c#-控件-ComboBox实践_combox.displaymember system.data.row-优快云博客

本文介绍如何使用C#在Windows Forms应用中创建DataTable并将其绑定到ComboBox控件，通过comboBox1的SelectedIndexChanged事件获取用户选择。通过代码实例展示了DataTable的初始化、数据填充以及组件间的数据绑定过程。

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1.概要

DataTable ADt = new DataTable();
DataColumn ADC1 = new DataColumn("F_ID", typeof(int));
DataColumn ADC2 = new DataColumn("F_Name", typeof(string));
ADt.Columns.Add(ADC1);
ADt.Columns.Add(ADC2);
for (int i = 0; i < 5; i++) {
DataRow adr = ADt.NewRow();
adr[0] = i;
adr[1] = "Name" + i;
ADt.Rows.Add(adr);
}
comboBox1.DataSource = ADt;
comboBox1.DisplayMember = "F_Name";
comboBox1.ValueMember = "F_ID";

string str = comboBox1.Text + comboBox1.SelectedValue;
MessageBox.Show(str);

2.代码

using System;
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;

namespace WindowsFormsApp4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            createData();
        }
        private void createData2() {
            DataTable ADt = new DataTable();
            DataColumn ADC1 = new DataColumn("F_ID", typeof(int));
            DataColumn ADC2 = new DataColumn("F_Name", typeof(string));
            ADt.Columns.Add(ADC1);
            ADt.Columns.Add(ADC2);
            for (int i = 0; i < 5; i++)
            {
                DataRow adr = ADt.NewRow();
                adr[0] = i;
                adr[1] = "Name" + i;
                ADt.Rows.Add(adr);
            }
            comboBox1.DataSource = ADt;
            comboBox1.DisplayMember = "F_Name";
            comboBox1.ValueMember = "F_ID";
        }
        private void createData() {
            for (int i = 0; i < 5; i++) {
                ItemCom itemCom = new ItemCom();
                itemCom.Text = "neme" + i;
                itemCom.Value = i+"";
                comboBox1.Items.Add(itemCom);
            }
            comboBox1.DisplayMember = "Text";
            comboBox1.ValueMember = "Value";
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            //string str = comboBox1.Text +"-" +comboBox1.SelectedValue;
            string str = ((ItemCom)comboBox1.SelectedItem).Value;
            MessageBox.Show(str);
        }
    }
}

3.运行效果