Problem filtering Sql view in Grid

Hello Good Night. I have a problem filtering a Sql view. 

I have a grid and i want to asign the vendor name in the corresponding column when i select a new vendor. I use de FieldUpdated Event. Then event works but when i want to filter by V_CEVendors (My Sql view) , the condition not work. I did a test with the table BAccount and apply the same filter and it worked. For which I do not understand the reason that with the sql view my filter is not working

First scenario: FieldUpdated with mi SQL View V_CEVendors (not working)

• In the IdTest column I am sending the value of the selected VendorId, but when I enter the filter the “itemovista” does not return anything.
• I have checked the fields of my view and they are all correct.

    public SelectFrom<V_CEVendors>.View viewV_CEVendors;    

protected void _(Events.FieldUpdated<CEEstimateEstimate, CEEstimateEstimate.idTest> e)
    {

        var row = (CEEstimateEstimate)e.Row;



       V_CEVendors itemovista = viewV_CEVendors.Select()
                  .Where(item => item.GetItem<V_CEVendors>().Vendor_Id == row.IdTest).FirstOrDefault();

        if(itemovista!=null)
        {

          row.VendorName = itemovista.Vendor_Name;

        }
    }

Second scenario: I test with the BAccount table and it works.

• In the IdTest column I am sending the value of the selected VendorId, but when I enter the filter the “itemovista” does return the correct value.

public SelectFrom<BAccount>.View viewBAccount;    

protected void _(Events.FieldUpdated<CEEstimateEstimate, CEEstimateEstimate.idTest> e)
    {

        var row = (CEEstimateEstimate)e.Row;

             BAccount itemovista = viewBAccount.Select()
                  .Where(item => item.GetItem<BAccount>().BAccountID== row.IdTest).FirstOrDefault();



        if(itemovista!=null)
        {

          row.VendorName = itemovista.AcctName;

        }
    }

when I want to filter through the view nothing happens, does anyone know why?

Thanks for your help