OleDbParameterCollection Classe

Definição

public ref class OleDbParameterCollection sealed : MarshalByRefObject, System::Collections::IList, System::Data::IDataParameterCollection

public ref class OleDbParameterCollection sealed : System::Data::Common::DbParameterCollection

[System.ComponentModel.ListBindable(false)]
public sealed class OleDbParameterCollection : MarshalByRefObject, System.Collections.IList, System.Data.IDataParameterCollection

[System.ComponentModel.ListBindable(false)]
public sealed class OleDbParameterCollection : System.Data.Common.DbParameterCollection

[<System.ComponentModel.ListBindable(false)>]
type OleDbParameterCollection = class
    inherit MarshalByRefObject
    interface IDataParameterCollection
    interface IList
    interface ICollection
    interface IEnumerable

[<System.ComponentModel.ListBindable(false)>]
type OleDbParameterCollection = class
    inherit DbParameterCollection

Public NotInheritable Class OleDbParameterCollection
Inherits MarshalByRefObject
Implements IDataParameterCollection, IList

Public NotInheritable Class OleDbParameterCollection
Inherits DbParameterCollection

Herança

Object

MarshalByRefObject

OleDbParameterCollection

Herança

Object

MarshalByRefObject

DbParameterCollection

OleDbParameterCollection

Atributos

ListBindableAttribute

Implementações

ICollection IEnumerable IList IDataParameterCollection

Exemplos

O exemplo seguinte cria múltiplas instâncias de OleDbParameter através da OleDbParameterCollection coleção dentro do OleDbDataAdapter. Estes parâmetros são usados para selecionar dados dentro da fonte de dados e colocar os dados no DataSet. Este exemplo assume que a DataSet e an OleDbDataAdapter já foram criados com o esquema, comandos e ligação apropriados.

public DataSet GetDataSetFromAdapter(
    DataSet dataSet, string connectionString, string queryString)
{
    using (OleDbConnection connection =
               new OleDbConnection(connectionString))
    {
        OleDbDataAdapter adapter =
            new OleDbDataAdapter(queryString, connection);

        // Set the parameters.
        adapter.SelectCommand.Parameters.Add(
            "@CategoryName", OleDbType.VarChar, 80).Value = "toasters";
        adapter.SelectCommand.Parameters.Add(
            "@SerialNum", OleDbType.Integer).Value = 239;

        // Open the connection and fill the DataSet.
        try
        {
            connection.Open();
            adapter.Fill(dataSet);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
    return dataSet;
}

Public Function GetDataSetFromAdapter( _
    ByVal dataSet As DataSet, ByVal connectionString As String, _
    ByVal queryString As String) As DataSet

    Using connection As New OleDbConnection(connectionString)
        Dim adapter As New OleDbDataAdapter(queryString, connection)

        ' Set the parameters.
        adapter.SelectCommand.Parameters.Add( _
            "@CategoryName", OleDbType.VarChar, 80).Value = "toasters"
        adapter.SelectCommand.Parameters.Add( _
         "@SerialNum", OleDbType.Integer).Value = 239

        ' Open the connection and fill the DataSet.
        Try
            connection.Open()
            adapter.Fill(dataSet)
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using

    Return dataSet
End Function

Observações

O número de parâmetros na coleção deve ser igual ao número de marcadores de parâmetros dentro do texto do comando, caso contrário o .NET Framework Data Provider para OLE DB pode gerar um erro.

Ver também

• Trabalhar com Comandos
• Utilização de Parâmetros com um DataAdapter