其他线程中创建控件问题

Question

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            backgroundWorker1.RunWorkerAsync();
        }        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            Button bb = new Button();
            bb.Location = new System.Drawing.Point(90, 90);
            bb.Name = "button12";
            bb.Size = new System.Drawing.Size(75, 23);
            bb.TabIndex = 0;
            bb.Text = "button1";
            bb.UseVisualStyleBackColor = true;
            this.Controls.Add(bb);
            this.ResumeLayout(false);
        }
    }backgroundWorker1 是 backgroundWorker
为什么 主船体中显示不出来 button12 按钮呢

Answer 1

加一段:
 private delegate void addcontrolmethod(Control ctl);
        private void addcontrol(Control ctl)
        {
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new addcontrolmethod(this.addcontrol), new object[] { ctl });
            }
            else
            {
                this.Controls.Add(ctl);
            }
        }
把原来的this.Controls.Add(bb);
改为this.addcontrol(bb);