“Both DataSource and DataSourceID are defined” error using ASP.NET GridView

Question

\"Both DataSource and DataSourceID are defined on \'grdCommunication\'. Remove one definition.\"

I just got this error today, the code has been working until this after

Answer 1

tslib is right, don't do: grdCommunication.DataSourceID = null; or the string.Empty version. You only use the DataSourceID if you're using a SqlDataSource or ObjectDataSource control for your binding.

It's called "declarative" binding because you're using "declared" controls from on your page. Binding to controls does not require a call to the DataBind() method.

Because you're DataBinding manually (calling grd.DataBind()) you only set the DataSourrce and then call DataBind().