Hi all !

I have created a method (see below) that associates a value list to a grid (WPF 2008, Vol. 2, .Net 2.0, VS 2005 SP1).

Without changing any code line, this method throws sometimes at runtime the exception:

"Key not found Parametername: key"

in code line

band.Columns[displayColumn].Style ...

 Also the object array

  Object[ colObj2 = band.Columns.All;

 is sometimes empty, although debbuging band.Columns.All delivers an non empty array.

 But when exchanging the code line (in the method)

UltraGridBand band = grid.Rows.Band;  

 by

UltraGridBand band = grid.DisplayLayout.Bands[0];

 the exception will never thrown !

 In my opinion a bug.

Regards,

Claus

        /// <summary>
        /// Creates a value list for the display column of a specified grid.
        /// </summary>
        /// <param name="grid">the grid</param>
        /// <param name="vlistName">the name of the value list to be created</param>
        /// <param name="displayColumn"></param>
        /// <param name="dataColumn"></param>
        /// <param name="source">the datasource which items should be filled into the value list</param>
        /// <param name="addToColumn"></param>
        private bool CreateValueListForOvertakeableColumns(ref UltraGrid grid, String vlistName, String displayColumn, String dataColumn, UltraDataSource source, bool addToColumn) {
            ValueList       vlist = null;
            bool     vlistCreated = false;

            if (grid != null && source != null) {
                try {
                    UltraGridBand band = grid.Rows.Band;               
                    String key = grid.Rows.Band.Key;         

       
                    Object[ colObj2 = band.Columns.All;         <- in some runtime cases the object array is empty !

                 
                    bool r1 = !(grid.DisplayLayout.ValueLists.Exists(vlistName));

                    if (r1) {
                        vlist = new ValueList();
                        vlist.Key = vlistName;
                        grid.DisplayLayout.ValueLists.Add(vlist);

                        this.FillValueList(
                            this.columnNamesDataSource,
                            vlist,
                            DataSourceSchemaColumnNames.COLUMN_NAME,
                            DataSourceSchemaColumnNames.COLUMN_INDEX
                        );

                        this.AddEmptyRowToValueList(vlist, this.FREE_COLUMN_EMPTY_ROW, -1);

                     
                        if (addToColumn) {
                            band.Columns[displayColumn].Style            = Infragistics.Win.UltraWinGrid.ColumnStyle.DropDownValidate;
                            band.Columns[displayColumn].ValueList        = vlist;
                            band.Columns[displayColumn].AutoCompleteMode = Infragistics.Win.AutoCompleteMode.SuggestAppend;
                            vlistCreated = true;
                        }

                    }
                } catch (Exception e) {
                    this.Logger.Error(ItemCartException.CANT_BUILD_OVERTAKEABLE_VALUE_LIST + e.Message);
                }
            }
            return vlistCreated;
        }