Customizing Dump in a DataContext package

Sirozha1337

Hi, I'm having an issue with the ToDump function inside a DataContext package. I'm creating a static method as per documentation but it doesn't seem to be called and the output does not get formatted the way I want it to.

Example:

public sealed class MongoDriver : DynamicDataContextDriver
{
        public static object ToDump(object input)
        {
            var document = input as BsonDocument;
            return document != null ? BsonTypeMapper.MapToDotNetValue(document) : input;
        }

        // unrelated code here
}

Is there something I'm missing or is this a limitation of the DataContext?

i2van

static object ToDump(object input) should be in Program context and not in class, (example).

It should be member method in your case, (example).

JoeAlbahari

The static ToDump method applies to scripts and My Extensions - not drivers.

With drivers, you instead override the PreprocessObjectToWrite method. This is described in the documentation:
https://www.linqpad.net/Extensibility.aspx

Sirozha1337

@JoeAlbahari said:
The static ToDump method applies to scripts and My Extensions - not drivers.

With drivers, you instead override the PreprocessObjectToWrite method. This is described in the documentation:
https://www.linqpad.net/Extensibility.aspx

Oh, I see. Thank you, Joseph!

For those that might come after, I've achieved what I wanted with just a small modification of my code:

public sealed class MongoDriver : DynamicDataContextDriver
{
        public override void PreprocessObjectToWrite(ref object objectToWrite, ObjectGraphInfo info)
        {
            var document = objectToWrite as BsonDocument;
            if (document != null)
            {
                objectToWrite = BsonTypeMapper.MapToDotNetValue(document);
                return;
            }
        }

        // unrelated code here
}