The syntax about IDataReader? [modified]

[cateyes99]

In the below code snippet, I know it does retrieve value of those specified columns from the Deals table, but look at dataReader("name"), what syntax is this? dataReader is declared as type of interface IDataReader, how can we use it in a way like calling a function? At the first glance, I think it's an overloaded operator - function form "()", but after checking with some documentation, in VB.Net, this operator isn't on the allowed operators list to be overload. So would anyone tell me what syntax is dataReader("name"). Many thanks.

Imports Microsoft.Practices.EnterpriseLibrary.Data
Imports Microsoft.Practices.EnterpriseLibrary.Data.Sql

...

    Dim lubc As New LookupBaseCollection(GetType(SectypeCommon))
    Dim sqlCommand As String = "SELECT \* From Deals"
    Dim dbCommandWrapper As DBCommandWrapper = Me.database.GetSqlStringCommandWrapper(sqlCommand)
    dbCommandWrapper.CommandTimeout = Me.database.GetConnection().ConnectionTimeout

    Dim dataReader As IDataReader = Me.database.ExecuteReader(dbCommandWrapper)

    While (dataReader.Read())
        Dim sc As New SectypeCommon(dataReader("transtype").ToString())
        sc.Name = dataReader("name")
        sc.TheKey = dataReader("thekey")
        sc.ShortName = dataReader("code")
        ...
    End While

modified on Wednesday, March 30, 2011 10:16 PM

[TwoFaced]

dataReader("name") is the short version of dataReader.Item("name"). You can do this because the property 'Item' is the default property.

[cateyes99]

Thanks very much. I didn't know that before.