气象信息API

用WPF技术搭建简单的气象免费小控件，注册取得key

 前端代码：

  <Grid>
      <Grid.ColumnDefinitions>
          <ColumnDefinition Width="611*"/>
          <ColumnDefinition Width="189*"/>
      </Grid.ColumnDefinitions>
      <StackPanel Margin="10,10,10,10" Grid.ColumnSpan="2">
          <TextBlock  Text="输入城市："/>
          <TextBox x:Name="txtCity" Width="200"/>
          <Button Width="200" Content="取得天气" Click="btnGetWeather_Click"  Margin="0,10,10,10"/>
          <TextBlock Text="气象信息："  Margin="0,20,0,0" />
          <TextBlock x:Name="txtqixiangxinxi"/>
      </StackPanel>
   

  </Grid>

后端逻辑

public partial class MainWindow : Window
{
    private const string ApiKey = "key";
    private const string ApiBaseUrl = "https://api.openweathermap.org/data/2.5/weather";
    public MainWindow()
    {
        InitializeComponent();
    }

    private async void btnGetWeather_Click(object sender, RoutedEventArgs e)
    {
        string city = txtCity.Text;
        string apiUrl = $"{ApiBaseUrl}?q={city}&appid={ApiKey}";
        try
        {
            HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = await httpClient.GetAsync(apiUrl);
            response.EnsureSuccessStatusCode();
            string responseBody = await response.Content.ReadAsStringAsync();
            // 解析 JSON 数据，提取天气信息
            // 这里需要根据您选择的 API 和其返回的数据结构进行解析
            // 示例：从 OpenWeatherMap API 中提取温度信息
            dynamic weatherData = JsonConvert.DeserializeObject(responseBody);
            double temperature = weatherData.main.temp - 273.15; // 转换为摄氏度
            txtqixiangxinxi.Text = $"Temperature in {city}: {temperature}°C";
        }
        catch (Exception ex)
        {
            MessageBox.Show($"Error: {ex.Message}");
        }
    }

}

https://openweathermap.org/

Weather Conditions - OpenWeatherMap