首先說(shuō)下原先的情況，就是原本老項(xiàng)目的Web解決方案是使用.net framework 2.0的老版本，

所以機(jī)器也安裝過(guò)Microsoft ASP.NET 2.0 AJAX Extensions..AJAX插件..

但是因?yàn)楹竺娣N種原因反正就是要升級(jí)到.net framework 3.5的版本。

因此導(dǎo)致出現(xiàn) (基類(lèi)包括字段“ScriptManager1”，但其類(lèi)型(System.Web.UI.ScriptManager)與控件(System.Web.UI.ScriptManager)的類(lèi)型不兼容。）

這個(gè)問(wèn)題是 ajax 版本和你的平臺(tái)版本不符合 解決這個(gè)問(wèn)題的辦法是 只要修改原來(lái)注冊(cè)的asp標(biāo)記版本號(hào)換3.5的版本如下：

<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0,Culture=neutral,PublicKeyToken=31BF3856AD364E35" Namespace="System.Web.UI" TagPrefix="asp" %>更換后

<%@ Register Assembly="System.Web.Extensions, Version=3.5.0.0,Culture=neutral,PublicKeyToken=31BF3856AD364E35" Namespace="System.Web.UI" TagPrefix="asp" %> 運(yùn)行后可能還未能解決。我當(dāng)時(shí)報(bào)出另一個(gè)錯(cuò)誤 （服務(wù)器標(biāo)記“asp:ScriptManager”不明確。請(qǐng)修改導(dǎo)致此多義性的關(guān)聯(lián)注冊(cè)并選取新的標(biāo)記前綴。）

這時(shí) 我的解決版本是打開(kāi)你的web.config文件 將以下所有xml代碼的版本號(hào)更改為Version=3.5.0.0

<sectionGroup name="system.web.extensions"  type="System.Web.Configuration.SystemWebExtensionsSectionGroup,  System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35">    <sectionGroup name="scripting"    type="System.Web.Configuration.ScriptingSectionGroup,    System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,    PublicKeyToken=31bf3856ad364e35">      <section name="scriptResourceHandler"      type="System.Web.Configuration.ScriptingScriptResourceHandlerSection,      System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,      PublicKeyToken=31bf3856ad364e35" requirePermission="false"      allowDefinition="MachineToApplication"/>      <sectionGroup name="webServices"      type="System.Web.Configuration.ScriptingWebServicesSectionGroup,      System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,      PublicKeyToken=31bf3856ad364e35">        <section name="jsonSerialization"        type="System.Web.Configuration.ScriptingJsonSerializationSection,        System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,        PublicKeyToken=31bf3856ad364e35" requirePermission="false"        allowDefinition="Everywhere" />        <section name="profileService"        type="System.Web.Configuration.ScriptingProfileServiceSection,        System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,        PublicKeyToken=31bf3856ad364e35" requirePermission="false"        allowDefinition="MachineToApplication" />        <section name="authenticationService"        type="System.Web.Configuration.ScriptingAuthenticationServiceSection,        System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,        PublicKeyToken=31bf3856ad364e35" requirePermission="false"        allowDefinition="MachineToApplication" />    </sectionGroup>  </sectionGroup></sectionGroup>

找到<system.web>下的<pages>節(jié)點(diǎn)，添加下列控件的聲明

<controls>  <add tagPrefix="asp" namespace="System.Web.UI"    assembly="System.Web.Extensions, Version=1.0.61025.0,    Culture=neutral, PublicKeyToken=31bf3856ad364e35"/></controls>在 <assemblies> 節(jié)點(diǎn)內(nèi)添加對(duì)程序集的聲明

<add assembly="System.Web.Extensions, Version=1.0.61025.0,  Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>找到 <httpHandlers> 節(jié)點(diǎn)，往里面添加以下謂詞處理程序

<add verb="*" path="*.asmx" validate="false"  type="System.Web.Script.Services.ScriptHandlerFactory,  System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35"/><add verb="*" path="*_AppService.axd" validate="false"  type="System.Web.Script.Services.ScriptHandlerFactory,  System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35"/><add verb="GET,HEAD" path="ScriptResource.axd"  type="System.Web.Handlers.ScriptResourceHandler,  System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35" validate="false"/>

在<httpModules>節(jié)點(diǎn)內(nèi)添加以下腳本模塊處理程序

<add name="ScriptModule"  type="System.Web.Handlers.ScriptModule, System.Web.Extensions,  Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35"/>在<SharePoint> 元素中的 <SafeControls> 節(jié)點(diǎn)內(nèi)聲明為安全控件

<SafeControl Assembly="System.Web.Extensions,  Version=1.0.61025.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI"  TypeName="*" Safe="True" />找到<configuration> 節(jié)點(diǎn)，添加以下Web 服務(wù)處理程序

<system.web.extensions>    <scripting>      <webServices>      <!-- 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=1.0.61025.0,      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=1.0.61025.0,      Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>      <add name="ScriptHandlerFactoryAppServices" verb="*"      path="*_AppService.axd" preCondition="integratedMode"      type="System.Web.Script.Services.ScriptHandlerFactory,      System.Web.Extensions, Version=1.0.61025.0,      Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>      <add name="ScriptResource" preCondition="integratedMode"      verb="GET,HEAD" path="ScriptResource.axd"      type="System.Web.Handlers.ScriptResourceHandler,      System.Web.Extensions, Version=1.0.61025.0,      Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>    </handlers></system.webServer>