[Solved] Object reference not set to an instance of an object.

[Joeri]

When I try to upload a file, I always get as filename "Object reference not set to an instance of an object." and I couldn't find the problem.

that's my web.config :

    <system.web>
        <httpRuntime maxRequestLength="1024000" executionTimeout= "3600" />
        <compilation debug="true">
            <assemblies>
                <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
                <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
                <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
                <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            </assemblies>
        </compilation>
        <authentication mode="Windows"/>
        <pages>
            <controls>
                <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
                <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            </controls>
        </pages>
        <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"/>
            <add verb="*" path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler, Telerik.Web.UI" validate="false" />
        </httpHandlers>
        <httpModules>
            <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule" />
        </httpModules>
    </system.web>
    <system.codedom>
        <compilers>
            <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
                <providerOption name="CompilerVersion" value="v3.5"/>
                <providerOption name="WarnAsError" value="false"/>
            </compiler>
            <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
                <providerOption name="CompilerVersion" value="v3.5"/>
                <providerOption name="OptionInfer" value="true"/>
                <providerOption name="WarnAsError" value="false"/>
            </compiler>
        </compilers>
    </system.codedom>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
        <modules>
            <remove name="ScriptModule"/>
            <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add name="RadUploadModule" preCondition="integratedMode" type="Telerik.Web.UI.RadUploadHttpModule" />
        </modules>
        <handlers>
            <remove name="WebServiceHandlerFactory-Integrated"/>
            <remove name="ScriptHandlerFactory"/>
            <remove name="ScriptHandlerFactoryAppServices"/>
            <remove name="ScriptResource"/>
            <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"/>
            <add name="Telerik.RadUploadProgressHandler.ashx_*" path="Telerik.RadUploadProgressHandler.ashx" verb="*" type="Telerik.Web.UI.Upload.RadUploadProgressHandler, Telerik.Web.UI" preCondition="integratedMode,runtimeVersionv2.0" />
        </handlers>
        <security >
            <requestFiltering>
                <requestLimits maxAllowedContentLength="1024000000" />
            </requestFiltering>
        </security>
    </system.webServer>
    <runtime>
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
                <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
            </dependentAssembly>
            <dependentAssembly>
                <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
                <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
            </dependentAssembly>
        </assemblyBinding>
    </runtime>

[Genady Sergeev]

Hello Joeri,

Everything seems to be okay with your web config. Do you have any validation on your web-page? Perhaps the uploaded files are places in the InvalidFiles collection instead of the UploadedFiles one. How do you try to access the files? Are they correctly uploaded to the target folder? Can you paste here your aspx and codebehind code?

Sincerely yours,
Genady Sergeev
the Telerik team

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[Joeri]

            <h2>Uploading ZIP Files</h2>
            <telerik:RadUpload ID="ru" runat="server" AllowedMimeTypes="application/x-compressed,application/x-zip-compressed,application/zip,multipart/x-zip,application/x-gzip,multipart/x-gzip"
                BorderStyle="None" InputSize="50" MaxFileInputsCount="20"  TargetFolder="~/Temp" MaxFileSize="2000000000"
                OverwriteExistingFiles="True" />
            <div class="clear"></div>
            <telerik:RadProgressManager ID="rpm" runat="server" />
            <telerik:RadProgressArea id="rpa" runat="server" BorderStyle="None"
                DisplayCancelButton="True" Skin="Outlook" >
                <Localization Uploaded="Uploaded" />
            </telerik:RadProgressArea>
            <div class="hr"></div>
            <asp:Button runat="server" id="Button1" Text="Submit" OnClick="btnSubmit_Click" style="float:right; width:125px;" />
            <div style="clear:both; height:20px;"></div>

    protected void btnSubmit_Click(object sender, System.EventArgs e)
    {
        UploadedFile file = UploadedFile.FromHttpPostedFile(Request.Files[ru.UniqueID]);
    }

When I set my debug point on the line UploadedFile file = ...  then I see the error "object reference nots et to an instance of an object.

[Genady Sergeev]

Hi Joeri,

You need to use RadUpload.UploadedFiles collection instead UploadedFile.FromHttpPostedFile. Example:

UploadedFile file = RadUpload1.UploadedFiles[0];
string fileName = file.GetName();

You can refer to this online demo as well.

Kind regards,
Genady Sergeev
the Telerik team

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Check out the tips for optimizing your support resource searches.