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 ConnectionStringSettingsCollection 。The 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.