我有办法将所有值从表保存到txt文件:
UserDataDBsDataContext dataContext = new UserDataDBsDataContext();
List<UserData> usersL = (from u in dataContext.UserDatas
select u).ToList();
var properties = typeof(UserData).GetProperties();
var userValues = new List<string>();
foreach (var user in usersL)
{
var values = new List<object>();
foreach (var property in properties)
{
object value = property.GetValue(user, null);
values.Add(value);
}
userValues.Add(string.Join(",", values));
}
File.WriteAllLines("my_data.txt", userValues);
现在我有两个查询,我想做完全相同的事情,所以我尝试创建单独的方法来负责循环表值。
循环方式:
public void loopProp(PropertyInfo[] properites, List<string> addedValues)
{
foreach (var qrl in ...........)
{
var values = new List<object>();
foreach (var property in properites)
{
object value = property.GetValue(qrl, null);
values.Add(value);
}
addedValues.Add(string.Join(",", values));
}
File.WriteAllLines("my_passed_data.txt", addedValues);
}
但我不知道,如何传递查询结果(ar或ud(:
我的代码:
List<AutoRef> ar = (from a in rjdc.AutoRefs
select a).ToList();
List<UserDataRef> ud = (from u in rjdc.UserDataRefs
select u).ToList();
var propertiesAutoRef = typeof(AutoRef).GetProperties();
var autoValues = new List<string>();
var propertiesUserRef = typeof(UserDataRef).GetProperties();
var userValues = new List<string>();
//loopProp(propertiesAutoRef, autoValues);
//loopProp(propertiesUserRef, userValues);
回答您的具体问题。您应该使该方法泛型并将源代码传递为IEnumerable<T>
:
public void loopProp<T>(IEnumerable<T> source, PropertyInfo[] properites, List<string> addedValues)
{
foreach (var qrl in source)
{
// ...
}
File.WriteAllLines("my_passed_data.txt", addedValues);
}
用法:
loopProp(ar, propertiesAutoRef, autoValues);
loopProp(ud, propertiesUserRef, userValues);
可能您还应该传递文件路径参数,而不是在方法中对其进行硬编码。