OleDbParameterCollection Klass

Definition

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

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

public sealed class OleDbParameterCollection : 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

type OleDbParameterCollection = class
    inherit 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 DbParameterCollection

Public NotInheritable Class OleDbParameterCollection
Inherits MarshalByRefObject
Implements IDataParameterCollection, IList

Arv

Object

DbParameterCollection

OleDbParameterCollection

Arv

Object

MarshalByRefObject

DbParameterCollection

OleDbParameterCollection

Arv

Object

MarshalByRefObject

OleDbParameterCollection

Attribut

ListBindableAttribute

Implementeringar

ICollection IEnumerable IList IDataParameterCollection

Exempel

I följande exempel skapas flera instanser av OleDbParameter via OleDbParameterCollection samlingen i OleDbDataAdapter. Dessa parametrar används för att välja data i datakällan och placera data i DataSet. Det här exemplet förutsätter att en DataSet och en OleDbDataAdapter redan har skapats med lämpligt schema, kommandon och anslutning.

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

Kommentarer

Antalet parametrar i samlingen måste vara lika med antalet parameterplatshållare i kommandotexten, annars kan .NET Framework-Data Provider för OLE DB generera ett fel.

Se även

• Arbeta med kommandon
• Använda parametrar med en DataAdapter