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n Overloads Public Overridable Function Add(ByVal value As Object) As Integer Implements IList.Add
n Overloads Public Function Add(ByVal parameterName As String,ByVal value As Object) As OleDbParameter
n Overloads Public Function Add(ByVal value As OleDbParameter) As OleDbParameter
n Overloads Public Function Add(ByVal parameterName As String,ByVal oleDbType As OleDbType) As OleDbParameter
n Overloads Public Function Add(ByVal parameterName As String,ByVal oleDbType As OleDbType,ByVal size As Integer) As OleDbParameter
n Overloads Public Function Add(ByVal parameterName As String,ByVal oleDbType As OleDbType,ByVal size As Integer,ByVal sourceColumn As String) As OleDbParameter
示例
Public Sub CreateOleDbParamColl(myConn As OleDbConnection)
Dim myCommand As OleDbCommand = New OleDbCommand("SELECT * FROM Customers WHERE CustomerID = ?", myConn)
Dim myParamCollection As OleDbParameterCollection = myCommand.Parameters
Dim myParm As Object = New OleDbParameter("CustomerID", OleDbType.VarChar)
Dim pIndex As Integer = myParamCollection.Add(myParm)
Dim myParm As OleDbParameter = myParamCollection.Add(New OleDbParameter("CustomerID", OleDbType.VarChar))
Dim myParm As OleDbParameter = myParamCollection.Add("CustomerID", “CustomerIDValue”);
Dim myParm As OleDbParameter = myParamCollection.Add("CustomerID", OleDbType.VarChar)
Dim myParm As OleDbParameter = myParamCollection.Add("CustomerID", OleDbType.VarChar, 5)
Dim myParm As OleDbParameter = myParamCollection.Add("CustomerID", OleDbType.VarChar, 5, "CustomerID")
End Sub
示例
Public Shared Function CreateCustomerAdapter(conn As OleDbConnection) As OleDbDataAdapter
Dim da As OleDbDataAdapter = New OleDbDataAdapter()
Dim cmd As OleDbCommand
Dim parm As OleDbParameter
'''' Create the SelectCommand.
cmd = New OleDbCommand("SELECT * FROM Customers WHERE Country = @Country AND City = @City", conn)
cmd.Parameters.Add("@Country", OleDbType.VarChar, 15)
cmd.Parameters.Add("@City", OleDbType.VarChar, 15)
da.SelectCommand = cmd
'''' Create the InsertCommand.
cmd = New OleDbCommand("INSERT INTO Customers (CustomerID, CompanyName) VALUES (@CustomerID, @CompanyName)", conn)
cmd.Parameters.Add("@CustomerID", OleDbType.Char, 5, "CustomerID")
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