BinderBase<T>.IValueSource.TryGetValue 方法

定义

命名空间:

System.CommandLine.Binding

程序集:

System.CommandLine.dll

尝试从绑定上下文获取值。 返回值指示是否存在与指定值描述符匹配的值。

 virtual bool System.CommandLine.Binding.IValueSource.TryGetValue(System::CommandLine::Binding::IValueDescriptor ^ valueDescriptor, System::CommandLine::Binding::BindingContext ^ bindingContext, [Runtime::InteropServices::Out] System::Object ^ % boundValue) = System::CommandLine::Binding::IValueSource::TryGetValue;

bool IValueSource.TryGetValue (System.CommandLine.Binding.IValueDescriptor valueDescriptor, System.CommandLine.Binding.BindingContext? bindingContext, out object? boundValue);

abstract member System.CommandLine.Binding.IValueSource.TryGetValue : System.CommandLine.Binding.IValueDescriptor * System.CommandLine.Binding.BindingContext * obj -> bool
override this.System.CommandLine.Binding.IValueSource.TryGetValue : System.CommandLine.Binding.IValueDescriptor * System.CommandLine.Binding.BindingContext * obj -> bool

Function TryGetValue (valueDescriptor As IValueDescriptor, bindingContext As BindingContext, ByRef boundValue As Object) As Boolean Implements IValueSource.TryGetValue

参数

valueDescriptor

IValueDescriptor

要绑定的值的描述符。

bindingContext

BindingContext

要从中绑定值的绑定上下文。

boundValue

Object

此方法返回时，包含绑定值。

返回

Boolean

如果找到了匹配值，则为 true；否则为 false。

实现

TryGetValue(IValueDescriptor, BindingContext, Object)