步骤如下:
1、
其中.NET Framework x.x中,从4版本开始新增Chart控件。(3.5及早期版本无Chart控件。)
3、直接拖动Chart控件到Default .aspx的 之间(拖动过程中自动生成相应代码,根据需要自行修改)。
示例如下:
<<SPAN style="FONT-SIZE: 9.5pt; FONT-FAMILY: nsimsun; BACKGROUND: yellow; COLOR: maroon; mso-bidi-font-family: nsimsun; mso-font-kerning: 0pt; mso-highlight: yellow">asp:Content ID="BodyContent" runat="server"ContentPlaceHolderID="MainContent" Height="400px" Width="500px">
<<SPAN style="BACKGROUND: yellow; COLOR: maroon; mso-highlight: yellow">asp:Chart ID="Chart1"runat="server">
<<SPAN style="COLOR: maroon">Series>
<<SPAN style="BACKGROUND: yellow; COLOR: maroon; mso-highlight: yellow">asp:SeriesName="Series1" ChartType="Column" ChartArea="ChartArea1">
</<SPAN style="BACKGROUND: yellow; COLOR: maroon; mso-highlight: yellow">asp:Series>
<<SPAN style="COLOR: maroon">asp:Series Name="Series2" ChartType="Column"ChartArea="ChartArea1">
</<SPAN style="COLOR: maroon">asp:Series>
</<SPAN style="COLOR: maroon">Series>
<<SPAN style="COLOR: maroon">ChartAreas>
<<SPAN style="COLOR: maroon">asp:ChartArea Name="ChartArea1">
</<SPAN style="COLOR: maroon">asp:ChartArea>
</<SPAN style="COLOR: maroon">ChartAreas>
</<SPAN style="COLOR: maroon">asp:Chart>
</<SPAN style="FONT-SIZE: 9.5pt; FONT-FAMILY: nsimsun; COLOR: maroon; mso-bidi-font-family: nsimsun; mso-font-kerning: 0pt">asp:Content>
(代码中黄色部分为拖动Chart控件过程中在Default .aspx文件自动生成的代码。其中Height和Width为图表控件的高和宽属性,自行添加设置。 成对的个数与后台代码“设置图表Y轴对应项”处的代码相关,此处设置为两个,最终体现在结果图中的两列对比数据显示)
…
debug="false" targetFramework="4.0">
…
(其中黄色部分为拖动Chart控件过程中Web .config文件中自动生成的代码,如果代码需要调试,将粉红色部分的debug状态设置为true)
4、在对应的Default.aspx.cs文件中添加相应的控件实现代码。
(1)首先在Default.Aspx.cs文件中添加命名空间:
using System.Data;// DataTable位于此命名空间中
(2)添加控件实现代码:
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = default(DataTable);
dt = CreateDataTable();
//设置图表的数据源
Chart1.DataSource = dt;
//设置图表Y轴对应项
Chart1.Series[0].YValueMembers = "Volume1";
Chart1.Series[1].YValueMembers = "Volume2";
//设置图表X轴对应项
Chart1.Series[0].XValueMember = "Date";
//绑定数据
Chart1.DataBind();
}
private DataTable CreateDataTable()
{
//Create a DataTable as the data source of the Chart control
DataTable dt = new DataTable();
//Add three columns to the DataTable
dt.Columns.Add("Date");
dt.Columns.Add("Volume1");
dt.Columns.Add("Volume2");
DataRow dr;
//Add rows to the table which contains some random data for demonstration
dr = dt.NewRow();
dr["Date"] = "Jan";
dr["Volume1"] = 3731;
dr["Volume2"] = 4101;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Date"] = "Feb";
dr["Volume1"] = 6024;
dr["Volume2"] = 4324;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Date"] = "Mar";
dr["Volume1"] = 4935;
dr["Volume2"] = 2935;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Date"] = "Apr";
dr["Volume1"] = 4466;
dr["Volume2"] = 5644;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Date"] = "May";
dr["Volume1"] = 5117;
dr["Volume2"] = 5671;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Date"] = "Jun";
dr["Volume1"] = 3546;
dr["Volume2"] = 4646;
dt.Rows.Add(dr);
return dt;
}
5、调试结果如下(其中WebSite1为项目名称)
“/WebSite1”应用程序中的服务器错误。
为 ChartImg.axd 执行子请求时出错。
说明: 执行当前 Web 请求期间,出现未经处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。
异常详细信息:
System.Web.HttpException: 为 ChartImg.axd 执行子请求时出错。
源错误:
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堆栈跟踪:
[HttpException (0x80004005): 为 ChartImg.axd 执行子请求时出错。] System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +3059030 System.Web.HttpServerUtility.Execute(String path, TextWriter writer, Boolean preserveForm) +851 System.Web.UI.DataVisualization.Charting.ChartHttpHandler.EnsureInitialized(Boolean hardCheck) +316 System.Web.UI.DataVisualization.Charting.Chart.GetImageStorageMode() +24 …… |