Question

This must be simple and I’m being incredibly dense but I can’t find an example to help me figure it out. I want to filter my list of tblAsset items by their assessmentId which is passed in through a parameter. I’m able to get the parameter value ok, but I’m not sure how to write the query.

My model is built from an existing Database using the Model creation wizard.

Thanks for any help!

public IEnumerable<tblAsset> GettblAssets()
{
  NameValueCollection nvc = HttpUtility.ParseQueryString(Request.RequestUri.Query);
  var assessmentId = nvc["aid"];

  //limit the assets by assessmentId somehow and return
}

Answer 1

You could use the .Where extension method on the IQueryable<tblAsset> instance returned by your database:

public IEnumerable<tblAsset> GettblAssets()
{
    NameValueCollection nvc = HttpUtility.ParseQueryString(Request.RequestUri.Query);
    var assessmentId = nvc["aid"];

    // TODO: you might need to adjust the property names of your model accordingly
    // Also if the assessmentId property is an integer on your model type
    // you will need to parse the value you read from the request to an integer
    // using the int.Parse method
    return db.tblAsset.Where(a => a.assessmentId == assessmentId);
}