我有使用动态xtracharts 的报告页面。为了动态创建xtracharts，我使用了XtraReport'BeforePrint事件。但是XtraChart生成了重复的s。从一个场景来看，预期的图表数量为 2，但生成了 24 个图表（创建了 12 个预期图表的副本）。
这是我class的报告
public class SystemReport : DevExpress.XtraReports.UI.XtraReport
{
private DevExpress.XtraReports.UI.DetailBand Detail;
private DevExpress.XtraReports.UI.PageFooterBand PageFooter;
private ReportHeaderBand ReportHeader;
...
public SystemReport(List<SystemLog> logs)
{
InitializeComponent();
Detail.Report.DataSource = logs
}
protected override void Dispose(bool disposing)
{
...
}
#region Designer generated code
private void InitializeComponent()
{
this.Detail = new DevExpress.XtraReports.UI.DetailBand();
this.PageFooter = new DevExpress.XtraReports.UI.PageFooterBand();
this.xrPageInfo1 = new DevExpress.XtraReports.UI.XRPageInfo();
this.ReportHeader = new DevExpress.XtraReports.UI.ReportHeaderBand();
this.xrLblSystemReport = new DevExpress.XtraReports.UI.XRLabel();
((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
//
// Detail
//
this.Detail.Name = "Detail";
this.Detail.Padding = new DevExpress.XtraPrinting.PaddingInfo(0, 0, 0, 0, 100F);
this.Detail.TextAlignment = DevExpress.XtraPrinting.TextAlignment.TopLeft;
//
// PageFooter
//
this.PageFooter.Controls.AddRange(new DevExpress.XtraReports.UI.XRControl[] {
this.xrPageInfo1});
this.PageFooter.HeightF = 25.83332F;
this.PageFooter.Name = "PageFooter";
this.PageFooter.Padding = new DevExpress.XtraPrinting.PaddingInfo(0, 0, 0, 0, 100F);
this.PageFooter.TextAlignment = DevExpress.XtraPrinting.TextAlignment.TopLeft;
//
// xrPageInfo1
//
this.xrPageInfo1.ForeColor = System.Drawing.Color.Gray;
this.xrPageInfo1.Format = "Page {0} of {1}";
this.xrPageInfo1.LocationFloat = new DevExpress.Utils.PointFloat(388.7917F, 0F);
this.xrPageInfo1.Name = "xrPageInfo1";
this.xrPageInfo1.Padding = new DevExpress.XtraPrinting.PaddingInfo(2, 2, 0, 0, 100F);
this.xrPageInfo1.SizeF = new System.Drawing.SizeF(120F, 25F);
this.xrPageInfo1.StylePriority.UseForeColor = false;
this.xrPageInfo1.StylePriority.UseTextAlignment = false;
this.xrPageInfo1.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
//
// ReportHeader
//
this.ReportHeader.Controls.AddRange(new DevExpress.XtraReports.UI.XRControl[] {
this.xrLblSystemReport});
this.ReportHeader.HeightF = 107.0417F;
this.ReportHeader.Name = "ReportHeader";
this.ReportHeader.Padding = new DevExpress.XtraPrinting.PaddingInfo(0, 0, 0, 0, 100F);
this.ReportHeader.TextAlignment = DevExpress.XtraPrinting.TextAlignment.TopLeft;
//
// xrLblSystemReport
//
this.xrLblSystemReport.Font = new System.Drawing.Font("Arial", 9.75F, System.Drawing.FontStyle.Bold);
this.xrLblSystemReport.LocationFloat = new DevExpress.Utils.PointFloat(363.3333F, 10.00001F);
this.xrLblSystemReport.Name = "xrLblSystemReport";
this.xrLblSystemReport.Padding = new DevExpress.XtraPrinting.PaddingInfo(2, 2, 0, 0, 100F);
this.xrLblSystemReport.SizeF = new System.Drawing.SizeF(175F, 25F);
this.xrLblSystemReport.Text = "System Report";
this.xrLblSystemReport.TextAlignment = DevExpress.XtraPrinting.TextAlignment.TopCenter;
//
// SystemReport
//
this.Bands.AddRange(new DevExpress.XtraReports.UI.Band[] {
this.Detail,
this.PageFooter,
this.ReportHeader});
this.Font = new System.Drawing.Font("Arial", 9.75F);
this.ForeColor = System.Drawing.Color.Gray;
this.Landscape = true;
this.PageHeight = 850;
this.PageWidth = 1100;
this.Version = "11.2";
this.BeforePrint += new System.Drawing.Printing.PrintEventHandler(Report_BeforePrint);
((System.ComponentModel.ISupportInitialize)(this)).EndInit();
}
private void Report_BeforePrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
DetailBand detail = (DetailBand)((XtraReport)sender).Bands[BandKind.Detail];
List<SystemLog> logs = (List<SystemLog>)detail.Report.DataSource;
int chartQuantity = GetChartQuantity(logs);
PopulateDetailWithCharts(detail, chartQuantity);
PopulateDetailWithValues(logs, detail, chartQuantity);
}
#endregion
private int GetChartQuantity(List<SystemLog> logs)
{
return logs.Count / 15 + (logs.Count % 15 > decimal.Zero ? 1 : 0);
}
private void PopulateDetailWithCharts(DetailBand detail, int chartQuantity)
{
for (int i = 0; i < chartQuantity; i++)
{
if (detail.FindControl(string.Format("xrChart{0}", i), false) == null)
{
XRChart chart = GetChart(i);
detail.Controls.Add(chart);
chart.Location = new Point(0, 300 * (i));
}
}
}
private XRChart GetChart(int i)
{
XRChart chart = new XRChart();
chart.AppearanceNameSerializable = "Gray";
chart.BackColor = System.Drawing.Color.Transparent;
chart.BorderColor = System.Drawing.SystemColors.ControlText;
chart.Borders = DevExpress.XtraPrinting.BorderSide.None;
chart.ImageType = DevExpress.XtraReports.UI.ChartImageType.Bitmap;
chart.Name = string.Format("xrChart{0}", i);
chart.PaletteBaseColorNumber = 11;
chart.PaletteName = "Nature Colors";
chart.SizeF = new System.Drawing.SizeF(852.4167F, 300F);
chart.TextAlignment = DevExpress.XtraPrinting.TextAlignment.TopLeft;
chart.Legend.Visible = false;
return chart;
}
private void PopulateDetailWithValues(List<SystemLog> logs, DetailBand detail, int chartQuantity)
{
for (int i = 0; i < chartQuantity; i++)
{
XRChart chart = (XRChart)detail.FindControl(string.Format("xrChart{0}", i), false);
chart.DataSource = logs.SkipWhile((log, index) => index < i * 15).TakeWhile((log, index) => index < i + 15).ToList();
InitializeChartValues(chart);
}
}
private void InitializeChartValues(XRChart chart)
{
Series salesSeries = new Series();
salesSeries.ArgumentDataMember = "DateTime";
salesSeries.ValueDataMembers.AddRange(new string[] { "Quantity" });
salesSeries.Name = "System Log Quantity";
chart.Series.AddRange(new Series[] { salesSeries });
XYDiagram diagram = (XYDiagram)chart.Diagram;
diagram.AxisY.Title.Text = "Quantity of System Logs";
diagram.AxisX.Title.Text = "Date of System Logs";
diagram.AxisY.Title.Visible = true;
diagram.AxisX.Title.Visible = true;
diagram.AxisX.Label.Angle = -30;
}
}
我在我的代码上没有看到任何逻辑错误。也许有一些我不理解的行为。希望任何人都可以帮助我。非常感谢。