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Sep 20th, 2008

Open Images using combo box

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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..

asmit1987

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Sep 20th, 2008

Re: Open Images using combo box

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)
dim selectedItem as string
selectedItem = ComboBox.Text
dim selectedItem as string
selectedItem = ComboBox.Text

Last edited by manal; Sep 20th, 2008 at 9:41 pm.

manal

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Sep 20th, 2008

Re: Open Images using combo box

Quote ...

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.

Jx_Man

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Sep 21st, 2008

Re: Open Images using combo box

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

asmit1987

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Sep 21st, 2008

Re: Open Images using combo box

Do you store the file path in your combo box? Like this:

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

then you get the image with:

VB.NET Syntax (Toggle Plain Text)
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  '
  ' Load picture from the file
 
  Try
    PictureBox1.Image = Image.FromFile(ComboBox1.SelectedItem.ToString)
  Catch ex As Exception
    ' Handle exception
  End Try
 
End Sub
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  '
  ' Load picture from the file

  Try
    PictureBox1.Image = Image.FromFile(ComboBox1.SelectedItem.ToString)
  Catch ex As Exception
    ' Handle exception
  End Try

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)
Private ImagePaths() As String
 
ComboBox1.Items.Clear()
ComboBox1.Items.Add("My dog")
ComboBox1.Items.Add("My wife")
ReDim ImagePaths(1)
ImagePaths(0) = "D:\Download\Image1.jpg"
ImagePaths(1) = "D:\Download\Image2.jpg"
Private ImagePaths() As String

ComboBox1.Items.Clear()
ComboBox1.Items.Add("My dog")
ComboBox1.Items.Add("My wife")
ReDim ImagePaths(1)
ImagePaths(0) = "D:\Download\Image1.jpg"
ImagePaths(1) = "D:\Download\Image2.jpg"

and then you do the mapping to get the image:

VB.NET Syntax (Toggle Plain Text)
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  '
  ' Load picture from the file
 
  Try
    PictureBox1.Image = Image.FromFile(ImagePaths(ComboBox1.SelectedIndex))
  Catch ex As Exception
    ' Handle exception
  End Try
 
End Sub
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
  '
  ' Load picture from the file

  Try
    PictureBox1.Image = Image.FromFile(ImagePaths(ComboBox1.SelectedIndex))
  Catch ex As Exception
    ' Handle exception
  End Try

End Sub

Teme64

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