StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
4740651
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2011-01-19T20:55:21.773
FavoriteCount
0
LastActivityDate
2011-01-19T20:55:21.773
LastEditDate
LastEditorUserId
0
OwnerUserId
19403
ParentId
4731685
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
There are a lot of ways to answer your question. I think the most important of these ways is to emphasize that in WPF, if you're writing code that explicitly manipulates UI controls, you're probably doing something wrong. I can't emphasize this enough. To my mind the primary reason to use WPF at all is that it frees you from having to manipulate the UI in code. Here's how my programs determine whether or not a checkbox is checked: In XAML: <pre><code><CheckBox IsThreeState="false" IsChecked="{Binding IsChecked, Mode=TwoWay}"/> </code></pre> In the object bound to this view: <pre><code>public bool IsChecked { get; set; } </code></pre> The <code>IsChecked</code> property of my object now always reflects the state of the checkbox in the UI. (The reverse is not true unless I implement change notification in my class.) For your combo box example, I'd implement it like this. First, in XAML: <pre><code><ComboBox ItemsSource="{Binding Numbers}" SelectedItem="{Binding SelectedNumber, Mode=TwoWay}"/> </code></pre> In the object bound to the view: <pre><code>public IEnumerable<int> Numbers { get { return new[] { 1, 2, 3, 4, 5, 6 }; } } public int? SelectedNumber { get; set; } </code></pre> <code>SelectedNumber</code> is nullable in this case so that you can test for the case where nothing was selected, e.g.: <pre><code>Console.WriteLine(SelectedNumber == null ? "No number was selected." : SelectedNumber + " was selected.); </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POC# + WPF : how should I do proper checks/guards/casts when accessing control values?
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USRobert Rossney
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. COAnother good answer. I was beginning with ideas from older GUI libraries that I'd worked with and hadn't grasped the binding concept. Clearly, it's a fundamentally different way of doing things.
 singulars
 PostPostId
 PO
 UserUserId
 USRay

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.