SqlParameterCollection.Contains Metode

Referensi

Definisi

Ruang nama:: System.Data.SqlClient

Rakitan:: System.Data.SqlClient.dll

Rakitan:: System.Data.dll

Paket:: System.Data.SqlClient v4.8.6

Penting

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Menentukan apakah objek yang ditentukan ada di dalam ini SqlParameterCollection.

Overload

Contains(SqlParameter)	Menentukan apakah yang ditentukan SqlParameter ada di dalam ini SqlParameterCollection.
Contains(Object)	Menentukan apakah yang ditentukan Object ada di dalam ini SqlParameterCollection.
Contains(String)	Menentukan apakah nama parameter yang ditentukan ada di ini SqlParameterCollection.

Contains(SqlParameter)

Menentukan apakah yang ditentukan SqlParameter ada di dalam ini SqlParameterCollection.

public:
 bool Contains(System::Data::SqlClient::SqlParameter ^ value);

public bool Contains (System.Data.SqlClient.SqlParameter value);

override this.Contains : System.Data.SqlClient.SqlParameter -> bool

Public Function Contains (value As SqlParameter) As Boolean

Parameter

value: SqlParameter

Nilainya SqlParameter .

Mengembalikan

Boolean

true SqlParameterCollection jika berisi nilai; jika tidak, false.

Lihat juga

Berlaku untuk

Contains(Object)

Menentukan apakah yang ditentukan Object ada di dalam ini SqlParameterCollection.

public:
 override bool Contains(System::Object ^ value);

public:
 virtual bool Contains(System::Object ^ value);

public override bool Contains (object value);

public bool Contains (object value);

override this.Contains : obj -> bool

abstract member Contains : obj -> bool
override this.Contains : obj -> bool

Public Overrides Function Contains (value As Object) As Boolean

Public Function Contains (value As Object) As Boolean

Parameter

value: Object

Nilainya Object .

Mengembalikan

Boolean

true SqlParameterCollection jika berisi nilai; jika tidak, false.

Penerapan

Contains(Object)

Contoh

Contoh berikut menunjukkan implementasi IList antarmuka untuk membuat daftar sederhana berukuran tetap. Kode ini adalah bagian dari contoh yang lebih besar untuk IList antarmuka.

class SimpleList : IList
{
    private object[] _contents = new object[8];
    private int _count;

    public SimpleList()
    {
        _count = 0;
    }

    // IList Members
    public int Add(object value)
    {
        if (_count < _contents.Length)
        {
            _contents[_count] = value;
            _count++;

            return (_count - 1);
        }

        return -1;
    }

    public void Clear()
    {
        _count = 0;
    }

    public bool Contains(object value)
    {
        for (int i = 0; i < Count; i++)
        {
            if (_contents[i] == value)
            {
                return true;
            }
        }
        return false;
    }

    public int IndexOf(object value)
    {
        for (int i = 0; i < Count; i++)
        {
            if (_contents[i] == value)
            {
                return i;
            }
        }
        return -1;
    }

    public void Insert(int index, object value)
    {
        if ((_count + 1 <= _contents.Length) && (index < Count) && (index >= 0))
        {
            _count++;

            for (int i = Count - 1; i > index; i--)
            {
                _contents[i] = _contents[i - 1];
            }
            _contents[index] = value;
        }
    }

    public bool IsFixedSize
    {
        get
        {
            return true;
        }
    }

    public bool IsReadOnly
    {
        get
        {
            return false;
        }
    }

    public void Remove(object value)
    {
        RemoveAt(IndexOf(value));
    }

    public void RemoveAt(int index)
    {
        if ((index >= 0) && (index < Count))
        {
            for (int i = index; i < Count - 1; i++)
            {
                _contents[i] = _contents[i + 1];
            }
            _count--;
        }
    }

    public object this[int index]
    {
        get
        {
            return _contents[index];
        }
        set
        {
            _contents[index] = value;
        }
    }

    // ICollection members.

    public void CopyTo(Array array, int index)
    {
        for (int i = 0; i < Count; i++)
        {
            array.SetValue(_contents[i], index++);
        }
    }

    public int Count
    {
        get
        {
            return _count;
        }
    }

    public bool IsSynchronized
    {
        get
        {
            return false;
        }
    }

    // Return the current instance since the underlying store is not
    // publicly available.
    public object SyncRoot
    {
        get
        {
            return this;
        }
    }

    // IEnumerable Members

    public IEnumerator GetEnumerator()
    {
        // Refer to the IEnumerator documentation for an example of
        // implementing an enumerator.
        throw new NotImplementedException("The method or operation is not implemented.");
    }

    public void PrintContents()
    {
        Console.WriteLine($"List has a capacity of {_contents.Length} and currently has {_count} elements.");
        Console.Write("List contents:");
        for (int i = 0; i < Count; i++)
        {
            Console.Write($" {_contents[i]}");
        }
        Console.WriteLine();
    }
}

Public Class SimpleList
    Implements IList

    Private _contents(7) As Object
    Private _count As Integer

    Public Sub New()

        _count = 0
    End Sub

    ' IList members.
    Public Function Add(ByVal value As Object) As Integer Implements IList.Add
        If _count < _contents.Length Then
            _contents(_count) = value
            _count += 1

            Return _count - 1
        End If

        Return -1
    End Function

    Public Sub Clear() Implements IList.Clear
        _count = 0
    End Sub

    Public Function Contains(ByVal value As Object) As Boolean Implements IList.Contains
        For i As Integer = 0 To Count - 1
            If _contents(i) = value Then Return True
        Next

        Return False
    End Function

    Public Function IndexOf(ByVal value As Object) As Integer Implements IList.IndexOf
        For i As Integer = 0 To Count - 1
            If _contents(i) = value Then Return i
        Next
        Return -1
    End Function

    Public Sub Insert(ByVal index As Integer, ByVal value As Object) Implements IList.Insert

        If _count + 1 <= _contents.Length AndAlso index < Count AndAlso index >= 0 Then
            _count += 1

            For i As Integer = Count - 1 To index Step -1
                _contents(i) = _contents(i - 1)
            Next
            _contents(index) = value
        End If
    End Sub

    Public ReadOnly Property IsFixedSize() As Boolean Implements IList.IsFixedSize
        Get
            Return True
        End Get
    End Property

    Public ReadOnly Property IsReadOnly() As Boolean Implements IList.IsReadOnly
        Get
            Return False
        End Get
    End Property

    Public Sub Remove(ByVal value As Object) Implements IList.Remove
        RemoveAt(IndexOf(value))
    End Sub

    Public Sub RemoveAt(ByVal index As Integer) Implements IList.RemoveAt

        if index >= 0 AndAlso index < Count Then
            for i As Integer = index To Count - 2
                _contents(i) = _contents(i + 1)
            Next
            _count -= 1
        End If
    End Sub

    Public Property Item(ByVal index As Integer) As Object Implements IList.Item
        Get
            Return _contents(index)
        End Get

        Set(ByVal value As Object)
            _contents(index) = value
        End Set
    End Property

    ' ICollection members.
    Public Sub CopyTo(ByVal array As Array, ByVal index As Integer) Implements ICollection.CopyTo
        For i As Integer = 0 To Count - 1
            array.SetValue(_contents(i), index)
            index += 1
        Next
    End Sub

    Public ReadOnly Property Count() As Integer Implements ICollection.Count
        Get
            Return _count
        End Get
    End Property

    Public ReadOnly Property IsSynchronized() As Boolean Implements ICollection.IsSynchronized
        Get
            Return False
        End Get
    End Property

    ' Return the current instance since the underlying store is not
    ' publicly available.
    Public ReadOnly Property SyncRoot() As Object Implements ICollection.SyncRoot
        Get
            Return Me
        End Get
    End Property

    ' IEnumerable members.
    Public Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator

        ' Refer to the IEnumerator documentation for an example of
        ' implementing an enumerator.
        Throw New NotImplementedException("The method or operation is not implemented.")
    End Function

    Public Sub PrintContents()
        Console.WriteLine($"List has a capacity of {_contents.Length} and currently has {_count} elements.")
        Console.Write("List contents:")

        For i As Integer = 0 To Count - 1
            Console.Write($" {_contents(i)}")
        Next

        Console.WriteLine()
    End Sub
End Class

Keterangan

Anggota ini adalah implementasi anggota antarmuka eksplisit. Ini hanya dapat digunakan ketika instans dilemparkan SqlParameterCollection ke IList antarmuka.

Dimulai dengan .NET Framework 2.0, metode ini menggunakan objek Equals dan CompareTo metode item koleksi untuk menentukan apakah item ada. Dalam versi .NET Framework sebelumnya, penentuan ini dibuat dengan menggunakan Equals metode item dan CompareTo parameter pada objek dalam koleksi.

Lihat juga

Berlaku untuk

Contains(String)

Menentukan apakah nama parameter yang ditentukan ada di ini SqlParameterCollection.

public:
 override bool Contains(System::String ^ value);

public:
 virtual bool Contains(System::String ^ value);

public override bool Contains (string value);

public bool Contains (string value);

override this.Contains : string -> bool

abstract member Contains : string -> bool
override this.Contains : string -> bool

Public Overrides Function Contains (value As String) As Boolean

Public Function Contains (value As String) As Boolean

Parameter

value: String

Nilainya String .

Mengembalikan

Boolean

true SqlParameterCollection jika berisi nilai; jika tidak, false.

Penerapan

Contains(String)

Lihat juga

Berlaku untuk

Bagikan melalui

SqlParameterCollection.Contains Metode

Definisi

Overload

Contains(SqlParameter)

Parameter

Mengembalikan

Lihat juga

Berlaku untuk

Contains(Object)

Parameter

Mengembalikan

Penerapan

Contoh

Keterangan

Lihat juga

Berlaku untuk

Contains(String)

Parameter

Mengembalikan

Penerapan

Lihat juga

Berlaku untuk

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