vb.net中System.Configuration.Configuration用法
时间: 2024-01-24 16:15:29 浏览: 38
在VB.NET中,System.Configuration.Configuration类用于访问和操作配置文件。它提供了一种方便的方式来读取和写入配置文件中的设置。
以下是System.Configuration.Configuration类的一些常见用法:
1. 获取配置文件的根节点:
```vb
Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
Dim root As ConfigurationSection = config.GetSection("configuration")
```
2. 获取appSettings节点下的值:
```vb
Dim appSettings As AppSettingsSection = config.AppSettings
Dim value As String = appSettings.Settings("key").Value
```
3. 修改appSettings节点下的值:
```vb
config.AppSettings.Settings("key").Value = "new value"
config.Save()
```
4. 获取connectionStrings节点下的连接字符串:
```vb
Dim connectionStrings As ConnectionStringsSection = config.ConnectionStrings
Dim connectionString As String = connectionStrings.ConnectionStrings("name").ConnectionString
```
5. 修改connectionStrings节点下的连接字符串:
```vb
config.ConnectionStrings.ConnectionStrings("name").ConnectionString = "new connection string"
config.Save()
```
请注意,上述示例中的"key"和"name"是配置文件中的键或名称,您需要根据实际情况进行替换。