/// <summary>
/// 获取具体大小
/// </summary>
/// <param name="attr">特性</param>
/// <param name="clazz">类型</param>
/// <returns></returns>
private static int GetSpecificSize(AdvancedObjectMarshalAsAttribute attr, Type clazz)
{
if (attr != null && attr.SizeConst > 0)
{
return(attr.SizeConst);
}
return(ValueTypeUtils.SizeBy(clazz));
}
/// <summary>
/// 添加列表到流中
/// </summary>
private static bool AddListToStream(Type clazz, IList value, AdvancedObjectMarshalAsAttribute attr, BinaryWriter bw)
{
Type element = TypeUtils.GetArrayElement(clazz);
if (element != null)
{
if (value == null)
{
if (attr == null || attr.ArrayDoubleLength)
{
bw.Write(AdvancedObjectFormatter.As(BitConverter.GetBytes((short)-1), attr));
}
else
{
bw.Write((sbyte)-1);
}
}
else
{
int size = value.Count;
if (attr != null && attr.SizeConst > 0)
{
size = attr.SizeConst;
}
else
if (attr == null || attr.ArrayDoubleLength)
{
bw.Write(AdvancedObjectFormatter.As(BitConverter.GetBytes((short)size), attr));
}
else
{
bw.Write((sbyte)size);
}
if (TypeUtils.IsBuffer(clazz))
{
bw.Write((byte[])value);
}
else
{
bool basic = ValueTypeUtils.IsBasicType(element);
for (int i = 0; i < size; i++)
{
object graph = value[i];
if (basic)
{
AdvancedObjectFormatter.AddValueToStream(element, graph, attr, bw);
}
else
{
AdvancedObjectFormatter.AddObjectToStream(graph, element, bw, attr);
}
}
}
}
return(true);
}
return(false);
}
/// <summary>
/// 添加值到流中
/// </summary>
private static bool AddValueToStream(Type clazz, object value, AdvancedObjectMarshalAsAttribute attr, BinaryWriter bw)
{
int size = ValueTypeUtils.SizeBy(clazz);
if (size > 0)
{
if (ValueTypeUtils.IsFloatType(clazz))
{
bw.Write(AdvancedObjectFormatter.As(ValueTypeUtils.BinaryBy(clazz, Convert.ToDouble(value)), attr));
}
else
{
if (ValueTypeUtils.IsDateTime(clazz))
{
value = Convert.ToDateTime(value).Ticks;
}
if (ValueTypeUtils.IsULong(clazz))
{
value = unchecked ((long)(ulong)value);
}
if (ValueTypeUtils.IsIPAddress(clazz))
{
value = BitConverter.ToInt32(((IPAddress)value).GetAddressBytes(), 0);
}
bw.Write(AdvancedObjectFormatter.As(ValueTypeUtils.BinaryBy(clazz, Convert.ToInt64(value), size), attr));
}
return(true);
}
else
{
if (AdvancedObjectFormatter.AddStringToStream(clazz, value as string, attr, bw))
{
return(true);
}
if (AdvancedObjectFormatter.AddListToStream(clazz, value as IList, attr, bw))
{
return(true);
}
if (AdvancedObjectFormatter.AddObjectToStream(value, clazz, bw, attr))
{
return(true);
}
}
return(false);
}
/// <summary>
/// 将 DataTable 转换成数据模型集合
/// </summary>
/// <typeparam name="T">数据模型类型</typeparam>
/// <param name="value">DataSet</param>
/// <returns></returns>
public static IList <T> ToList <T>(this DataTable value) where T : class
{
if (value == null)
{
throw new ArgumentNullException();
}
IList <KeyValuePair <PropertyInfo, int> > properties = new List <KeyValuePair <PropertyInfo, int> >();
foreach (PropertyInfo property in typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public))
{
foreach (DataColumn cols in value.Columns)
{
if ((cols.ColumnName).ToUpper() == (property.Name).ToUpper())
{
properties.Add(new KeyValuePair <PropertyInfo, int>(property, cols.Ordinal));
}
}
}
var ctor = typeof(T).GetConstructor(Type.EmptyTypes);
IList <T> buffer = new List <T>();
foreach (DataRow row in value.Rows)
{
T model = (T)ctor.Invoke(null);
try
{
buffer.Add(model);
}
finally
{
foreach (KeyValuePair <PropertyInfo, int> pair in properties)
{
object args = row[pair.Value];
if (args == DBNull.Value)
{
args = null;
}
Type prop = pair.Key.PropertyType;
if (args != null && !prop.IsInstanceOfType(args))
{
if (prop.IsEnum)
{
prop = prop.GetEnumUnderlyingType();
}
if (ValueTypeUtils.IsFloatType(prop))
{
args = ValueTypeFormatter.Parse(Convert.ToString(args), prop, NumberStyles.Number | NumberStyles.Float);
}
else
{
args = ValueTypeFormatter.Parse(Convert.ToString(args), prop);
}
}
if (pair.Key.SetMethod != null)
{
pair.Key.SetValue(model, args, null);
}
}
}
}
return(buffer);
}
