Question

我正在尝试在表中插入一行，但这只是在更新表。如何使用Entity Framework在表格中插入新行？

public partial class Transformer_GSM
{
    public int id { get; set; }
    public double KW { get; set; }
}

表格列

[id] [int] IDENTITY(1,1) PRIMARY KEY,
[KW] [float] NOT NULL

表名：Transformer_GSM

在上下文中-

 public DbSet<Transformer_GSM> Transformer_GSM { get; set; }

代码：

public IHttpActionResult GSM(double KW)
{
        try
        {
            using (smartpondEntities DB = new smartpondEntities())
            {
                DATA.Transformer_GSM  t = new Transformer_GSM();
                t.KW = KW;
                DB.Transformer_GSM.Add(t);
                DB.SaveChanges();
            }

            var response = new
            {
                Success = true,
                Message = "Transformer data saved",
            };

            return Ok(response);
}

Answer 1

我的猜测是，由于PK是一个标识列，您需要告诉EF，否则它将认为您正在更新ID = 0的记录。

public partial class Transformer_GSM
{
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int id { get; set; }
    public double KW { get; set; }
}

如何使用实体框架将记录插入SQL Server

1 个答案: