requesturl in macro property setter gives null reference exception - Extending Umbraco

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Dimitris Chrysomallis 21 posts 73 karma points

Apr 04, 2011 @ 17:01
0

request.Url in Macro property setter gives null reference exception
Hello,

We have user control in which we have a public property that sets the base url of hyperlinks.
```
public string DestinationUrl
        {
            get { return _destinationUrl; }
            set 
            {           
                _destinationUrl = Request.Url.GetLeftPart(UriPartial.Authority) + "/" + value; 
            }
        }
```
problem is that this property is never set properly. Actually, Whatever reference to Request.Url properties (when referenced from inside a public property) results in null ref exception. This does not happen when the control is used outside umbraco.

Is the Url object beinng reset?

what is the proper way to pass host, authority, path, query properties to a user control through umbraco?

Thank you

Dimitris
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Daniel Bardi 927 posts 2562 karma points

Apr 04, 2011 @ 17:27

0

You can wrap the usercontrol as a macro and expose the public properties as macro parameters.

This could solve your problem.. Pass the querystring values to the macro in a template.

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Dimitris Chrysomallis 21 posts 73 karma points

Apr 04, 2011 @ 19:02

Hi Daniel,

Thanks for your response. I have already created the macro for the control.

this is the macro:

<umbraco:Macro  Alias="MySearchResults" DestinationUrl="test-page.aspx" runat="server"></umbraco:Macro>

The trace gives me the following exception:

macro.loadControlProperties Error adding property 'JobPageUrl' with value 'test-page.aspx', maybe it doesn't exists or maybe casing is wrong!
Exception has been thrown by the target of an invocation.
  at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
  at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
  at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
  at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
  at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
  at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)
  at umbraco.macro.loadUserControl(String fileName, MacroModel model, Hashtable pageElements)

However, when i modify my control property to not reference Request.Url, it works fine.

//This works

public string JobPageUrl
        {
            get { return jobPageUrl; }
            set
            {
                jobPageUrl = value;
            }
        }

//This throws exception
 
public string JobPageUrl
        {
            get { return jobPageUrl; }
            set
            {
                jobPageUrl = Request.Url.GetLeftPart(UriPartial.Authority) + "/" + value;
            }
        }

It seems as if the Request.url object is being referenced before initialization. This does not occur when running the control in a plain asp.net app.

Any thoughts?

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Daniel Bardi 927 posts 2562 karma points

Apr 04, 2011 @ 22:40

Move the Request.Url code to the get and call the property JobPageUrl instead of the variable jobPageUrl from your code

example:

public string JobPageUrl
        {
            get { return Request.Url.GetLeftPart(UriPartial.Authority) + "/" + jobPageUrl; }
            set { jobPageUrl = value; }
        }

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request.Url in Macro property setter gives null reference exception