c# - 通过 linq 添加新行 Datagridview

Question

我正在尝试实用地向 dataGrid 添加新行。首先，代码检查该行是否已存在，如果不存在，则放置新行；否则它不会进入 DatagridView 中的行

我的代码的问题是它连续循环，在事件触发时添加相同的行。

这是我的代码：

 public static void addJobstoDespatchGrid(DataGridView jobDataGridView)
    {
        using (DBEntities db = new DBEntities())
        {
            var data = (from a in db.Active where a.Status == "Hold"
                                                 select a);


            foreach (var row in Data)
            {
                if (GridView.RowCount >= 0)
                {
                    foreach (DataGridViewRow r in GridView.Rows)
                    {

                        Int32 id = Convert.ToInt32(r.Cells[0].Value);

                        if (row.jobID !=id)
                        {
                            DataGridViewRow rw = new DataGridViewRow();
                            rw.CreateCells(GridView);
                            rw.Cells[0].Value = row.jobID;
                            rw.Cells[1].Value = row.JobType;
                            rw.Cells[2].Value = row.dateTime;
                            rw.Cells[3].Value = row.jobStatus;

                            GridView.Rows.Add(rw);

                        }
                    }
                }
                else
                {
                    DataGridViewRow rw = new DataGridViewRow();
                    rw.CreateCells(GridView);
                    rw.Cells[0].Value = row.jobID;
                    rw.Cells[1].Value = row.JobType;
                    rw.Cells[2].Value = row.dateTime;
                    rw.Cells[3].Value = row.jobStatus;


                   GridView.Rows.Add(rw);

                }
            }
        }
    }