I ma new Learner. I am creating an application in Visual Basic and I need help to load dynamically data from database into my tabpages.
I want TabPages names to be "Category Names" (From Tbl_Category) and in each Tabpages i want buttons to be created and these buttons are each record from "Tbl_ItemDetails.
button name will be from "ItemSKU" column. and button image will be from "Item_Image" column.
i have searched a lot but couldn't do it. Please help me on this.
if you guys know any other way of doing it (without tabpages) please share. Thanks!
here are some codes which i tried.
1. image code is not working.
2. if i have more items on tabpages it does not show any scroll bar. so i can see only few button not all.
![enter image description here][1]
Private Sub AddProductsToTabbedPanel()
Dim i As Integer = 1
For Each tp As TabPage In TabControl1.TabPages
Dim filteredProduct As ObjectQuery(Of Tbl_ItemDetails) = New ObjectQuery(Of Tbl_ItemDetails)(("SELECT VALUE P FROM Tbl_ItemDetails AS P WHERE P.CatID = " + i.ToString), cse)
Dim flp As FlowLayoutPanel = New FlowLayoutPanel
flp.Dock = DockStyle.Fill
For Each tprod As Tbl_ItemDetails In filteredProduct
Dim b As Button = New Button
b.Size = New Size(100, 100)
b.Text = tprod.ItemSKU
' ''how can i get image on button. bellow code is not working
'b.BackgroundImage = tprod.Item_Image
'b.Image = tprod.Item_Image
b.Tag = tprod
AddHandler b.Click, AddressOf Me.UpdateProductList
flp.Controls.Add(b)
Next
tp.Controls.Add(flp)
i = (i + 1)
Next
End Sub
1: How the Image will work
a) If you only provide a pathname to an existing file
button.Image = New Bitmap("C:\temp\Info.bmp")
b) If you get a bytearray from your DB containing the bitmap
Dim byteArrayFromDB As Byte()
Dim memStream As System.IO.MemoryStream
Dim img As Image
memStream = New System.IO.MemoryStream(byteArrayFromDB)
img = Image.FromStream(memStream)
2: Scrollable FlowLayoutPanel
flp.AutoScroll = True
Related
I'm doing a deck builder project through a card database and so far when I click a row (using datagridview), the value contained in the "image_url" column is printed into an invisible textbox, which is then used to download that image and show it in a picturebox.
Now that all works fine, but decks go up to 60 cards so I'm going to use 60 pictureboxes to print the user's selected cards. What I'm been trying to do is set up like a picturecount and when they select a column the number is increased by one like this:
picturebox(picturecount) = textbox4.text
but I've run into too many errors. Would you know a way to display the user's selected card in the next available picturebox? For example if they select "Dark Magician" three times, then the image of the "Dark Magician" is printed in the first available three pictureboxes
VB.NET:
Private Async Sub PictureLoader()
Dim imageURL As String
If TextBox4.Text = "" Then
imageURL = dataSet.Tables("YGO cards").Rows(row_count).Item(7)
Else
imageURL = TextBox4.Text
End If
Dim client As Net.WebClient = New Net.WebClient()
Dim ms As MemoryStream = New MemoryStream(Await client.DownloadDataTaskAsync(New Uri(imageURL)))
Using image As Image = Image.FromStream(ms)
PictureBox1.Image?.Dispose()
PictureBox1.Image = DirectCast(image.Clone(), Image)
End Using
ms.Dispose()
client.Dispose()
End Sub
and this is the event when a column is selected in the datagrid!
Dim index As Integer
index = e.RowIndex
Dim selectedrow As DataGridViewRow
selectedrow = DataGridView1.Rows(index)
' selectedrow.Cells(1) is the image_Url column
TextBox4.Text = selectedrow.Cells(1).Value.ToString()
If TextBox4.Text = "" Then
PictureBox1.Image = Nothing
' imageURL = dataSet.Tables("YGO cards").Rows(row_count).Item(7)
Else
PictureLoader()
End If
Ignore for a moment the specifics of your particular problem and break this down into a generic statement. What you're saying is that you have a collection and that the size of the collection can grow or shrink based on user input. This is an ideal case for a List(Of T) where you declare the List by specifying the data type of the items it will hold and then add items as needed. Because you are storing the URL of the card, you would create a new List(Of String):
Dim cards As List(Of String) = New List(Of String)
Now whenever you needed to add URLs to your list you would call the Add method if it is a single URL or AddRange if it is multiple URLs:
cards.Add(TextBox1.Text)
'Or
cards.AddRange({TextBox1.Text, TextBox2.Text, TextBox3.Text})
As far as displaying the image in the PictureBox, there's really no need to create a MemoryStream and clone an Image considering that the PictureBox class has the Load and LoadAsync (which it looks like you want asynchronous capabilities) methods. But if you wanted to create a PictureBox for every item in your collection, you will need to iterate through the collection, create a new PictureBox, call the Load or Load Async method on the currently iterated URL, and then add it to the Form (or a container in general). This can be done using a traditional For/Each loop:
'Create a placeholder variable
Dim cardPictureBox As PictureBox
'Loop through every selected card URL
For Each url As String In Cards
'Create a new PictureBox
cardPictureBox = New PictureBox() With {
.Size = New Size(100, 100)
.SizeMode = PictureBoxSizeMode.CenterImage
.WaitOnLoad = False
}
'Add the PictureBox to the Form
Me.Controls.Add(cardPictureBox)
'Load the image asynchronously
cardPictureBox.LoadAsync(url)
Next
I imagine this is probably an easy to answer question but for some reason I can't get it to work
Sub New(ByVal Sess As AudioSessionControl2)
S_Session = Sess
'Create the panel and position it.
S_Panel.BackColor = Color.AliceBlue
S_Panel.Width = 200
S_Panel.Height = 40
Dim Position As New Point(6, 19)
If G_AppSessions.Count > 0 Then
Position = Point.Add(G_AppSessions.Item(G_AppSessions.Count - 1).SessionPanel.Location, New Point(0, 45))
End If
S_Panel.Location = Position
'Create a label which has the name of the process
Dim S_PName As New Label
S_PName.Text = "Test"
S_PName.Dock = DockStyle.Left
S_Panel.Controls.Add(S_PName)
'Create a button to change volume
Dim S_Save As New Button()
S_Save.Text = "Save"
AddHandler S_Save.Click, AddressOf Save_Click
S_Save.Parent = S_Panel
S_Panel.Controls.Add(S_Save)
S_Volume.Parent = S_Panel
S_PName.Parent = S_Panel
MainForm.Controls.Add(S_Panel)
S_Panel.Parent = MainForm.gb_Applications
End Sub
The problem is that, the label will show because its docked, but the button won't. It will only show if its docked as well, and thats just not what I want. This is part of a class for creating a dynamic UI, where I can create a number of this class to create a bunch of panels for various things.
I don't see anywhere where you are setting the label or button position. You probably have them both at 0,0 and the label is on top of the button, obscuring it. Did you try setting the position of both the controls, making sure they don't overlap?
i am trying to make a new tab and my new tabs always have a space between them
im new to this site so i cant post pictures so heres a link to my issue http://i43.tinypic.com/rbbndk.png
heres my new tab code
Private Sub NewPageToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles NewPageToolStripMenuItem.Click
Dim newpage As TabItem = TabControl1.CreateTab("newpage")
Dim textb As New RichTextBox
Dim filename As New TextBox
Dim sw As New StreamWriter(siteloc & filename.Text & ".hsp")
Dim createb As New Button
'Set the contents of the page
textb.ReadOnly = False
textb.Multiline = True
textb.Dock() = DockStyle.Top
textb.Height = 338
newpage.Text = "NewPage"
filename.Text = "Untitled"
filename.Location = New Point(5, 342)
filename.Width = 220
createb.Location = New Point(232, 342)
createb.Text = "Submit page"
'Add the tab to the page
newpage.AttachedControl.Controls.Add(filename)
newpage.AttachedControl.Controls.Add(textb)
newpage.AttachedControl.Controls.Add(createb)
TabControl1.Tabs.Add(newpage)
'select the tab
TabControl1.SelectedTab = newpage
'add button handlers
AddHandler createb.Click, AddressOf createb_Click
End Sub
i looked all over for answers and found nothing. i havent changed anything in the propertys and i just installed dotnetbar.
CreateTab method already adds the newly created tab to Tabs collection (see docs for the method) so you are adding it twice. Remove this code: TabControl1.Tabs.Add(newpage)
Hope this helps.
I have a child form that is completely created in code.
I would like to add tool tips to the textbox controls on the form. I know how to set up the tool tips on the fly but can't find a way to add the tooltip control to the form on the fly. All the hits I find on google refer to dragging the control from the designers toolbox.
I would need to do something like:
' Add tool tip control
Dim toolTip1 As New ToolTip()
toolTip1.ShowAlways = True
frm.Controls.Add(toolTip1)
This does not work
I tried adding a sub to handle the from.load event(with a handler that poitn to the sub) at design time but can not get passed the error "Tooltip1 is not declared" when adding the tooltip to the iundividual dynamic controls.
If I call this dynamic form from a parent form and add the tooltip control to the parent form I can use it for the child form. But how would I do this if I was creating the form from a routine that does not live on a parent form?
thanks
Dim frm As New Form
' Add tool tip control
''Dim toolTip1 As New ToolTip()
''toolTip1.ShowAlways = True
'Draw the Form object
'close the dynamic frm if existing already
If frm IsNot Nothing Then
frm.Close()
End If
frm = New Form()
frm.AutoScaleDimensions = New System.Drawing.SizeF(6.0F, 13.0F)
frm.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
frm.Name = "frm_test"
'dimension is irrelevant at the moment
frm.ClientSize = New System.Drawing.Size(10, 10)
'the parent will be the current form
'frm.MdiParent = this;
'splash screen mode form, why not...
frm.ControlBox = True
frm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
frm.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink
frm.BackColor = System.Drawing.Color.LightGray
For Each item As MYFILE.Class in the Collection
Dim aTextBox As New TextBox()
aTextBox.Font = New System.Drawing.Font(sFont, Single.Parse(sSizeFont), System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CByte(0))
aTextBox.BackColor = System.Drawing.Color.Yellow
aTextBox.Location = New System.Drawing.Point(iNewColumnPosition + 5 + intMaxWidthLabel, intVertPos)
aTextBox.Size = New System.Drawing.Size(intWidthTextBox + 10, intGapHeight)
'store the biggest width, so that the textboxes can be vertically aligned
If intWidthTextBox > intMaxWidthText Then
intMaxWidthText = intWidthTextBox
End If
'giving a name to all your object will be the only way
'to retrieve them and use them
'for the purpose of this sample, the name can be the
'same for all textboxes.
aTextBox.Name = item.ParameterName
'giving the maximun size in caracters for the textbox.
aTextBox.MaxLength = Integer.Parse(item.ParameterLength)
toolTip1.SetToolTip(aTextBox, "TIP" & intIndex.ToString)
'tab have to be ordered
aTextBox.TabIndex = intIndex
intIndex += 1
'Vertical position is to be manage according the
'tallest object in the form, in this case the
'textbox it self
intVertPos += intGapHeight
'adding the textbox to the form
frm.SuspendLayout()
aTextBox.SuspendLayout()
frm.Controls.Add(aTextBox)
Next
I left a lot of code out but this should give you an idea as to what I am doing
In vb it is
Dim tooltip As New ToolTip(components)
tooltip.SetToolTip(textBox1, "This is a textbox tooltip")
Sorry this is not in VB.NET but I am pretty sure you can easily convert this. The first line is to set ToolTip control to your form components. The second is how you set a tooltip to a control and give it the related text.
ToolTip tooltip = new ToolTip(components);
tooltip.SetToolTip(textBox1, "This is a textbox tooltip");
I try to load images from ImageList to ListView and it works great... but when the form is load, the last image of ImageList doesn't appear.... I will call this procedure at the combobox selectedIndexChanged event and at the form load... when the form load, the last image from ImageList doesn't appear and when I click the combobox for several times, all of the images appear as intended... Any help?
Here is the code..
Private Sub LoadMenuItem()
lvItem.Clear()
Dim adptItem As New Restaurant_Management_SystemDataSetTableAdapters.ItemTableAdapter
Dim categoryID As Integer = cboccategory.SelectedValue
Dim dtItem As Restaurant_Management_SystemDataSet.ItemDataTable = adptItem.GetDataByCategoryID(categoryID)
lvItem.BeginUpdate()
For Each drItem As Restaurant_Management_SystemDataSet.ItemRow In dtItem.Rows
Dim ms As System.IO.MemoryStream = New System.IO.MemoryStream(drItem.ImageForItem)
Dim img As Image = System.Drawing.Image.FromStream(ms)
ImageList1.Images.Add(drItem.ItemID, img)
lvItem.Items.Add(drItem.ItemName.Trim, drItem.ItemID)
Next
lvItem.EndUpdate()
cboItem.ValueMember = "ItemID"
cboItem.DisplayMember = "ItemName"
cboItem.DataSource = dtItem
lvItem.Refresh
End Sub