ConfigurationManager读取配置文件

最新推荐文章于 2024-02-02 09:33:03 发布

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最新推荐文章于 2024-02-02 09:33:03 发布

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文章标签： json 数据库

原文链接：http://www.cnblogs.com/ycdx2001/archive/2009/04/08/1431698.html

本文介绍如何使用C#从App.config文件中读取应用程序设置和数据库连接字符串。通过使用ConfigurationManager,可以轻松获取如用户名、密码等appSettings部分的数据及数据库连接信息。

App.config文件有如下内容：

<?xml version="1.0" encoding="utf-8" ?>

</appSettings>

</connectionStrings>

</configuration>

AppSettingsSection 对象包含配置文件的 appSettings 节的内容

var userName = ConfigurationManager.AppSettings["username"];

var pwd = ConfigurationManager.AppSettings["password"];

注：必须引入using System.Configuration的DLL。

读取数据库连接字符串connectionStrings 节的内容

ConnectionStringSettingsCollection connections = ConfigurationManager.ConnectionStrings;

var conStr = connections["constr"];

以下是返回集合：

// Show how to use ConnectionStrings.
static void DisplayConnectionStrings()
{
// Get the ConnectionStrings collection.
ConnectionStringSettingsCollection connections =
ConfigurationManager.ConnectionStrings;
Console.WriteLine();
Console.WriteLine("Connection strings:");
// Loop to get the collection elements.
IEnumerator conEnum =
connections.GetEnumerator();
int i = 0;
while (conEnum.MoveNext())
{
string name = connections[i].Name;
string connectionString = connections[name].ConnectionString;
string provider = connections[name].ProviderName;
Console.WriteLine("Name:               {0}", name);
Console.WriteLine("Connection string:  {0}", connectionString);
Console.WriteLine("Provider:           {0}", provider);
}
}

转载于:https://www.cnblogs.com/ycdx2001/archive/2009/04/08/1431698.html