Value cannot be null. Parameter name : key

[Marc Roussel]

Hi,

When I press the button Upload I get the error "Value cannot be null".  I've looked everywhere but unable to find the OnFileUploadCompleted and I don't know what to look for. Could you give me a hint on this ?  After the files are selected which they all appear in the list,  There's no errors and nothing seems to be wrong until I press UPLOAD.

Value cannot be null.
Parameter name: key
   at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.ContainsKey(TKey key)
   at Telerik.Windows.Controls.RadUpload.OnFileUploadCompleted(Object sender, EventArgs e)

Here's the parameters I did set for the RadUpload

<telerik:RadUpload
    Grid.Column="1" x:Name="RadUpload1" Margin="0"
    Filter="Image Files (*.jpg;*.jpeg;*.png)| *.jpg;*.jpeg;*.png"
    FilterIndex="0" MaxFileCount="500"
    AllowDrop="true" Width="Auto"
    IsAutomaticUpload="false"
    OverwriteExistingFiles="True"
    UploadServiceUrl="../receiver.ashx"
    IsAppendFilesEnabled="True"
    FileUploadStarting="RadUpload1_FileUploadStarting"
    FileUploaded="RadUpload1_FileUploaded"
    UploadStarted="RadUpload1_UploadStarted"
    MaxFileSize="12000000" MaxUploadSize="900000000" SelectionMode="Multiple"
    MinWidth="0" MinHeight="0" MaxHeight="Infinity" Style="{StaticResource
    RadUploadStyle1}" TargetFolder="~/ClientBin/Photos" BufferSize="900000000" />

[Marc Roussel]

I did remove the BufferSize I did set and it worked.  Could you explain how I can make this buffer huge without having the error ?

[Alex Fidanov]

Hello Marc Roussel,

I belive the default POST request buffer size is around 2mb. If you want to use a larger size, then you have to configure the server to be able to accept larger requests. To enable this, you have to add the following line in the web.config file -> system.web section: For example, this will allow 10mb buffer size :

<httpRuntime maxRequestLength="10000000" executionTimeout="3600" />

Let me know if that works for you.

Greetings,
Alex Fidanov
the Telerik team

[Marc Roussel]

Oh thank you.
Works fine.