C# ConfigurationSettings.AppSettings 已过时
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ConfigurationSettings.AppSettings is obsolete
提问by Daniel Kmak
The following code works fine:
以下代码工作正常：
string api_url = ConfigurationSettings.AppSettings["api-url"].ToString();
with a warning message as follows:
警告信息如下：
'System.Configuration.ConfigurationSettings.AppSettings' is obsolete: '"This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings"'
'System.Configuration.ConfigurationSettings.AppSettings' 已过时：'"此方法已过时，已被 System.Configuration!System.Configuration.ConfigurationManager.AppSettings 取代"'
As suggested by the warning message, I tried replacing ConfigurationSettings.AppSettingswith ConfigurationManager.AppSettings
正如警告消息所建议的那样，我尝试替换ConfigurationSettings.AppSettings为ConfigurationManager.AppSettings
string api_url = ConfigurationManager.AppSettings["api-url"].ToString();
Now an error message appears, stating:
现在会出现一条错误消息，指出：
The name 'ConfigurationManager' does not exist in the current context
当前上下文中不存在名称“ConfigurationManager”
These are the namespaces imported:
这些是导入的命名空间：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Configuration;
Please help me.
请帮我。
采纳答案by Vortex
Not only do you need to add System.Configurationin front of ConfigurationManager.AppSettings["api-url"].ToString();you also have to add the reference to the assembly System.Configuration.dll.
你不仅需要System.Configuration在ConfigurationManager.AppSettings["api-url"].ToString();你前面添加，还必须添加对程序集的引用System.Configuration.dll。
Here is link to similar question The name 'ConfigurationManager' does not exist in the current context
回答by Nick Binnet
Add reference to System.Configuration.
添加对 System.Configuration 的引用。
回答by manojlds
Add a reference to System.Configuration. The deprecated one was in System.dllbut the same namespace System.Configuration
添加对System.Configuration. 已弃用System.dll的名称在相同的命名空间中System.Configuration
