public Elem AppendElemValue(string InText)
{
// store the element value.
if (mElemValue != null)
{
throw new ApplicationException("element already has a value");
}
mElemValue = InText;
// this element has a currently open sub element. Before adding
// the value to the xml string, have to close the sub element.
if (mCurrentSubElem != null)
{
mCurrentSubElem.CloseElem();
mCurrentSubElem = null;
}
if (mOpenUnitIsClosed == false)
{
AppendOpenUnitClose();
}
string encodedValue = XmlStream.EncodeXmlString(mElemValue);
mXmlString.AppendEncodedText(encodedValue);
return(this);
}
public Elem AppendAttribute(string InName, string InValue)
{
if (mOpenUnitIsClosed == true)
{
throw new ApplicationException(
"xml elem open unit is closed. No more attributes allowed.");
}
mXmlString.AppendEncodedText(InName + "=");
mXmlString.AppendEncodedText("\"" + XmlStream.EncodeXmlString(InValue) + "\" ");
return(this);
}
/// <summary>
/// The element and its child elements in xml stream string form.
/// </summary>
/// <returns></returns>
public override string ToString()
{
if (ValueForm == ValueForm.Attribute)
{
string encodedValue = XmlStream.EncodeXmlString(ElemValue);
return(ElemName + "=\"" + encodedValue + "\"");
}
// only the top level root element is unnamed.
else if (ElemName == null)
{
return(ToString_RootElem());
}
else
{
return(ToString_NonAttributeElem());
}
}
// An attribute in the xml element is the name=value string that follows the
// xml element name. A non attribute elem does not have any such attributes.
// ( the XmlElem class does not yet support attributes )
private string ToString_NonAttributeElem()
{
StringBuilder sb = new StringBuilder();
// start the xml elem.
sb.Append("<" + ElemName + " ");
// add the Attribute child elements to the string.
bool nonNmvChildElems = false;
foreach (XmlElem child in this)
{
if (child.ValueForm == ValueForm.Attribute)
{
sb.Append(child.ToString());
}
else
{
nonNmvChildElems = true;
}
}
// no value, no child elems. Close out this end node elem.
if ((nonNmvChildElems == false) && (ElemValue == null))
{
sb.Append("/>");
}
else
// close out the open unit.
{
sb.Append(">");
// followed by the element value
if (ElemValue != null)
{
sb.Append(XmlStream.EncodeXmlString(ElemValue));
}
// next, the non named value sub elements.
if (nonNmvChildElems == true)
{
sb.Append(Environment.NewLine);
foreach (XmlElem child in this)
{
if (child.ValueForm != ValueForm.Attribute)
{
sb.Append(child.ToString());
sb.Append(Environment.NewLine);
}
}
if (sb.Tail(2) != Environment.NewLine)
{
sb.Append(Environment.NewLine);
}
}
// the close unit.
sb.Append("</" + ElemName + ">");
}
return(sb.ToString());
}
