/// <summary>
/// 根据名称设置指定属性或字段的值。
/// </summary>
/// <param name="instance">要设置属性或字段值的实例。</param>
/// <param name="name">属性或字段的名称。</param>
/// <param name="ignoreCase">指定是否忽略属性或字段名称的大小写。</param>
/// <param name="value">要设置的值。</param>
public void SetValue(object instance, string name, object value, bool ignoreCase = false)
{
if (value == null)
{
return;
}
var comparer = ignoreCase ? StringComparison.CurrentCultureIgnoreCase : StringComparison.CurrentCulture;
var m = datas.FirstOrDefault(mi => mi.Name.Equals(name, comparer));
if (m == null)
{
throw new MemberNotExistsException(name);
}
var setter = setters[m, TypeHelper.GetPropertyOrFieldSetter];
var desType = GetMemberType(m.Name);
var srcType = value.GetType();
if (!desType.IsAssignableFrom(srcType))
{
if (desType == typeof(string))
{
var toString = srcType.GetMethod("ToString", Type.EmptyTypes);
value = toString.Invoke(value, null);
}
else if (desType.IsEnumerable() && srcType.IsEnumerable())
{
var etype = TypeExtension.GetElementType(desType);
var cast = typeof(Enumerable).GetMethod("Cast", BindingFlags.Static | BindingFlags.Public).MakeGenericMethod(etype);
value = cast.Invoke(null, new[] { value });
if (desType.IsArray)
{
var toArray = typeof(Enumerable).GetMethod("ToArray", BindingFlags.Static | BindingFlags.Public).MakeGenericMethod(etype);
value = toArray.Invoke(null, new[] { value });
}
if (desType.IsGenericType && (desType.GetGenericTypeDefinition() == typeof(IList <>) || desType.GetGenericTypeDefinition() == typeof(List <>)))
{
var toList = typeof(Enumerable).GetMethod("ToList", BindingFlags.Static | BindingFlags.Public).MakeGenericMethod(etype);
value = toList.Invoke(null, new[] { value });
}
}
else if (srcType == typeof(string))
{
var strValue = value.ToString();
if (desType == typeof(Guid))
{
value = string.IsNullOrWhiteSpace(strValue) ? Guid.Empty : Guid.Parse(strValue);
}
else
{
var parse = desType.GetMethod("Parse", BindingFlags.Static | BindingFlags.Public, null, new[] { srcType }, null);
if (parse != null)
{
value = parse.Invoke(null, new[] { value });
}
else
{
throw new InvalidCastException(string.Format("无法将 \"{0}\" 类型的值转换为 \"{1}\" 类型。", srcType, desType));
}
}
}
}
setter(instance, value);
}