C#winform学习6(部门部分)

1.部门列表显示listview

首先需要在listview中设定相关属性

打开这个

 代码：

private void DeptForm_Load(object sender, EventArgs e)
        {
            //初始化列表
            setListView();
        }
        /// <summary>
        /// 初始化部门列表
        /// </summary>
        private void setListView()
        {
            MySqlConnection mySqlConnection = null;
            try
            {
                mySqlConnection = new MySqlConnection("server=127.0.0.1;port=3306;user=root;password=123456;database=course");
                mySqlConnection.Open();
                string sql = string.Format("select * from deptInfo");
                MySqlCommand mySqlCommand = new MySqlCommand(sql, mySqlConnection);
                MySqlDataReader dataReader = mySqlCommand.ExecuteReader();
                while (dataReader.Read())
                {
                    string deptId = dataReader["deptId"].ToString();
                    string deptName = dataReader["deptName"].ToString();
                    ListViewItem item = new ListViewItem(deptId);
                    item.SubItems.Add(deptName);
                    listView1.Items.Add(item);
                }
                dataReader.Close();
                
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                //throw;
            }
            finally
            {
                mySqlConnection.Close();
            }
        }

 2.在1基础上添加条件查询

private void DeptForm_Load(object sender, EventArgs e)
        {
            //初始化列表
            setListView();
        }
        /// <summary>
        /// 初始化部门列表
        /// </summary>
        private void setListView()
        {
            
            MySqlConnection mySqlConnection = null;
            try
            {
                mySqlConnection = new MySqlConnection("server=127.0.0.1;port=3306;user=root;password=123456;database=course");
                mySqlConnection.Open();
                string sql = string.Format("select * from deptInfo");

                //添加条件查询
                if(deptNameText.Text.Trim().Length != 0)
                {
                    sql += string.Format(" where deptName like '%{0}%'", deptNameText.Text.Trim());
                }

                MySqlCommand mySqlCommand = new MySqlCommand(sql, mySqlConnection);
                MySqlDataReader dataReader = mySqlCommand.ExecuteReader();
                while (dataReader.Read())
                {
                    string deptId = dataReader["deptId"].ToString();
                    string deptName = dataReader["deptName"].ToString();
                    ListViewItem item = new ListViewItem(deptId);
                    item.SubItems.Add(deptName);
                    listView1.Items.Add(item);
                }
                dataReader.Close();
                
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                //throw;
            }
            finally
            {
                mySqlConnection.Close();
            }
        }
        /// <summary>
        /// 部门查询功能
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            //需要先清空列表中的内容,不然会直接添加到列表末尾
            listView1.Items.Clear();
            setListView();
        }