List of Value Pairs in Scripted Business Object

I have scripted business object with the following interfaces:

IDataSetAccess, IPagedAccess, IIndexedAccess, ISupportRefill

This scripted business object calls a web service and creates a table with two columns.

I would like to use the values in those columns as a list of Value-Pairs that I can use in some dropdown fields in my forms. I can set up this up in Designer (as per the screenshot below)

but when I try to deploy my solution I get the following error message:

Error 06/07/2012 19:01:42 SIMS 'Metastorm.Runtime.Models.LibLPLookAndFeel.bosGetCodePairFromLocalSource' does not contain a definition for 'GetColumns' and no extension method 'GetColumns' accepting a first argument of type 'Metastorm.Runtime.Models.LibLPLookAndFeel.bosGetCodePairFromLocalSource' could be found (are you missing a using directive or an assembly reference?) 3347 56

I have tried to make up a 'GetColumns' method to provide the contents thatnI want to expose as value pairs, but I am not successful. I have checked the Designer guide, this forum and Google and I have not found any references to this GetColumns method.

Any idea about how to resolve this problem?

Thanks in advance.

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Comments

Iain_Lindsay

Hi Xavi

Looks like to use GetColumns you also need to implement IColumnAccess

However I recommend speaking to the helpdesk about this to confirm that it is just a documentation oversight and we do support using this interface from a scripted business object.

Thanks

iain

Francisco De la Fuente Badillo

Where can found documentation about this IColumnAccess interface?

Jerome_Pearce

It is a great deal easier to use a function to return a name-vale pair list. Unless you specifically need the caching abilities of a scripted Business Object, I would recommend looking at a simple function.

Ryan Saul

Hi,

I am experiencing the same error on my scripted BO, which is populating a value-name pair dropdown.

Error 26/09/2013 4:19:16 PM RVProject 'Metastorm.Runtime.Models.EliteLibrary.qryEliteSiteAddress' does not contain a definition for 'GetColumns' and no extension method 'GetColumns' accepting a first argument of type 'Metastorm.Runtime.Models.EliteLibrary.qryEliteSiteAddress' could be found (are you missing a using directive or an assembly reference?) 7083 72

Has anyone found a solution for this error?

Thanks.

#region Using Statement

using System;
using System.Data;
using System.Collections.Generic;
using Metastorm.Ide.Extensibility;
using Metastorm.Runtime.Core;
using Metastorm.Runtime.Types;
using System.ComponentModel;
using Metastorm.Runtime.Contracts.Mbo;
using Metastorm.Runtime.Core.Mbo;
using System.Linq;

#endregion Using Statement

//Change this to a namespace that will suit you
namespace Metastorm.Runtime.Models.EliteLibrary
{
  /// <summary>
  /// This needs to be a class or an interface that will support public, static methods/properties
  /// </summary>
  public abstract class EliteBOSiteAddress : IDataSetAccess, ISupportRefill
 {


    private DataSet data = null;


    private MboConnection connection = null;
    private MboConnectionInfo connectioninfo = null;


    public EliteBOSiteAddress()
    {
        connection = new EngineMboConnection();

        // Attach to the cache events
        CacheHelper.LoadFromCache += LoadDataFromCache;
        CacheHelper.SaveToCache += SaveDataToCache;

        // Retrieve any previously cached data
        LoadDataFromCache(this, EventArgs.Empty);
    }

    #region Parameters

    public abstract Metastorm.Runtime.Types.Text configId { get; }
    public abstract Metastorm.Runtime.Types.Text clientNumber { get; }


    #endregion

    #region IDataSetAccess Members


    public System.Data.DataSet Read()
    {
        if (data == null)
        {
            string query = "SELECT SiteIndex, AddressFull FROM SiteAddressIndexView inner join Client on ClientIndex=PMSEntityIndex  where altnumber='"+clientNumber+"'";
            string confId = configId;
            if(confId.IndexOf("PROD")>0)
                data = Mstm.SelectSql(new MDD_PROD(), query, null).GetDataSet();
            else
                data = Mstm.SelectSql(new MDD_DEV(), query, null).GetDataSet();
            //data.Tables[0].PrimaryKey = new DataColumn[] {data.Tables[0].Columns["CCE_Key"]};         
            data.AcceptChanges();

        }
        return data;
    }


    public void Write(System.Data.DataSet dataSet)
    {
        if (dataSet.HasChanges())
            data.Merge(dataSet.GetChanges());
    }
    #endregion

    #region IEditableAccess Members


    public virtual bool ReadOnly
    {
        get { return false; }
    }


    public void Commit()
    {
        if (data.HasChanges())
        {
            DataSet cambios = null;

            cambios=data.GetChanges();

            this.connection.Update(cambios);                
        }
    }

    #endregion


    #region Variables


    public virtual Metastorm.Runtime.Types.Text AddressFull {
        get { return GetField<string>("AddressFull"); }
        set { SetField<string>("AddressFull", value); }
    }
    public virtual Metastorm.Runtime.Types.Text SiteIndex {
        get { return GetField<string>("SiteIndex"); }
        set { SetField<string>("SiteIndex", value); }
    }

    #endregion

    #region ISupportRefill Members


    public virtual bool AlwaysRefresh
    {
        get { return false; }
    }

    #endregion

    #region Helper methods

    private T GetField<T>(string fieldName)
    {
        if (data == null) this.Read();

        if (data != null && data.Tables.Count > 0 && data.Tables[0].Rows.Count > 0)
            return (T)data.Tables[0].Rows[0][fieldName];
        else
            return default(T);
    }

    private void SetField<T>(string fieldName, T value)
    {
        if (data != null && data.Tables.Count > 0 && data.Tables[0].Rows.Count > 0)
            data.Tables[0].Rows[0][fieldName] = value;
    }


    #endregion



    #region Caching events

    private void SaveDataToCache(object sender, EventArgs e)
    {
        if (data != null)
            CacheHelper.GetCachedMboState(this).Data = data;
    }

    private void LoadDataFromCache(object sender, EventArgs e)
    {
        data = CacheHelper.GetCachedMboState(this).Data;
    }

    #endregion


  }
}

Madhu_Babu_Rokkam

Adding the below methods to the scripted business object resolves the above issue. One that takes a column name and returns a list to bind to dropdown. Other returns a key value pair.

//This method helps in returning a key value pair for the dropdown based on passed inputs
    public KeyValuePair<KeyT, ValueT>[] GetColumns<KeyT, ValueT>(string keyColumnName, string valueColumnName)
    {
        if (data == null)
            this.Read();

        if(data.Tables.Count == 0)
            return new KeyValuePair<KeyT, ValueT>[0];

        List<KeyValuePair<KeyT, ValueT>> result = new List<KeyValuePair<KeyT, ValueT>>();

        DataTable table = data.Tables[0];

        DataColumn keyColumn = table.Columns[keyColumnName];
        DataColumn valueColumn = table.Columns[valueColumnName];

        foreach (DataRow row in table.Rows)
            result.Add(new KeyValuePair<KeyT, ValueT>(
              ConvertDBValue<KeyT>(row[keyColumn]),
              ConvertDBValue<ValueT>(row[valueColumn])));

        return result.ToArray();
    }

    private T ConvertDBValue<T>(object value)
    {
      if (value is DBNull)
        return ValueHelper.TryGetValue<T>(null);
      return ValueHelper.TryGetValue<T>(value);
    }

    //The method helps in returning a key value pair for the dropdown based on passed inputs
    public List GetColumns(string columnName)
    {
        if (data == null)
            this.Read();

        if(data.Tables.Count == 0)
            return null;

        List ddllist = new List();
        if(data.Tables.Count > 0)
        {
            ddllist = data.Tables[0].GetFields<string>(columnName).ToArray();
        }
        return ddllist;
    }

Ryan Saul

Hi Madhu,

Thank you kindly for the additional code!

I have it all working now.

Best regards,

Ryan