ASP.Net：元 不是已知的元素(ASP.Net: Element Is No

2019-10-17 06:29发布

站内文章 / 前端开发
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我一直在试图从ASP.NET AJAX Control Toolkit的使用自动完成扩展，但我一直有吨的麻烦得到它的实际工作。

要安装AjaxControlToolKit，我已经把它放在我的应用程序的bin directoy里面，然后我就拖放控件到窗体。 然而，它口口声声说，

“元素‘AutoCompleteExtender’不是一个已知的元素”

所以刚开始，我以为我也没有登记过，但当时我看了一下头，它已经在那里了： 

<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TagPrefix="asp" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" tagprefix="ajaxToolkit"%>

所以，我不知道在所有的，为什么它仍然给我的问题。

在我的bin文件夹中的其他组件文件包括：

System.Web.Extensions.ddl System.Web.Extensions.Design.dll

这里是我的代码： 

<asp:TextBox ID="txtOrganization" runat="server" Width ="500px" MaxLength ="250"></asp:TextBox>
<asp:ScriptManager ID="ScriptManager1" runat="server">
    <Services>
        <asp:ServiceReference Path="AutoComplete.asmx" />
    </Services>
</asp:ScriptManager>
<ajaxToolkit:AutoCompleteExtender runat="server" TargetControlID="txtOrganization" ServiceMethod="GetOrganizationList" ServicePath="AutoComplete.asmx"></ajaxToolkit:AutoCompleteExtender>

Answer 1:

我固定它，得到它的工作。 我不得不更改我的aspx页面和我的web.config。

ASPX：将此添加到我的网页的顶部： 

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" tagprefix="ajaxToolkit"%>

我的控制现在看起来是这样的： 

        <asp:TextBox ID="txtOrganization" runat="server" Width ="500px" MaxLength ="250"></asp:TextBox>
        <asp:ScriptManager ID="ScriptManager1" runat="server" >
            <Services>
                <asp:ServiceReference Path="AutoComplete.asmx" />
            </Services>
        </asp:ScriptManager>
        <ajaxToolkit:AutoCompleteExtender runat="server" ID="AutoComplete1" 
                                          TargetControlID="txtOrganization" 
                                          ServicePath="AutoComplete.asmx" ServiceMethod="GetOrganizationList"
                                          MinimumPrefixLength="1" EnableCaching="true"
                                          FirstRowSelected="true">
        </ajaxToolkit:AutoCompleteExtender>

至于我的web.config，我增加了以下内容： 

<configSections>
    <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
        <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
            <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
            <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
                <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere"/>
                <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
                <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
            </sectionGroup>
        </sectionGroup>
    </sectionGroup>
</configSections>

<system.web>
    <pages>
        <controls>
            <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        </controls> 
    </pages>
    <customErrors mode="Off"/>
    <compilation debug="true" strict="false" explicit="true">
        <assemblies>
            <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
            <add assembly="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        </assemblies>               
    </compilation>
    <httpHandlers>
        <remove verb="*" path="*.asmx"/>
        <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
    </httpHandlers>
    <httpModules>
        <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </httpModules>
    <sessionState mode="InProc" cookieless="false" timeout="240"/>
    <!--
        The <authentication> section enables configuration 
        of the security authentication mode used by 
        ASP.NET to identify an incoming user. 
    -->
    <authentication mode="Forms"/>
    <!--
        The <customErrors> section enables configuration 
        of what to do if/when an unhandled error occurs 
        during the execution of a request. Specifically, 
        it enables developers to configure html error pages 
        to be displayed in place of a error stack trace.

    <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
        <error statusCode="403" redirect="NoAccess.htm" />
        <error statusCode="404" redirect="FileNotFound.htm" />
    </customErrors>
    -->
    <httpRuntime maxRequestLength="16000" useFullyQualifiedRedirectUrl="true" executionTimeout="180"/>
</system.web>
<system.web.extensions>
    <scripting>
        <webServices>
            <!-- Uncomment this line to customize maxJsonLength and add a custom converter -->
            <!--
  <jsonSerialization maxJsonLength="500">
    <converters>
      <add name="ConvertMe" type="Acme.SubAcme.ConvertMeTypeConverter"/>
    </converters>
  </jsonSerialization>
  -->
            <!-- Uncomment this line to enable the authentication service. Include requireSSL="true" if appropriate. -->
            <!--
    <authenticationService enabled="true" requireSSL = "true|false"/>
  -->
            <!-- Uncomment these lines to enable the profile service. To allow profile properties to be retrieved
       and modified in ASP.NET AJAX applications, you need to add each property name to the readAccessProperties and
       writeAccessProperties attributes. -->
            <!--
  <profileService enabled="true"
                  readAccessProperties="propertyname1,propertyname2"
                  writeAccessProperties="propertyname1,propertyname2" />
  -->
        </webServices>
        <!--
  <scriptResourceHandler enableCompression="true" enableCaching="true" />
  -->
    </scripting>
</system.web.extensions>
<system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules>
        <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </modules>
    <handlers>
        <remove name="WebServiceHandlerFactory-Integrated"/>
        <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </handlers>
</system.webServer>

本来，因为我使用asp.net 2.0，System.Web.Extensions程序的版本号为1.6 ....于是我只好给它的所有更改为3.5.0.0。

此外，虽然寻找解决的办法，人很多说我不得不把System.Web.Extensions.dll和System.Web.Extensions.Design.dll的拷贝到bin文件夹。 我没有做到这一点，我只是仅仅增加了他们一个参考。



Answer 2:

你添加一个引用它的项目？ 右键单击该项目在Visual Studio中......命中属性旁边的引用，你应该看到AjaxControlToolkit在那里...如果没有，打...添加到了浏览选项卡，并选中它。

我认为没有其他控制工作？



Answer 3:

你把一个ScriptManager在页面顶部？ 你必须要做到这一点，以获得工具包控件才能正常工作。

编辑：有这个问题的许多潜在原因; 您没有正确安装的AJAX工具包，也有你的网站，等编译错误的一个比较常见的问题是，你需要声明的工具包在你的web.config文件。 里面的网页标签，添加以下内容： 

<controls>
<add tagPrefix="ajaxToolkit" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit"/>
</controls>


文章来源: ASP.Net: Element Is Not A Known Element
标签： vb.net asp.net-2.0 autocompleteextender
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