Accessing the object/row being edited in Dynamic Data

I'm modifying the "Edit.aspx" default page template used by ASP.NET Dynamic Data and adding some additional controls. I know that I can find the type of object being edited by looking at DetailsDataSource.GetTable().EntityType, but how can I see the actual object itself? Also, can I change the properties of the object and tell the data context to submit those changes?

From stackoverflow

• Hi,

  Maybe you have found a solution already, however I'd like to share my expresience on this.

  It turned out to be a great pita, but I've managed to obtain the editing row. I had to extract the DetailsDataSource WhereParameters and then create a query in runtime.

  The code below works for tables with a single primary key. If you have compound keys, I guess, it will require modifications:

  Parameter param = null;
  foreach(object item in (DetailsDataSource.WhereParameters[0] as DynamicQueryStringParameter).GetWhereParameters(DetailsDataSource)) {
      param = (Parameter)item;
      break;
  }
  
  IQueryable query = DetailsDataSource.GetTable().GetQuery();
  ParameterExpression lambdaArgument = Expression.Parameter(query.ElementType, "");
  object paramValue = Convert.ChangeType(param.DefaultValue, param.Type);
  Expression compareExpr = Expression.Equal(
      Expression.Property(lambdaArgument, param.Name),
      Expression.Constant(paramValue)
  );
  Expression lambda = Expression.Lambda(compareExpr, lambdaArgument);
  Expression filteredQuery = Expression.Call(typeof(Queryable), "Where", new Type[] { query.ElementType }, query.Expression, lambda);
  var WANTED = query.Provider.CreateQuery(filteredQuery).Cast<object>().FirstOrDefault<object>();
  

• If it's a DD object you may be able to use FieldTemplateUserControl.FindFieldTemplate(controlId). Then if you need to you can cast it as an ITextControl to manipulate data.

  Otherwise, try using this extension method to find the child control:

      public static T FindControl<T>(this Control startingControl, string id) where T : Control
      {
          T found = startingControl.FindControl(id) as T;
  
          if (found == null)
          {
              found = FindChildControl<T>(startingControl, id);
          }
  
          return found;
      }