Tim,

did you have a go at duplicating this?

>I just copied your code and I am going to test this in my application to see what is happening.
>Tim
>
>>
>>I've tried it like this, but I still get the same error :(
>>
>>Here's my actual code:
>>
>>in my PolicyRider.Partial.cs:
>>
>>

        public string ValidateSumAssuredMaxMin(Guid? planPK, decimal? sumAssured)
>>        {
>>            // Get the Plan for the specified PlanPK
>>            Plan oPlan = new Plan();
>>            oPlan.GetPlanByPlanPK((Guid)planPK);
>>
>>            // Call the validate method in the Rules object
>>            return this.Rules.ValidateSumAssuredMaxMin(sumAssured, oPlan.Entity.MinSumAssured, oPlan.Entity.MaxSumAssured);
>>
>>        }

>>
>>In my PolicyRiderRules.Partial.cs:
>>
>>

        public string ValidateSumAssuredMaxMin(Decimal? sumAssured, Decimal? min, Decimal? max)
>>        {
>>            string message = null;
>>            // check that the sum assured meets the min and max sum assured requirements
>>            if (min > (Decimal)sumAssured
>>                    || max < (Decimal)sumAssured)
>>            {
>>                message = "Rider Sum Assured must be between " + min.ToString() + " and " + max.ToString();
>>                this.AddErrorProviderBrokenRule("SumAssured", message);
>>            }
>>            return message;
>>        }

>>
>>In my PolicyEdit.aspx.cs:
>>
>>

        protected void txtRiderSumAssured_TextChanged(object sender, EventArgs e)
>>        {
>>            TextBox thisTextBox = (TextBox)sender;
>>            this.oPolicyRider.Rules.ClearAll();
>>            GridViewRow gvr = (GridViewRow)thisTextBox.Parent.Parent;
>>            if (this.oPolicyRider.ValidateSumAssuredMaxMin((Guid)this.oPolicyRider.DataSet.Tables[0].Rows[gvr.RowIndex]["RiderFK"], decimal.Parse(thisTextBox.Text)) != null)
>>            {
>>                // show the message somehow
>>            }
>>
>>            this.CalculateRiderPremium(true, gvr);
>>            this.SetFocus(gvr.Cells[3].Controls[1]);
>>        }