public static T GetEntityListByDT <T>(DataRow row, Hashtable relation = null)
{
Type type = typeof(T);
T destObj = Activator.CreateInstance <T>();
PropertyInfo[] properties = type.GetProperties();
for (int i = 0; i < properties.Length; i++)
{
PropertyInfo prop = properties[i];
if (row.Table.Columns.Contains(prop.Name) && row[prop.Name] != DBNull.Value)
{
EntityConvert.SetPropertyValue(prop, destObj, row[prop.Name]);
}
}
if (relation != null)
{
foreach (string name in relation.Keys)
{
PropertyInfo temp = type.GetProperty(relation[name].ToString());
if (temp != null && row[name] != DBNull.Value)
{
EntityConvert.SetPropertyValue(temp, destObj, row[name]);
}
}
}
return(destObj);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="srcDT">要转换的表</param>
/// <param name="relation">此值可为空，如果实体属性与表字段不一致才设置（key表字段，value实体字段;）</param>
/// <returns></returns>
public static List <T> Dt2List <T>(this DataTable srcDT, Hashtable relation = null)
{
List <T> list = new List <T>();
T destObj = default(T);
if (srcDT != null && srcDT.Rows.Count > 0)
{
list = new List <T>();
foreach (DataRow row in srcDT.Rows)
{
destObj = EntityConvert.GetEntityListByDT <T>(row, relation);
list.Add(destObj);
}
}
return(list);
}
public static List <T> GetEntityListByDT <T>(DataRow[] rows, Hashtable relation)
{
List <T> list = null;
T destObj = default(T);
if (rows != null && rows.Length > 0)
{
list = new List <T>();
for (int i = 0; i < rows.Length; i++)
{
DataRow row = rows[i];
destObj = EntityConvert.GetEntityListByDT <T>(row, relation);
list.Add(destObj);
}
}
return(list);
}
private static object ChangeType(Type type, object value)
{
object result;
if (value == null && type.IsGenericType)
{
result = Activator.CreateInstance(type);
}
else
{
if (value == null)
{
result = null;
}
else
{
if (type == value.GetType())
{
result = value;
}
else
{
if (type.IsEnum)
{
if (value is string)
{
result = Enum.Parse(type, value as string);
}
else
{
result = Enum.ToObject(type, value);
}
}
else
{
if (type == typeof(bool) && typeof(int).IsInstanceOfType(value))
{
int temp = int.Parse(value.ToString());
result = (temp != 0);
}
else
{
if (!type.IsInterface && type.IsGenericType)
{
Type type2 = type.GetGenericArguments()[0];
object obj = EntityConvert.ChangeType(type2, value);
result = Activator.CreateInstance(type, new object[]
{
obj
});
}
else
{
if (value is string && type == typeof(Guid))
{
result = new Guid(value as string);
}
else
{
if (value is string && type == typeof(Version))
{
result = new Version(value as string);
}
else
{
if (!(value is IConvertible))
{
result = value;
}
else if (value is MySqlDateTime)
{
object temp;
temp = Convert.ChangeType(value.ToString(), System.TypeCode.DateTime);
result = Convert.ChangeType(temp, type);
}
else
{
result = Convert.ChangeType(value, type);
}
}
}
}
}
}
}
}
}
return(result);
}
private static void SetPropertyValue(PropertyInfo prop, object destObj, object value)
{
object temp = EntityConvert.ChangeType(prop.PropertyType, value);
prop.SetValue(destObj, temp, null);
}
