Footer, aggregate function and frozen columns bug ?

[Thomas LEBRUN]

Hi,

When I used this code to display footer in my application:

 

 

 

private void SetFooter()
        {
            var columns = this._Xwg.Columns.Cast<GridViewDataColumn>().Where(c => c.DataType == typeof(double));
            if (columns.Any())
            {
                foreach (var column in columns)
                {
                    column.AggregateFunctions.Add(new MaxFunction
                                                      {
                                                          FunctionName = "DisplayMaxFunction",
                                                          Caption = "Max: ",
                                                          ResultFormatString = "{0:n}",
                                                          SourceField = FilterSourceField(column.Header.ToString())
                                                      });
                    column.AggregateFunctions.Add(new MinFunction
                                                      {
                                                          FunctionName = "DisplayMinFunction",
                                                          Caption = "Min: ",
                                                          ResultFormatString = "{0:n}",
                                                          SourceField = FilterSourceField(column.Header.ToString())
                                                      });
                    column.AggregateFunctions.Add(new SumFunction
                                                      {
                                                          FunctionName = "DisplaySumFunction",
                                                          Caption = "Sum: ",
                                                          ResultFormatString = "{0:n}",
                                                          SourceField = FilterSourceField(column.Header.ToString())
                                                      });
                    column.AggregateFunctions.Add(new AverageFunction
                                                      {
                                                          FunctionName = "DisplayAverageFunction",
                                                          Caption = "Average: ",
                                                          ResultFormatString = "{0:n}",
                                                          SourceField = FilterSourceField(column.Header.ToString())
                                                      });

                    _Xwg.CalculateAggregates();

                    // Create the tooltip
                    var spFunctions = new StackPanel();
                    spFunctions.Children.Add(new TextBlock { Text = string.Concat(_Xwg.AggregateResults["DisplaySumFunction"].Caption, " ", _Xwg.AggregateResults["DisplaySumFunction"].FormattedValue.ToString()) });
                    spFunctions.Children.Add(new TextBlock { Text = string.Concat(_Xwg.AggregateResults["DisplayMinFunction"].Caption, " ", _Xwg.AggregateResults["DisplayMinFunction"].FormattedValue.ToString()) });
                    spFunctions.Children.Add(new TextBlock { Text = string.Concat(_Xwg.AggregateResults["DisplayMaxFunction"].Caption, " ", _Xwg.AggregateResults["DisplayMaxFunction"].FormattedValue.ToString()) });
                    spFunctions.Children.Add(new TextBlock { Text = string.Concat(_Xwg.AggregateResults["DisplayAverageFunction"].Caption, " ", _Xwg.AggregateResults["DisplayAverageFunction"].FormattedValue.ToString()) });

                    // Create the Textblock for displaying Sum
                    var tb = new TextBlock
                                 {
                                     Text = this._Xwg.AggregateResults["DisplaySumFunction"].FormattedValue.ToString()
                                 };

                    // Set tooltip
                    ToolTipService.SetToolTip(tb, spFunctions);

                    // Set the footer
                    column.Footer = tb;

                    // TODO: Need to find a way to prevent frozen columns to display correct footer (Telerik bug ?)
                    _Xwg.FrozenColumnCount++;
                    _Xwg.FrozenColumnCount--;
                }
            }
        }

It does not work as expected. Indeed, instead of having only the sum results displayed, I have all the results, as shown here:

http://img16.imageshack.us/i/capture1l.png/

But, as soon as I move the bar for the frozen columns, the footer is correctly displayed:

http://img140.imageshack.us/i/capture2e.png/


Is it a bug ? Any workaround ?


Thanks !

[Thomas LEBRUN]

Nobody got an idea ?


Thanks !

[Milan]

Hi Thomas LEBRUN,

Apparantly there is a problem with the Footer property when it is set in code-behind. We have logged the issue and we will fix it as sonn as possible. Meanwhile you could try defining your aggregates and footer purely in XAML:

<telerik:GridViewDataColumn Header="Number" DataMemberBinding="{Binding Number}">
    <telerik:GridViewDataColumn.AggregateFunctions>
        <data:SumFunction Caption="Sum: " ResultFormatString="{}{0:c}" SourceField="Number" />
        <data:AverageFunction Caption="Average: " ResultFormatString="{}{0:c}" SourceField="Number" />
    </telerik:GridViewDataColumn.AggregateFunctions>
    <telerik:GridViewDataColumn.Footer>
        <StackPanel Orientation="Vertical" Margin="5,0">
            <!-- the number in brackets indicates which function result will be displayed -->
            <!-- Path=[1] will display the average result -->
            <TextBlock Text="{Binding Path=[1].FormattedValue}"/>
        </StackPanel>
    </telerik:GridViewDataColumn.Footer>
</telerik:GridViewDataColumn>

Your Telerik points have been updated.

Best wishes,
Milan
the Telerik team

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[Thomas LEBRUN]

Hi Milan,

Thanks for your response. I need to use only ocde behind so I'll need to wait for any new version correcting this bug.


Thanks !