/// <summary> 尝试设置对象的属性/字段值,失败返回false
/// </summary>
/// <param name="instance">将要获取其属性/字段值的对象</param>
/// <param name="value">成功将值保存在value,失败返回null</param>
public bool TrySetValue(object instance, object value)
{
if (!CanWrite)
{
return(false);
}
if (instance == null)
{
if (Static == false)
{
return(false);
}
}
else if (ClassType.IsInstanceOfType(instance) == false)
{
return(false);
}
else if ((OriginalType.IsClass || Nullable) && (value == null || value is DBNull))
{
Setter(instance, null);
return(true);
}
try {
if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
Setter(instance, value);
return(true);
} catch {
return(false);
}
}
/// <summary> 设置对象的属性/字段值
/// </summary>
/// <param name="instance">将要获取其属性/字段值的实例对象</param>
/// <param name="value">将要设置的值</param>
/// <exception cref="ArgumentNullException">实例属性instance对象不能为null</exception>
public void SetValue(object instance, object value)
{
if (!CanWrite)
{
ErrorSetter(null, null);
}
else if (instance == null)
{
if (Static == false)
{
throw new ArgumentNullException("instance", "实例属性对象不能为null");
}
}
else if ((value == null || value is DBNull) && (OriginalType.IsClass || Nullable))
{
Setter(instance, null);
return;
}
if (MemberType.IsEnum)
{
var str = value as string;
if (str != null)
{
value = Enum.Parse(MemberType, str, true);
}
}
else if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
Setter(instance, value);
}
/// <summary> 尝试设置对象的属性/字段值,失败返回false
/// </summary>
/// <param name="instance">将要获取其属性/字段值的对象</param>
/// <param name="value">成功将值保存在value,失败返回null</param>
public bool TrySetValue(object instance, object value)
{
if (!CanWrite)
{
return(false);
}
else if (instance == null && Static == false)
{
return(false);
}
else if (ClassType.IsInstanceOfType(instance) == false)
{
return(false);
}
else if (MemberType.IsInstanceOfType(value) == false)
{
return(false);
}
try
{
Setter(instance, value);
return(true);
}
catch (Exception)
{
return(false);
}
}
/// <summary> 设置对象的属性/字段值
/// </summary>
/// <param name="instance">将要获取其属性/字段值的实例对象</param>
/// <param name="value">将要设置的值</param>
public void SetValue(object instance, object value)
{
if (!CanWrite)
{
ErrorSetter(null, null);
}
else if (instance == null && Static == false)
{
throw new Exception("实例对象不能为null");
}
if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
Setter(instance, value);
}
/// <summary> 尝试设置对象的属性/字段值,失败返回false
/// </summary>
/// <param name="instance">将要获取其属性/字段值的对象</param>
/// <param name="value">成功将值保存在value,失败返回null</param>
public bool TrySetValue(object instance, object value)
{
if (!CanWrite)
{
return(false);
}
if (instance == null)
{
if (Static == false)
{
return(false);
}
}
else if (ClassType.IsInstanceOfType(instance) == false)
{
return(false);
}
else if ((value == null || value is DBNull) && (OriginalType.IsClass || Nullable))
{
Setter(instance, null);
return(true);
}
try
{
if (MemberType.IsEnum)
{
var str = value as string;
if (str != null)
{
value = Enum.Parse(MemberType, str, true);
}
}
else if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
Setter(instance, value);
return(true);
}
catch (Exception ex)
{
var message = $"{MemberInfo.ReflectedType.ToString()}.{Name}属性取值失败";
Trace.WriteLine(ex, message);
return(false);
}
}
/// <summary> 设置对象的属性/字段值
/// </summary>
/// <param name="instance">将要获取其属性/字段值的实例对象</param>
/// <param name="value">将要设置的值</param>
/// <exception cref="ArgumentNullException">实例属性instance对象不能为null</exception>
public void SetValue(object instance, object value)
{
if (!CanWrite)
{
ErrorSetter(null, null);
}
else if (instance == null)
{
if (Static == false)
{
throw new ArgumentNullException("instance", "实例属性对象不能为null");
}
}
else if ((value == null || value is DBNull) && (OriginalType.IsClass || Nullable))
{
Setter(instance, null);
return;
}
if (MemberType.IsEnum)
{
var str = value as string;
if (str != null)
{
value = Enum.Parse(MemberType, str, true);
}
else
{
value = Enum.ToObject(MemberType, value);
}
}
else if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
try
{
Setter(instance, value);
}
catch (Exception ex)
{
var message = $"{MemberInfo.ReflectedType.ToString()}.{Name}赋值失败";
Trace.WriteLine(ex, message);
throw new TargetInvocationException(message + ",原因见内部异常", ex);
}
}
/// <summary> 设置对象的属性/字段值
/// </summary>
/// <param name="instance">将要获取其属性/字段值的实例对象</param>
/// <param name="value">将要设置的值</param>
/// <exception cref="ArgumentNullException">实例属性instance对象不能为null</exception>
public void SetValue(object instance, object value)
{
if (!CanRead)
{
ErrorSetter(null, null);
}
else if (instance == null)
{
if (Static == false)
{
throw new ArgumentNullException("instance", "实例属性对象不能为null");
}
}
else if ((OriginalType.IsClass || Nullable) && (value == null || value is DBNull))
{
Setter(instance, null);
return;
}
if (MemberType.IsInstanceOfType(value) == false)
{
value = Convert.ChangeType(value, MemberType);
}
Setter(instance, value);
}