[C#][WinForm] 제너릭 list 를 CSV string으로 변경

[C#][WinForm] 제너릭 list 를 CSV string으로 변경

- 다양한 string 형태로 응용 가능

// // 출처 : https://garvincasimir.wordpress.com/2012/08/16/extension-method-for-converting-generic-lists-to-csv-in-c/ // public string ToCSV<T>(IEnumerable<T> list) { var type = typeof(T); var props = type.GetProperties(); //Setup expression constants var param = Expression.Parameter(type, "x"); var doublequote = Expression.Constant("\""); var doublequoteescape = Expression.Constant("\"\""); var comma = Expression.Constant(","); //Convert all properties to strings, escape and enclose in double quotes var propq = (from prop in props let tostringcall = Expression.Call(Expression.Property(param, prop), prop.ReflectedType.GetMethod("ToString", new Type[0])) let replacecall = Expression.Call(tostringcall, typeof(string).GetMethod("Replace", new Type[] { typeof(String), typeof(String) }), doublequote, doublequoteescape) select Expression.Call(typeof(string).GetMethod("Concat", new Type[] { typeof(String), typeof(String), typeof(String) }), doublequote, replacecall, doublequote) ).ToArray(); var concatLine = propq[0]; for (int i = 1; i < propq.Length; i++) concatLine = Expression.Call(typeof(string).GetMethod("Concat", new Type[] { typeof(String), typeof(String), typeof(String) }), concatLine, comma, propq[i]); var method = Expression.Lambda<Func<T, String>>(concatLine, param).Compile(); var header = String.Join(",", props.Select(p => p.Name).ToArray()); return header + Environment.NewLine + String.Join(Environment.NewLine, list.Select(method).ToArray()); }