Populate a datagridview with a query that has dynamic columns

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C#

ASP.NET

I have a query that uses a pivot table which populates columns dynamically depending what values are passed to the query. The results from the query has the departmen for rows and CallType for the dynamic columns.

I want to simply want to put the results returned into a datagrid, but unable to because the column name can change.

Please can anyone advise?
Using C# asp.net

What I have tried:

foreach (DataRow dr in dt.Rows)
                   {
                       CallEntity callSummaryEntity = new CallEntity();
                       callSummaryEntity.Department = (string.IsNullOrEmpty(dr["DEPTNAME"].ToString())) ? string.Empty : dr["DEPTNAME"].ToString();
                       //callSummaryEntity.CallType = (string.IsNullOrEmpty(dr["CallType"].ToString())) ? string.Empty : dr["CallType"].ToString();
                       objects.Add(callSummaryEntity);

                   }