IBindingList.Find(PropertyDescriptor, Object) IBindingList.Find(PropertyDescriptor, Object) IBindingList.Find(PropertyDescriptor, Object) IBindingList.Find(PropertyDescriptor, Object) Method

Definição

Retorna o índice da linha que tem o PropertyDescriptor determinado.Returns the index of the row that has the given PropertyDescriptor.

public:
 int Find(System::ComponentModel::PropertyDescriptor ^ property, System::Object ^ key);
public int Find (System.ComponentModel.PropertyDescriptor property, object key);
abstract member Find : System.ComponentModel.PropertyDescriptor * obj -> int
Public Function Find (property As PropertyDescriptor, key As Object) As Integer

Parâmetros

key
Object Object Object Object

O valor do parâmetro property a pesquisar.The value of the property parameter to search for.

Retornos

O índice da linha que tem o PropertyDescriptor determinado.The index of the row that has the given PropertyDescriptor.

Exceções

Exemplos

O exemplo de código a seguir demonstra como implementar Find o método.The following code example demonstrates how to implement the Find method.

    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

Comentários

Esse método selecionará a primeira linha em que o valor do property parâmetro é igual ao valor key do parâmetro.This method will select the first row where the value of the property parameter equals the value of the key parameter.

Esse método terá suporte se SupportsSearching for true, caso contrário, esse método NotSupportedExceptionlançará um.This method is supported if SupportsSearching is true, otherwise this method throws a NotSupportedException.

Aplica-se a