Question

我有Form1类

中包含的方法

 public void ExecuteMessageOperations(MSMQMessage MSMQ)
    {
        switch (MSMQ.MesType)
        {
            case "01": { label1.Text = MSMQ.MesContent; MessageBox.Show(MSMQ.MesContent); button1.Text = MSMQ.MesContent; };
                break;
            case "02":
                {
                    dataGridView1.Columns.Add("Data", "Data");
                    dataGridView1.Rows.Add(MSMQ.MesContent);

                };
                break;
            case "03":
                {
                    string[] separated = MSMQ.MesContent.Split(new Char[] { ',' });
                    try
                    {
                        Rectangle rect = new Rectangle(Convert.ToInt16(separated[0]),
                            Convert.ToInt16(separated[1]), Convert.ToInt16(separated[2]),
                            Convert.ToInt16(separated[2]));
                        SolidBrush brush = new SolidBrush(XMLConfigs.GetBrushColor());
                        Graphics Grph = pictureBox1.CreateGraphics();
                        Grph.FillEllipse(brush, rect);

                    }
                    catch (Exception)
                    {
                        MessageBox.Show("Wrong parameters");
                    };
                };
                break;
        }

调用MSMQMessageThread的类，它包含Form1。这个类有方法

public void PerformOperations()
    {
        while (true)
        {
            try
            {
                Form1 f = new Form1();
                f.ExecuteMessageOperations(MSMQMessage.ReceiveMessage(@".\private$\TestQueue"));
            }
            catch (System.Messaging.MessageQueueException) { }
        }
    }

代码正常编译，但方法ExecuteMessageOperations不执行任何操作。错误在哪里以及如何在方法ExecuteMessageOperations中访问Form1组件？附：对不起我的英文

Answer 1

在switch语句和'step over'之间放置一个断点。如果它实际上是在调用该方法，请告诉我们。

C＃从类中访问表单组件

1 个答案: