Click-Once Applications and URL Parameters

We have a number of .Net 2.0 Windows applications that are to be converted to Click-Once deployed applications. The problem that we had was that these applications are launched with command line parameters, which are not available when running off the web using Click-Once deployment. So the solution was to grab the same parameters from the URL query string parameters. No problem just use the following code to grab and parse them. The real problem came later.

public NameValueCollection GetQueryStringParameters()
{
NameValueCollection nameValueTable = new NameValueCollection();

if (ApplicationDeployment.IsNetworkDeployed)
{
if (ApplicationDeployment.CurrentDeployment.ActivationUri != null)
{
string queryString = ApplicationDeployment.CurrentDeployment.ActivationUri.Query;

if (!string.IsNullOrEmpty(queryString))
{
nameValueTable = HttpUtility.ParseQueryString(queryString);
}
}
}

return (nameValueTable);
}

When I went to run this code on my local machine as Click-Once, I wasn't getting any thing in the ActivationUri. It was null all the time. As it turns out you have to modify your project properties to allow it like so:

1. Right-click your project
   
2. Select "Properties"
3. Select the "Publish" tab
4. Click the "Options" button
5. Check "Allow URL parameters to be passed to application"
6. Click "OK"
7. Re-publish your application

Your application should now be able to get the ActivationUri.