c#如何在combobox内选择一个数, 然后再text内显示另一个数

Question

现在combobox里面有选项 a,b,c

当我选择a的时候, textbox1 将会显示1

当我选择b的时候, textbox1 将会显示2

当我选择c的时候, textbox1 将会显示3

想请问这样我应该如何去coding

Answer 1

帮助到你可以点击右上角吗，谢谢~~如果需要工程文件可以发站内短信给我~

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Dictionary<string, string> data = new Dictionary<string, string> { { "a", "1" }, { "b", "2" }, { "c", "3" } };
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            textBox1.Text = data[comboBox1.Text];
        }
    }
}

数据绑定版本，可以直接从数据库读取，不用做键值对隐射

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            textBox1.Text = comboBox1.SelectedValue.ToString();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            var data = new[] { new { text = "a", value = "1" }, new { text = "b", value = "2" }, new { text = "c", value = "3" } };//可以改为读数据库
            comboBox1.DisplayMember = "text";
            comboBox1.ValueMember = "value";
            comboBox1.DataSource = data;
        }