I did the delete from the BO and that worked (except that when the user then presses the Cancel button the row has still been deleted). So how do I get this to work properly?

>Hi Tim,
>
>I could try as an experiment, but I don't want it to be deleted from the actual data until the user presses the save button.
>
>>Hi Frank,
>>
>>Instead of deleting the row from the dataset can you try asking the business object to delete it instead?
>>

>>this.oPolicyRider.Delete(dsPolicyRider, e.RowIndex);
>>

>>
>>>Hi,
>>>
>>>I have a page that is used for editing a pretty standard 1 to many relationship between tables.
>>>
>>>The many side is edited through a GridView. When a row gets deleted from this GridView I need to recalculate something on the 1 side of the relatoinship. This is my code from the grdRiders_RowDeleting method:
>>>
>>>

        protected void grdRiders_RowDeleting(object sender, GridViewDeleteEventArgs e)
>>>        {
>>>            DataSet dsPolicyRider = (DataSet)Session["dsPolicyRider"];
>>>            dsPolicyRider.Tables[0].Rows[e.RowIndex].Delete();  //(dsPolicyRider, e.RowIndex);
>>>            this.BindControl(this.grdRiders);
>>>            this.CalculatePremium(true);
>>>        }

>>>
>>>This apparently works as the row is removed from the GridView, but then when I try to save this change I get this error:
>>>
>>>

Deleted row information cannot be accessed through the row. 
>>>Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
>>>
>>>Exception Details: System.Data.DeletedRowInaccessibleException: Deleted row information cannot be accessed through the row.
>>>
>>>Source Error: 
>>>
>>>Line 67: 			{
>>>Line 68: 				if (this.Row != null)
>>>Line 69: 					return (Guid)mmType.GetNonNullableDbValue(this.Row["PolicyRiderPK"], "System.Guid");
>>>Line 70: 				else
>>>Line 71: 					return this._policyRiderPK;
>>>
>>>
>>>Source File: C:\Development\Mere Mortals .NET Framework 2008\SamaanSystems\IAS.Business\PolicyRider\PolicyRiderEntity.cs    Line: 69 
>>>
>>>Stack Trace: 
>>>
>>>[DeletedRowInaccessibleException: Deleted row information cannot be accessed through the row.]
>>>   System.Data.DataRow.GetDefaultRecord() +4814901
>>>   System.Data.DataRow.get_Item(String columnName) +22
>>>   SamaanSystems.IAS.Business.PolicyRiderEntity.get_PolicyRiderPK() in C:\Development\Mere Mortals .NET Framework 2008\SamaanSystems\IAS.Business\PolicyRider\PolicyRiderEntity.cs:69
>>>
>>>[TargetInvocationException: Exception has been thrown by the target of an invocation.]
>>>   System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +0
>>>   System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +71
>>>   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +350
>>>   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +29
>>>   System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) +53
>>>   System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) +20
>>>   OakLeaf.MM.Main.Collections.mmPropertyComparer`1.GetPropertyValue(Object objRef, String propertyName) +87
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.GetPrimaryKeyValue(EntityType entity) +174
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.CallStateChange(mmBusinessState bizState, EntityType entity) +50
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.PreSaveEntityListProcessing(mmBindingList`1 entityList) +446
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.PreSaveProcessing() +64
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.CheckRules(mmBusinessObjectGeneric`1 businessObject, mmBindingList`1 entityList) +802
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.CheckRules() +71
>>>   OakLeaf.MM.Main.Business.mmBusinessObjectGeneric`1.CheckRules(mmBusinessObject businessObject, DataSet ds, String tableName) +97
>>>   OakLeaf.MM.Main.Business.mmBusinessObject.SaveDataSet(DataSet ds, String tableName, String databaseKey, IDbDataAdapter dbAdapter) +410
>>>   OakLeaf.MM.Main.Business.mmBusinessObject.SaveDataSet(DataSet ds, String tableName, String databaseKey) +53
>>>   OakLeaf.MM.Main.Business.mmBusinessObject.SaveDataSet(DataSet ds, String tableName) +83
>>>   OakLeaf.MM.Main.Business.mmBusinessObject.SaveDataSet(DataSet ds) +74
>>>   OakLeaf.MM.Main.Web.UI.mmBusinessWebPage.Save(mmBusinessObject bizObj, DataSet ds, String tableName) +187
>>>   SamaanSystems.IAS.Web.PolicyEdit.btnSave_Click(Object sender, EventArgs e) in C:\Development\Mere Mortals .NET Framework 2008\SamaanSystems\IAS.Web\PolicyEdit.aspx.cs:892
>>>   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
>>>   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
>>>   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
>>>   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
>>>   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
>>>   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565
>>>
>>>
>>>Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3614

>>>
>>>If I comment out the CalculatePremium call, then I don't get the error.
>>>
>>>Can someone explain what is going on here and what to do to fix it, please?