public static T ReaderToModel<T>(IDataReader dr)
{
try
{
using (dr)
{
if (dr.Read())
{
Type modelType = typeof(T);
T model = Activator.CreateInstance<T>();
for (int i = 0; i < dr.FieldCount; i++)
{
PropertyInfo pi = modelType.GetProperty(GetPropertyName(dr.GetName(i)));
pi.SetValue(model, HackType(dr[i], pi.PropertyType), null);
}
return model;
}
}
return default(T);
}
catch (Exception ex)
{
throw ex;
}
} public static List<T> ReaderToList<T>(IDataReader dr)
{
using (dr)
{
List<T> list = new List<T>();
Type modelType = typeof(T);
while (dr.Read())
{
T model = Activator.CreateInstance<T>();
for (int i = 0; i < dr.FieldCount; i++)
{
PropertyInfo pi = modelType.GetProperty(GetPropertyName(dr.GetName(i)));
pi.SetValue(model, HackType(dr[i], pi.PropertyType), null);
}
list.Add(model);
}
return list;
}
}
//这个类对可空类型进行判断转换,要不然会报错
private static object HackType(object value, Type conversionType)
{
if (conversionType.IsGenericType && conversionType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
{
if (value == null)
return null; System.ComponentModel.NullableConverter nullableConverter = new System.ComponentModel.NullableConverter(conversionType);
conversionType = nullableConverter.UnderlyingType;
}
return Convert.ChangeType(value, conversionType);
} private static bool IsNullOrDBNull(object obj)
{
return ((obj is DBNull) || string.IsNullOrEmpty(obj.ToString())) ? true : false;
} //取得DB的列对应bean的属性名
private static string GetPropertyName(string column)
{
column = column.ToLower();
string[] narr = column.Split('_');
column ="";
for (int i = 0; i < narr.Length; i++)
{
if (narr[i].Length > 1)
{
column += narr[i].Substring(0, 1).ToUpper() + narr[i].Substring(1);
}
else
{
column += narr[i].Substring(0, 1).ToUpper();
}
}
return column;
}