Question

所以我使用Visual Studio，我有4个文本框，每个文本框中都有1到5之间的数字，然后我有一个计算按钮，一旦点击将计算这些数字的百分比，奖项以图像形式输出（金星（90％或更高），银星（90-75％），青铜星（75-60％）或无图像。该奖项输出到图像框中。我对如何做到这一点并没有任何指示，所以欢迎所有的帮助。

这是我目前的代码

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void btnCalculate_Click(object sender, RoutedEventArgs e)
    {
        double dPercentage = Convert.ToDouble(((Convert.ToInt32(txtScore1.Text) + Convert.ToInt32(txtScore2.Text) + Convert.ToInt32(txtScore3.Text) + Convert.ToInt32(txtScore4.Text)) * 20) / 100);//calculates the percentage

        if(dPercentage > 89)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/gold.png", UriKind.RelativeOrAbsolute));
        }
        else if(dPercentage > 74 && < 90)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/silver.png", UriKind.RelativeOrAbsolute));
        }
        else (dPercentage > 59 && < 74)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/bronze.png", UriKind.RelativeOrAbsolute));
        }
    }
}}

Answer 1

首先你的逻辑错了

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void btnCalculate_Click(object sender, RoutedEventArgs e)
    {
    double dPercentage = Convert.ToDouble(((Convert.ToInt32(txtScore1.Text) + Convert.ToInt32(txtScore2.Text) + Convert.ToInt32(txtScore3.Text) + Convert.ToInt32(txtScore4.Text))) / 20.0) * 100;//calculates the percentage

    if(dPercentage >= 90)
    {
        //Percentage is greater than 89
        MessageBox.Show("Eligible For the Gold Award");

        imgAward.Source = new BitmapImage(new Uri("pack://application:,,,/Images/gold.png", UriKind.Absolute));
    }
    else if(dPercentage >= 75)
    {
            //(90-75%)
     MessageBox.Show("Eligible For the Silver Award");
        imgAward.Source = new BitmapImage(new Uri("pack://application:,,,/Images/silver.png", UriKind.Absolute));
    }
    else if (dPercentage >= 60)
    {
            // (75 - 60%)
     MessageBox.Show("Eligible For the Bronze Award");
        imgAward.Source = new BitmapImage(new Uri("pack://application:,,,/Images/bronze.png", UriKind.Absolute));
    }else{
        MessageBox.Show("Not Eligible For the Award");
        }
}}

Answer 2

除了决策中的逻辑错误，百分比计算是错误的。试试这个......

    private void btnCalculate_Click(object sender, RoutedEventArgs e)
    {
        double dPercentage = Convert.ToDouble(((Convert.ToInt32(txtScore1.Text) + Convert.ToInt32(txtScore2.Text) + Convert.ToInt32(txtScore3.Text) + Convert.ToInt32(txtScore4.Text))) / 20.0) * 100;//calculates the percentage

        if (dPercentage >= 90)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/gold.png", UriKind.RelativeOrAbsolute));
        }
        else if (dPercentage >= 75)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/silver.png", UriKind.RelativeOrAbsolute));
        }
        else if (dPercentage >= 60)
        {
            imgAward.Source = new BitmapImage(new Uri(@"Images/bronze.png", UriKind.RelativeOrAbsolute));
        }
        else
        {
            imgAward.Source = null;
        }
    }

百分比计算和输出这些百分比的图像c＃WPF

2 个答案: