public void InvokeMessage(string index, string result)
{
    Label lbltip = new Label();
    lbltip.BackColor = Color.Transparent;
    lbltip.Name = "lbltip";
    lbltip.Text = "暂无产品数据!";
    lbltip.ForeColor = Color.White;
    lbltip.Location = new Point(400, 25);
    if (index == "1"){
        this.gvBuildList.Controls.Add(lbltip);
    }
    
    this.Refresh();
}

public void InvokeFrm(string index,string result)
{
    this.Invoke(new InvokeMesage(InvokeMessage), new object[] { index,result });
}

public static int Main(){  
    Thread thread = new Thread(new ThreadStart(TestAlpha));
    thread.IsBackground = true;
    thread.Start();
}   

public void TestAlpha(){  

    int i = 0;
    while (i < 3)  
    {
        InvokeFrm("1", i++);
    }  
    
}