I am getting an Error
"An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key."
I used this method in two places. In first place - work correctly, but in second I have error.
How decided this problem?
My method:
public static void UpdateMehod(ModelEntities context, ProcessedFilest processedFiles)
{
context.Set<ProcessedFiles>().Attach(processedFiles);
context.Entry(processedFiles).Property(p => p.ID).IsModified = true;
context.SaveChanges();
}
I create new method:
public static void UpdateProtocol(ModelEntities context, ProcessedFilesXml processedFilesXml) { var entry = context.Entry(processedFilesXml);
if (entry.State == EntityState.Detached)
{
var set = context.Set<ProcessedFilesXml>();
ProcessedFilesXml attachedEntity = set.Find(processedFilesXml.ProcessedFileXmlID);
if (attachedEntity != null)
{
var attachedEntry = context.Entry(attachedEntity);
attachedEntry.CurrentValues.SetValues(processedFilesXml);
}
else
{
entry.State = EntityState.Modified;
}
}
//context.Set<ProcessedFilesXml>().Attach(processedFilesXml);
//context.Entry(processedFilesXml).Property(p => p.Protocol).IsModified = true;
//context.SaveChanges();
}
But I don't know ho create savechanges?
If you load the entity from the context you cannot attach an entity with the same key agai.See this question or this
}