How can I update each DataGridView cell from a different thread? Basically, I have 3 threads (main thread "winform", thread 1 and thread 2), moreover, thread 1 and thread 2 are in different class (class 2) and main thread in class 1. I made this work in one class, but I couldn't do in different class. Please any help would be appreciated. Please see the code below which works in one class:
// THIS IS THE DESIGNER FORM CLASS
namespace DelegatesAndCallback
{
partial class class1
{
/// <summary>
/// Variable nécessaire au concepteur.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Nettoyage des ressources utilisées.
/// </summary>
/// <param name="disposing">true si les ressources managées doivent être supprimées ; sinon, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Code généré par le Concepteur Windows Form
/// <summary>
/// Méthode requise pour la prise en charge du concepteur - ne modifiez pas
/// le contenu de cette méthode avec l'éditeur de code.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.pb = new System.Windows.Forms.ProgressBar();
this.dgv = new System.Windows.Forms.DataGridView();
this.Number = new System.Windows.Forms.DataGridViewTextBoxColumn();
((System.ComponentModel.ISupportInitialize)(this.dgv)).BeginInit();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(203, 34);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// pb
//
this.pb.Location = new System.Drawing.Point(16, 415);
this.pb.Name = "pb";
this.pb.Size = new System.Drawing.Size(443, 23);
this.pb.TabIndex = 2;
//
// dgv
//
this.dgv.AllowUserToAddRows = false;
this.dgv.AllowUserToDeleteRows = false;
this.dgv.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dgv.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.Number});
this.dgv.Location = new System.Drawing.Point(167, 76);
this.dgv.Name = "dgv";
this.dgv.Size = new System.Drawing.Size(146, 320);
this.dgv.TabIndex = 3;
//
// Number
//
this.Number.HeaderText = "Number";
this.Number.Name = "Number";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(479, 450);
this.Controls.Add(this.dgv);
this.Controls.Add(this.pb);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.dgv)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ProgressBar pb;
private System.Windows.Forms.DataGridView dgv;
private System.Windows.Forms.DataGridViewTextBoxColumn Number;
}
}
this is class1 main thread
// THIS IS CLASS1 MAIN THREAD
using System;
using System.Collections;
using System.Threading;
using System.Windows.Forms;
namespace DelegatesAndCallback
{
public partial class class1 : Form
{
private Thread newThread1;
private Thread newThread2;
private int i = 0;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
dgv.Paint += dgv_Paint;
// thread #1
newThread1 = new Thread(Process1);
newThread1.Name = "Thread 1";
newThread1.Start();
newThread1.Join();
// thread #2
newThread2 = new Thread(Process2);
newThread2.Name = "Thread 2";
newThread2.Start();
newThread2.Join();
}
private void dgv_Paint(object sender, PaintEventArgs e)
{
//Refresh();
}
public void Process1()
{
for (; i < 10; i++)
{
int i1 = i;
dgv.BeginInvoke(new MethodInvoker(() => dgv.Rows.Add(i1,i1)));
pb.BeginInvoke(new MethodInvoker(() => updateValue(i1)));
dgv.BeginInvoke(new MethodInvoker(() => dgv.Update()));
dgv.BeginInvoke(new MethodInvoker(() => pb.Refresh()));
Thread.Sleep(200);
}
}
public void updateValue(double i1)
{
pb.Value = (int)(100*(i1/19));
}
public void Process2()
{
for (; i < 20; i++)
{
int i1 = i;
dgv.BeginInvoke(new MethodInvoker(() => dgv.Rows.Add(i1, i1)));
pb.BeginInvoke(new MethodInvoker(() => updateValue(i1)));
dgv.BeginInvoke(new MethodInvoker(() => dgv.Update()));
dgv.BeginInvoke(new MethodInvoker(() => pb.Refresh()));
Thread.Sleep(200);
}
}
}
}
this is class2 where i would like to update the datagridview
using System;
using System.Collections;
using System.Threading;
using System.Windows.Forms;
namespace DelegatesAndCallback
{
class DelegateExample
{
// Declaration
public void Process1(){
// HERE NEED TO HELP TO UPADTE/REFRESH AND SET DATEGRIDVIEW VALUE FROM CLASS1
}
public void Process2(){
// HERE NEED TO HELP TO UPADTE/REFRESH AND SET DATEGRIDVIEW VALUE FROM CLASS1
}
}
}
您要做的是将消息委托给拥有该控件的线程,以使其使用您发送消息的数据更新表单。
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