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反射-获取嵌套对象的属性

getproperties propertyinfo reflection c#

2

callisto · 技术社区 · 17 年前

指: Reflection - setting Type of returned obj?

private T PopulateObject<T>(T dataObj, System.Data.DataRow dataRow)
{

    //Type type = dataObj.GetType();
    System.Reflection.PropertyInfo[] proplist = dataObj.GetType().GetProperties();

    foreach ( System.Reflection.PropertyInfo propertyitem in proplist)
    {
        if(propertyitem.Name != "")
        //s += propertyitem.Name + ":" + (propertyitem.GetValue(dataObj,null)).ToString() + "\r\n";
            try
            {
                propertyitem.SetValue(dataObj, dataRow[propertyitem.Name], null);
            }
            catch (Exception ex)
            {
                if (ex.Message.Contains("does not belong to table"))
                {
                   propertyitem.SetValue(dataObj, PopulateChildObject(propertyitem, dataRow), null);
                }
                else
                throw;
            } 
    }
    return dataObj;
}



private object PopulateChildObject(object dataObj, System.Data.DataRow dataRow)
{

    System.Reflection.PropertyInfo[] proplist = dataObj.GetType().GetProperties();

    foreach ( System.Reflection.PropertyInfo propertyitem in proplist)
    {
        if(propertyitem.Name != "")
            try
            {
                propertyitem.SetValue(dataObj, dataRow[propertyitem.Name], null);
            }
            catch (Exception ex)
            {           
             if (ex.Message.Contains("does not belong to table"))
                {
                   propertyitem.SetValue(dataObj, PopulateChildObject(propertyitem, dataRow), null);
                }
                else
                throw;
            } 
    }
    return dataObj;
}

2 回复 | 直到 9 年前

1

3

Marc Gravell 17 年前

propertyitem 是 PropertyInfo 从财产-即。

propertyItem.GetValue(dataObj, null);

如果此子对象是由父对象创建的,则不需要“设置”它;只需更新underyling对象:

PopulateChildObject(propertyitem.GetValue(dataObj, null), dataRow);

创建子对象(通常 Activator.CreateInstance )在这种情况下,你需要打电话 SetValue :

object child = propertyitem.GetValue(dataObj, null);
if(child == null) {
    child = Activator.CreateInstance(propertyitem.PropertyType);
    propertyitem.SetValue(dataObj, child, null);
}
PopulateChildObject(child, dataRow);

PopulateObject 和 PopulateChildObject 感觉它们可能是同一件事?

2

0

Mohamed.Abdo 12 年前

获取Nest属性,例如Developer。项目。名字

private static System.Reflection.PropertyInfo GetProperty(object t, string PropertName)
            {
                if (t.GetType().GetProperties().FirstOrDefault(p => p.Name == PropertName.Split('.')[0]) == null)
                    throw new ArgumentNullException(string.Format("Property {0}, is not exists in object {1}", PropertName, t.ToString()));
                if (PropertName.Split('.').Length == 1)
                    return t.GetType().GetProperty(PropertName);
                else
                    return GetProperty(t.GetType().GetProperty(PropertName.Split('.')[0]).GetValue(t, null), PropertName.Split('.')[1]);
            }