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Fri, May 22 2015 10:15 PM | Permanent Link |
StewCam | I have a dataset loaded to a grid but am struggling with correct usage thereafter. Here is some code using EWB 1.05 b3:
procedure TFormMain.FormMainCreate(Sender: TObject); var DatCol: TDataColumn; begin DS.Close; DS.Columns.Clear; DatCol := DS.Columns.Add; DatCol.Name := 'id'; DatCol.DataType:=dtInteger; DatCol := DS.Columns.Add; DatCol.Name := 'name'; DatCol.DataType:=dtString; DatCol.Length:=255; DS.Open; DS.Params.Clear; DS.Params.Add('id=all'); Database.BaseUrl := 'load.php'; Database.Load(DS); end; procedure TFormMain.BtnFindClick(Sender: TObject); begin with DS do begin Columns['name'].SortDirection := sdAscending; SortCaseInsensitive := True; Sort; InitFind; Columns['name'].AsString := 'Fred'; if Find(False,True) then ShowMessage('Not found') else ShowMessage('Found'); end; end; When I click the Find button, grid data is sorted but then the find term 'Fred' is inserted into the name column in a new row at the top of the grid. There is also an error message: "Unable to get property 'tdatavalue_fmodified' of undefined or null reference Line 3605". I presume I am overlooking something simple. |
Sat, May 23 2015 9:35 AM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. ![]() | << When I click the Find button, grid data is sorted but then the find term 'Fred' is inserted into the name column in a new row at the top of the grid. >> This is normal - finds are handled in-line as a "new" row, so they'll cause dataset changes in any data-bound controls like a grid. If you don't want this behavior, then you can just bracket the find operation with a: MyDataSet.DisableControls; try // Find finally MyDataSet.EnableControls; end; << There is also an error message: "Unable to get property 'tdatavalue_fmodified' of undefined or null reference Line 3605". I presume I am overlooking something simple. >> Can you send me (timyoung@elevatesoft.com) what you're using to get that error ? I'll have to look into this further, since it appears to be a bug. Thanks, Tim Young Elevate Software www.elevatesoft.com |
Tue, May 26 2015 12:47 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. ![]() | Per email, the issue was with a double-column-add, thus one of the columns
was missing a data type. I've added fixes for EWB 1 and 2 that catch this at dataset open and issue an exception, which is clearer than what was occurring. Tim Young Elevate Software www.elevatesoft.com |
Tue, May 26 2015 6:02 PM | Permanent Link |
StewCam | Thanks. Catching the error will be a useful addition but mea culpa - I should have picked it up.
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