命名空间 'System.Web.UI.WebControls' 中不存在类型或命名空间名称 'ToolkitScriptManager'
The type or namespace name 'ToolkitScriptManager' does not exist in the namespace 'System.Web.UI.WebControls'
我收到以下错误
The type or namespace name 'ToolkitScriptManager' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
The type or namespace name 'ModalPopupExtender' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
The type or namespace name 'Accordion' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
我已经安装了 ajaxControlToolKit，我的 web.config 文件中有这个
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"><controls>
<add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" />
</controls></pages>
我的 .aspx 页面
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="PaintBrushCanvas.aspx.cs" Inherits="VirtualClassroom.PaintBrushCanvas" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Paint Brush</title>
<style type="text/css">
#container { position: relative; overflow: auto; scrollbar-base-color:#ffeaff; }
#imageView { border: 1px dashed #CCCCCC; margin: 5px; border-style: dotted; border-width: 1px; background-color: #FFFFFF; vertical-align: top; }
#imageTemp { position: absolute; top: 1px; left: 1px; margin: 5px; }
#imageTempt { position: absolute; top: 1px; left: 1px; margin: 5px; }
</style>
<link href="../StyleSheet.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="CanvasUtils.js"></script>
<script type="text/javascript">
window.moveTo(0, 0);
window.resizeTo(screen.width, screen.height);
</script>
</head>
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePageMethods="true">
</asp:ToolkitScriptManager>
<asp:ModalPopupExtender ID="ModalPopupExtender1" runat="server" BehaviorID="MPBehaviorIDOpen"
TargetControlID="btnPopupRender" PopupControlID="panelOpen" BackgroundCssClass="modalBackground"
PopupDragHandleControlID="panelOpenHead" OkControlID="btnOKOpen" CancelControlID="btnCancelOpen" />
<asp:ModalPopupExtender ID="ModalPopupExtender2" runat="server" BehaviorID="MPBehaviorIDResize"
TargetControlID="btnPopupRender" PopupControlID="panelPageSize" BackgroundCssClass="modalBackground"
PopupDragHandleControlID="panelPageSizeHead" OkControlID="btnPageSizeOK" CancelControlID="btnPageSizeCancel" />
<div>
<asp:Button id="btnPopupRender" Height="0px" Width="0px" runat="server" style="display:none;" />
</div>
<table style="height: 100%; vertical-align: top; width: 100%;">
<tr>
<td style="height: 100%; vertical-align: top;">
<asp:Accordion ID="MyAccordion" runat="server" SelectedIndex="0"
HeaderCssClass="accordionHeader" ContentCssClass="accordionContent"
FadeTransitions="true" FramesPerSecond="40" TransitionDuration="250"
AutoSize="None" CssClass="accordionStyle" Width="140">
<Panes>
<asp:AccordionPane ID="AccordionPane1" runat="server">
<Header>Toolbox</Header>
<Content>
<asp:ImageButton ID="btnOpen" runat="server" Width="40px" Height="40px"
OnClientClick="ShowPopup(event,'MPBehaviorIDOpen'); return false;" ImageUrl="~/Images/open.png" /><br />
<asp:Label ID="Label1" runat="server" Text="Open"></asp:Label><br /> <br />
<asp:ImageButton ID="btnPageSize" runat="server" Width="40px" Height="40px"
OnClientClick="ShowPopup(event,'MPBehaviorIDResize'); return false;" ImageUrl="~/Images/paperSettings.png" /><br />
<asp:Label ID="Label5" runat="server" Text="Page Size"></asp:Label><br /> <br />
<asp:ImageButton ID="btnDraw" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('pencil'); return false;" ImageUrl="~/Images/draw.png" /><br />
<asp:Label runat="server" Text="Draw"></asp:Label><br /><br />
<asp:ImageButton ID="btnText" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('text'); return false;" ImageUrl="~/Images/text.png" /><br />
<asp:Label ID="Label2" runat="server" Text="Text"></asp:Label><br /><br />
<asp:ImageButton ID="btnLine" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('line'); return false;" ImageUrl="~/Images/line.png" /><br />
<asp:Label runat="server" Text="Line"></asp:Label><br /><br />
<asp:ImageButton ID="btnSquare" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('rect'); return false;" ImageUrl="~/Images/square.png" /><br />
<asp:Label runat="server" Text="Square"></asp:Label><br /><br />
<asp:ImageButton ID="btnSave" runat="server" Width="40px" Height="40px"
OnClientClick="SaveDrawings();return false;" ImageUrl="~/Images/save.png" /><br />
<asp:Label ID="Label11" runat="server" Text="Save"></asp:Label><br /><br />
<asp:ImageButton ID="btnExit" runat="server" Width="40px" Height="40px"
OnClientClick="Exit();return false;" ImageUrl="~/Images/exit.png" /><br />
<asp:Label ID="Label3" runat="server" Text="Exit"></asp:Label><br /><br />
</Content>
</asp:AccordionPane>
</Panes>
</asp:Accordion>
</td>
<td style="height: 100%; vertical-align: top; ">
<div id="container">
<canvas id="imageView"></canvas>
</div>
</td>
</tr>
</table>
<div id="panelOpen" class="modalPopup" style="display:none;">
<div id="panelOpenHead" class="popupHeader">
<p>Choose File</p>
</div>
<div style="text-align:center;">
<p>
<input id="fileUploadImg" type="file" accept="image/*" />
</p>
<p>
<input type="button" id="btnOKOpen" value="OK" onclick="UpdateCanvas(); return false;" />
<input type="button" id="btnCancelOpen" value="Cancel" />
</p>
</div>
</div>
<div id="panelPageSize" class="modalPopup" style="display:none;">
<div id="panelPageSizeHead" class="popupHeader">
<p>Page Size</p>
</div>
<div style="text-align:center;">
<p>
Enter Width: <input type="text" id="txtWidth" style="width:100px;" /> px
</p>
<p>
Enter Height: <input type="text" id="txtHeight" style="width:100px;" /> px
</p>
<p>
<input type="button" id="btnPageSizeOK" value="OK" onclick="Resize(); return false;" />
<input type="button" id="btnPageSizeCancel" value="Cancel" />
</p>
</div>
</div>
</form>
</body>
</html>
这是我的 web.config 文件
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<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"/>
<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>
<connectionStrings>
<add name="DBCS" connectionString="data source=.; database=xxx; integrated security=SSPI" providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<authentication mode="Forms">
<forms loginUrl="SelectUser.aspx" defaultUrl="SelectUser.aspx" />
</authentication>
<authorization>
<deny users="?" />
</authorization>
<membership>
<providers>
<clear />
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
</providers>
</membership>
<profile>
<providers>
<clear />
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
</providers>
</profile>
<roleManager enabled="false">
<providers>
<clear />
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
</providers>
</roleManager>
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"><controls>
<add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" />
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls></pages>
</system.web>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
<assemblies>
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.WindowsAzure.Storage" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.1.0.4" newVersion="2.1.0.4" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="HtmlAgilityPack" publicKeyToken="bd319b19eaf3b43a" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-1.4.9.0" newVersion="1.4.9.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
我已经努力摆脱这个错误，但我提前 cant.Please help.Thanks!!
存在于命名空间System.Web.UI.WebControls；
但是为了使用它你必须安装 AJAX 工具包。
在使用 AJAX 工具包中的控件之前，您必须重新注册工具包脚本管理器。
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
你可以再做一件事。
1.Remove 工具箱中的 Ajax 控制选项卡。
2.Re-添加选项卡并右键单击选项卡，Select选择项目并浏览到您自己项目中的AjaxControltoolkit.dll文件并按确定（确保您正在使用与您的 C# 版本相同的 ajax 工具包版本。
3.Clean 并重建解决方案，您就可以开始了。
给你添加这些程序集web.config
<assemblies>
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
并将你的标签修改为 asp 而不是 ajaxToolkit。
我想这会对你有所帮助。
我遇到了这个问题，后来发现这个问题在 15.1 版本中被移除了。参见 https://github.com/DevExpress/AjaxControlToolkit/wiki/Upgrading-from-v7.x-and-below#toolkitscriptmanager-removed-in-v151-use-scriptmanager
我收到以下错误
The type or namespace name 'ToolkitScriptManager' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
The type or namespace name 'ModalPopupExtender' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
The type or namespace name 'Accordion' does not exist in the namespace 'System.Web.UI.WebControls' (are you missing an assembly reference?)
我已经安装了 ajaxControlToolKit，我的 web.config 文件中有这个
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"><controls>
<add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" />
</controls></pages>
我的 .aspx 页面
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="PaintBrushCanvas.aspx.cs" Inherits="VirtualClassroom.PaintBrushCanvas" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Paint Brush</title>
<style type="text/css">
#container { position: relative; overflow: auto; scrollbar-base-color:#ffeaff; }
#imageView { border: 1px dashed #CCCCCC; margin: 5px; border-style: dotted; border-width: 1px; background-color: #FFFFFF; vertical-align: top; }
#imageTemp { position: absolute; top: 1px; left: 1px; margin: 5px; }
#imageTempt { position: absolute; top: 1px; left: 1px; margin: 5px; }
</style>
<link href="../StyleSheet.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="CanvasUtils.js"></script>
<script type="text/javascript">
window.moveTo(0, 0);
window.resizeTo(screen.width, screen.height);
</script>
</head>
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePageMethods="true">
</asp:ToolkitScriptManager>
<asp:ModalPopupExtender ID="ModalPopupExtender1" runat="server" BehaviorID="MPBehaviorIDOpen"
TargetControlID="btnPopupRender" PopupControlID="panelOpen" BackgroundCssClass="modalBackground"
PopupDragHandleControlID="panelOpenHead" OkControlID="btnOKOpen" CancelControlID="btnCancelOpen" />
<asp:ModalPopupExtender ID="ModalPopupExtender2" runat="server" BehaviorID="MPBehaviorIDResize"
TargetControlID="btnPopupRender" PopupControlID="panelPageSize" BackgroundCssClass="modalBackground"
PopupDragHandleControlID="panelPageSizeHead" OkControlID="btnPageSizeOK" CancelControlID="btnPageSizeCancel" />
<div>
<asp:Button id="btnPopupRender" Height="0px" Width="0px" runat="server" style="display:none;" />
</div>
<table style="height: 100%; vertical-align: top; width: 100%;">
<tr>
<td style="height: 100%; vertical-align: top;">
<asp:Accordion ID="MyAccordion" runat="server" SelectedIndex="0"
HeaderCssClass="accordionHeader" ContentCssClass="accordionContent"
FadeTransitions="true" FramesPerSecond="40" TransitionDuration="250"
AutoSize="None" CssClass="accordionStyle" Width="140">
<Panes>
<asp:AccordionPane ID="AccordionPane1" runat="server">
<Header>Toolbox</Header>
<Content>
<asp:ImageButton ID="btnOpen" runat="server" Width="40px" Height="40px"
OnClientClick="ShowPopup(event,'MPBehaviorIDOpen'); return false;" ImageUrl="~/Images/open.png" /><br />
<asp:Label ID="Label1" runat="server" Text="Open"></asp:Label><br /> <br />
<asp:ImageButton ID="btnPageSize" runat="server" Width="40px" Height="40px"
OnClientClick="ShowPopup(event,'MPBehaviorIDResize'); return false;" ImageUrl="~/Images/paperSettings.png" /><br />
<asp:Label ID="Label5" runat="server" Text="Page Size"></asp:Label><br /> <br />
<asp:ImageButton ID="btnDraw" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('pencil'); return false;" ImageUrl="~/Images/draw.png" /><br />
<asp:Label runat="server" Text="Draw"></asp:Label><br /><br />
<asp:ImageButton ID="btnText" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('text'); return false;" ImageUrl="~/Images/text.png" /><br />
<asp:Label ID="Label2" runat="server" Text="Text"></asp:Label><br /><br />
<asp:ImageButton ID="btnLine" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('line'); return false;" ImageUrl="~/Images/line.png" /><br />
<asp:Label runat="server" Text="Line"></asp:Label><br /><br />
<asp:ImageButton ID="btnSquare" runat="server" Width="40px" Height="40px"
OnClientClick="SelectTool('rect'); return false;" ImageUrl="~/Images/square.png" /><br />
<asp:Label runat="server" Text="Square"></asp:Label><br /><br />
<asp:ImageButton ID="btnSave" runat="server" Width="40px" Height="40px"
OnClientClick="SaveDrawings();return false;" ImageUrl="~/Images/save.png" /><br />
<asp:Label ID="Label11" runat="server" Text="Save"></asp:Label><br /><br />
<asp:ImageButton ID="btnExit" runat="server" Width="40px" Height="40px"
OnClientClick="Exit();return false;" ImageUrl="~/Images/exit.png" /><br />
<asp:Label ID="Label3" runat="server" Text="Exit"></asp:Label><br /><br />
</Content>
</asp:AccordionPane>
</Panes>
</asp:Accordion>
</td>
<td style="height: 100%; vertical-align: top; ">
<div id="container">
<canvas id="imageView"></canvas>
</div>
</td>
</tr>
</table>
<div id="panelOpen" class="modalPopup" style="display:none;">
<div id="panelOpenHead" class="popupHeader">
<p>Choose File</p>
</div>
<div style="text-align:center;">
<p>
<input id="fileUploadImg" type="file" accept="image/*" />
</p>
<p>
<input type="button" id="btnOKOpen" value="OK" onclick="UpdateCanvas(); return false;" />
<input type="button" id="btnCancelOpen" value="Cancel" />
</p>
</div>
</div>
<div id="panelPageSize" class="modalPopup" style="display:none;">
<div id="panelPageSizeHead" class="popupHeader">
<p>Page Size</p>
</div>
<div style="text-align:center;">
<p>
Enter Width: <input type="text" id="txtWidth" style="width:100px;" /> px
</p>
<p>
Enter Height: <input type="text" id="txtHeight" style="width:100px;" /> px
</p>
<p>
<input type="button" id="btnPageSizeOK" value="OK" onclick="Resize(); return false;" />
<input type="button" id="btnPageSizeCancel" value="Cancel" />
</p>
</div>
</div>
</form>
</body>
</html>
这是我的 web.config 文件
<?xml version="1.0" encoding="utf-8"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<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"/>
<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>
<connectionStrings>
<add name="DBCS" connectionString="data source=.; database=xxx; integrated security=SSPI" providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<authentication mode="Forms">
<forms loginUrl="SelectUser.aspx" defaultUrl="SelectUser.aspx" />
</authentication>
<authorization>
<deny users="?" />
</authorization>
<membership>
<providers>
<clear />
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
</providers>
</membership>
<profile>
<providers>
<clear />
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
</providers>
</profile>
<roleManager enabled="false">
<providers>
<clear />
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
</providers>
</roleManager>
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"><controls>
<add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" />
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls></pages>
</system.web>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
<assemblies>
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="Microsoft.WindowsAzure.Storage" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.1.0.4" newVersion="2.1.0.4" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="HtmlAgilityPack" publicKeyToken="bd319b19eaf3b43a" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-1.4.9.0" newVersion="1.4.9.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
我已经努力摆脱这个错误，但我提前 cant.Please help.Thanks!!
存在于命名空间System.Web.UI.WebControls；
但是为了使用它你必须安装 AJAX 工具包。
在使用 AJAX 工具包中的控件之前，您必须重新注册工具包脚本管理器。
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
你可以再做一件事。
1.Remove 工具箱中的 Ajax 控制选项卡。
2.Re-添加选项卡并右键单击选项卡，Select选择项目并浏览到您自己项目中的AjaxControltoolkit.dll文件并按确定（确保您正在使用与您的 C# 版本相同的 ajax 工具包版本。
3.Clean 并重建解决方案，您就可以开始了。
给你添加这些程序集web.config
<assemblies>
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
并将你的标签修改为 asp 而不是 ajaxToolkit。
我想这会对你有所帮助。
我遇到了这个问题，后来发现这个问题在 15.1 版本中被移除了。参见 https://github.com/DevExpress/AjaxControlToolkit/wiki/Upgrading-from-v7.x-and-below#toolkitscriptmanager-removed-in-v151-use-scriptmanager