窗口的主要属性和方法

控件

属性

事件

方法

案例

例1：DialogResult:指定标识符以指示对话框的返回值

DialogResult aa = MessageBox.Show("确认要退出系统吗？", "提示",                                                                                            MessageBoxButtons.OKCancel,MessageBoxIcon.Error);

　  if (aa == DialogResult.OK)

　　｛

　           　Application.Exit();

　　｝

例2：从数据库中绑定下拉框的值（如绑定年级信息）

                    private void Tishi()

　　        {

　　            string sql = "select GradeId, GradeName from dbo.Grade";

　　            DataTable dt = DBHelper.GetTable(sql);

　　　　              //往下拉框插入数据库之外的值

　　　　              DataRow row = dt.NewRow();

　　　                  row[0] = -1;

　　            row[1] = "全部";

　　　　              dt.Rows.InsertAt(row, 0);

　　            this.年级.DisplayMember = "GradeName";

　　            this.年级.ValueMember = "GradeId";

　　            this.年级.DataSource = dt;

　　　　      }

例3：清空

            foreach (object item in this.Controls)

            {

                if (item is GroupBox)

                {

                    GroupBox tb = (GroupBox)item;

                    foreach (object items in tb.Controls)

                    {

                        if (items is TextBox)

                        {

                            TextBox tbs = (TextBox)items;

                            tbs.Text = String.Empty;

                        }

                        if (items is ComboBox)

                        {

                            ComboBox tbs = (ComboBox)items;

                            tbs.SelectedIndex = 0;

                        }

                        if (items is DateTimePicker)

                        {

                            DateTimePicker tbs = (DateTimePicker)items;

                            tbs.Value = DateTime.Now;

                        }

                    }

                }

            }

例4：ListView控件绑定数据的两种自定义方法

             private void LvBind(string sb)

        {

（第一种）

            //SqlDataReader reader = DBHelper.Getreader(sb.ToString());

            //if (reader.HasRows)

            //{

            //    while (reader.Read())

            //    {

            //        ListViewItem lv = new ListViewItem();

            //        lv.Text = reader["StudentNo"].ToString();

            //        lv.SubItems.Add(reader["StudentName"].ToString());

            //        lv.SubItems.Add(reader["Gender"].ToString());

            //        lv.SubItems.Add(reader["GradeName"].ToString());

            //        listView1.Items.Add(lv);

            //    }

            //}

            //else

            //{

            //    MessageBox.Show("没有任何你需要查找的信息");

            //}

            //reader.Close();

            //DBHelper.CloseConnection();

（第二种）

            DataTable bt = DBHelper.GetTable(sb);

            for (int i = 0; i <bt.Rows.Count; i++)

            {

                ListViewItem lv = new ListViewItem();

                lv.Text = bt.Rows[i][0].ToString();

                lv.SubItems.Add(bt.Rows[i][1].ToString());

                lv.SubItems.Add(bt.Rows[i][2].ToString());

                lv.SubItems.Add(bt.Rows[i][3].ToString());

                listView1.Items.Add(lv);

            }

            this.dataGridView1.DataSource = bt;

        }

本文出自 “张志鹏” 博客，请务必保留此出处http://zhangzhipeng.blog.51cto.com/9115459/1571051

winform开发笔记