BindingList<T>.SupportsSearchingCore Properti

Definisi

Ruang nama:

System.ComponentModel

Rakitan:

System.ComponentModel.TypeConverter.dll

Sumber:

BindingList.cs

Mendapatkan nilai yang menunjukkan apakah daftar mendukung pencarian.

protected:
 virtual property bool SupportsSearchingCore { bool get(); };

protected virtual bool SupportsSearchingCore { get; }

member this.SupportsSearchingCore : bool

Protected Overridable ReadOnly Property SupportsSearchingCore As Boolean

Nilai Properti

Boolean

true jika daftar mendukung pencarian; jika tidak, false. Default adalah false.

Contoh

Contoh kode berikut menunjukkan cara menggunakan SupportsSearchingCore anggota.

    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

Keterangan

Kelas BindingList<T> tidak menyediakan implementasi dasar pencarian, jadi SupportsSearchingCore selalu kembali false secara default. Untuk informasi selengkapnya tentang menerapkan pencarian, lihat IBindingList.Find metode .