Question

asp.net 怎么使用web chart的控件

Answer 1

在ASP.NET中引用WebChart控件

使用WebControl创建图表, 支持渲染图片类型为(png, jpg, gif, etc). 控件支持:

Line Charts

Smooth Line Charts

Column Charts

Area Charts

Scattered Charts

Stacked Column Charts

Pie Charts

Stacked Area Charts

使用方法如下：

下载后将Webchar.dll复制到项目bin目录中，并添加到工具箱中，控件名称为ChartControl。

将控件添加页面，下面是我项目中使用柱形图的例子：

this.vehicle = (Vehicle)Session["vehicle"];

DataTable table = vService.GetVehicleCountByType(tableName, vehicle);

ChartPointCollection chart = new
ChartPointCollection();
Chart c = new StackedColumnChart(chart,
Color.White);

//填充
chart = c.Data;
c.Fill.Color =
Color.Red;
c.Fill.Type = InteriorType.Solid;

c.Shadow.Color = Color.Red;
//显示数字

c.DataLabels.Visible = true;
ColumnChart column = new
ColumnChart(chart, Color.Red);
column.MaxColumnWidth =
20;
column.DataSource = table.DefaultView;

column.DataXValueField = "vinfo5";
column.DataYValueField =
"vinfo5Count";
column.DataLabels.Visible = true;

column.Fill.Color = Color.Red;
column.DataBind();

this.ChartControl1.Charts.Add(column);

this.ChartControl1.XTitle.Text = "车辆类型";

this.ChartControl1.YTitle.Text = "数量";

this.ChartControl1.ChartTitle.Text = this.Page.Title + "统计图";

this.ChartControl1.BorderStyle = BorderStyle.None;

this.ChartControl1.RedrawChart();