ASP.NET Ajax和“无法加载类型”

Question

I have an ASP.NET web page with an Ajax file upload control. When I try to run my page, I'm told "Could not load type 'AjaxControlToolkit.AjaxFileUploadHandler' from assembly 'AjaxControlToolkit'."

Here's my control:

<ajaxtoolkit:AjaxFileUpload ID="AjaxFileUpload1" runat="server" />

Here's the relevant stuff in my web.config:

<system.web>
    <httpHandlers>
        <add verb="*" path="AjaxFileUploadHandler.axd"
            type="AjaxControlToolkit.AjaxFileUploadHandler, 
            AjaxControlToolkit"/>
    </httpHandlers>
    <pages>
        <controls>
            <add tagPrefix="ajaxtoolkit" namespace="AjaxControlToolkit" assembly="AjaxControlToolKit"/>
        </controls>
    </pages>
</system.web>

Here's my error message:

I'm running this app on Win Server 2k3 and IIS 6 and ASP.NET 4. It appears that my toolkit is the correct version.

I feel like it's probably a simple mistake, but I can't seem to find it. Let me know if more info is helpful. Thanks!

Jeremy

Answer 1

This is a common problem. Do a search for deleting ASP temporary files. If that does not solved it, sometimes a reinstall of Ajax using package manager sometimes resolved it.

Answer 2

Even I had this error

Well, I solved by removing AjaxFileUploadHandler fro Web.Config file:

<configuration>
    <system.webServer>
        <handlers>
            <!--add name="AjaxFileUploadHandler" verb="*" path="AjaxFileUploadHandler.axd" type="AjaxControlToolkit.AjaxFileUploadHandler, AjaxControlToolkit"/-->
        </handlers>
    </system.webServer>
    <system.web>
        <httpHandlers>
            <!--add verb="*" path="AjaxFileUploadHandler.axd" type="AjaxControlToolkit.AjaxFileUploadHandler, AjaxControlToolkit"/-->
        </httpHandlers>
    </system.web>
</configuration>

This solved my error above.