How to restrict a custom databound control to accept my custom collection as datasource?

I have created a custom databound control as per my requirements and now I want to restrict this control should take custom collection as datasource instead of every collection which is impe开发者_如何转开发lmented IEnuberable interface.

Is it possible to restrict? If yes, how to restrict this?

Thanks in advance..

Can you put a guard in the setter of DataSource ?

public object DataSource
{
  get
  {
    return ....;
  }
  set
  {
    if (value is typeof(myCollection) ) 
        this.dataSource = value;
    else
       throw InvalidOperationException("DataSource must by {0}" typeof(myCollection).FullName;
  }
}

One of the simplest way is to put the type check in Data Source related properties. For example, @Preet has already pointed out overriding DataSource setter. Only issue with the approach, that you need to also take care of a situation where the control is bound using DataSourceID.

I will rather recommend putting a type check in DataBoundControl.PerformDataBinding method - this is of course assuming that you have inherited from DataBoundControl class. This method gets called so that derived class can actually bound the data - so it stands as a good candidate. Another equivalent is to put check in OnDataBind.

Yet another way is to expose specific collection as a property to accept the data. In such case, you should avoid exposing DataSource related properties.