public static IEnumerable <T> ConvertToEntityCollection <T>(this DataTable dt) where T : new()
{
if (dt == null || dt.Rows.Count == 0)
{
return(Enumerable.Empty <T>());
}
IList <T> entities = new List <T>();
IEnumerable <PropertyInfo> properties = typeof(T).GetProperties();
for (int i = 0; i < dt.Rows.Count; i++)
{
T entity = new T();
foreach (PropertyInfo property in properties)
{
var attributes = property.GetCustomAttributes(typeof(EntityPropertyExtensionAttribute), false);
if (attributes != null && attributes.Any())
{
EntityPropertyExtensionAttribute attribute = (EntityPropertyExtensionAttribute)attributes.First();
for (int j = 0; j < dt.Columns.Count; j++)
{
if (dt.Columns[j].ColumnName == attribute.DBTableColumnName)
{
property.SetValue(entity, dt.Rows[i][j].ConvertSimpleType(property.PropertyType), null);
break;
}
}
}
}
entities.Add(entity);
}
return(entities);
}
public static DataTable ConverToTable <T>(this IEnumerable <T> collection, DataTable dt)
{
if (collection == null || !collection.Any())
{
return(dt);
}
IEnumerable <PropertyInfo> properties = typeof(T).GetProperties();
foreach (T entity in collection)
{
DataRow dr = dt.NewRow();
foreach (PropertyInfo property in properties)
{
var attributes = property.GetCustomAttributes(typeof(EntityPropertyExtensionAttribute), false);
if (attributes != null && attributes.Any())
{
EntityPropertyExtensionAttribute attribute = (EntityPropertyExtensionAttribute)attributes.First();
for (int i = 0; i < dt.Columns.Count; i++)
{
if (dt.Columns[i].ColumnName == attribute.ViewTableColumnName)
{
object val = property.GetValue(entity, null);
if (val == null)
{
dr[dt.Columns[i].ColumnName] = string.Empty;
break;
}
if (!string.IsNullOrEmpty(attribute.ToStringVal))
{
MethodInfo mInfo = property.PropertyType.GetMethod("ToString",
BindingFlags.Public | BindingFlags.Instance,
null,
CallingConventions.Any,
new Type[] { typeof(string) },
null);
if (mInfo != null)
{
dr[dt.Columns[i].ColumnName] = mInfo.Invoke(val, new[] { attribute.ToStringVal });
}
else
{
dr[dt.Columns[i].ColumnName] = val.ToString();
}
}
else
{
dr[dt.Columns[i].ColumnName] = val.ToString();
}
break;
}
}
}
}
dt.Rows.Add(dr);
}
return(dt);
}
