XML Dynamic Object and IEnumberables
-
25-06-2021 - |
문제
I am having some issues with my DynamicXML object, it is parsing XML great, and for single elements works great, but when I have multiple children elements its falling over. I am obviously missing something, but I dont know what.
Here is the class:
public class DynamicXml : DynamicObject
{
readonly XElement element;
public DynamicXml(string xml)
{
element = XElement.Parse(xml);
}
public DynamicXml(XElement xElement)
{
element = xElement;
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (element == null)
{
result = null;
return false;
}
var sub = element.Element(binder.Name);
if (sub == null)
{
result = null;
return false;
}
else
{
result = new DynamicXml(sub);
return true;
}
}
public override string ToString()
{
return element != null ? element.Value : string.Empty;
}
public override bool TryConvert(ConvertBinder binder, out object result)
{
try
{
result = Convert.ChangeType(element.Value, binder.ReturnType);
return true;
}
catch { }
return base.TryConvert(binder, out result);
}
}
This is how I would use it
var response = "<response><foo>some xml here</foo></response>"
result = new DynamicXml(response);
var newObj = new SumObject();
newObj.Foo = result.foo;
Now this works fine, but if my xml were:
<response>
<foo>
<bahs>
<bah>value here</bah>
<bah>value here</bah>
<bah>value here</bah>
</bahs>
</foo>
<response>
I would want to use some thing like:
for(var bahs in result.foo.bahs)
{
//magic code here
}
but this isnt what is happening I just get an error:
Cannot implicitly convert type 'DynamicXml' to 'System.Collections.IEnumerable'. An explicit conversion exists (are you missing a cast?)
Many thanks for any help.
해결책
I figured out the solution, I needed to implement IEnumerable and GetEnumerator()
here is the solution class:
public class DynamicXml : DynamicObject, IEnumerable
{
readonly XElement element;
public DynamicXml(string xml)
{
element = XElement.Parse(xml);
}
public DynamicXml(XElement xElement)
{
element = xElement;
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (element == null)
{
result = null;
return false;
}
var sub = element.Element(binder.Name);
if (sub == null)
{
result = null;
return false;
}
else
{
result = new DynamicXml(sub);
return true;
}
}
public override string ToString()
{
return element != null ? element.Value : string.Empty;
}
public IEnumerator GetEnumerator()
{
return element.Elements().Select(child => new DynamicXml(child)).GetEnumerator();
}
public override bool TryConvert(ConvertBinder binder, out object result)
{
try
{
result = Convert.ChangeType(element.Value, binder.ReturnType);
return true;
}
catch { }
return base.TryConvert(binder, out result);
}
}
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