/// <summary>
/// 将控制器中的数据与指定对象中的数据进行比较，如果数据发生改变，返回true，否则返回false
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="value">需要进行比较的对象</param>
/// <returns></returns>
public bool CheckChanged <T>(T value)
{
foreach (var property in typeof(T).GetProperties().Where(p => p.CanRead))
{
foreach (var dataBindingItem in dataBindingItems.Where(item => string.Compare(item.DataMember, property.Name, true) == 0))
{
var controlValue = ControlValueReader.Read(dataBindingItem.Control, property.PropertyType);
var propertyValue = property.GetValue(value, null);
if (controlValue != null && !controlValue.Equals(propertyValue))
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// 从控件中获取指定对象的属性值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="value"></param>
public void GetValue <T>(T value)
{
foreach (var property in typeof(T).GetProperties().Where(p => p.CanWrite))
{
var dataBindingItem = dataBindingItems.FirstOrDefault(item => string.Compare(item.DataMember, property.Name, true) == 0);
if (dataBindingItem != null)
{
var returnType = property.PropertyType;
if (returnType.IsGenericType && returnType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
returnType = returnType.GetGenericArguments()[0]; //处理可空类型
}
var controlValue = ControlValueReader.Read(dataBindingItem.Control, returnType);
//将空字符串转换成null
if (this.ConvertEmptyStringToNull && controlValue != null && property.PropertyType == typeof(string) && controlValue.ToString() == string.Empty)
{
controlValue = null;
}
property.SetValue(value, controlValue, null);
}
}
}