[Débutant] lambda expression invalide

Bonjour,

J'aurai besoin d'un peu d'aide car je tourne en rond depuis 2 jours.

J'ai un tableau de type:

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public BillingServices.InvoiceSetDetail[] isdList;

pour info:

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public partial class InvoiceSetDetail {
        private string serviceProviderField;
        private string invoiceNumberField;
        private string accountRefField;
        private string accountNameField;
        private string invoiceStyleField;
        private Invoice hDInvoiceField;
        private string filePathField;
        private string fileNameField;
        private bool isPrintedField;
        private STATUS statusIDField;
        private int pdfNbPagesField;
        private int pdfNbPagesMemoField;
[...]
}

sur lequel je peux appliquer 3 filtres:
Sur l'AccountName, l'AccountRef et l'InvoiceStyle.

Les 2 premiers sont des champs saisissables et le 3eme une combo.

J'aimerai donc creer mon expression en fonction de ces filtres pour avoir:

Code:

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Func<BillingServices.InvoiceSetDetail, bool> expression = GenerateAttributesDescriptionBillingToLinq(filterOptions);
IEnumerable<BillingServices.InvoiceSetDetail> test = isdList.Where(expression);

1er probleme: test est soit nul, soit me renvoie tout... j'ai essayé pas mal de chose...

Code:

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        private Func<BillingServices.InvoiceSetDetail, bool> GenerateAttributesDescriptionBillingToLinq(List<FilterOption> filterOptions)
        {
            Expression<Func<BillingServices.InvoiceSetDetail, bool>> expression = null;
            Expression<Func<BillingServices.InvoiceSetDetail, bool>> search1;
            Expression<Func<BillingServices.InvoiceSetDetail, bool>> search2;
            Expression<Func<BillingServices.InvoiceSetDetail, bool>> search3;
 
            foreach (FilterOption filterOption in filterOptions)
            {
                if ((filterOption.Type == typeof(string) && filterOption.Value == null) || filterOption.Value != "")
                {
                    if (filterOption.Name == "AccountName" && !string.IsNullOrEmpty(filterOption.Value))
                    {
                        search1 = i => i.AccountName.Contains(filterOption.Value.ToString());
                        expression = search1;
                    }
 
                    if (filterOption.Name == "BUYER_ID" && !string.IsNullOrEmpty(filterOption.Value))
                    {
                        search2 = i => i.AccountRef.Contains(filterOption.Value.ToString());
                        if (expression.Body != null)
                            expression = Expression.Lambda<Func<BillingServices.InvoiceSetDetail, bool>>(Expression.And(expression.Body, search2.Body), expression.Parameters[0]);
                        else
                            expression = search2;
                    }
 
                    if (filterOption.Name == "InvoiceStyle" && !string.IsNullOrEmpty(filterOption.Value))
                    {
                        search3 = i => i.InvoiceStyle.Contains(filterOption.Value.ToString());
                        if (expression.Body != null)
                            expression = Expression.Lambda<Func<BillingServices.InvoiceSetDetail, bool>>(Expression.And(expression.Body, search3.Body), expression.Parameters[0]);
                        else
                            expression = search3;
                    }
                }
            }
            return expression.Compile();
        }

Et 2eme pb, comment je recharge mon tableau trié depuis ma liste IEnumerable<>

Merci merci pour toute aide :)