public static void PopulateObjectList <T>(ValueReader reader, Dictionary <string, string> columnPropertiesMap, List <T> list)
{
List <T> retVal = list;
LinkedList <T> linkList = new LinkedList <T>();
KeyValuePair <string, Method>[] miArray = new KeyValuePair <string, Method> [(columnPropertiesMap.Count - 1) + 1];
Type entType = typeof(T);
int mapIndex = 0;
foreach (string columnName in columnPropertiesMap.Keys)
{
string property = columnPropertiesMap[columnName];
MethodInfo mi = entType.GetMethod("set_" + property);
if (mi == null)
{
throw new NotImplementedException(string.Format("Property: {0} is not implemented on Type: {1}", property, entType));
}
miArray[mapIndex++] = new KeyValuePair <string, Method>(columnName, new Method()
{
MI = mi, Type = mi.GetParameters()[0].ParameterType
});
}
while (reader.Read())
{
T entity = Reflection.CreateInstance <T>();
for (int propIndex = 0; propIndex < miArray.Length; propIndex++)
{
Method mi = miArray[propIndex].Value;
object val = reader.GetValue(miArray[propIndex].Key);
Type pt = mi.Type;
if (val == null || string.IsNullOrEmpty(val.ToString()))
{
if (mi.Type.IsValueType)
{
val = Reflection.CreateInstance <object>(mi.Type);
}
else
{
val = null;
}
}
if (val != null && mi.Type.IsGenericType && mi.Type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
val = Convert.ChangeType(val, mi.Type.GetGenericArguments()[0]);
}
mi.MI.Invoke(entity, BindingFlags.SetProperty, null, new object[] { val }, CultureInfo.CurrentCulture);
}
linkList.AddLast(entity);
}
retVal.Capacity = (retVal.Count + linkList.Count) + 10;
foreach (T entity in linkList)
{
retVal.Add(entity);
}
linkList.Clear();
if (retVal.Count > 1000)
{
GC.Collect(2, GCCollectionMode.Forced);
}
}
public static List <T> PopulateObjectList <T>(ValueReader reader, string columnName)
{
List <T> retVal = new List <T>();
while (reader.Read())
{
retVal.Add((T)reader.GetValue(columnName));
}
return(retVal);
}
public static T PopulateObject <T>(ValueReader reader, Dictionary <string, string> columnPropertiesMap)
{
T retVal = default(T);
if (reader.Read())
{
retVal = Reflection.CreateInstance <T>();
Type retType = typeof(T);
foreach (string columnName in columnPropertiesMap.Keys)
{
string property = columnPropertiesMap[columnName];
MethodInfo mi = retType.GetMethod("set_" + property);
if (mi == null)
{
throw new NotImplementedException(string.Format("Property: {0} is not implemented on Type: {1}", property, retType));
}
Type pt = mi.GetParameters()[0].ParameterType;
object val = reader.GetValue(columnName);
if (val == null || string.IsNullOrEmpty(val.ToString()))
{
if (pt.IsValueType)
{
val = Reflection.CreateInstance <object>(pt);
}
else
{
val = null;
}
}
if (val != null && pt.IsGenericType && pt.GetGenericTypeDefinition() == typeof(Nullable <>))
{
val = Convert.ChangeType(val, pt.GetGenericArguments()[0]);
}
mi.Invoke(retVal, BindingFlags.SetProperty, null, new object[] { val }, CultureInfo.CurrentCulture);
}
}
return(retVal);
}