ImageResizer Debug "Sequence contains no matching element"

Question

Whenever I try to access "resizer.debug" or "resizer.debug.ashx", I get a "Sequence contains no matching element" error. I am using pre-release 4.0.0. It worked fine in 3.4.3.

I posted this question on the ImageResizer website and I was asked to move it here with a copy of my web.config. So, here I am!

Here is my web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="resizer" type="ImageResizer.ResizerSection" requirePermission="false" />
  </configSections>





  <!--
    For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

    The following attributes can be set on the <httpRuntime> tag.
      <system.Web>
        <httpRuntime targetFramework="4.5" />
      </system.Web>
  -->
  <connectionStrings>
    <add name="vsproductsConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\acessdb.mdb" providerName="System.Data.OleDb" />
  </connectionStrings>
  <appSettings>
    <add key="leftNavSearchCriteriaGroupIds" value="3,4,1" />
    <add key="productNameSearchCriteriaGroupIds" value="3,4,1" />
  </appSettings>
  <system.web>
    <compilation targetFramework="4.5" defaultLanguage="c#" debug="true" />
    <pages controlRenderingCompatibilityVersion="4.0">
    </pages>
    <customErrors mode="Off">
    </customErrors>
    <trust level="Full" />




    <httpModules>
      <add name="ImageResizingModule" type="ImageResizer.InterceptModule" />
    </httpModules>
  </system.web>
  <system.webServer>
    <defaultDocument>
      <files>
        <clear />
        <add value="default.aspx" />
        <add value="default.asp" />
      </files>
    </defaultDocument>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
    <rewrite>
      <!--<allowedServerVariables>
        <add name="ORIGINAL_URI" />
        <add name="RULE_ID" />
      </allowedServerVariables>-->
      <rules>
        <rule name="Section" stopProcessing="true">
          <match url="^products/([^/]*)(/*)$" />
          <conditions>
            <add matchType="IsDirectory" negate="true" ignoreCase="true" />
          </conditions>
          <action type="Rewrite" url="products.aspx?sn={R:1}" appendQueryString="true" />
          <!--<serverVariables>
            <set name="HEADER_ORIGINAL_URI" value="{REQUEST_URI}" />
          </serverVariables>-->
        </rule>
      </rules>
    </rewrite>


    <validation validateIntegratedModeConfiguration="false" />
    <modules>
      <add name="ImageResizingModule" type="ImageResizer.InterceptModule" />
    </modules>
  </system.webServer>

  <resizer>

    <pipeline fakeExtensions=".ashx" defaultCommands="autorotate.default=true"/>
    <diagnostics enableFor="localhost" />
    <plugins>
      <!--<add name="PdfRenderer" downloadNativeDependencies="true" />-->
      <add name="PdfiumRenderer" downloadNativeDependencies="true"/>
    </plugins>
  </resizer>
</configuration>

Also, here is the text from the error page...

Server Error in '/' Application.

Sequence contains no matching element

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Sequence contains no matching element

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: Sequence contains no matching element] System.Linq.Enumerable.First(IEnumerable1 source, Func2 predicate) +276 ImageResizer.Plugins.Basic.DiagnosticPageHandler.GenerateOutput(HttpContext context, Config c) +2730 ImageResizer.Plugins.Basic.DiagnosticPageHandler.ProcessRequest(HttpContext context) +138 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +188 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.79.0

Lilith River Lilith River · Accepted Answer · 2015-09-29T16:24:29

We've fixed this bug in 4.0.0.901 zip. It occurs when you don't have any of the standard plugins installed, like DiskCache.

Check our nuget feed for the latest versions of the packages.

ImageResizer Debug "Sequence contains no matching element"

1 Answers