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POPictureBox always throws NullReferenceException
primarykey
Id
11395799
data
AcceptedAnswerId
11395997
AnswerCount
3
ClosedDate
CommentCount
6
CommunityOwnedDate
CreationDate
2012-07-09T13:14:21.080
FavoriteCount
0
LastActivityDate
2012-07-09T13:35:17.403
LastEditDate
2012-07-09T13:23:03.200
LastEditorUserId
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OwnerUserId
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PostTypeId
1
Score
1
ViewCount
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LastEditorDisplayName
text
Body
A simple code that should show an image using PictureBox doesn't work (frm is my form): <pre><code>PictureBox pb = new PictureBox(); pb.Image = new Bitmap("1.jpg"); pb.SizeMode = PictureBoxSizeMode.Zoom; frm.Controls.Add(pb); </code></pre> When event with this code happens I have NullReferenceExcpetion The error occurs at <code>frm.Controls.Add(pb)</code> The exception is: <blockquote> System.NullReferenceException: Object reference not set to an instance of an object. at Form1.HotKeyManager_HotKeyPressed(Object sender, HotKeyEventArgs e) in C:\Users\Алексей\Documents\Visual Studio 2010\Projects\NotepadCSharpSetup\WinFormsAgain\RealTrayForm\Test.cs:line 52 </blockquote> Full code : <pre><code>static void HotKeyManager_HotKeyPressed(object sender, HotKeyEventArgs e) { Size ScreenSize = Screen.PrimaryScreen.Bounds.Size; Bitmap image = new Bitmap(ScreenSize.Width, ScreenSize.Height); using (Graphics g = Graphics.FromImage(image)) { g.CopyFromScreen(Point.Empty, Point.Empty, ScreenSize); } Bitmap preview = new Bitmap(image.Width / 10, image.Height / 10); using (Graphics gr = Graphics.FromImage(preview)) { gr.SmoothingMode = SmoothingMode.AntiAlias; gr.InterpolationMode = InterpolationMode.HighQualityBicubic; gr.PixelOffsetMode = PixelOffsetMode.HighQuality; gr.DrawImage(image, new Rectangle(0, 0, image.Width / 10, image.Height / 10)); } preview.Save("1.jpg"); Form frm = (Form)sender; PictureBox pb = new PictureBox(); pb.Image = new Bitmap("1.jpg"); pb.SizeMode = PictureBoxSizeMode.Zoom; frm.Controls.Add(pb); } </code></pre>
Tags
<c#><winforms><picturebox>
Title
PictureBox always throws NullReferenceException
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USDavid Hall
UserOwnerUserId
1. USlenden
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. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POPictureBox always throws NullReferenceException
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

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