Response response = new Response();
这是显示错误的行'无法将类型ResponseBase隐式转换为响应':
response = await BaseFlow.Invoke(jsonRawRequest, response);
......它正在呼唤:
public static async Task<ResponseBase> Invoke(JToken jsonRawRequest, ResponseBase responseBase)
{...}
...这是响应类:
class Response : ResponseBase
{
// empty
}
...和 ResponseBase :
public class ResponseBase
{...}
为什么会这样?不应该说'不能隐式转换类型响应到ResponseBase'而不是其他方式arround,因为我试图将一类Response传递给接受ResponseBase的方法?以及如何解决它?
我浏览过互联网并声称我可以将派生类传递给接受基类的方法。
答案 0 :(得分:3)
当您尝试将<?php
/*
Plugin Name: Analytics
Plugin URI: https://chriscather.wordpress.com
Description: Plugin for adding Google Analytics to website
Author: C. Cather
Version: 1.0
Author URI: https://chriscather.wordpress.com
*/
add_action('admin_menu', 'cc_analytics_menu');
function cc_analytics_menu() {
add_menu_page('CC Analytics', 'CC Analytics', 'administrator', 'cc_analytics_settings_page', 'cc_analytics_menu', plugins_url('analytics/images/analytics.png'));
}
add_action( 'admin_init', 'cc_analytics_settings' );
function cc_analytics_settings() {
register_setting( 'cc_analytics_settings_group', 'accountant_name' );
}
function cc_analytics_settings_page(){?>
<div class="wrap">
<h2>Staff Details</h2>
<form method="post" action="options.php">
<?php settings_fields( 'cc_analytics_settings_group' ); ?>
<?php do_settings_sections( 'cc_analytics_settings_group' ); ?>
<table class="form-table">
<tr valign="top">
<th scope="row">Accountant Name</th>
<td><input type="text" name="accountant_name" value="<?php echo esc_attr( get_option('accountant_name') ); ?>" /></td>
</tr>
</table>
<?php submit_button(); ?>
</form>
</div>
<?php }
add_action( 'wp_head', 'cc_analytics' );
function cc_analytics() { ?>
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', "<?php cc_analytics_settings_group('accountant_name') ?>", 'auto');
ga('send', 'pageview');
</script>
<?php }
作为参数传递时,问题并非如此。
当您尝试将response
(Invoke
类型)的结果分配给ResponseBase
变量(response
类型)时出现错误。
要解决此问题,只需将Response
类型更改为response
:
ResponseBase
或使用新的ResponseBase response = new Response();
变量。