DataGridView自动更新数据

未处理 System.InvalidOperationException
  Message="操作无效，原因是它导致对 SetCurrentCellAddressCore 函数的可重入调用。"
  
//当点击按钮时调用 GetScore()方法,对 DataGridView 数据进行填充
 private void GetScore()
        {
            Scores score = new Scores();            int iCourseId = Convert.ToInt32(lstCourse.SelectedItems[0].SubItems[1].Text);            int iClassId = Convert.ToInt32(lstClass.SelectedItems[0].SubItems[1].Text);            DataSet dsScore = score.SelectScore(-1, iCourseId, iClassId);
            this.dataGridView1.DataSource = dsScore;
            this.dataGridView1.DataMember = dsScore.Tables[0].TableName;
        }//单击单元格时
        private void dataGridView1_CurrentCellChanged(object sender, EventArgs e)
        {
            if (this.dataGridView1.SelectedCells.Count == 1)//判断如果有选中的单元格
            {
                
                //得到选择的行
                int selectRowIndex = -1;
                try
                {
                    selectRowIndex = this.dataGridView1.SelectedCells[0].RowIndex;
                }
                catch
                {
                }
                string score = this.dataGridView1.Rows[selectRowIndex].Cells[5].Value.ToString();
                string ScoreId = this.dataGridView1.Rows[selectRowIndex].Cells[4].Value.ToString();                int iCourseId = Convert.ToInt32(lstCourse.SelectedItems[0].SubItems[1].Text);
                //
                if (score == "" && ScoreId == "")//如果分数列为空--插入
                {
                    if (selectRowIndex != -1)
                    {
                        int stuId = -1;
                        try
                        {
                            stuId = Convert.ToInt32(this.dataGridView1.Rows[selectRowIndex].Cells[0].Value);                        }
                        catch
                        {
                        }                        if (stuId == -1)
                        {
                            return;
                        }                        Scores s = new Scores();
                        s.InsertScore(iCourseId, stuId, 0);//对分数表进行插入
                //如果随意的点几下,那么会插入很多相同的值 但是却无法立即显示在 DataGridView 里
                        GetScore();
                //这里反回去重新填充新的数据就引发异常,但是自己点按钮却无异常发生....
                    }
                }
                else
                {
                    if (selectRowIndex != -1)
                    {
                        int scoreId = Convert.ToInt32(this.dataGridView1.Rows[selectRowIndex].Cells[4].Value);                        string obj = this.dataGridView1.Rows[selectRowIndex].Cells[5].Value.ToString();                        if (obj == "")
                        {
                            obj = "0";
                        }                        float f = Convert.ToSingle(obj);
                        int stuId = Convert.ToInt32(this.dataGridView1.Rows[selectRowIndex].Cells[0].Value);
                        Scores s = new Scores();
                        s.UpdateScore(scoreId, f);//更新分数                    }
                }
            }
        }大致表格如下;
列1    列2    列3    ScoreId    Score
1      2      3     null        null因为在库里 ScoreId    为标识列,所以只需要对分数进行插入.....但是在插入新的后 移开单元格 无法载入新插入的值,但是库里却已经有值了...