XRChart.CustomizeStackedBarTotalLabel Event

Occurs before a stacked bar total label is painted.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v19.1.dll

NuGet Packages: DevExpress.Reporting.Core, DevExpress.WindowsDesktop.Core

Declaration

C#

public event CustomizeStackedBarTotalLabelEventHandler CustomizeStackedBarTotalLabel

VB.NET

Public Event CustomizeStackedBarTotalLabel As CustomizeStackedBarTotalLabelEventHandler

Event Data

The CustomizeStackedBarTotalLabel event's data class is CustomizeStackedBarTotalLabelEventArgs. The following properties provide information specific to this event:

Property	Description
Text	Gets or sets the total label text.
TextColor	Gets or sets the total label’s text color.
TotalValue	Returns the total label value.

Remarks

Handle this event to customize the text in stacked bar total labels:

• Specify the label text in the CustomizeStackedBarTotalLabelEventArgs.Text property.
  A label displays the point value (the CustomizeStackedBarTotalLabelEventArgs.TotalValue) by default. Changes to the Text property value do not affect the TotalValue.
• Specify the text color in the CustomizeStackedBarTotalLabelEventArgs.TextColor property.
• Use the CustomizeStackedBarTotalLabelEventArgs.TotalValue property to obtain the point value.
  A label displays this value if you do not change the Text property value.

Tip

You can use this event to conditionally customize a stacked bar total label’s text. See the code sample below for details.

Refer to the Total Labels topic for information on total labels.

Example

The code sample below creates a stacked bar chart, shows total labels, and customizes the label text.

C#

using DevExpress.XtraCharts;
using System.IO;
using System.Drawing;
using DevExpress.Data.Filtering;
using DevExpress.XtraPrinting;
// ...
// Create a chart instance.
XRChart chart = new XRChart();
// Create a chart parameter and bind it to the OrderID field. Prepend the field name with the data member name.
chart.Parameters.Add(new XRControlParameter("ChartOrderID", null, "OrderedProducts.OrderID"));
// Create a chart series that displays products' discounted prices.
Series series1 = new Series("Series1", ViewType.StackedBar);
series1.ArgumentDataMember = "OrderedProducts.ProductName";
series1.ValueDataMembers.AddRange(new string[] { "Products.DiscountedPrice" });
// Display products from a specific order only.
series1.FilterString = "Products.OrderID = ?ChartOrderID";
// Create a chart series that displays products' full prices.
Series series2 = new Series("Series2", ViewType.StackedBar);
series2.ArgumentDataMember = "OrderedProducts.ProductName";
series2.ValueDataMembers.AddRange(new string[] { "Products.UnitPrice" });
// Apply the same filter as for the first series.
series2.FilterString = "Products.OrderID = ?ChartOrderID";
// Add the series to the chart.
chart.Series.AddRange(new Series[] {series1, series2});
// Make the total label visible.
((StackedBarSeriesView)series1.View).Pane.StackedBarTotalLabel.Visible = true;
// Add the CustomizeStackedBarTotalLabel event handler.
chart.CustomizeStackedBarTotalLabel += chart_CustomizeStackedBarTotalLabel;
// ...
private void chart_CustomizeStackedBarTotalLabel(object sender, CustomizeStackedBarTotalLabelEventArgs e) {
    // Apply the currency format to the label text.
    e.Text = string.Format("{0:c2}", e.TotalValue);
    // Set the total label's text color to red on prices greater than or equal to 100.
    if(e.TotalValue>=100)
        e.TextColor = Color.Red;
}

VB.NET

Imports DevExpress.XtraCharts
Imports System.IO
Imports System.Drawing
Imports DevExpress.Data.Filtering
Imports DevExpress.XtraPrinting
' ...
' Create a chart instance.
Private chart As New XRChart()
' Create a chart parameter and bind it to the OrderID field. Prepend the field name with the data member name.
chart.Parameters.Add(New XRControlParameter("ChartOrderID", Nothing, "OrderedProducts.OrderID"))
' Create a chart series that displays products' discounted prices.
Dim series1 As New Series("Series1", ViewType.StackedBar)
series1.ArgumentDataMember = "OrderedProducts.ProductName"
series1.ValueDataMembers.AddRange(New String() { "Products.DiscountedPrice" })
' Display products from a specific order only.
series1.FilterString = "Products.OrderID = ?ChartOrderID"
' Create a chart series that displays products' full prices.
Dim series2 As New Series("Series2", ViewType.StackedBar)
series2.ArgumentDataMember = "OrderedProducts.ProductName"
series2.ValueDataMembers.AddRange(New String() { "Products.UnitPrice" })
' Apply the same filter as for the first series.
series2.FilterString = "Products.OrderID = ?ChartOrderID"
' Add the series to the chart.
chart.Series.AddRange(New Series() {series1, series2})
' Make the total label visible.
CType(series1.View, StackedBarSeriesView).Pane.StackedBarTotalLabel.Visible = True
' Add the CustomizeStackedBarTotalLabel event handler.
AddHandler chart.CustomizeStackedBarTotalLabel, AddressOf chart_CustomizeStackedBarTotalLabel
' ...
private void chart_CustomizeStackedBarTotalLabel(Object sender, CustomizeStackedBarTotalLabelEventArgs e)
    ' Apply the currency format to the label text.
    e.Text = String.Format("{0:c2}", e.TotalValue)
    ' Set the total label's text color to red on prices greater than or equal to 100.
    If e.TotalValue>=100 Then
        e.TextColor = Color.Red
    End If