C# 如何从 MVC4 中的 web.config 获取字符串值
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How to get a String value from web.config in MVC4
提问by iburak
I want to get a logFilePath value which I gave by hardcode in to appSettings. I am trying to reach the key value by
我想获得一个 logFilePath 值，我通过硬编码在 appSettings 中提供了该值。我试图通过
System.Configuration.Configuration rootWebConfig1 = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(null);
System.Configuration.KeyValueConfigurationElement customSetting = rootWebConfig1.AppSettings.Settings["azureLogUrl"];
string pathValue = customSetting.Value;
but I am getting null reference exception. How can I get the value from web.config file?
但我收到空引用异常。如何从 web.config 文件中获取值？
采纳答案by juhan_h
Use:
用：
string pathValue = ConfigurationManager.AppSettings["azureLogUrl"];
You do not need to cast this to string and check for nulls because documentation states:
您不需要将其转换为字符串并检查空值，因为文档说明：
Values read from the appSettings element of the Web.config file are always of type String. If the specified key does not exist in the Web.config file, no error occurs. Instead, an empty string is returned.
从 Web.config 文件的 appSettings 元素读取的值始终为 String 类型。如果 Web.config 文件中不存在指定的键，则不会发生错误。相反，返回一个空字符串。
回答by Srinivas
You can get the value from web.config like this :
您可以像这样从 web.config 获取值：
string pathValue = WebConfigurationManager.AppSettings["azureLogUrl"].ToString();
