winform:对dataGridView绑定的泛型List 的简单CRUD

2021-10-27 07:53:55

创建对象类，为所有成员封装字段，然后重载该类；
根据已有的对象类（类型参数）创建一个长度可以变化的List数组，并绑定数据源；
设置dataGridView的column属性：对应四个对象类创建相应列并用Name属性进行绑定；
button_onclick事件点击处理；

public partial class Form1 : Form

    {
        public Form1()
        {
            InitializeComponent();
        }


        List<Person> L1 = new List<Person>();
        private List<Person> L11 = new List<Person>();

        public List<Person> L111
        {
            get { return L11; }
            set { L11 = value; }
        }

         //internal

        private void Form1_Load(object sender, EventArgs e)
        {

            //学号，姓名，年龄，电话
            L111.Add(new Person("1", "王尼玛", 4, "466666666666"));
            L111.Add(new Person("2", "温尼玛", 5, "4444444"));
            L111.Add(new Person("3", "诏尼玛", 4, "4444444444"));
            L111.Add(new Person("4", "伦尼玛", 4, "4555555"));
            //this.dataGridView1.DataSource = L1;
            LoadData(L111);

        }

        public void LoadData(List<Person> L1)
        {
            this.dataGridView1.DataSource = new BindingList<Person>(L1);

        }
        //Add
        private void button2_Click(object sender, EventArgs e)
        {

            Add a1 = new Add(this);
            a1.Show();
        }

        //删除
        private void button4_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count <= 0)
            {
                return;
            }
            int ind = this.dataGridView1.CurrentRow.Index;
            L111.RemoveAt(ind);
            LoadData(L111);
        }
        //退出
        private void button6_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        //修改
        private void button3_Click(object sender, EventArgs e)
        {
            //Edit e1 = new Edit(this);
            //e1.Show();
            Person per = this.dataGridView1.CurrentRow.DataBoundItem as Person;
            Add ad = new Add(this, per);
            ad.ShowDialog();
            ;

        }
        //刷新
        private void button5_Click(object sender, EventArgs e)
        {
            LoadData(L111);
        }

        //查询
        private void button1_Click(object sender, EventArgs e)
        {

            List<Person> L2 = new List<Person>();
            //学号，姓名，年龄，电话
            foreach (Person item in L11)
            {
                if(item.Name.Contains(textBox1.Text))
                {
                    L2.Add(item);
                }
            }
            LoadData(L2);

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

    }

public class Person

    {
        public Person() { }
        public Person(string no, string name, int age, string phone) {
            this.No = no;
            this.Name = name;
            this.Age = age;
            this.Phone = phone;

        }
        //学号
        private string no;

        public string No
        {
            get { return no; }
            set { no = value; }
        }
        //    姓名
        private string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        //    年龄
        private int age;

        public int Age
        {
            get { return age; }
            set { age = value; }
        }
        //    电话
        private string phone;

        public string Phone
        {
            get { return phone; }
            set { phone = value; }
        }
    }

public partial class Add : Form
    {
        public Add()
        {
            InitializeComponent();

        }
        //Add
        Form1 f;
        public Add(Form1 f)
        {
            InitializeComponent();
            this.f = f;
            button1.Text = "Add";
        }

        //学号，姓名，年龄，电话

        int index;
        //Edit
        public Add(Form1 f, Person per)
        {
            InitializeComponent();
            this.f = f;
            textBox1.Text = per.No;
            textBox2.Text = per.Name;
            textBox3.Text = per.Age.ToString();
            textBox4.Text = per.Phone;
            button1.Text = "Edit";
            index = f.dataGridView1.CurrentRow.Index;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //非空验证
            if (textBox1.Text == string.Empty || textBox2.Text == string.Empty || textBox3.Text == string.Empty || textBox4.Text == string.Empty)
            {
                MessageBox.Show("亲，记得输入数据哦");

            }
            else
            {
                //验证学号是否重复
                foreach (Person item in f.L111)
                {
                    if (item.No == textBox1.Text)
                    {

                        if (button1.Text == "Edit" && item.No != textBox1.Tag.ToString().Trim() || button1.Text == "Add")
                        {
                            MessageBox.Show("学号已存在！");
                            return;
                        }
                    }
                }

                //修改数据源并重新绑定到DataGridView
                Person p1 = new Person(textBox1.Text.Trim(), textBox2.Text.Trim(), int.Parse(textBox3.Text.Trim()), textBox4.Text.Trim());

                if (button1.Text == "Add")
                {
                    f.L111.Add(p1);
                }
                else
                {
                    f.L111[index] = p1;
                    textBox1.Tag = p1.No;
                }
                f.LoadData(f.L111);



                //f.LoadData(L11);

            }
        }

        private void textBox4_TextChanged(object sender, EventArgs e)
        {

        }

        private void Add_Load(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

}

对应的界面：

还有就是新增和修改调用的界面的都是Add。所以会看到在Add开头那里有几个重载，然后会根据不同的 button1.Text执行相对应的操作。

还有一种是用winform 对dictionary进行操作。

dataGridView数据绑定是this.dataGridView.DataSource = new BindingList<T>();

还有定义一个数组去储存某一列的值，比如下面这两句：

string content = File.ReadAllText(Application.StartupPath + "//User.txt");

string[] values = Regex.Split(content, "\r\n");

其他列可以用随机数随便搞定，其他的都差不多。

最后感谢一下我那个外星人同学，版权归他所有~

码农公寓

相关文章