ConnectionStringSettingsCollection.Clear 方法

定义

从集合中移除所有 ConnectionStringSettings 对象。Removes all the ConnectionStringSettings objects from the collection.

public:
 void Clear();
public void Clear ();
member this.Clear : unit -> unit
Public Sub Clear ()

示例

下面的示例演示如何 ConnectionStringSettings 从集合中移除所有对象 ConnectionStringSettingsCollectionThe following example shows how to remove all the ConnectionStringSettings objects from the ConnectionStringSettingsCollection collection.

// Clear connection strings collection.
static void ClearConnectionStrings()
{

    // Get the configuration file.
    System.Configuration.Configuration config =
        ConfigurationManager.OpenExeConfiguration(
        ConfigurationUserLevel.None);

    // Clear the connection strings collection.
    ConnectionStringsSection csSection =
        config.ConnectionStrings;
    csSection.ConnectionStrings.Clear();
   
    // Save the configuration file.
    config.Save(ConfigurationSaveMode.Modified);

    Console.WriteLine("Connection strings cleared.");
}
' Clear connection strings collection.
Shared Sub ClearConnectionStrings() 
    
    ' Get the application configuration file.
    Dim config _
    As System.Configuration.Configuration = _
    ConfigurationManager.OpenExeConfiguration( _
    ConfigurationUserLevel.None)

    ' Clear the connection strings collection.
    Dim csSection _
    As ConnectionStringsSection = _
    config.ConnectionStrings
    csSection.ConnectionStrings.Clear()
    
    ' Save the configuration file.
    config.Save(ConfigurationSaveMode.Modified)
    
    Console.WriteLine("Connection strings cleared.")

End Sub
 

注解

Clear方法从当前配置层次结构级别的配置文件中移除所有连接字符串,并 <clear> 在该文件中写入标记。The Clear method removes all the connection strings from the configuration file at the current configuration hierarchy level and writes a <clear> tag in the file. <clear>标记表示系统忽略父配置文件中定义的所有连接字符串。The <clear> tag signifies that all the connection strings defined in the parent configuration files are disregarded by the system.

适用于

另请参阅