Can't get Azure TableEntity etag on CreateQuery -


i'm doing query entities table, changing them, doing replace operation. replace operation fails because etag property on etag null. checked, , etag null when entity createquery() call, populated when retrieve(). there way etag manually?

ienumerable<myentity> query = e in servicecontext.createquery<myentity>(tablename)                                         e.id == queryid                                         select e;  myentity entity = query.firstordefault();  // update myentity object  var replaceoperation = tableoperation.replace(entity); mycloudtableclient.gettablereference(tablename).execute(replaceoperation);  // exception thrown here etag value null

the problem stems fact mixing 2 different components.

servicecontext.createquery<myentity>(tablename)

is using system.data.services.client namespace. in model entity not track etag, context you. 

mycloudtableclient.gettablereference(tablename).execute(replaceoperation)

is using table.dataservices namespace. in model there no central context , each entity tracks own state exposing etag property. enforced via itableentity interface. entity using query not intended used newer libraries, , root of problem.

switch using 

mycloudtableclient.gettablereference(tablename).createquery<myentity>()

to create query , issues should go away.


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