CODEWITHSUNDEEP
c#xml
pghtech
pghtech

Reputation: 3702

XML: If a XmlNodeList.Count >= 1, will XmlNodeList.Item(#) ever be null?

I am trying to figure out if I have an XmlNodeList object, and Count is greater or equal to 1, will its "Item" object ever be null?

If so, how can I check if it is null before calling its "HasChildNode" property?

if (XmlNodeList.Item(0).HasChildNodes)

Thanks,

Upvotes: 1

Views: 3124

Answers (3)

Chung_TheWebDeveloper
Chung_TheWebDeveloper

Reputation: 41

It is not null even if there is no node inside the XmlNodeList! You may try "Count" method to check: 

XmlNodeList TheXmlNodeList = GetMenuItems();
if (TheXmlNodeList.Count > 0)
{
    //has node
}
else
{
    //do not have node
}

Upvotes: 1

phoog
phoog

Reputation: 43046

to answer the (contrafactual?) "if so" question:

if (XmlNodeList.Item(0) != null && XmlNodeList.Item(0).HasChildNodes)

Upvotes: 0

BrokenGlass
BrokenGlass

Reputation: 160922

No item will never be null in the example you give - usually you would access the items differently though - either by index directly (if you need the index):

XmlNodeList nodes= ...
for (int itr = 0; itr < nodes.Count; itr++)
{
   //do something with nodes[i]
}

or with foreach:

XmlNodeList nodes= ..
foreach (XmlNode node in nodes)
{
   //do something with node
}

Upvotes: 2

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