Generate Xml schema from c# classes

Question

I need to create a web-service that will integrate information from SAP within my organization. I have an existing application with a database structure. SAP will use the web-service to store values into the relevant tables/columns in the database.

For this, I need to provide the SAP team with an Xml schema that will be used to pass the data. Now, I do not know a lot about xml. What I did is I created Dto's based on the Entity Framework classes of all the relavent tables. This includes 8 different classes: RFQ Schema

RFQ is the base class and it can contain either an RFQGoods or an RFQServices.

Next, I attempted using the xsd.exe tool to generate a schema, but received this result:

Error: There was an error processing 'RfqService.dll'.
- There was an error reflecting type 'RfqService.DataTransferObjects.RfqDto'.
- Cannot serialize member 'RfqService.DataTransferObjects.RfqDto.RFQGoods' of
type 'System.Collections.Generic.ICollection1[[RfqService.DataTransferObjects.RfqGoodDto, RfqService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]', see inner exception for more details. - Cannot serialize member RfqService.DataTransferObjects.RfqDto.RFQGoods of type System.Collections.Generic.ICollection1[[RfqService.DataTransferObjects.RfqGoodDto, RfqService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] because it is an interface.

I think what I need is the correct xml attributes for the classes and each of their parameters, but I do not know what attributes I need to add to make this work and haven't been able to find out. Below is the RfqDto class:

[DataContract]
public class RfqDto
{
    [DataMember]
    public int RfqId { get; set; }

    [DataMember]
    public bool IsAbove30k { get; set; }

    [DataMember]
    public string ReferenceNumber { get; set; }

    [DataMember]
    public string ContactPersonName { get; set; }

    [DataMember]
    public string ContactPersonTelephoneNumber { get; set; }

    [DataMember]
    public string ContactPersonCellPhone { get; set; }

    [DataMember]
    public string BuyerName { get; set; }

    [DataMember]
    public string BuyerTelephoneNumber { get; set; }

    [DataMember]
    public string BuyerEmailAddress { get; set; }

    [DataMember]
    public Nullable<int> QuotationBoxNumber { get; set; }

    [DataMember]
    public Nullable<int> FloorNumber { get; set; }

    [DataMember]
    public virtual ProcurementItemDto ProcurementItem { get; set; }

    [DataMember]
    public virtual ICollection<RfqGoodDto> RfqGoods { get; set; }

    [DataMember]
    public virtual ICollection<RfqServiceDto> RfqServices { get; set; }
}

score 1 · Accepted Answer · answered Jul 02 '14 at 06:41

1

Try changing your ICollection<T> members to List<T>. The error you are getting is basically telling you that you can not serialize interfaces.

answered Jul 02 '14 at 06:41

Mike Hixson

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score 0 · Answer 2 · answered Jul 02 '14 at 06:27

0

You can use EntityFrameWork for doing same.you have to add one .edmx file into your application and then you have to configure database and in Model you will find the schema of your database

Generate Xml schema from c# classes

2 Answers2