tester une énumération en LINQ

Bonjour,

Je traite un fichier xml qui n'a hélas aucun xsd associé (format variable).
Lors de mon traitement je souhaite récupérer les données de certains noeuds dont les noeuds enfants contiennent, ou non, eux-mêmes des noeuds enfants.
Pour ce faire, je pensait utiliser la propriété HasElements mais ça m'oblige à traiter chaque sous-noeud par son nom au cas par cas. inélégant et surtout très hasardeux si le format du xml continue d'évoluer.

La méthode GetEnumerator() me semblait pas mal mais je n'arrive pas à l'exploiter. Mes noeuds enfants contiennent, lorsqu'ils doivent être exploités, une collection de noeuds enfant (les derniers de la hierarchie) appelés "error".

Mon test ne semble pas fonctionner, et lorsque je regarde le contenu des variables par un espion j'ai le résultat suivant :

Citation:

"L'énumération n'a généré aucun résultat"

mon code est le suivant :
Code:

1 2 3 4 5 XElement customchecksElement = oBaton.Root.Element("streamnode").Element("errors").Element("customchecks"); if (customchecksElement.Descendants().DescendantNodes().GetEnumerator() != null) { traitement...}
Quelqu'un peut-il me venir en aide ?
merci et bonne journée

Peux-tu poster des exemples de tes fichiers XML ?

Voila, en espérant que ca aide.
Pur l'exemple, les noeuds systemencodingchecks et MXFchecks pourraient également posséder des noeuds enfants error, mais ça n'est pas toujours le cas.

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<taskReport>
  <toplevelinfo Error="12" Filepath="h:\demostreams\baton\launch\Demo2_blocki-blurri-bright-loud\Launch_blocki-blurri-bright-loud.mxf" Format="MXF" Neighbours="2" Warning="0"/>
  <hierarchy value="(SYS)(SYS Level=-1- Name=-Source Package- ID=-1- IDName=-TrackID-/)(SYS Level=-2- Name=-MPEG2 Video- ID=-2- parent=-1-/)(SYS Level=-2- Name=-BWF Audio- ID=-3- parent=-1-/)(/SYS)"/>
  <streamnode Error="0" Warning="0" id="0" name="MXF" parent="0">
    <errors>
      <customchecks>
        <systemencodingchecks name="System Level"/>
        <MXFChecks name="MXF"/>
      </customchecks>
      <conformancechecks/>
    </errors>
    <info>
      <field name="Operational Pattern" value="OP1a"/>
      <field name="Modification Date" value="2009-03-16 13:50:45.652"/>
      <field name="Product Name" value="MXFWrap"/>
      <field name="Company Name" value="Snell &amp; Wilcox"/>
      <field name="Streamable File" value="Yes"/>
      <field name="RunIn" value="Not Present"/>
      <field name="Dark Metadata" value="Not Present"/>
      <field name="Footer Partition" value="Closed and Complete"/>
      <field name="Header Partition" value="Closed and Complete"/>
      <field name="TimeCode Track (Source Package ID 1)" value="Present"/>
      <field name="Start TimeCode (Source Package ID 1)" value="00:00:00:000 (00:00:00:00)"/>
      <field name="Duration (Source Package ID 1)" value="00:00:41:680 (00:00:41:17)"/>
      <field name="Drop Frame Flag (Source Package ID 1)" value="False"/>
      <field name="Active Format Descriptor" value="Info not found"/>
      <field name="Black Reference Level" value="16"/>
      <field name="Chroma Format" value="Info not found"/>
      <field name="Display Aspect Ratio Height" value="9"/>
      <field name="Display Aspect Ratio Width" value="16"/>
      <field name="Display Height" value="Info not found"/>
      <field name="Display Width" value="Info not found"/>
      <field name="Display WxH" value="Info not found"/>
      <field name="Frame Rate" value="25.00 fps"/>
      <field name="Stored Height" value="1080"/>
      <field name="Stored Width" value="1920"/>
      <field name="Stored WxH" value="1920x1080"/>
      <field name="Video Essence Type" value="Unknown"/>
      <field name="White Reference Level" value="235"/>
      <field name="TimeCode Track (Material Package)" value="Present"/>
      <field name="Start TimeCode (Material Package)" value="00:00:00:000 (00:00:00:00)"/>
      <field name="Duration (Material Package)" value="00:00:41:680 (00:00:41:17)"/>
      <field name="Drop Frame Flag (Material Package)" value="False"/>
      <field name="AudioTracks" value="1"/>
      <field name="Index Table" value="Present"/>
      <field name="Random Index Pack" value="Present"/>
      <field name="FileSize(Bytes)" value="81818684"/>
      <field name="Audio Video Duration Mismatch" value="00:00:00:000"/>
      <field name="KLV Fill Items" value="Present"/>
    </info>
  </streamnode>
  <streamnode Error="11" Warning="0" id="1" name="MPEG2 Video" parent="1">
    <errors>
      <customchecks>
        <genericvideochecks name="Video Description">
          <error description="The width x height of the video was found to be 1920x1080. &#xA;Restriction specified: 625 SD(720x576)." location="Picture[0]" severity="Serious" smptetimecode="00:00:00:00" synopsis="The resolution of the video does not match the restriction." timecode="00:00:00:000"/>
          <error description="The calculated width and height of display aspect ratio of the video was found to be 16:9. &#xA;Restriction specified: 4:3." severity="Serious" synopsis="The calculated display aspect ratio of the video does not match the restriction."/>
        </genericvideochecks>
        <decodedvideochecks name="Video Quality">
          <error description="Blurriness is persistent for 1 seconds, 200 milliseconds, starting at 00:00:04:880 and with average blurriness level as 72. &#xA;Restriction specified : Blurriness Duration  should be less than or equal to  500." location="Picture[135]" severity="Serious" smptetimecode="00:00:05:10" synopsis="Blurriness exceeds acceptable duration." timecode="00:00:05:400"/>
          <error description="Blockiness is persistent for 1 seconds, 280 milliseconds, starting at 00:00:12:960 and with average blockiness level as 46. &#xA;Restriction specified : Blockiness Duration  should be less than or equal to  500." location="Picture[337]" severity="Serious" smptetimecode="00:00:13:12" synopsis="Blockiness exceeds acceptable duration." timecode="00:00:13:480"/>
          <error description="Blockiness is persistent for 9 seconds, 440 milliseconds, starting at 00:00:18:720 and with average blockiness level as 52. &#xA;Restriction specified : Blockiness Duration  should be less than or equal to  500." location="Picture[481]" severity="Serious" smptetimecode="00:00:19:06" synopsis="Blockiness exceeds acceptable duration." timecode="00:00:19:240"/>
          <error description="Blockiness is persistent for 800 milliseconds, starting at 00:00:28:320 and with average blockiness level as 41. &#xA;Restriction specified : Blockiness Duration  should be less than or equal to  500." location="Picture[721]" severity="Serious" smptetimecode="00:00:28:21" synopsis="Blockiness exceeds acceptable duration." timecode="00:00:28:840"/>
          <error description="Blockiness is persistent for 4 seconds, 160 milliseconds, starting at 00:00:30:880 and with average blockiness level as 46. &#xA;Restriction specified : Blockiness Duration  should be less than or equal to  500." location="Picture[785]" severity="Serious" smptetimecode="00:00:31:10" synopsis="Blockiness exceeds acceptable duration." timecode="00:00:31:400"/>
          <error description="Blockiness is persistent for 6 seconds, 160 milliseconds, starting at 00:00:35:520 and with average blockiness level as 50. &#xA;Restriction specified : Blockiness Duration  should be less than or equal to  500." location="Picture[901]" severity="Serious" smptetimecode="00:00:36:01" synopsis="Blockiness exceeds acceptable duration." timecode="00:00:36:040"/>
          <error description="Blockiness was found in 62% of the stream: Restriction Specified: Maximum Percentage  should be less than or equal to  10." severity="Serious" synopsis="Percentage of the stream content with Blockiness exceeds the acceptable limit."/>
          <error description="Blurriness is persistent for 720 milliseconds, starting at 00:00:08:160 and with average blurriness level as 45. &#xA;Restriction specified : Blurriness Duration  should be less than or equal to  500." location="Picture[217]" severity="Serious" smptetimecode="00:00:08:17" synopsis="Blurriness exceeds acceptable duration." timecode="00:00:08:680"/>
        </decodedvideochecks>
        <MPEG2Videochecks name="MPEG2 Video">
          <error description="The MPEG Video Level was found to be High. &#xA;Restriction specified: Main." location="Picture[0]" severity="Serious" smptetimecode="00:00:00:00" synopsis="The MPEG Video Profile/Level does not match the restriction." timecode="00:00:00:000"/>
        </MPEG2Videochecks>
      </customchecks>
      <conformancechecks/>
    </errors>
    <info>
      <field name="Resolution" timecode="00:00:00:000" value="1920x1080"/>
      <field name="Luma Bits Per Pixel" timecode="00:00:00:000" value="8"/>
      <field name="Chroma Bits Per Pixel" timecode="00:00:00:000" value="8"/>
      <field name="Chroma Format" timecode="00:00:00:000" value="4:2:0"/>
      <field name="Frame Rate" timecode="00:00:00:000" value="25 fps"/>
      <field name="Pixel Aspect Ratio" timecode="00:00:00:000" value="1:1"/>
      <field name="Video Format" timecode="00:00:00:000" value="HD"/>
      <field name="Color Matrix" timecode="00:00:00:000" value="709"/>
      <field name="Profile" timecode="00:00:00:000" value="Main"/>
      <field name="Level" timecode="00:00:00:000" value="High"/>
      <field name="bit_rate_value" timecode="00:00:00:000" value="262143"/>
      <field name="bit_rate_extension" timecode="00:00:00:000" value="0"/>
      <field name="Encoded bitrate" timecode="00:00:00:000" value="104.86 Mbps"/>
      <field name="progressive_sequence" timecode="00:00:00:000" value="1"/>
      <field name="Picture Scanning Type" timecode="00:00:00:000" value="Progressive"/>
      <field name="top_field_first" timecode="00:00:00:000" value="0"/>
      <field name="GOP Status" timecode="00:00:00:000" value="Open"/>
      <field name="GOP Structure" timecode="00:00:00:480" value="(M=1 N=12), (M=1 N=3), (M=1 N=4), (M=1 N=11)"/>
      <field name="Duration" value="00:00:41:680"/>
      <field name="Average Bitrate" timecode="00:00:41:640" value="14.10 Mbps"/>
      <field name="Closed Caption 608 Data" value="Not Present"/>
      <field name="Closed Caption 708 Data" value="Not Present"/>
      <field name="Picture Coding Type" timecode="00:00:41:640" value="I and P"/>
      <field name="picture_structure" timecode="00:00:41:640" value="Frame"/>
      <field name="Divicom 608" value="Not Present"/>
      <field name="SCTE-20 608" value="Not Present"/>
      <field name="Brightness Range" value=" -32-  43"/>
      <field name="Cadence Pattern (Encoded)" value="2-2"/>
      <field name="Display Aspect Ratio" value="16:9"/>
      <field name="Active Pixels" value="1920x1080 (100.00%)"/>
      <field name="Active Format" value="Info not found."/>
      <field name="Scan Order" value="Info not found."/>
      <field name="Line 23 WSS PAL" value="Info not found."/>
      <field name="VITC PAL" value="Info not found."/>
      <field name="Subtitles in Teletext PAL" value="Info not found."/>
    </info>
  </streamnode>
  <streamnode Error="1" Warning="0" id="2" name="BWF Audio" parent="1">
    <errors>
      <customchecks>
        <genericaudiochecks name="Audio Description"/>
        <decodedaudiochecks name="Audio Quality">
          <error description="Audio Loudness Level of channel(0) exceeds the limit for 1258 msec starting from time : 00:00:17:962. Maximum loudness level : -11.52 LKFS, Restricion specified : Level(LKFS)  should be less than or equal to  -17 LKFS" location="Frame[842]" severity="Serious" synopsis="Audio Loudness found in the audio stream." timecode="00:00:17:962"/>
        </decodedaudiochecks>
        <bwfaudiochecks name="BWF Audio"/>
      </customchecks>
      <conformancechecks/>
    </errors>
    <info>
      <field name="Sampling Frequency" timecode="00:00:00:000" unit="Hz" value="48000"/>
      <field name="Audio Channels" timecode="00:00:00:000" value="2"/>
      <field name="Bits per sample" timecode="00:00:00:000" value="16"/>
      <field name="LFE Channels" timecode="00:00:00:000" value="0"/>
      <field name="Bit Rate" timecode="00:00:00:000" unit="kbps" value="1536"/>
      <field name="Duration" value="00:00:41:680"/>
      <field name="Creation Time" value="Info not found."/>
      <field name="Start Time Code" value="Info not found."/>
      <field name="UMID" value="Info not found."/>
      <field name="Average Loudness for Channel(0)" unit="LKFS" value="-27.151"/>
      <field name="Maximum Loudness for Channel(0)" unit="LKFS" value="-11.516"/>
    </info>
  </streamnode>
</taskReport>