Retrieving attachments from ArcGis Rest Service

AndrewWigglesworth — Thu, 27 Nov 2014 21:00:13 GMT

Hi there,

I'm pretty new to the ArcGis rest services. I'm having problems determining when an attachment exists on a feature layer, and retrieving the attachment. I'm using C#, but accessing the feature layers through ArcGis Rest API. How do i get the Query layer to return the attachments along with the features that i can access. I'm able to navigate to them through the web browser but i can't get them through the API.

Below is the C# data mapping that i have laid out, everything else returns properly but the attachments do not.

namespace DataModels

{

[DataContract]

public abstract class FeatureLayer

{

[DataMember]

public string objectIdFieldName { get; set; }

[DataMember]

public string globalIdFieldName { get; set; }

[DataMember]

public string geometryType { get; set; }

[DataMember]

public Spatialreference spatialReference { get; set; }

[DataMember]

public Field[] fields { get; set; }

}

[DataContract]

public class Spatialreference

{

[DataMember]

public int wkid { get; set; }

[DataMember]

public int latestWkid { get; set; }

}

[DataContract]

public class Field

{

[DataMember]

public string name { get; set; }

[DataMember]

public string type { get; set; }

[DataMember]

public string alias { get; set; }

[DataMember]

public string sqlType { get; set; }

[DataMember]

public Domain domain { get; set; }

[DataMember]

public object defaultValue { get; set; }

[DataMember]

public int length { get; set; }

}

[DataContract]

public class Domain

{

[DataMember]

public string type { get; set; }

[DataMember]

public string name { get; set; }

[DataMember]

public Codedvalue[] codedValues { get; set; }

}

[DataContract]

public class Codedvalue

{

[DataMember]

public string name { get; set; }

[DataMember]

public string code { get; set; }

}

[DataContract]

public abstract class Feature

{

[DataMember]

public Geometry geometry { get; set; }

[DataMember]

public Boolean hasAttachments { get; set; }

[DataMember]

public AttachmentInfos attachmentInfo { get; set; }

}

[DataContract]

public abstract class Attributes

{

[DataMember]

public int OBJECTID { get; set; }

}

[DataContract]

public class Geometry

{

[DataMember]

public float x { get; set; }

[DataMember]

public float y { get; set; }

}

[DataContract]

public class AttachmentInfos

{

[DataMember]

public Attachments[] attachments;

}

[DataContract]

public class Attachments

{

[DataMember]

public string id { get; set; }

[DataMember]

public string contentType { get; set; }

[DataMember]

public int size { get; set; }

[DataMember]

public string name { get; set; }

}

JSON query:

StringBuilder sb = new StringBuilder(requestLayer);

sb.Append("query?");

sb.Append("where=RequestID<>''&");

sb.Append("returnCountOnly=false&");

sb.Append("returnIdsOnly=false&");

sb.Append("outFields=OBJECTID,RequestID,Description,CustomerNumber,Note,Employee&");

sb.Append("token=" + token);

topic Retrieving attachments from ArcGis Rest Service in ArcGIS REST APIs and Services Questions

Retrieving attachments from ArcGis Rest Service