using System;using System.Data;using System.Threading;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;
namespace MultiThreadOperateControls{ /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private delegate void BindDataGridDelegate(); // 创建委托和委托对象 private BindDataGridDelegate bindDataGridDelegate;
Thread bindGridThread;
private System.Windows.Forms.Button btnErrorHandle; private System.Windows.Forms.Button btnSuccessHandle; private System.Windows.Forms.DataGrid dataGrid1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null;
public Form1() { bindDataGridDelegate = new BindDataGridDelegate(BindDataGrid); // 实例化委托对象并指定调用的方法
// // Windows 窗体设计器支持所必需的 // InitializeComponent();
// // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // }
/// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.btnErrorHandle = new System.Windows.Forms.Button(); this.btnSuccessHandle = new System.Windows.Forms.Button(); this.dataGrid1 = new System.Windows.Forms.DataGrid(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit(); this.SuspendLayout(); // // btnErrorHandle // this.btnErrorHandle.Location = new System.Drawing.Point(40, 24); this.btnErrorHandle.Name = "btnErrorHandle"; this.btnErrorHandle.Size = new System.Drawing.Size(112, 40); this.btnErrorHandle.TabIndex = 0; this.btnErrorHandle.Text = "ErrorHandle"; this.btnErrorHandle.Click += new System.EventHandler(this.btnErrorHandle_Click); // // btnSuccessHandle // this.btnSuccessHandle.Location = new System.Drawing.Point(232, 24); this.btnSuccessHandle.Name = "btnSuccessHandle"; this.btnSuccessHandle.Size = new System.Drawing.Size(112, 40); this.btnSuccessHandle.TabIndex = 1; this.btnSuccessHandle.Text = "SuccessHandle"; this.btnSuccessHandle.Click += new System.EventHandler(this.btnSuccessHandle_Click); // // dataGrid1 // this.dataGrid1.DataMember = ""; this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dataGrid1.Location = new System.Drawing.Point(32, 88); this.dataGrid1.Name = "dataGrid1"; this.dataGrid1.Size = new System.Drawing.Size(336, 176); this.dataGrid1.TabIndex = 2; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(408, 301); this.Controls.Add(this.dataGrid1); this.Controls.Add(this.btnSuccessHandle); this.Controls.Add(this.btnErrorHandle); this.Name = "Form1"; this.Text = "多线程窗体控件处理事例"; this.Load += new System.EventHandler(this.Form1_Load); ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit(); this.ResumeLayout(false);
} #endregion
/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); }
private void Form1_Load(object sender, System.EventArgs e) { BindDataGrid(); }
private void btnErrorHandle_Click(object sender, System.EventArgs e) { StopBindThread(); bindGridThread = new Thread(new ThreadStart(BindDataGrid)); // 直接调用非此线程创建的控件的操作 抛出异常 bindGridThread.Start(); } private void btnSuccessHandle_Click(object sender, System.EventArgs e) { StopBindThread(); bindGridThread = new Thread(new ThreadStart(InvokeBindDataGrid)); // 通过委托调用,合法 bindGridThread.Start(); }
private void BindDataGrid() { int dataGridItemLenght = 5; DataTable dt = new DataTable("DataGridSource"); dt.Columns.Add("RandomValue"); for(int i=0;i<dataGridItemLenght;i++) { Random r = new Random(); DataRow dr = dt.NewRow(); dr[0] = r.Next(1,500); dt.Rows.Add(dr); }
try { dataGrid1.DataSource = dt; } catch(Exception ex) { MessageBox.Show(ex.Message); } } private void InvokeBindDataGrid() // 调用非此线程创建的控件的操作必须用 Invoke 或 BeginInvoke .否则将抛出异常 { dataGrid1.Invoke(bindDataGridDelegate,null); } private void StopBindThread() { if((bindGridThread != null)&&(bindGridThread.IsAlive)) { bindGridThread.Abort(); bindGridThread.Join(); } bindGridThread = null; } }}
