小编rea*_*aln的帖子

我的XML看起来像这样,文件名是 web.config

<?xml version="1.0"?>
<configuration>
  <appSettings>   
    <add key="configFile" value="IIS.config"/>
    <add key="RialtoDomain" value="ASNC_AUDITORS"/>    
  </appSettings>
  <system.serviceModel>
    ....
  </system.serviceModel>
</configuration>

在我读这样的代码中

String path = ConfigurationSettings.AppSettings["configFile"];

我得到一个空值.没有异常被抛出.这是正确的方法吗？

我有一个像这样的字符串: "<Root><Child>Hey</Child></Root>"

如何将其转换为XElement对象？

我不得不计算2到8635的功率.当我计算2 ^ 8635时,我遇到了这个错误.任何建议如何在python中解决这个问题.使用Decimal模块也没有帮助.

math.exp(2**8635)

Traceback (most recent call last):
  File "<pyshell#50>", line 1, in <module>
    long(math.exp(2**8635))
OverflowError: long int too large to convert to float

create or replace aArr is TABLE of varchar2 index by binary_integer;
create or replace bArr is TABLE of varchar2 index by binary_integer;

create or replace prc(oname aArr, iname bArr) as
begin

--Now i have two arrays
-- i want to insert or update into table using these two arrays
-- How can i do that with out using the loops.
-- is there any bulk insert or update.

end

现在我有两个数组.我想使用这两个数组插入或更新到表中.如何在不使用循环的情况下做到这一点？是否有批量插入或更新？

我想发送一个自定义对象system.servicemodel.Channels.Message.喜欢

public class person
{
    string Id;
    string Name;
}

MessageVersion mv = MessageVersion.Create(Soap12);
String action = "Msg";

Message msg = Message.Create(mv, action, new person());

serviceref.ProcessMsg(msg) // this is my service reference in client

//when i tried to access this in Service like 
person p = msg.GetBody<person>()
//I am getting an serialization exception
//I have the Person class on both client and service side

有人可以帮我弄清楚我的错误吗？

我正面临这个问题

class person
{
;
}

person p = new person();
XmlSerializer ser = new XmlSerializer(p.GetType());
FileStream fs = File.Open("sam.xml",FileMode.OpenOrCreate, FileAccess.Write);

ser.Serialize(fs,p)

fs.flush();
fs.close();

FileStream stream = FileStream("sam.xml", FileMode.Open);
XmlDictionaryReader xdr = XmlDictionaryReader.CreateTextReader(stream,new XmlDictionaryReaderQuotas());

现在我的问题是如何在不创建xml文件的情况下创建xdr对象.

我有一个像这样的数据迁移脚本.

Data_migration.sql

它的内容是

insert into table1 select * from old_schema.table1;
commit;
insert into table2 select * from old_schema.table2;
commit;

并且在执行脚本时table1有pk_productname约束

SQL> @ "data_migration.sql" 

我将获得一个唯一的约束(pk_productname)违规.但是当我执行单独的sql语句时,我不会得到任何错误.这背后有任何原因.以及如何解决这个问题.