Get Where parameters from IQueryable

I’m writing a Update extension with dynamicly input fields and it’s need to complete my update query with “where” paramters of IQueryabale source … what is way out, please! maybe that could be done in a different manner ? thanks!

… query = query.UpdateAll(properties_collection); …

public static IQueryable UpdateAll(this IQueryable source, object fields_collection) { var pairs = new List<string>(); var parameters = new Dictionary<string, object>();

        var safety_fields = GetSafeFields(fields_collection);
        var table = source.GetType().GetGenericArguments()[0].Name;

        foreach(var field in safety_fields)
        {
            var value = fields_collection.GetType().GetProperty(field).GetValue(fields_collection, null);
            var value_safe = value.IsNumericType() ? value.ToString() : value.ToLiteral();
            parameters.Add(field, value_safe);
        }

        /////////////////////////////////////////////////////////////

        IDbCommand UpdateCmd = SingletonDatabase.dbContext.CreateCommand();
        StringBuilder builder = new StringBuilder(String.Format("UPDATE {0} SET ", table));

        foreach (KeyValuePair<string, object> parameter in parameters)
        {
            builder.Append(parameter.Key).Append(" = @").Append(parameter.Key).Append(",");

            var dp = UpdateCmd.CreateParameter();
                dp.ParameterName = "@" + parameter.Key;
                dp.Value = parameter.Value;
                UpdateCmd.Parameters.Add(dp);
        }

        builder.Remove(builder.Length - 1, 1);
        builder.Append(" WHERE ");

         /////////////////////////
        ?? how to get source where paramters to complete query ??
        ////////////////////////////

        //set the command text and execute the command
        UpdateCmd.CommandText = builder.ToString();

        Console.WriteLine("B:{0}", builder.ToString());
        //UpdateCmd.ExecuteNonQuery();

        return source;
    }

[zgandrew]

sdanyliv it’s INCREDIBLE, works as sharm !! a lot of thanks for the excelent support!!!

[sdanyliv]

You can find me in skype svyatoslav.danyliv, i’m also from Ukraine