BindingList<T>.SupportsSearchingCore 属性
定义
获取一个值,该值指示列表是否支持搜索。Gets a value indicating whether the list supports searching.
protected:
virtual property bool SupportsSearchingCore { bool get(); };
protected virtual bool SupportsSearchingCore { get; }
member this.SupportsSearchingCore : bool
Protected Overridable ReadOnly Property SupportsSearchingCore As Boolean
属性值
如果列表支持搜索,则为 true;否则为 false。true if the list supports searching; otherwise, false. 默认值为 false。The default is false.
示例
下面的代码示例演示如何使用 SupportsSearchingCore 成员。The following code example demonstrates how to use the SupportsSearchingCore member.
public class MyFontList : BindingList<Font>
{
protected override bool SupportsSearchingCore
{
get { return true; }
}
protected override int FindCore(PropertyDescriptor prop, object key)
{
// Ignore the prop value and search by family name.
for (int i = 0; i < Count; ++i)
{
if (Items[i].FontFamily.Name.ToLower() == ((string)key).ToLower())
return i;
}
return -1;
}
}
}
Public Class MyFontList
Inherits BindingList(Of Font)
Protected Overrides ReadOnly Property SupportsSearchingCore() As Boolean
Get
Return True
End Get
End Property
Protected Overrides Function FindCore(ByVal prop As PropertyDescriptor, _
ByVal key As Object) As Integer
' Ignore the prop value and search by family name.
Dim i As Integer
While i < Count
If Items(i).FontFamily.Name.ToLower() = CStr(key).ToLower() Then
Return i
End If
i += 1
End While
Return -1
End Function
End Class
注解
BindingList<T>类不提供搜索的基实现,因此 SupportsSearchingCore false 默认情况下总是返回。The BindingList<T> class does not provide a base implementation of searching, so SupportsSearchingCore always returns false by default. 有关实现搜索的详细信息,请参阅 IBindingList.Find 方法。For more information about implementing searching, see the IBindingList.Find method.