StackOverflow2013

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plurals

PO
primarykey
Id
13805712
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-12-10T17:11:27.773
FavoriteCount
0
LastActivityDate
2012-12-10T17:22:54.837
LastEditDate
2012-12-10T17:22:54.837
LastEditorUserId
375375
OwnerUserId
375375
ParentId
13805617
PostTypeId
2
Score
11
ViewCount
0
LastEditorDisplayName
text
Body
The first type of cast is called an "explicit cast" and the second cast is actually a conversion using the <code>as</code> operator, which is slightly different than a cast. The explicit cast <code>(type)objectInstance</code> will throw an <code>InvalidCastException</code> if the object is not of the specified type. <pre><code>// throws an exception if myObject is not of type MyTypeObject. MyTypedObject mto = (MyTypedObject)myObject; </code></pre> The <code>as</code> operator will not throw an exception if the object is not of the specified type. It will simply return <code>null</code>. If the object is of the specified type then the <code>as</code> operator will return a reference to the converted type. The typical pattern for using the <code>as</code> operator is: <pre><code>// no exception thrown if myObject is not MyTypedObject MyTypedObject mto = myObject as MyTypedObject; if (mto != null) { // myObject was of type MyTypedObject, mto is a reference to the converted myObject } else { // myObject was of not type MyTypedObject, mto is null } </code></pre> Take a look at the following MSDN references for more details about explicit casting and type conversion: <ul> <li><a href="http://msdn.microsoft.com/en-us/library/ms173105.aspx" rel="noreferrer">Casting (C#)</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/ms173105.aspx" rel="noreferrer">Casting and Type Conversions</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/cc488006.aspx" rel="noreferrer">How to: Safely Cast by Using as and is Operators</a></li> </ul>
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1. This table or related slice is empty.
PostParentId
1. PODifference between type cast and 'as' cast
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 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USIan R. O'Brien
UserOwnerUserId
1. USIan R. O'Brien
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PostLinksPostIdRelatedPostId
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PostLinksRelatedPostIdPostId
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PostsAcceptedAnswerId
1. PODifference between type cast and 'as' cast
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 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
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 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
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 VTUpMod
3. VO
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 This table or related slice is empty.
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CommentsPostId
1. This table or related slice is empty.

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