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Ariel Octavio D'Alfeo
Asked: 2020-02-20 15:58:21 +0800 CST 2020-02-20 15:58:21 +0800 CST

Foreach of a c# object

  • 772

Good afternoon, what I am trying to do is set the attributes of a list of objects from a table with two for for the table and a foreach for the attributes of the object. I'm stuck on how to assign the value to the attribute.

 /*recorre las filas*/
        for (var j = 0; j < dt.Rows.Count; j++)
        {
            var campo = new Campo();

            /*se para en cada fila y recorre las columnas*/
            for (var i = 0; i < dt.Columns.Count; i++)
            {

                var nombreCampo = dt.Columns[i].Caption;

                /*recorro las propiedades del objeto campo 
                 * y cuando nombreCampo==propertyInfo.Name 
                 * le asigno el valor de la celda segun cordenadas*/
                foreach (PropertyInfo propertyInfo in campo.GetType().GetProperties())
                {
                    if (propertyInfo.Name == nombreCampo)
                    {
                        propertyInfo.SetValue( Convert.ToString(dt.Rows[j][i]));
                    }
                }


            }

        }

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c#

2 Answers

  1. Best Answer

    If we analyze the property

    PropertyInfo.SetValue Method

    You will see that this takes two parameters, so it should be

    propertyInfo.SetValue(campo, Convert.ToString(dt.Rows[j][i]));
    • 3

  2. For each row it is necessary to create an instance of the Field class and save it in a list, otherwise you will always lose the object in each iteration.

    That as a first point. Now, to set the value of the property you need to indicate which object in the first argument while the value in the second.

    propertyInfo.SetValue(campo, dt.Rows[j][i], null);

    If you also want to do a conversion to the type of the property you can do the following

    propertyInfo.SetValue(campo, Convert.ChangeType(dt.Rows[j][i], propertyInfo.PropertyType), null);
    • 0