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Entity Framework - Saving a snapshot of a document in a SQL database


Entity Framework - Saving a snapshot of a document in a SQL database

By : Steven Ramsey
Date : November 22 2020, 10:31 AM
this one helps. Short answer
Assuming you are using SQL Server, I would recommend creating some XML-serializable DTOs for that job and storing XML in a dedicated column, using the XML datatype.
code :
public string InvoiceXml { get; set; }

public InvoiceSnapshot Invoice
{
    get 
    { 
        return this.InvoiceXml != null 
            ? InvoiceSnapshot.Parse(this.InvoiceXml)
            : null; 
    }
    set { this.InvoiceXml = value != null ? value.ToXml() : null; }
}
public class InvoiceEntityConfig : EntityTypeConfiguration<InvoiceEntity>
{
    public InvoiceEntityConfig()
    {
        this.Property(c => c.InvoiceXml).HasColumnType("xml");
        this.Ignore(c => c.Invoice);
    }
}


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Why is this Entity Framework code not saving to the database?

Why is this Entity Framework code not saving to the database?


By : Robert Casey
Date : March 29 2020, 07:55 AM
Any of those help I was having a similar issue, and the problem was solved by making sure the child tables have the Primary Key set.
Even though the child tables have an FK to the parent table, you still need to set these fields as the PK, otherwise EF does not know how to execute the INSERT on the child tables.
Modified data is not saving to database in entity framework database first

Modified data is not saving to database in entity framework database first


By : Koorosh Irany
Date : March 29 2020, 07:55 AM
I hope this helps . If method GetUser uses different context, then data will not be updated.
Try this:
code :
User user = db.Users.FirstOrDefault(x=>x.UserName == username);
               // string hash = FormsAuthentication.HashPasswordForStoringInConfigFile(newPassword.Trim(), "md5");
                string PasswordSalt = CreateSalt();
                user.PasswordSalt = PasswordSalt;
                user.Password = CreatePasswordHash(newPassword, PasswordSalt);
                db.SaveChanges();
Wcf service saving changes to database using entity framework

Wcf service saving changes to database using entity framework


By : user3216416
Date : March 29 2020, 07:55 AM
may help you . Looks like you have 2 versions of Employee:
one in 'iPos.Interfaces.Employee'
Entity Framework 6 db.savechanges isn't saving changes to database

Entity Framework 6 db.savechanges isn't saving changes to database


By : rajan
Date : March 29 2020, 07:55 AM
Hope that helps The instance of spell that you get from the database is detached from the DbContext.
code :
public IHttpActionResult Post([FromBody]Spell spell)
if (recordToUpdate != null)
{
    // Not needed: recordToUpdate = spell;
    db.Entry(spell).State = EntityState.Modified;
    db.SaveChanges();
    return Ok("Spell " + spell.id + " (" + spell.name + ") Updated Successfully!");
}
Entity Framework isn't saving data to database in WPF

Entity Framework isn't saving data to database in WPF


By : zig
Date : March 29 2020, 07:55 AM
wish of those help You are probably using |DataDirectory| in your connection string. If debugging in Visual Studio, the database you are using is in the bin/debug folder. Unfortunately if you look at the db through Server Explorer it has a different connection string so you don't see the changes.
Also if the database property "Copy to Output directory" is set to Copy Always then every time you debug you will overwrite your db and you won't see the data you added. You can check if this is happening by using a new db context in the same debug session where you add the records. If the new context can get the records from the db then you know they must be being written (as well as the other checks listed in the comments)
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