>>>>Hi,
>>>>
>>>>I'm using Mere Mortals .NET 3.6 (not sure if that matters here or not).
>>>>
>>>>I've got an aspx page showing a header record and a gridview with child records displayed. I am using MM.Net's BOs but I think technically the gridview is bound to a dataset. When a value changes at the header level I need to recalculate some stuff in the child records and refresh the gridview. So I go through each datarow in the gridview's data set, recalculate one of the fields, then save the dataset to a session variable and do a GridView.DataBind().
>>>>
>>>>This does NOT show the newly calculated values, in fact the gridview disappears from the form completely.
>>>>
>>>>What am I doing wrong?
>>>
>>>What is the code you're using in the Load method of the ASP.NET form? Are you checking IsPostBack status to run your code? Also, are you saving the DS into a session variable or re-build it?
>>
>>Yes I check IsPostBack:
>>
>>

            if (IsPostBack)
>>            {
>>                this.SetCurrentPolicy();
>>            }

>>
>>the dataset is saved to a session variable and SetCurrentPolicy has this code in it:
>>
>>

                if (Session["dsPolicyRider"] != null)
>>                {
>>                    DataSet dsPolicyRider = (DataSet)Session["dsPolicyRider"];
>>                    this.oPolicyRider.SetCurrentDataSet(dsPolicyRider);
>>                }

>
>What is this.oPolicyRider - is it a BO? Should you somehow re-bind the grid after setting the DataSet?

Yes, it's a BO. I think the MM.NET handles the re-binding, but how do I do that manually? GridView.DataBind()? If so I've tried that and it doesn't work.