WinForm多线程及委托防止界面假死

2019-11-17 02:44:17

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WinForm多线程及委托防止界面假死

当有大量数据需要计算、显示在界面或者调用sleep函数时，容易导致界面卡死，可以采用多线程加委托的方法解决。

using System; using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Threading; namespace WindowsFormsapplication1{ public partial class FormMain : Form { DataTable table; int currentIndex = 0; int max = 10000; public FormMain() { InitializeComponent(); } PRivate void button1_Click(object sender, EventArgs e) { button1.Enabled = false; Thread thread = new Thread(new ThreadStart(LoadData)); thread.IsBackground = true; thread.Start(); progressBar1.Minimum = 0; progressBar1.Maximum = max; } private void LoadData() { SetLableText("数据加载中..."); currentIndex = 0; table = new DataTable(); table.Columns.Add("id"); table.Columns.Add("name"); table.Columns.Add("age"); while (currentIndex < max) { SetLableText(string.Format("当前行:{0},剩余量:{1},完成比例:{2}%", currentIndex, max - currentIndex, (Convert.ToDecimal(currentIndex) / Convert.ToDecimal(max) * 100).ToString("f0"))); SetPbValue(currentIndex); DataRow dr = table.NewRow(); dr["id"] = currentIndex; string name = "张三"; dr["name"] = name; dr["age"] = currentIndex + 5; table.Rows.Add(dr); currentIndex++; } SetDgvDataSource(table); SetLableText("数据加载完成！"); this.BeginInvoke(new MethodInvoker(delegate() { button1.Enabled = true; })); } delegate void labDelegate(string str); private void SetLableText(string str) { if (label1.InvokeRequired) { Invoke(new labDelegate(SetLableText), new string[] { str }); } else { label1.Text = str; } } delegate void dgvDelegate(DataTable table); private void SetDgvDataSource(DataTable table) { if (dataGridView1.InvokeRequired) { Invoke(new dgvDelegate(SetDgvDataSource), new object[] { table }); } else { dataGridView1.DataSource = table; } } delegate void pbDelegate(int value); private void SetPbValue(int value) { if (progressBar1.InvokeRequired) { Invoke(new pbDelegate(SetPbValue), new object[] { value }); } else { progressBar1.Value = value; } } }}

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