
throw new Exception("Type " + entitySchemaModel.EntityType.Name + " has already been registerd");
}
}
/// <summary>
/// Enables processing of HTTP Web requests by a custom HttpHandler
/// that implements the <see cref="T:System.Web.IHttpHandler"/>
/// interface.
/// </summary>
/// <param name="context">An <see cref="T:System.Web.HttpContext"/>
/// object that provides references to the intrinsic server objects
/// (for example, Request, Response, Session, and Server) used to
/// service HTTP requests.</param>
public void ProcessRequest(HttpContext context)
{
if (controller == null)
{
return;
}
IDataModelDescriptor desc = controller.GetDataModelDescriptor(
new Guid(context.Request.QueryString["dataModel"]));
IDataModelField imageField =
desc.Fields[context.Request.QueryString["imageField"]];
IDatabaseSelectQuery query = controller.CreateQuery();
string[] keys = context.Request.QueryString["key"].Split(',');
string showThumb = context.Request.QueryString["showThumbnail"];
bool showThumbnail = showThumb != null;
query.AssignBaseTable(desc);
query.AddColumn(imageField, false);
for (int i = 0; i < desc.KeyFields.Count; i++)
{
query.AddCompareValue(
desc.KeyFields[i],
keys[i],
DatabaseOperator.Equal);
}
context.Response.CacheControl = "no-cache";
context.Response.ContentType = "image/jpeg";
context.Response.Expires = -1;
byte[] originalImage = (byte[])controller.ExecuteScalar(query);
if (showThumbnail)
{
int scalePixels;
if (!int.TryParse(showThumb, out scalePixels))
{
scalePixels = 100;
}
using (Stream stream = new MemoryStream(originalImage))
using (Image img = Image.FromStream(stream))
{
double multiplier;
if ((img.Width <= scalePixels) &&
(img.Height <= scalePixels))
{
context.Response.BinaryWrite(originalImage);
return;
}
else if (img.Height < img.Width)
{
multiplier = (double)img.Width / (double)scalePixels;
}
else
{
multiplier = (double)img.Height / (double)scalePixels;
}
using (Bitmap finalImg = new Bitmap(
img,
(int)(img.Width / multiplier),
(int)(img.Height / multiplier)))
using (Graphics g = Graphics.FromImage(finalImg))
{
g.InterpolationMode =
InterpolationMode.HighQualityBicubic;
finalImg.Save(
context.Response.OutputStream,
ImageFormat.Jpeg);
}
}
}
else
{
context.Response.BinaryWrite(originalImage);
}
}
