Question

我的表单上有一个Get Status按钮，目前的代码如下所示：

private void btnGetStatus_Click(object sender, EventArgs e)
    {
        // Check if a runner has been selected
        if (lstRunners.SelectedIndex > -1)
        {
            // Obtain selected runner
            Runner selectedRunner = (Runner)lstRunners.SelectedItem;

            // Call the method in Runner class to get the runner's status
            selectedRunner.GetStatus(selectedRunner);
        }
    }
}
}

现在我有Runner课程：

public void GetStatus(Runner selectedRunner)
    {
        if (selectedRunner.HasFinished == true)
        {
            lblRunnerInfo.Text = "Runner has already finished!";
        }
    }

我基本上要做的是让btnGetStatus调用GetStatus类中的Runner方法，然后我想要的方法就是检查boolean HasFinished看看跑步者是否已经完成，如果他们已经完成，lblRunnerInfo.Text有一条消息反映这一点，如果布尔值为假，那么基本上输出一条消息说＆＃34;跑者有尚未完成/未完成＆＃34;

我不太确定从类中访问表单控件是否正确，或者是否可以完成，但我不确定如何按照我想要的方式执行此操作（获取） GetStatus方法检查跑步者的状态，而不是让btnGetStatus解雇代码。）

Answer 1

我认为您正在寻找的是：

lblRunnerInfo.Text = selectedRunner.GetStatus();

然后在跑步者班：

public string GetStatus()
{
    if (this.HasFinished == true)
    {
        return "Runner has already finished!";
    }
    return "Finished";
}

Answer 2

您可以按如下方式更改btnGetStatus_Click：

private void btnGetStatus_Click(object sender, EventArgs e)
{
    // Check if a runner has been selected
    if (lstRunners.SelectedIndex > -1)
    {
        // Obtain selected runner
        Runner selectedRunner = (Runner)lstRunners.SelectedItem;
        // Call the method in Runner class to get the runner's Status
        // CHANGED
        if (selectedRunner.HasFinished)
            lblRunnerInfo.Text = "Runner has already finished";
    }
}

这样，表单处理输出，Runner类负责“运行”。如果您稍后有更复杂的状态，那么您仍然可以为状态添加枚举并检索状态而不是仅检查HasFinished。要检索文本，您需要将Status枚举中的映射添加到相应的文本中。

Answer 3

为什么不直接访问您的HasFinished（）属性？

    private void btnGetStatus_Click(object sender, EventArgs e)
    {
        // Check if a runner has been selected
        if (lstRunners.SelectedIndex > -1)
        {
            // Obtain selected runner
            Runner selectedRunner = (Runner)lstRunners.SelectedItem;

            // Call the method in Runner class to get the runner's status
            if (selectedRunner.HasFinished)
            {
                lblRunnerInfo.Text = "Runner has already finished!";
            }
            else
            {
                lblRunnerInfo.Text = "Runner has NOT finished yet!";
            }
        }
    }

Answer 4

这样的事情

private void btnGetStatus_Click(object sender, EventArgs e)
{
    // Check if a runner has been selected
    if (lstRunners.SelectedIndex > -1)
    {
        // Obtain selected runner
        Runner selectedRunner = (Runner)lstRunners.SelectedItem;

        // Call the method in Runner class to get the runner's status
        lblRunnerInfo.Text = selectedRunner.GetStatus(selectedRunner);
    }

}

然后将GetStatus设置为字符串

public string GetStatus(Runner selectedRunner)
{
    if (selectedRunner.HasFinished == true)
    {
        return "Runner has already finished!";
    }
}

从类中访问表单控件？

4 个答案: