void OnReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
var bitbucketProp = e.Entity.GetType().GetProperty("DynamicProperties");
IDictionary <string, object> bitbucket = null;
if (bitbucketProp != null)
{
bitbucket = bitbucketProp.GetValue(e.Entity, null) as IDictionary <string, object>;
}
if (bitbucket != null)
{
var properties = e.Entity.GetType().GetProperties();
var q = from p in e.Data.Element(AtomNamespace + "content")
.Element(AstoriaMetadataNamespace + "properties")
.Elements()
where properties.All(pp => pp.Name != p.Name.LocalName)
select new {
Name = p.Name.LocalName,
IsNull = string.Equals("true", p.Attribute(AstoriaMetadataNamespace + "null") == null ? null : p.Attribute(AstoriaMetadataNamespace + "null").Value, StringComparison.OrdinalIgnoreCase),
TypeName = p.Attribute(AstoriaMetadataNamespace + "type") == null ? null : p.Attribute(AstoriaMetadataNamespace + "type").Value,
p.Value
};
foreach (var dp in q)
{
bitbucket[dp.Name] = GetTypedEdmValue(dp.TypeName, dp.Value, dp.IsNull);
}
}
}
// This manually parses the XML that comes back.
// This function uses code from this blog entry:
// http://blogs.msdn.com/b/avkashchauhan/archive/2011/03/28/reading-and-saving-table-storage-entities-without-knowing-the-schema-or-updating-tablestorageentity-schema-at-runtime.aspx
public static void OnReadingEntity(object sender, ReadingWritingEntityEventArgs args)
{
GenericEntity entity = args.Entity as GenericEntity;
if (entity == null)
{
return;
}
// read each property, type and value in the payload
var properties = args.Entity.GetType().GetProperties();
var q = from p in args.Data.Element(AtomNamespace + "content")
.Element(MetadataNamespace + "properties")
.Elements()
where properties.All(pp => pp.Name != p.Name.LocalName)
select new
{
Name = p.Name.LocalName,
IsNull = string.Equals("true", p.Attribute(MetadataNamespace + "null") == null ? null : p.Attribute(MetadataNamespace + "null").Value, StringComparison.OrdinalIgnoreCase),
TypeName = p.Attribute(MetadataNamespace + "type") == null ? null : p.Attribute(MetadataNamespace + "type").Value,
p.Value
};
foreach (var dp in q)
{
string value = dp.Value;
if (!string.IsNullOrWhiteSpace(value))
{
value = string.Empty;
}
entity.properties[dp.Name] = dp.Value;
}
}
private void ctx_WritingEntity(object sender, ReadingWritingEntityEventArgs args)
{
GenericWriterEntity entity = args.Entity as GenericWriterEntity;
if (entity == null)
{
return;
}
XElement properties = args.Data.Descendants(GenericTableReader.MetadataNamespace + "properties").First();
for (int iColumnn = 0; iColumnn < _edmTypeNames.Length; iColumnn++)
{
string edmTypeName = _edmTypeNames[iColumnn];
if (edmTypeName == null)
{
continue;
}
string value = entity._source.Values[iColumnn];
string columnName = _columnNames[iColumnn];
// framework will handle row + partition keys.
XElement e = new XElement(GenericTableReader.DataNamespace + columnName, value);
e.Add(new XAttribute(GenericTableReader.MetadataNamespace + "type", edmTypeName));
properties.Add(e);
}
}
static void context_ReadingEntity(object sender, ReadingWritingEntityEventArgs args)
{
TableEntity entity = args.Entity as TableEntity;
if (entity == null)
{
return;
}
// read each property, type and value in the payload
var properties = args.Entity.GetType().GetProperties();
var q = from p in args.Data.Element(AtomNamespace + "content")
.Element(AstoriaMetadataNamespace + "properties")
.Elements()
where properties.All(pp => pp.Name != p.Name.LocalName)
select new
{
Name = p.Name.LocalName,
p.Value
};
foreach (var dp in q)
{
entity[dp.Name] = dp.Value;
}
}
public virtual void ReadEntity(TableServiceContext context, ReadingWritingEntityEventArgs args)
{
var ns = XNamespace.Get(DATASERVICESNS);
var survey = args.Entity as IUDFModel;
if (survey != null && survey.UserDefinedFields != null && survey.UserDefinedFields.Count > 0)
{
foreach (var udfItem in survey.UserDefinedFields)
{
var udfField = args.Data.Descendants(ns + udfItem.Name).FirstOrDefault();
if (udfField != null)
{
try
{
udfItem.SetUDFValue(udfField.Value);
}
catch (Exception ex)
{
TraceHelper.TraceWarning("Cannot map value '{0}' to field '{1}': {2}", udfField.Value, udfItem.Name, ex.Message);
udfItem.ClearValue();
}
}
else
{
udfItem.ClearValue();
}
}
}
}
/// <summary>
/// Called when the data services data context has finished trying to deserialize and entity
/// from table storage.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Data.Services.Client.ReadingWritingEntityEventArgs"/> instance containing the event data.</param>
private static void OnReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
GenericEntity entity = e.Entity as GenericEntity;
if (null == entity)
{
return;
}
entity.TableName = e.Data.Element(AtomNS + "link").Attribute("title").Value;
var q = from p in e.Data.Element(AtomNS + "content").Element(mNS + "properties").Elements()
select new
{
Name = p.Name.LocalName,
IsNull = string.Equals("true", p.Attribute(mNS + "null") == null ? null : p.Attribute(mNS + "null").Value, StringComparison.OrdinalIgnoreCase),
TypeName = p.Attribute(mNS + "type") == null ? "Edm.String" : p.Attribute(mNS + "type").Value,
p.Value
};
foreach (var dp in q)
{
entity[dp.Name] = dp.TypeName;
}
}
void DSCatalogClient_ReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
if (MergeOption != MergeOption.NoTracking)
{
ChangeTracker.Attach(e.Entity);
}
}
void _context_WritingEntity(object sender, ReadingWritingEntityEventArgs e)
{
// e.Data gives you the XElement for the Serialization of the Entity
//Using XLinq , you can add/Remove properties to the element Payload
XName xnEntityProperties = XName.Get("properties", e.Data.GetNamespaceOfPrefix("m").NamespaceName);
XElement xePayload = null;
foreach (PropertyInfo property in e.Entity.GetType().GetProperties())
{
//object[] doNotSerializeAttributes = property.GetCustomAttributes(typeof(DoNotSerializeAttribute), false);
//if (doNotSerializeAttributes.Length > 0)
//{
// if (xePayload == null)
// {
// xePayload = e.Data.Descendants().Where<XElement>(xe => xe.Name == xnEntityProperties).First<XElement>();
// }
// //The XName of the property we are going to remove from the payload
// XName xnProperty = XName.Get(property.Name, e.Data.GetNamespaceOfPrefix("d").NamespaceName);
// //Get the Property of the entity you don't want sent to the server
// foreach (XElement xeRemoveThisProperty in xePayload.Descendants(xnProperty).ToList())
// {
// //Remove this property from the Payload sent to the server
// xeRemoveThisProperty.Remove();
// }
//}
}
}
private void OnReadingEntity(object sender, ReadingWritingEntityEventArgs args)
{
IMediaContextContainer mediaContextContainer = args.Entity as IMediaContextContainer;
if (mediaContextContainer != null)
{
mediaContextContainer.SetMediaContext(this._mediaContext);
}
}
private void OnReadingEntity(object sender, ReadingWritingEntityEventArgs args)
{
ICloudMediaContextInit init = args.Entity as ICloudMediaContextInit;
if (init != null)
{
init.InitCloudMediaContext(this._cloudMediaContext);
}
}
private void OnReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
var package = (DataServicePackage)e.Entity;
// REVIEW: This is the only way (I know) to download the package on demand
// GetReadStreamUri cannot be evaluated inside of OnReadingEntity. Lazily evaluate it inside DownloadPackage
package.Context = Context;
package.Downloader = _packageDownloader;
}
private void OnReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
var package = (DataServicePackage)e.Entity;
var downloadUri = e.Data.Element(e.Data.Name.Namespace.GetName("content"))
.Attribute(System.Xml.Linq.XName.Get("src")).Value;
package.DownloadUrl = new Uri(downloadUri);
package.Downloader = _packageDownloader;
}
public override void ReadEntity(CloudTable context, ReadingWritingEntityEventArgs args)
{
var surveyRow = args.Entity as SurveyRow;
if (surveyRow == null)
{
throw new InvalidOperationException("Strategy should be used to read/write a SurveyRow model.");
}
surveyRow.UserDefinedFields = this.UDFDictionary.InstanceFieldsFor <SurveyRow>(surveyRow.PartitionKey);
base.ReadEntity(context, args);
}
public virtual void WriteEntity(TableServiceContext context, ReadingWritingEntityEventArgs args)
{
var ns = XNamespace.Get(DATASERVICESNS);
var nsmd = XNamespace.Get(DATASERVICESMETADATANS);
var survey = args.Entity as SurveyRow;
if (survey != null && survey.UserDefinedFields != null && survey.UserDefinedFields.Count > 0)
{
var properties = args.Data.Descendants(nsmd + "properties").First();
foreach (var udfItem in survey.UserDefinedFields)
{
var udfField = new XElement(ns + udfItem.Name, udfItem.Value);
udfField.Add(new XAttribute(nsmd + "type", udfItem.GetEdmType()));
properties.Add(udfField);
}
}
}
static void context_WritingEntity(object sender, ReadingWritingEntityEventArgs e)
{
TableEntity entity = e.Entity as TableEntity;
if (entity == null)
{
return;
}
XElement properties = e.Data.Element(AtomNamespace + "content").Element(AstoriaMetadataNamespace + "properties");
properties.Element(AstoriaDataNamespace + "Values").Remove();
foreach (KeyValuePair <string, string> pair in entity.GetProperties())
{
properties.Add(new XElement(AstoriaDataNamespace + pair.Key, pair.Value));
}
}
void HandleReadEntity(object sender, ReadingWritingEntityEventArgs e)
{
if (!(e.Entity is WadTableEntity))
{
return;
}
var properties = e.Data.Descendants(XName.Get("properties", "http://schemas.microsoft.com/ado/2007/08/dataservices/metadata")).FirstOrDefault();
if (properties == null)
{
return;
}
var entity = e.Entity as WadTableEntity;
foreach (var property in properties.Elements())
{
entity.Properties.Add(property.Name.LocalName, property.Value);
}
}
// Method that handles the WritingEntity event.
void PhotoDataContainer_WritingEntity(object sender,
ReadingWritingEntityEventArgs e)
{
// Define an XName for the properties element in the response payload.
XName properties = XName.Get("properties",
e.Data.GetNamespaceOfPrefix("m").NamespaceName);
// Get the payload element that contains the properties of the entity to be sent.
XElement payload = e.Data.DescendantsAndSelf()
.Where <XElement>(xe => xe.Name == properties).First <XElement>();
// Define an XName for the property to remove from the payload.
XName propertyName = XName.Get("StreamUri",
e.Data.GetNamespaceOfPrefix("d").NamespaceName);
//Get the element of the property to remove.
XElement removeProperty = payload.Descendants()
.Where <XElement>(xe => xe.Name == propertyName).First <XElement>();
// Remove the property from the payload.
removeProperty.Remove();
}
private void TableContext_ReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
XName xnProps = XName.Get("properties", e.Data.GetNamespaceOfPrefix("m").NamespaceName);
XElement xeProps = e.Data.Descendants().Where(xe => xe.Name == xnProps).First();
var props = new List <Property>();
Guid ID = Guid.Empty;
foreach (XElement prop in xeProps.Nodes())
{
if (prop.Name.LocalName == "PartitionKey")
{
((TableEntity)e.Entity).PartitionKey = prop.Value;
}
else if (prop.Name.LocalName == "RowKey")
{
((TableEntity)e.Entity).RowKey = prop.Value;
}
else if (prop.Name.LocalName.ToLower() == "EntityId".ToLower())
{
ID = new Guid(prop.Value);
}
else if (prop.Name.LocalName == "Timestamp")
{
((TableEntity)e.Entity).Timestamp = DateTime.Parse(prop.Value);
}
else
{
props.Add(new Property(prop.Name.LocalName, prop.Value));
}
}
var entity = new Entity(ID);
foreach (Property prop in props)
{
entity.AddProperty(prop.Name, prop.Value);
}
((TableEntity)e.Entity).SetEntity(entity);
}
private void GenericTableContext_ReadingEntity(object sender, ReadingWritingEntityEventArgs e)
{
var entity = e.Entity as GenericEntity;
if (entity != null)
{
e.Data
.Element(AtomNamespace + "content")
.Element(AstoriaMetadataNamespace + "properties")
.Elements()
.Select(p =>
new
{
Name = p.Name.LocalName,
IsNull = string.Equals("true", p.Attribute(AstoriaMetadataNamespace + "null") == null ? null : p.Attribute(AstoriaMetadataNamespace + "null").Value, StringComparison.OrdinalIgnoreCase),
TypeName = p.Attribute(AstoriaMetadataNamespace + "type") == null ? null : p.Attribute(AstoriaMetadataNamespace + "type").Value,
p.Value
})
.Select(dp => new Column(dp.Name, dp.TypeName, dp.Value.ToString()))
.ToList()
.ForEach(column => entity[column.ColumnName] = column);
}
}
private void OnWritingEntity(object sender, ReadingWritingEntityEventArgs e)
{
XName xnProps = XName.Get("properties", e.Data.GetNamespaceOfPrefix("m").NamespaceName);
XElement xeProps = e.Data.Descendants().Where(xe => xe.Name == xnProps).First();
foreach (TableEntity.NameTypeValueTuple tuple in ((TableEntity)e.Entity).GetProperties())
{
if (tuple.Value is DateTime)
{
tuple.Value = ConvertToUtc((DateTime)tuple.Value);
}
if (tuple.Type != null)
{
xeProps.Add(new XElement(e.Data.GetNamespaceOfPrefix("d") + tuple.Name,
new XAttribute(e.Data.GetNamespaceOfPrefix("m") + "type", tuple.Type),
tuple.Value));
}
else
{
xeProps.Add(new XElement(e.Data.GetNamespaceOfPrefix("d") + tuple.Name, tuple.Value));
}
}
}
