LINQ中的DuplicateKeyException,但我已设置自动增量和自动同步

时间:2011-06-24 14:33:15

标签: c# .net linq

我的C#代码中出现DuplicateKeyException错误。

我在我的dbml中设置了Auto Generated = true和Auto-Sync = OnInsert。我甚至没有在任何手动编写的代码中触摸PK字段(如下所示[我的主键字段实际上称为PK])。

using (DeviceExerciseDataDataContext context = new DeviceExerciseDataDataContext())
                {
 foreach(Data tgudData in data.Data)
                {
                    tgd = new tableData();
                    tgd.FK = key;
                    tgd.Time = tgudData.TimeStamp;
                    tgd.Calories = Convert.ToInt32(tgudData.Calories);
                    tgd.HeartRate = tgudData.AvgHr;
                    tgd.BenchAngle = tgudData.Angle;
                    tgd.WorkoutTarget = 0;
                    tgd.Reps = tgudData.Reps;
                    context.tableDatas.InsertOnSubmit(tgd);
                }
                context.SubmitChanges();
}

这是设计器中列的代码(列名为PK和FK)

[global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_PK", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL", IsPrimaryKey=true, IsDbGenerated=true)]
        public int PK
        {
            get
            {
                return this._PK;
            }
            set
            {
                if ((this._PK != value))
                {
                    this.OnPKChanging(value);
                    this.SendPropertyChanging();
                    this._PK = value;
                    this.SendPropertyChanged("PK");
                    this.OnPKChanged();
                }
            }
        }

        [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_FK", DbType="Int")]
        public System.Nullable<int> FK
        {
            get
            {
                return this._FK;
            }
            set
            {
                if ((this._FK != value))
                {
                    this.OnFKChanging(value);
                    this.SendPropertyChanging();
                    this._FK = value;
                    this.SendPropertyChanged("FK");
                    this.OnFKChanged();
                }
            }
        }

1 个答案:

答案 0 :(得分:2)

查看自动生成的代码,您可以尝试将设计器中的服务器数据类型更改为 Int NOT NULL IDENTITY 。我不怀疑这会解决它,但你永远不知道。