asp.net – 使用Microsoft Chart控件在图表上标记

发布时间：2020-12-16 07:43:30 所属栏目：asp.Net 来源：网络整理

导读：我正在使用Microsoft Chart控件创建一个3d图表.这是图像： alt text http://www.highoncoding.com/articleimages/bar_graph.png 我想在每个条形图的顶部显示该点.对于条形图顶部的考试1,它应该显示2(如2分)等. 这是代码： private void BindData() { var exa

我正在使用Microsoft Chart控件创建一个3d图表.这是图像：

alt text http://www.highoncoding.com/articleimages/bar_graph.png

我想在每个条形图的顶部显示该点.对于条形图顶部的考试1,它应该显示2(如2分)等.

这是代码：

private void BindData() {

            var exams = new List<Exam>()
            {
                new Exam() { Name = "Exam 1",Point = 10 },new Exam() { Name = "Exam 2",Point = 12 },new Exam() { Name = "Exam 3",Point = 15 },new Exam() { Name = "Exam 4",Point = 2 }
            };

            var series = ExamsChart.Series["ExamSeries"];         



            series.YValueMembers = "Point"; 
            series.XValueMember = "Name"; 

            //series.MarkerStyle = System.Web.UI.DataVisualization.Charting.MarkerStyle.Circle;
            //series.MarkerSize = 20;
            //series.LegendText = "hellow";
            //series.Label = "something";            


            var chartAreas = ExamsChart.ChartAreas["ChartArea1"];           


            ExamsChart.DataSource = exams;
            ExamsChart.DataBind(); 
        }

这是html代码：

<asp:Chart ID="ExamsChart" Width="600" Height="320" runat="server">
      <Titles>
      <asp:Title Text="Exam Report" />
      </Titles>
        <Series>
          <asp:Series Name="ExamSeries" ChartType="Column">
          </asp:Series>
        </Series>
        <ChartAreas>

          <asp:ChartArea Name="ChartArea1">
          <Area3DStyle Enable3D="true"  WallWidth="10" />
          </asp:ChartArea>
        </ChartAreas>
      </asp:Chart>

更新：

这是答案：

foreach (var exam in exams) {

                var point = new DataPoint();
                point.SetValueXY(exam.Name,exam.Point);

                point.Label = exam.Name;

                series.Points.Add(point); 
            }

解决方法

直接来自MS图表样本：

// Show data points values as labels
chart1.Series["Series1"].IsValueShownAsLabel = true;

// Set data point label
chart1.Series["Series1"].Points[2].Label = "My Point LabelnLabel Line #2";

（编辑：李大同）

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