Anybody can tell me why it doesn't work ?

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C#

XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(@"C:\Users\aliu16\user.xml");
            // TODO: Module[3] is ok , Module[@ID='M003'] does not work  
            XmlNode nodeModule = xmlDoc.SelectSingleNode("//UserGroup[@ID='G001']/Module[@ID='M003']");

who can tell me why the object 'nodeModule' is null ,but Module[3] is ok . is my xpath wrong anywhere ? thanks .

xmldocument is below :

XML

<Powers>
  <UserGroup ID="G001" Name="admin" Desc="管理员权限" Users="U001,U002,U004">
    <Module ID="MOO1" Name="UserModule" Desc="账户模块" PageUrl="" />
    <Module ID="MOO2" Name="UserModule" Desc="账户模块" PageUrl="">
      <PowerItem ID="I001" Name="UserList" Desc="用户列表浏览权限" PageUrl="~/UserList.aspx" />
      <PowerItem ID="I001" Name="UserList" Desc="用户列表浏览权限" PageUrl="~/UserList.aspx" />
    </Module>
    <Module ID="MOO3" Name="UserModule3" Desc="账户模块" PageUrl="" />
    <Module ID="MOO4" Name="UserModule" Desc="账户模块" PageUrl="" />
    <Module ID="MOO5" Name="UserModule" Desc="账户模块" PageUrl="" />
  </UserGroup>
  <UserGroup ID="G002" Name="admin2" Desc="管理员权限2" Users="U001,U004" />
</Powers>

Posted 11-Dec-14 20:11pm

carono

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Comments

Praveen Kumar Upadhyay 12-Dec-14 2:20am

Module ID is MOO3 and not M003.

carono 12-Dec-14 2:30am

omg, my mistake . thanks a lot . it works now .

Praveen Kumar Upadhyay 12-Dec-14 2:44am

How will you close the question now?

carono 12-Dec-14 3:03am

yes , I will . but how to close it . I'm newer here . sorry .

carono 12-Dec-14 3:04am

to click the fork ?

BillWoodruff 12-Dec-14 2:43am

Wish I could vote you up for this, Praveen !

Praveen Kumar Upadhyay 12-Dec-14 2:46am

ha ha. My bad luck that I couldn't post this small answer.

Sergey Alexandrovich Kryukov 12-Dec-14 2:56am

Add one more line to the answer:
"It would be my bad luck that I couldn't post this small answer, if I didn't add this line to it."
I will post successfully and make the question formally answered.
Will you do that?
—SA

Praveen Kumar Upadhyay 12-Dec-14 3:02am

I didn't get your comment.

Sergey Alexandrovich Kryukov 12-Dec-14 3:08am

Could you read the line in my comments, the one in quotation marks ("")?
Put you short answer. It's to short to be accepted by the posting system.
So add the line I advised; so it will make more text to post. :-)
Good catch, by the way; I appreciate it.
—SA

Praveen Kumar Upadhyay 12-Dec-14 3:14am

So I am going to answer it.

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Praveen Kumar Upadhyay · Accepted Answer · 2014-12-11T21:23:00

Solution 1

It is very small answer. You are doing a mistake.
Module ID is MOO3 and not M003.

As I have answered, So want my points:)

Posted 11-Dec-14 21:23pm

Praveen Kumar Upadhyay

Comments

Praveen Kumar Upadhyay 12-Dec-14 3:23am

carono, you can now accept the solution and can vote if you want.

carono 12-Dec-14 3:40am

yes, i have accepted your solution and voted for it . thank you Praveen .

Marcin Kozub 12-Dec-14 3:33am

Good eye, +5 :)

Praveen Kumar Upadhyay 12-Dec-14 3:35am

Thank you Marcin

Praveen Kumar Upadhyay 12-Dec-14 3:40am

Thank you everybody for accepting the solution and upvoting.

Sergey Alexandrovich Kryukov 12-Dec-14 11:52am

As I say, a good catch; a 5.
—SA

Praveen Kumar Upadhyay 13-Dec-14 5:38am

Thank you so much guys. I got around 100 points with this answer.