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提高 MSChart Toolip 的性能？

我们在 ASP.net 3.5 Web 应用程序上使用 MSChart，并注意到启用工具提示的速度明显变慢。绘制图表的性能非常缓慢。由于我使用大型数据集绘制图形。图表输出为 JPEG，总共包含 500 多个数据点。

            chart.DataSource = dv;
            chart.Series.Invalidate();
            chart.Series.SuspendUpdates();

            chart.Series["Series1"].XValueMember = "Time_Value";
            chart.Series["Series1"].YValueMembers = "Total1";
            chart.Series["Series2"].XValueMember = "Time_Value";
            chart.Series["Series2"].YValueMembers = "Total_thru";
            chart.Series["Series3"].XValueMember = "Time_Value";
            chart.Series["Series3"].YValueMembers = "Total2";
            chart.Series["Series4"].XValueMember = "Time_Value";
            chart.Series["Series4"].YValueMembers = "Total2_thruput";
            chart.Series["Series5"].XValueMember = "Time_Value";
            chart.Series["Series5"].YValueMembers = "BAWA_Total";
            chart.Series["Series5"].LegendText = "Count";
            chart.Series["Series5"].IsVisibleInLegend = true;
            chart.DataBind();

            chart.Series["Series2"].LegendText = "Throughput1";
            chart.Series["Series2"].IsVisibleInLegend = true;
            chart.Series["Series1"].LegendText = "Count1";
            chart.Series["Series1"].IsVisibleInLegend = true;
            chart.Series["Series3"].LegendText = "Count2";
            chart.Series["Series3"].IsVisibleInLegend = true;
            chart.Series["Series4"].LegendText = "Throughput2";
            chart.Series["Series4"].IsVisibleInLegend = true;

            chart.ChartAreas[0].AxisX.LabelStyle.Angle = -90;
            chart.ChartAreas[0].AxisX.LabelStyle.Font = new System.Drawing.Font("Trebuchet MS", 6.00F, System.Drawing.FontStyle.Bold);
            chart.ChartAreas[0].AxisX.Interval = 600;
            chart.ChartAreas[0].AxisX.IsStartedFromZero = true;
            chart.ChartAreas[0].AxisX.TitleFont = new System.Drawing.Font("Trebuchet MS", 10.00F, System.Drawing.FontStyle.Bold);
            chart.ChartAreas[0].AxisY.TitleFont = new System.Drawing.Font("Trebuchet MS", 10.00F, System.Drawing.FontStyle.Bold);
            chart.ChartAreas[0].AxisY2.TitleFont = new System.Drawing.Font("Trebuchet MS", 10.00F, System.Drawing.FontStyle.Bold);

            chart.Legends[0].Docking = Docking.Bottom;
            chart.Legends[0].IsDockedInsideChartArea = false;
            chart.Legends[0].TableStyle = LegendTableStyle.Wide;
            chart.Legends[0].Alignment = StringAlignment.Center;
            chart.Series[0].ToolTip = "#VALY{d} (#VALX)";
            chart.Series[1].ToolTip = "#VALY{d} (#VALX)";
            chart.Series[2].ToolTip = "#VALY{d} (#VALX)";
            chart.Series[3].ToolTip = "#VALY{d} (#VALX)";
            chart.Series[4].ToolTip = "#VALY{d} (#VALX)";
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1 回答 1

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您还没有显示工具提示的代码。工具提示也可以显示一个常量字符串。您的意思是在 Tooltip 中显示 DataPoint 的值吗？chart.Series["Series5"].XValueMember = "Time_Value";这个系列有什么用？其 YValueMember 未设置。除了问题不清楚，你能解释一下吗？

于 2013-08-01T11:07:24.603 回答