Unable to upload images Object Reference not set to an instance

Vote:

Hi guys,

I tried to upload a png file to cms through the asset pane.

Login --> Edit --> Asset Pane --> For All Sites --> Media --> Upload Files --> select the png file (2.8 KB) --> Failed with msg 'Object Reference not set to an instance'

Any advice would be appreciated.

Thanks

#286112

Aug 25, 2022 12:28

Surjit Bharath

Vote:

Hi KK, The stack trace should hopefully show up in the logs to help you along.

#286113

Aug 25, 2022 13:13

KK - Aug 25, 2022 15:17

Thanks Surjit. Can I ask how to get the stack trace?

Surjit Bharath - Aug 25, 2022 15:56

Do you have a log writer setup? Look at the output logs?
If not, are you running kestrel? You'll be able to see the stack trace just after the error in the console where kestrel is running.

Are you getting the error on DXP? Take a look at live viewer on paasportal.

Minesh Shah (Netcel)

Vote:

Have you got the Content Model setup to accept an png file.

e.g.

using EPiServer.Framework.DataAnnotations;
using ImagePointEditor;
using System.ComponentModel.DataAnnotations;

namespace Temp5.Models.Media;

[ContentType(GUID = "0A89E464-56D4-449F-AEA8-2BF774AB8730")]
[MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,ico,gif,bmp,png")]
public class ImageFile : ImageData
{
    /// <summary>
    /// Gets or sets the copyright.
    /// </summary>
    /// <value>
    /// The copyright.
    /// </value>
    public virtual string Copyright { get; set; }

    [UIHint(ImagePoint.UIHint)]
    [Display(Name = "Focal point")]
    public virtual string ImageFocalPoint { get; set; }
}

See here for documentation on the subject : Media types and templates (optimizely.com)

#286115

Edited, Aug 25, 2022 13:52

Pär Wissmark

Vote:

I have the same issue, got the mediatypes registered as well. If I start an empty Optimizely project i get the same result, also after adding the mediatypes. Alloy and Foundations works fine.

#299394

Apr 02, 2023 10:02

Minesh Shah (Netcel) - Apr 02, 2023 22:49

Can you share the source code of the Media File Model please ?

Pär Wissmark

Vote:

[ContentType(GUID = "7182DAC0-33F2-441E-AEDF-0C3259D49DBC")]
[MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,gif,bmp,png")]
public abstract class SiteImageData : ImageData
{
    [Display(
        Order = 10)]
    [CultureSpecific]
    public virtual string Alt { get; set; }
}

#299438

Edited, Apr 03, 2023 7:32

Eric Herlitz

Vote:

@Pär remove the abstract declaration from your class.

[ContentType(GUID = "7182DAC0-33F2-441E-AEDF-0C3259D49DBC")]
[MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,gif,bmp,png")]
public class SiteImageData : ImageData
{
    [Display(
        Order = 10)]
    [CultureSpecific]
    public virtual string Alt { get; set; }
}

#299440

Apr 03, 2023 7:44

Pär Wissmark

Vote:

Thanks Eric, worked like a charm!

#299446

Apr 03, 2023 10:40

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Unable to upload images Object Reference not set to an instance