Question

Following code gives a red squigly under “emp.(col.ColummnName)”. Error is “identifier expected“

foreach (DataColumn col in dt.Columns)
{
   emp.(col.ColumnName) = row[(col.ColumnName)];
}

emp is a custom class with property names which correspond to column names in dataTable dt.

I suspect that I have to construct the expression differently so that I can refer to a property of class emp with results of a method call (col.ColumnName).

Any ideas will be appreciated.

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Final Answer with working function code;

public void rowToObject(ref DataRow dr, ref object myObj)
{
    foreach (DataColumn dc in dr.Table.Columns)
    {
        string colName = dc.ColumnName;
        object colValue = dr[colName];

        if (object.ReferenceEquals(colValue, DBNull.Value))
        {
            colValue = null;
        }

        PropertyInfo pi = myObj.GetType().GetProperty(colName);
        if (pi != null && colValue != null)
        {
            Type propType = null;
            Type nullableType = Nullable.GetUnderlyingType(pi.PropertyType);

            if (nullableType != null)
            {
                propType = nullableType;
            }
            else
            {
                propType = pi.PropertyType;
            }

            if (object.ReferenceEquals(propType, colValue.GetType()))
            {
                pi.SetValue(myObj, colValue, null);
            }
        }
    }
}

Answer 1

This syntax is not supported, the property name must be known at compile time. You can use reflection instead:

foreach (DataColumn col in dt.Columns)
{
   PropertyInfo prop = emp.GetType().GetProperty(col.ColumnName);
   prop.SetValue(emp, row[col.ColumnName], null);
}