c# 数据库数据与DataGridView表控件的绑定

public Form1()
{
   InitializeComponent();

   //连接数据库
   string str = "Data Source=IP;Initial Catalog=数据库名称;Persist Security Info=True;User ID=**; Password=";
   ConnectDatebase(str); 
}

void ConnectDatebase(string sql)
{
   SqlConnection connection = new SqlConnection();
   connection.ConnectionString = sql;
   connection.Open();

   SqlDataAdapter adapter = new SqlDataAdapter("select *from steelname", connection);
   DataSet dsMain = new DataSet();
   adapter.Fill(dsMain, "steelname");
   this.dataGridView1.DataSource = dsMain;
   this.dataGridView1.DataMember = "steelname";
}

对于数据库的更新操作

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.Common;

namespace DateManagerTools
{
    public partial class Form1 : Form
    {
        private DataSet dsMain;
        private SqlDataAdapter adapter;
        public Form1()
        {
            InitializeComponent();
        }

        private SqlConnection getConnection()
        {
            SqlConnection connection = new SqlConnection();
            connection.ConnectionString = "Data Source=IP;Initial Catalog=数据库名称;Persist Security Info=True;User ID=**; Password=";
            return connection;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            InitAdapter();
            getData();
            BindingControl();
        }

        /// <summary>
        /// 初始化adapter变量
        /// </summary>
        private void InitAdapter()
        {
            SqlConnection connection = this.getConnection();
            adapter = new SqlDataAdapter("select * from steelname", connection);
            adapter.FillLoadOption = LoadOption.OverwriteChanges;
            //新增
            SqlCommand InsertCommand = new SqlCommand();
            InsertCommand.Connection = connection;
            InsertCommand.CommandText = "insert into steelname,Name) values(@ID,@Code,@Name)";
            InsertCommand.Parameters.Add("@ID", SqlDbType.Int, 4, "ID");
            InsertCommand.Parameters.Add("@Code", SqlDbType.Char, 20, "Code");
            InsertCommand.Parameters.Add("@Name", SqlDbType.VarChar, 50, "Name");
            adapter.InsertCommand = InsertCommand;
            //修改
            SqlCommand UpdateCommand = new SqlCommand();
            UpdateCommand.Connection = connection;
            UpdateCommand.CommandText = "update steelname set Code=@Code,Name=@Name where ID=@ID";
            UpdateCommand.Parameters.Add("@ID", SqlDbType.Int, 4, "ID");
            UpdateCommand.Parameters.Add("@Code", SqlDbType.Char, 20, "Code");
            UpdateCommand.Parameters.Add("@Name", SqlDbType.VarChar, 50, "Name");
            adapter.UpdateCommand = UpdateCommand;
            //删除
            SqlCommand DeleteCommand = new SqlCommand();
            DeleteCommand.Connection = connection;
            DeleteCommand.CommandText = "delete steelname where steelname_id=@steelname_id";
            DeleteCommand.Parameters.Add("@steelname_id", SqlDbType.Int, 4, "steelname_id");
            adapter.DeleteCommand = DeleteCommand;
            //添加表映射
            //DataTableMapping TableMapping = new DataTableMapping();
            //TableMapping = adapter.TableMappings.Add("Users", "Users");
            //TableMapping.ColumnMappings.Add("Code", "Code");
            //TableMapping.ColumnMappings.Add("Name", "Name");
            //TableMapping.DataSetTable = "SteelName";
        }

        /// <summary>
        /// 把控件绑定到数据源
        /// </summary>
        private void BindingControl()
        {
            this.dataGridView1.DataSource = dsMain;
            this.dataGridView1.DataMember = "steelname";
            //this.dataGridView1.Columns[0].Width = 40;
            //this.txtID.DataBindings.Add("Text", dsMain, "Users.ID");
            //this.txtCode.DataBindings.Add("Text", dsMain, "Users.Code");
            //this.txtName.DataBindings.Add("Text", dsMain, "Users.Name");
        }

        /// <summary>
        /// 从Sql Server中获取数据
        /// </summary>
        private void getData()
        {
            if (dsMain == null)
            {
                dsMain = new DataSet();
            }
            else
            {
                dsMain.Clear();
            }
            adapter.Fill(dsMain, "steelname");
        }

        //新增
        private void button1_Click(object sender, EventArgs e)
        {
            this.BindingContext[dsMain, "steelname"].AddNew();
            this.BindingContext[dsMain, "steelname"].EndCurrentEdit();//结束编译
            //this.txtCode.Focus();
        }

        //删除
        private void button2_Click(object sender, EventArgs e)
        {
            if (this.BindingContext[dsMain, "steelname"].Position > -1)
            {
                if (MessageBox.Show("是否要删除此记录？", "提示", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    this.BindingContext[dsMain, "steelname"].RemoveAt(this.BindingContext[dsMain, "steelname"].Position);
                    Save();
                }
            }
        }

        //保存
        private void button3_Click(object sender, EventArgs e)
        {
            this.BindingContext[dsMain, "steelname"].EndCurrentEdit();
            Save();
        }

        //刷新
        private void button4_Click(object sender, EventArgs e)
        {
            getData();
        }

        private void Save()
        {
            try
            {
                adapter.Update(dsMain, "steelname");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}

 表中的某一列有ComBox绑定在一起：

this.comboBox1.DataSource = dsMain.Tables[0];   //tables[0]第一列
comboBox1.DisplayMember = "steeltype_id";
comboBox1.ValueMember = "steeltype_id";