/// <summary>
/// 获取对象映射信息
/// </summary>
/// <param name="objType">对象类型</param>
/// <returns></returns>
public static ObjectMappingInfo GetObjectMapping(Type objType)
{
String cacheKey = mObjectMapCacheKey + objType.FullName;
try {
ObjectMappingInfo objMap = hashtable[cacheKey] as ObjectMappingInfo;
if (objMap == null)
{
objMap = new ObjectMappingInfo();
objMap.ObjectType = objType.FullName;
objMap.PrimaryKey = GetPrimaryKey(objType);
objMap.TableName = GetTableName(objType);
foreach (PropertyInfo objProperty in objType.GetProperties())
{
objMap.Properties.Add(
objProperty.Name.ToUpperInvariant(),
objProperty);
objMap.ColumnNames.Add(
objProperty.Name.ToUpperInvariant(),
GetColumnName(objProperty));
}
hashtable.Add(cacheKey, objMap);
}
return(objMap);
}
catch {
return(null);
}
}
/// <summary>
/// 创建对象实例
/// </summary>
/// <param name="objType">要创建的对象类型</param>
/// <param name="isInitialization">是否初始化对象实例</param>
/// <returns>返回创建的对象实例</returns>
public static Object CreateObject(Type objType, Boolean isInitialization = false)
{
try {
Object objObject = Activator.CreateInstance(objType);
if (isInitialization)
{
ObjectMappingInfo.InitializationObject(objObject);
}
return(objObject);
}
catch {
throw;
}
}
/// <summary>
/// 初始化对象各属性
/// </summary>
/// <param name="objObject">需初始化的对象</param>
/// <param name="objType">需初始化的对象的类型</param>
/// <returns>初始化后的对象</returns>
public static Object InitializationObject(Object objObject, Type objType)
{
ObjectMappingInfo objMapping = GetObjectMapping(objType);
if (objMapping == null)
{
return(null);
}
try {
foreach (PropertyInfo objPropertyInfo in objMapping.Properties.Values)
{
if (objPropertyInfo.CanWrite)
{
objPropertyInfo.SetValue(objObject, Null.GetNull(objPropertyInfo), null);
}
}
return(objObject);
}
catch {
return(null);
}
}
/// <summary>
/// 将IDataReader中数据填充到对象中
/// </summary>
/// <param name="objObject">要填充的对象</param>
/// <param name="dataReader">IDataReader</param>
private static void FillObjectFromReader(Object objObject, IDataReader dataReader)
{
PropertyInfo objPropertyInfo = null;
Type objPropertyType = null;
Object objDataValue;
Type objDataType;
Int32 intIndex;
ObjectMappingInfo objMappingInfo = ObjectMappingInfo.GetObjectMapping(objObject.GetType());
if (objMappingInfo == null)
{
objObject = null;
return;
}
try {
for (intIndex = 0; intIndex <= dataReader.FieldCount - 1; intIndex++)
{
if (objMappingInfo.Properties.TryGetValue(dataReader.GetName(intIndex).ToUpperInvariant(), out objPropertyInfo))
{
objPropertyType = objPropertyInfo.PropertyType;
if (objPropertyInfo.CanWrite)
{
objDataValue = dataReader.GetValue(intIndex);
objDataType = objDataValue.GetType();
if (objDataValue == null || objDataValue == DBNull.Value)
{
objPropertyInfo.SetValue(objObject, Null.GetNull(objPropertyInfo), null);
}
else if (objPropertyType.Equals(objDataType))
{
objPropertyInfo.SetValue(objObject, objDataValue, null);
}
else
{
if (objPropertyType == typeof(Char))
{
if (objDataValue.ToString().Length > 1)
{
objPropertyInfo.SetValue(objObject, objDataValue.ToString().ToCharArray()[0], null);
}
else
{
objPropertyInfo.SetValue(objObject, Null.NullChar, null);
}
}
else if (objPropertyType.BaseType.Equals(typeof(Enum)))
{
if (Regex.IsMatch(objDataValue.ToString(), "^\\d+$"))
{
objPropertyInfo.SetValue(objObject, Enum.ToObject(objPropertyType, Convert.ToInt32(objDataValue)), null);
}
else
{
objPropertyInfo.SetValue(objObject, Enum.ToObject(objPropertyType, objDataValue), null);
}
}
else if (objPropertyType == typeof(Guid))
{
objPropertyInfo.SetValue(objObject, Convert.ChangeType(new Guid(objDataValue.ToString()), objPropertyType), null);
}
else if (objPropertyType == typeof(Version))
{
objPropertyInfo.SetValue(objObject, new Version(objDataValue.ToString()), null);
}
else if (objPropertyType == objDataType)
{
objPropertyInfo.SetValue(objObject, objDataValue, null);
}
else
{
//等=1 为true 非1为false
if (objPropertyType == typeof(Boolean))
{
if (objDataValue.ToString() == "1")
{
objDataValue = true;
}
else
{
objDataValue = false;
}
}
if (((objDataValue is Int32) ||
(objDataValue is Single) ||
(objDataValue is Decimal)) &&
objPropertyType == typeof(String))
{
objDataValue = objDataValue.ToString();
}
objPropertyInfo.SetValue(objObject, Convert.ChangeType(objDataValue, objPropertyType), null);
}
}
}
}
}
}
catch {
throw;
}
}
