C# WinForm 实现增删改查等功能(Access版) 系列之四

C# WinForm 实现增删改查等功能(Access版) 系列之四

删除一条记录模块设计与实现
/// <summary>
        /// 删除数据库中的一记录
        /// </summary>
        /// <returns></returns>
        public bool deletDataGridViewOneLine(object sender, EventArgs e)
        {
            bool result = false;
            Int32 selectedRowCount = dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected);   //单选模式
            int selectedRow = dataGridView1.SelectedRows[0].Index;    //获得选中的某行
            string MName =  dataGridView1.Rows[selectedRow].Cells[0].Value.ToString().Trim();
           // MessageBox.Show(MName.ToString());
            DialogResult dr = MessageBox.Show("确定要删除这条记录吗?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (dr == DialogResult.Yes)
            {
                if (MName != null && MName != "")
                {
                    OleDbConnection conn = GetConnection();
                    string sqlText = "delete from MResume where 姓名=@MName";
                    OleDbCommand cmd = new OleDbCommand(sqlText, conn);
                    cmd.Parameters.AddWithValue("@MName", MName);
                    try
                    {
                        conn.Open();
                        int i = cmd.ExecuteNonQuery();
                        result = true;
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("发生异常：" + ex.ToString(), "提示");
                        result = false;
                    }
                    finally
                    {
                        conn.Close();
                    }
                }
            }
            return result;
        }
//右键选中行
//本方法来自CSDN博客，转载请标明出处：http://blog.csdn.net/yshjshxxn/archive/2009/06/26/4300927.aspx
        private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
        {
              //判断如果点击的是鼠标右键  
            if (e.Button == MouseButtons.Right)  
            {  
                //判断鼠标点击在数据行上  
                if (e.RowIndex >= 0)  
                {
                    dataGridView1.ClearSelection();
                    dataGridView1.Rows[e.RowIndex].Selected = true;
                    dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];  
                }  
            }
        }