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Open Images using combo box

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Open Images using combo box

 
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  #1
Sep 20th, 2008
I am having a combo box in my form and i want to open a image using that now whenever i select any option from the combo box different different images should be displayed what cud be the necessary code and what event should be used to write the necessary code for it plz guide with all necessary deatils along with a example code..
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Re: Open Images using combo box

 
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  #2
Sep 20th, 2008
1/to use image in the form you need PictureBox Control
2/in order to change the picture whenever the user select item from the comboBox you use the SelectedIndexChanged event, you can get the item that user selected by
VB.NET Syntax (Toggle Plain Text) 
  1. dim selectedItem as string
  2. selectedItem = ComboBox.Text
Last edited by manal; Sep 20th, 2008 at 9:41 pm.
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Re: Open Images using combo box

 
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  #3
Sep 20th, 2008
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dim selectedItem as string
selectedItem = ComboBox.Text
why didn't use selectedItem = ComboBox.SelectedItem ?
and there are path on combobox item to loaded?
Last edited by Jx_Man; Sep 20th, 2008 at 11:50 pm.
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Re: Open Images using combo box

 
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  #4
Sep 21st, 2008
i am opening the image frm the combo box the image is placed in a picture box now if my first item in the list be x then what code should be written to open the image in the picture box
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Re: Open Images using combo box

 
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  #5
Sep 21st, 2008
Do you store the file path in your combo box? Like this:

VB.NET Syntax (Toggle Plain Text) 
  1. ComboBox1.Items.Clear()
  2. ComboBox1.Items.Add("D:\Download\Image1.jpg")
  3. ComboBox1.Items.Add("D:\Download\Image2.jpg")

then you get the image with:

VB.NET Syntax (Toggle Plain Text) 
  1. Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  2.   '
  3.   ' Load picture from the file
  4.  
  5.   Try
  6.     PictureBox1.Image = Image.FromFile(ComboBox1.SelectedItem.ToString)
  7.   Catch ex As Exception
  8.     ' Handle exception
  9.   End Try
  10.  
  11. End Sub

ComboBox1.SelectedItem is of the type object so you have to cast it to the string.
However, if you store "friendly names" in your combo box, you need some mapping to file names. Here's a one way to do that:

VB.NET Syntax (Toggle Plain Text) 
  1. Private ImagePaths() As String
  2.  
  3. ComboBox1.Items.Clear()
  4. ComboBox1.Items.Add("My dog")
  5. ComboBox1.Items.Add("My wife")
  6. ReDim ImagePaths(1)
  7. ImagePaths(0) = "D:\Download\Image1.jpg"
  8. ImagePaths(1) = "D:\Download\Image2.jpg"

and then you do the mapping to get the image:

VB.NET Syntax (Toggle Plain Text) 
  1. Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  2.   '
  3.   ' Load picture from the file
  4.  
  5.   Try
  6.     PictureBox1.Image = Image.FromFile(ImagePaths(ComboBox1.SelectedIndex))
  7.   Catch ex As Exception
  8.     ' Handle exception
  9.   End Try
  10.  
  11. End Sub
Teme64 @ Windows Developer Blog
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