命名空間'System.Web.UI.WebControls'中不存在類型或名稱空間名稱'Chart'

Question

如何解決此錯誤？我在圖表的不同項目中使用相同的代碼。我只是做了複製粘貼。但是這次它顯示了這個新的錯誤。

我添加引用

。

UserHomePage.aspx

<asp:Chart ID="ChartHour1001" class="img-responsive" runat="server" Width="800px"> 
    <Titles> 

    </Titles> 
     <Series> 
      <asp:Series Name="Series1"></asp:Series> 
     </Series> 
     <ChartAreas> 
      <asp:ChartArea Name="ChartArea1"> 
       <AxisX Title="Hours"> 
        <MajorGrid Enabled="false" /> 
        <LabelStyle Interval="1" /> 
       </AxisX> 
       <AxisY Title="Sales"> 
        <MajorGrid Enabled="false" /> 
       </AxisY> 
      </asp:ChartArea> 
     </ChartAreas> 
</asp:Chart> 

UserHomePage.cs文件

private void getChartData() 
    { 
     Series series = Chart1.Series["Series1"]; 
     series.Points.AddXY("1201", "96025.29"); 
     series.Points.AddXY("1302", "398246.54"); 
     series.Points.AddXY("1400", "303102.24"); 
     series.Points.AddXY("2001", "377009.92"); 
     series.Points.AddXY("2400", "200710.91"); 

     ///Color[] colors = new Color[] { Color.FromArgb(65,140,240), Color.Green, Color.Wheat, Color.Gray, Color.Blue }; 
     foreach (Series seriess in Chart1.Series) 
     { 
      foreach (DataPoint point in seriess.Points) 
      { 
       //Set color for the bar 
       point.Color = colors[series.Points.IndexOf(point)]; 
      } 
     } 

     series.IsValueShownAsLabel = true; 
    } 

但誤差在UserHomePage.designer.cs

存在的

protected global::System.Web.UI.WebControls.Chart Chart1; //error occuring Line 

的web.config

<configuration> 
    <configSections> 


    </configSections> 
    <appSettings> 
    <!--ADD this line--> 
     <add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;"/> 
    </appSettings> 
    <connectionStrings> 
     <!-- I removed Connection String lines --> 
</connectionStrings> 

<system.web> 
    <compilation debug="true" targetFramework="4.5"> 
     <!-- Removed --> 
    </compilation> 
    <httpRuntime/> 
    <pages controlRenderingCompatibilityVersion="4.0"> 
     <namespaces> 
      <add namespace="System.Web.Optimization"/> 
     </namespaces> 
     <controls> 
      <add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt"/> 
    <!--Added new line--> 
    <add tagPrefix="asp" namespace="System.Web.UI.DataVisualization.Charting" assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> 
     </controls> 
    </pages> 
    <authentication mode="Forms"> 
     <forms loginUrl="~/Account/Login.aspx" timeout="2880"/> 
    </authentication> 
    <profile defaultProvider="DefaultProfileProvider"> 
     <providers> 
      <add name="DefaultProfileProvider" type="System.Web.Providers.DefaultProfileProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/"/> 
     </providers> 
    </profile> 
    <membership defaultProvider="DefaultMembershipProvider"> 
     <providers> 
      <add name="DefaultMembershipProvider" type="System.Web.Providers.DefaultMembershipProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/> 
     </providers> 
    </membership> 
    <roleManager defaultProvider="DefaultRoleProvider"> 
     <providers> 
      <add name="DefaultRoleProvider" type="System.Web.Providers.DefaultRoleProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" applicationName="/"/> 
     </providers> 
    </roleManager> 
    <sessionState mode="InProc" customProvider="DefaultSessionProvider"> 
     <providers> 
      <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection"/> 
     </providers> 
    </sessionState> 
    <httpModules> 
     <add type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v15.2, Version=15.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" name="ASPxHttpHandlerModule"/> 
    </httpModules> 
    <httpHandlers> 
<add path="DX.ashx" verb="GET" type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v15.2, Version=15.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" 
validate="false" /> 
<add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" 
validate="false" /> 
</httpHandlers> 
</system.web> 
<entityFramework> 
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework"> 
     <parameters> 
      <parameter value="v13.0"/> 
     </parameters> 
    </defaultConnectionFactory> 
</entityFramework> 
<system.webServer> 
<modules> 
<add type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v15.2, Version=15.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" 
name="ASPxHttpHandlerModule" /> 
</modules> 
<validation validateIntegratedModeConfiguration="false" /> 
<handlers> 
<remove name="ChartImageHandler" /> 
<add type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v15.2, Version=15.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" 
verb="GET" path="DX.ashx" name="ASPxHttpHandlerModule" preCondition="integratedMode" /> 
<add name="ChartImageHandler" preCondition="integratedMode" verb="GET,HEAD,POST" 
path="ChartImg.axd" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> 
</handlers> 
</system.webServer> 
<devExpress> 
    <themes enableThemesAssembly="true" styleSheetTheme="" theme="" customThemeAssemblies=""/> 
    <compression enableHtmlCompression="false" enableCallbackCompression="true" enableResourceCompression="true" enableResourceMerging="true"/> 
    <settings doctypeMode="Html5" rightToLeft="false" embedRequiredClientLibraries="false" ieCompatibilityVersion="edge"/> 
    <errors callbackErrorRedirectUrl=""/> 
</devExpress> 
</configuration> 

Answer 1

嘗試改變

protected global::System.Web.UI.WebControls.Chart Chart1; 

要

protected global::System.Web.UI.DataVisualization.Charting.Chart Chart1;