Visual Basic 2005 Image Viewer

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So i have filelistbox

when i click the picture("whatever the extension is") i need to view it in picturebox here is my codes:

VB.NET

Private Sub FileListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FileListBox1.SelectedIndexChanged

  Me.PictureBox2.ImageLocation = Application.StartupPath & "\" & FileListBox1.SelectedItem.ToString & "*.jpg; *.gif; *.png";

End Sub

the image wont appear...

Posted 26-Jul-11 19:30pm

thenorms12

Updated 26-Jul-11 20:07pm

Kim Togo

v3

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-07-26T19:39:00

Solution 1

This is because you cannot possibly have a file name ending with "*.jpg; *.gif; *.png". :-)

By the way, use string.Format instead of '&'. Multiple concatenation is bad because strings are immutable; each concatenation causes creation of a brand new string and copy operands into it.

[EDIT]
Something like

VB

Me.PictureBox2.ImageLocation = string.Format(
    "{0}{1}{2}",
    Application.StartupPath,
    System.IO.Path.DirectorySeparatorChar,
    FileListBox1.SelectedItem.ToString);

See http://msdn.microsoft.com/en-us/library/system.string.aspx[^].
[END EDIT]

—SA

Posted 26-Jul-11 19:39pm

Sergey Alexandrovich Kryukov

Updated 26-Jul-11 20:25pm

v6

Comments

thenorms12 27-Jul-11 1:43am

where will i put STRING.FORMAT? ill replace all &

thenorms12 27-Jul-11 1:44am

still wont appear, can u give me the codings?

thenorms12 27-Jul-11 1:44am

im new to vb.net

Sergey Alexandrovich Kryukov 27-Jul-11 2:15am

What coding? remove this string at the end; either append one single extension of include extension in the list box items.
String.Format? Look at the class string: http://msdn.microsoft.com/en-us/library/system.string.aspx.
--SA

Sergey Alexandrovich Kryukov 27-Jul-11 2:24am

Updated, see in [EDIT] brackets. If it makes sense for you, please accept the answer formally (green button).
If not (sigh...), your follow-up questions are welcome.
--SA

Kim Togo 27-Jul-11 2:08am

Good catch SA :-)

Sergey Alexandrovich Kryukov 27-Jul-11 2:21am

Thank you, Kim.
--SA