StrataFrame Forum » StrataFrame Application Framework - V1 » Business Objects and Data Access (How do I?) » How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ross L. Rooker, Sr. — Wed, 10 Aug 2011 17:14:16 GMT

Lets say I want to add a property called RequiredAuditFields that does exactly what the RequiredFields. IE... a collection of collumns. What is the code to do this?

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ross L. Rooker, Sr. — Wed, 10 Aug 2011 17:14:16 GMT

The property "AuditFields" does now appear on the BOs that inherit from the Base BO but the caption "Collection" does not show and when I click on the eclips I get the follow error:

"An error occurred while attempting to load this type editor: Object reference not set to an instance of an object."

Again, my hope here, is that you may be able to provide any information that may assist. I have successfully integrating the Auditing into our BaseBO as well as a ActivityLog viewer. My last goal is the creating of a property to allow the user to select none or select what fields they want to include. In addition I have some other plans for this but need to know what I may need to consider.

public class AuditField : IRequiredField

{

#region

" Declare Privates "

private string _FieldName;

#endregion

private SqlDbType _FieldType;

#region

" Declare Public Properties "

/// <summary>

/// The field name that is required

/// </summary>

/// <value></value>

/// <remarks></remarks>

public string FieldName

{

get { return _FieldName; }

set { _FieldName = value; }

}

/// <summary>

/// The data type of the required field

/// </summary>

/// <value></value>

/// <remarks></remarks>

public SqlDbType FieldType

{

get { return _FieldType; }

set { _FieldType = value; }

}

#endregion

}

[

Category(BUSINESSRULES_CATEGORY_NAME), Description("The AuditFieldsCollection that defines the fields within the business object that are required. If a required field is not populated, then a broken rule will be automatically added to the business object."), DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(Constants.TE_RequiredFieldsEditor, typeof(UITypeEditor))]

public virtual RequiredFieldsCollection AuditFields

{

get

{

return _AuditFields;

}

set { _AuditFields = value; }

}

private

void ResetAuditFields()

{

_AuditFields =

new RequiredFieldsCollection();

}

private

bool ShouldSerializeRequiredFields()

{

return this._AuditFields.Count > 0;

}

[

Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]

protected

virtual new string AllFieldNames

{

get

{

throw new NotImplementedException("A class derived from " + typeof(BusinessLayer).FullName + " must override the property 'AllFieldNames'");

}

}

public

class AuditFieldsCollection : System.Collections.CollectionBase, IRequiredFieldsCollection

{

public AuditFieldsCollection()

{

}

public void Add(IRequiredField Item)

{

InnerList.Add(Item);

}

public void Remove(AuditField Item)

{

InnerList.Remove(Item);

}

public bool Contains(AuditField Item)

{

return InnerList.Contains(Item);

}

public AuditField this[int Index]

{

get { return (AuditField)InnerList[Index]; }

set { InnerList[Index] = value; }

}

public void AddRange(AuditField[] Items)

{

InnerList.AddRange(Items);

}

public AuditField[] GetValues()

{

//-- Establish Locals

AuditField[] loReturn = null;

// ERROR: Not supported in C#: ReDimStatement

InnerList.CopyTo(0, loReturn, 0, InnerList.Count);

return loReturn;

}

protected override void OnInsert(int index, object value)

{

base.OnInsert(index, value);

}

public IRequiredField[] ToArray()

{

//-- Establish Locals

System.Collections.Generic.

List<RequiredField> loArray = new System.Collections.Generic.List<RequiredField>();

//RequiredField loItem = default(RequiredField);

foreach (RequiredField loItem in List)

{

loArray.Add(loItem);

}

return loArray.ToArray();

}

public new void Clear()

{

InnerList.Clear();

}

}

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ross L. Rooker, Sr. — Wed, 10 Aug 2011 17:04:50 GMT

Forget my last post for now. I just got past this.

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ross L. Rooker, Sr. — Wed, 10 Aug 2011 16:55:59 GMT

I am not trying to create a new UITypeEditor but just trying to use the same one used by StrataFrame.

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ross L. Rooker, Sr. — Wed, 10 Aug 2011 16:53:11 GMT

Before I abandon this I was hoping that you may be able to shed some light on this?

The type or namespace name 'UITypeEditor' could not be found (are you missing a using directive or an assembly reference?)

I placed this in my BO Base, along with other code that seems to be working but when it comes to this line I get this error above.

Here are my USING statements in the BaseBO:

using

MicroFour.StrataFrame.Business;

using

System;

using

System.Collections;

using

System.Collections.Generic;

using

System.ComponentModel;

using

System.Data;

using

System.Data.SqlClient;

using

System.Runtime.Serialization;

using

System.Text;

using

MicroFour.StrataFrame.Security;

using

System.Diagnostics;

using

Microsoft.VisualBasic;

using

System.ComponentModel.Design;

using

System.Collections.Specialized;

using

System.Reflection;

using

System.Runtime.InteropServices.ComTypes;

using

MicroFour.StrataFrame.UI.Windows.Forms;

using

MicroFour.StrataFrame.Extensibility;

using

System.Drawing.Design;

[Category(BUSINESSRULES_CATEGORY_NAME), Description("The AuditFieldsCollection that defines the fields within the business object that are required. If a required field is not populated, then a broken rule will be automatically added to the business object."), DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(Constants.TE_RequiredFieldsEditor, typeof(UITypeEditor)]

public virtual RequiredFieldsCollection AuditFields

{

Get

{

return _AuditFields;

}

set { _AuditFields = value; }

}

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Keith Chisarik — Wed, 10 Aug 2011 12:55:17 GMT

FYI, I ended up implementing the collection property without the editor, it proved a bit more work with the VS integration than I was willing to invest at the time, if you go down that road all the way, it would be great if you share your results :)

RE: How to add a property to BO that inherit from a base bo as a collection like RequiredFields.

Ivan George Borges — Wed, 10 Aug 2011 09:03:08 GMT

Hi Ross.

Here is a thread that could get you started:

http://forum.strataframe.net/FindPost27609.aspx