简单的异步调用

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

namespace WinAppAsync
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnLoad_Click(object sender, EventArgs e)
        {
            this.Text = "正在加载";
            //异步执行
            LoadDataHandlerInstance = new LoadDataHandler(CreateData);
            AsyncCallback callBackMethod = new AsyncCallback(CallBackLoad);
            LoadDataHandlerInstance.BeginInvoke(callBackMethod, LoadDataHandlerInstance);
        }

        public delegate DataTable LoadDataHandler();
        public LoadDataHandler LoadDataHandlerInstance = null;
        private DataTable CreateData()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("Id", typeof(string));
            dt.Columns.Add("Name", typeof(string));
            dt.Columns.Add("Address", typeof(string));

            for (int i = 0; i < 800000; i++)
            {
                DataRow row = dt.NewRow();
                row["Id"] = i.ToString();
                row["Name"] = "Name_" + i.ToString();
                row["Address"] = "Address_" + i.ToString();
                dt.Rows.Add(row);
            }
            return dt;
        }
        public void CallBackLoad(IAsyncResult result)
        {
            LoadDataHandler loadInstance = (LoadDataHandler)result.AsyncState;
            DataTable dt = loadInstance.EndInvoke(result);

            bindGridHandlerInstance = new BindGridHandler(BindGrid);
            this.dgv.BeginInvoke(bindGridHandlerInstance, new object[] { dt });//执行控件的Invoke或BeginInvoke以修改主线程上的属性
        }

        public delegate void BindGridHandler(DataTable dt);
        public BindGridHandler bindGridHandlerInstance = null;
        private void BindGrid(DataTable dt)
        {
            this.dgv.DataSource = dt;
        }
    }
}