I wrote some VB code that I converted to C# using Sharp Develop IDE.
I defined an Interface, IElement
, that is implemented by objects that return XML representations of themselves. Any object that implements this interface should be able to return its TagName and it's XML string representation. To get the it's XML string, it may have to loop through its child/nested collection to get the XML representation of all of its child objects.
Classes that inherit from Element can use the GetXml and GetNestedXml of its base class or choose to override it but the GetNestedXml function would not need to be public because it would only be called from the public GetXml function of derived classes. Therefore, in the original VB version, the scope of the GetNestedXML was set to protected. However, Sharp Develop and I have issues trying to convert this code to C#. Please see the error below.
On a side note, I do realize that there might be better ways to implement this and I would be interested in side suggestions that are easy on flames. :-) Thanks.
Public Interface IElement
ReadOnly Property TagName() As String
ReadOnly Property GetXml(Optional ByVal targetXml As Integer = TargetXmlEnum.All) As String
Function GetNestedXml() As String
End Interface
Public Class Element
Implements IElement
Public ReadOnly Property TagName() As String Implements IElement.TagName
Get
'....
End Get
End Property
Public Overridable ReadOnly Property GetXml(Optional ByVal targetXml As Integer = TargetXmlEnum.All) _
As String Implements IElement.GetXml
Get
'....
End Get
End Property
Protected Overridable Function GetNestedXml() As String Implements IElement.GetNestedXml
'....
End Function
End Class
Converted C# :
public interface IElement
{
string TagName { get; }
string GetXml { get; }
string GetNestedXml();
}
public class Element : IElement
{
public string TagName {
get { //... }
}
public virtual string GetXml
{
get
{
//...
}
}
protected virtual string GetNestedXml()
{
//...
}
}
error:
Error 1 'Smit.SpreadsheetML.Element' does not implement interface member 'Smit.SpreadsheetML.IElement.GetNestedXml()'. 'Smit.SpreadsheetML.Element.GetNestedXml()' cannot implement an interface member because it is not public. D:\Users\Chad\Desktop\SMIT\SMIT.SpreadsheetML.ConvertedToC#\Element.cs 41 24 Smit.SpreadsheetML.Converted
As Interface implementations need to be public or explicit:
change this method
protected virtual string GetNestedXml()
{
//...
}
to
protected virtual string IElement.GetNestedXml()
{
//...
}
Edit
create an Interface like this:
public interface IElement
{
string TagName { get; }
string GetXml { get; }
}
create an abstract base class like this
abstract class ElementBase:IElement
{
public abstract string TagName { get; }
public abstract string GetXml { get; }
protected abstract string GetNestedXml();
}
Impelement your Element class
public class Element : ElementBase
{
public override string TagName {
get { //... }
}
public override string GetXml
{
get
{
//...
}
}
protected override string GetNestedXml()
{
//...
}
}
An interface declared the responsibilities of its all inheriting instances. So you can not use not-public method to implement your interface method.
If it is non-public for any reason else, I suggest that you can use abstract class and use a abstract/virtual method to declare it.
abstract method like this:
public interface IElement
{
string TagName { get; }
string GetXml { get; }
}
public abstract class ElementBase : IElement
{
public string TagName { get; private set; }
public string GetXml { get; private set; }
protected abstract string GetNestedXml();
}
virtual method:
public interface IElement
{
string TagName { get; }
string GetXml { get; }
}
public abstract class ElementBase : IElement
{
public string TagName { get; private set; }
public string GetXml { get; private set; }
protected virtual string GetNestedXml()
{
throw new NotImplementedException();
}
}
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