I have a form with a tabcontrol, the tabscontrol starts with a single tab and more are added dynamically if need be. Each tab holds around 20 seperate panels which are used to represent pages. It can handle 12 tabs fine and continue adding more way past 40. However, whenever you click on a tab to load it up it throws this error.
System.ComponentModel.Win32Exception.
With no location in the code to wear it crashed.
I've tried this on multiple machines and the same thing happens.
This is the code to adding a new tab.
Public Sub CreateAnotherPage5(NoOfPage5 As Integer)
For i = 1 To NoOfPage5
Dim PG5E As New ConditionReportPage5
Dim PREV As ConditionReportPage5
If NoOfPages Mod 20 = 0 Then
Dim NwTabPG As New TabPage
Dim NwPanel As New PanelAutoScroll
NoOfTabs = NoOfTabs + 1
NwTabPG.Name = "tpg_" & NoOfTabs
NwPanel.Name = "pnl_" & NoOfTabs
NwTabPG.Text = NoOfTabs
NwPanel.Dock = DockStyle.Fill
NwPanel.AutoScroll = True
frm_Main.tbc_Main.TabPages.Add(NwTabPG)
NwTabPG.Controls.Add(NwPanel)
PG5E.Location = New Point(frm_Main.FirstPageX, frm_Main.FirstPageY)
NwPanel.Controls.Add(PG5E)
NoOfPages = 1
Else
Dim PrevPanl As PanelAutoScroll
Dim PrevTabPG As TabPage
PrevTabPG = frm_Main.tbc_Main.Controls.Item("tpg_" & NoOfTabs)
PrevPanl = PrevTabPG.Controls.Item("pnl_" & NoOfTabs)
PREV = TryCast(PrevPanl.Controls(NoOfPages - 1), ConditionReportPage5)
PG5E.Location = New Point(frm_Main.FirstPageX, Math.Abs(PREV.Location.Y + 1000))
PrevPanl.Controls.Add(PG5E)
NoOfPages = NoOfPages + 1
End If
ExtensionConfig.DoubleBuffer(PG5E, True)
PG5E.SetNewDef()
PG5E.PageNo = NoOfPages
End sub
Any suggestions?
Related
I am trying to add multiple labels to a userform at runtime
It's for the player names of a board game; and until the game starts the number of players are not known. I have managed to figure out for myself how to use the dynamic array function to create the list of players. I used a For.....Next loop to add the player names. I thought I could do that to add the labels to the form, but it only adds one. Depending on where the new control type is declared, it either adds the first player only, or the last player
This code produces one label only within the groupbox, the last player
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim Players_Num As Integer = InputBox("Enter the number of players")
Dim Players(Players_Num) As String
Dim newText As New Label
For i = 0 To Players_Num - 1
Players(i) = InputBox("Enter player name")
Next
'This piece of code was jsut for me to test that I was successfully using a For...Loop
'to add the players names, and will be deleted later on
For x = 0 To Players_Num - 1
MessageBox.Show(Players(x))
Next
For z = 0 To Players_Num - 1
newText.Name = "txt" & Players(z)
newText.Text = Players(z)
newText.Size = New Size(170, 20)
newText.Location = New Point(12 + 5, 12 + 5)
GroupBox1.Controls.Add(newText)
Next
End Sub
End Class
This one places only the first player
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim Players_Num As Integer = InputBox("Enter the number of players")
Dim Players(Players_Num) As String
For i = 0 To Players_Num - 1
Players(i) = InputBox("Enter player name")
Next
'This piece of code was jsut for me to test that I was successfully using a For...Loop
'to add the players names, and will be deleted later on
For x = 0 To Players_Num - 1
MessageBox.Show(Players(x))
Next
For z = 0 To Players_Num - 1
Dim newText As New Label
newText.Name = "txt" & Players(z)
newText.Text = Players(z)
newText.Size = New Size(170, 20)
newText.Location = New Point(12 + 5, 12 + 5)
GroupBox1.Controls.Add(newText)
Next
End Sub
End Class
I've tried this in vs 2015 and 2019 Community
Where is it going wrong?
From the looks of the code, you are correctly creating the controls but their location is the same for all of them, essentially, they are being place one of top of the other, the first is hidden with the second, which is hidden with the third.
The line
newText.Location = New Point(12 + 5, 12 + 5)
needs to be modified to place the labels at different locations.
Perhaps, something like:
newText.Location = New Point(12 + 5, 12 + (z * 25))
This will vertically align the labels with a gap of 25 between them
You are placing them all in the same location
newText.Location = New Point(12 + 5, 12 + 5)
Use your 'z' index to place them at different locations in order to be able to see them
For me it is easier to contain controls in a TableLayoutPanel then add the TLP to what ever control collection, such as a GroupBox This way you can couple a Label with TextBox, for example. Here's an example how you can create controls from a DataTable. In your case you would only need 1 ColumnStyle for labels, I just thought I would show you a good practice for future shortcuts. (I rarely use the designer to place controls)
'Start test data
Dim DtTable As New DataTable
With DtTable
Dim NewDtRow As DataRow = .NewRow
For i As Integer = 0 To 25
Dim DtCol As New DataColumn With {.ColumnName = "Col" & i, .DataType = GetType(String)}
.Columns.Add(DtCol)
NewDtRow(DtCol.ColumnName) = "Test" & i
Next
.Rows.Add(NewDtRow)
End With
'End test data
Dim TLP1 As New TableLayoutPanel With {.Name = "TlpFields"}
With TLP1
.BorderStyle = BorderStyle.Fixed3D
.CellBorderStyle = TableLayoutPanelCellBorderStyle.Inset
.AutoScroll = True
.AutoSize = True
.RowStyles.Clear()
.ColumnStyles.Clear()
.Dock = DockStyle.Fill
.ColumnCount = 2
.ColumnStyles.Add(New ColumnStyle With {.SizeType = SizeType.AutoSize})
End With
For Each DtCol As DataColumn In DtTable.Columns
With TLP1
.RowCount += 1
.RowStyles.Add(New RowStyle With {.SizeType = SizeType.AutoSize})
'create labels
.Controls.Add(New Label With {
.Text = DtCol.ColumnName,
.Anchor = AnchorStyles.Right}, 0, .RowCount)
'create textboxs
Dim TxtBox As New TextBox With {
.Name = "TextBox" & DtCol.ColumnName,
.Size = New Size(170, 20),
.Anchor = AnchorStyles.Left}
'add binding
TxtBox.DataBindings.Add("Text", DtTable, DtCol.ColumnName)
.Controls.Add(TxtBox, 1, .RowCount)
End With
Next
Controls.Add(TLP1)
I'm new to vb.net and always searching for solution. My forms involved are MainMenu, poCustom, and rdlcForm. All are working well until I got a new look with MDI Forms.
My "New" MainMenu are now containing the poCustom into a Groupbox. Which I searched the code as
For Each f As Form In Application.OpenForms
If TypeOf f Is poCustom Then
f.Activate()
Return
End If
Next
Dim ch As New poCustom
ch.TopLevel = False
ch.Visible = True
ch.StartPosition = FormStartPosition.Manual
Dim leftStart As Integer = 1220 - (ch.Width + (SystemInformation.Border3DSize.Width * 2))
Dim topStart As Integer = 670 - (ch.Height + (SystemInformation.Border3DSize.Height * 2))
ch.Location = New Point(leftStart, topStart)
GroupBox1.Controls.Add(ch)
Problem: The rdlcForm(report) cannot get the value of textboxes in poCustom form. Code below:
Private Sub rptPOView2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim rptParam1(11) As Microsoft.Reporting.WinForms.ReportParameter
rptParam1(0) = New Microsoft.Reporting.WinForms.ReportParameter("rptDate", poCustom.Label1.Text)
rptParam1(1) = New Microsoft.Reporting.WinForms.ReportParameter("rptREF", poCustom.Label5.Text)
rptParam1(2) = New Microsoft.Reporting.WinForms.ReportParameter("rptCompany", poCustom.CompanyName.Text)
rptParam1(3) = New Microsoft.Reporting.WinForms.ReportParameter("rptQTY", poCustom.txBoxQTY.Text)
rptParam1(4) = New Microsoft.Reporting.WinForms.ReportParameter("rptUOM", poCustom.txBoxUOM.Text)
rptParam1(5) = New Microsoft.Reporting.WinForms.ReportParameter("rptDesciption", poCustom.txBoxDesc.Text)
rptParam1(6) = New Microsoft.Reporting.WinForms.ReportParameter("rptUnit", poCustom.txBoxUnit.Text)
rptParam1(7) = New Microsoft.Reporting.WinForms.ReportParameter("rptTotal", poCustom.txBoxTotal.Text)
rptParam1(8) = New Microsoft.Reporting.WinForms.ReportParameter("rptSubTotal", poCustom.Label25.Text)
rptParam1(9) = New Microsoft.Reporting.WinForms.ReportParameter("rptVAT", poCustom.Label26.Text)
rptParam1(10) = New Microsoft.Reporting.WinForms.ReportParameter("rptTotalAmount", poCustom.Label27.Text)
rptParam1(11) = New Microsoft.Reporting.WinForms.ReportParameter("rptRequest", poCustom.Label30.Text)
ReportViewer1.LocalReport.SetParameters(rptParam1)
Me.ReportViewer1.RefreshReport()
TextBox1.Text = poCustom.CompanyName.Text
End Sub
Which happens to work without using MDI Forms. I would like to know the cause of the problem for future use. Thank you in advance!
You are using two different instances of poCustom. ch is the first, and you populate its textboxes. But on the rptPOView2_Load event, you are using the other instance, which contains textboxes that has no value yet. One way to fix the problem is to use poCustom itself and not ch.
poCustom.TopLevel = False
poCustom.Visible = True
poCustom.StartPosition = FormStartPosition.Manual
Dim leftStart As Integer = 1220 - (ch.Width + (SystemInformation.Border3DSize.Width * 2))
Dim topStart As Integer = 670 - (ch.Height + (SystemInformation.Border3DSize.Height * 2))
poCustom.Location = New Point(leftStart, topStart)
GroupBox1.Controls.Add(poCustom)
this code lets me set the location of the form each time I drag my map.
Private Sub map_OnMapDrag() Handles map.OnMapDrag
If f2c1.Visible Then
f2c1.Location = camera1.LocalPosition + New Point(20, -240)
End If
If f2c2.Visible Then
f2c2.Location = camera2.LocalPosition + New Point(20, -240)
End If
If f2c3.Visible Then
f2c3.Location = camera3.LocalPosition + New Point(20, -240)
End If
End Sub
however, I want it on a public sub..
and this code, which I think gets all the visible forms ..
Dim forms = Application.OpenForms.OfType(Of frmCamera)()
While forms.Count > 0
forms(forms.Count - 1).Visible = True
End While
how can I make it so that all visible forms gets their location everytime I drag it, so that even if I dynamically added another form it won't be a problem. that's my goal.
can you guys fix this for me..
Dim forms = Application.OpenForms.OfType(Of frmCamera)()
While forms.Count > 0
forms(forms.Count - 1).Visible = True
End While
forms.Location = 'location that I want
Try this:
Dim forms As Collections.Generic.IEnumerable(Of frmMain) = Application.OpenForms.OfType(Of frmMain).Where(Function(frm) frm.Visible)
For Each f As Form In forms
f.Location = New Point(0, 0) ' set coordinate as needed
Next
In VB.NET, I need to print multiple Images of bar codes by arranging them in tabular format. For now what I am doing is, Creating the bar codes and adding them in new picture box. These Picture boxes are added on a panel which I am creating on form at run time and print that panel (with picture boxes in 4x9 table).
But, when I need to print more that 36 bar codes, this idea doesn't work.
So, Please suggest me some improvements in my code or any other way to do this job.
I am sorry, here is the code for generating images and adding them to the panel..
''' Method for create bar code images with a loop and adding them to the panel by picture box...
Private Function GetBarcodeText(RowId As Guid)
Dim BarcodeValue As StringBuilder = New StringBuilder(96)
Dim temp As New StringBuilder
Dim data As String
Dim param = New SqlParameter()
Dim imageNo As Integer = 0
Dim colorValue As String = ""
Dim scaleValue As String = ""
'' Adding the panel on the form which is dynamically created
Me.Controls.Add(outputPanel)
'' Setting the Initial size for the panel
outputPanel.Size = New Point(794, 112)
outputPanel.Name = "outputPanel"
outputPanel.BackColor = Drawing.Color.White
param.ParameterName = "#RowId"
param.Value = RowId
param.SqlDbType = SqlDbType.UniqueIdentifier
' Get the particular row of data from database
dt = objStockProvider.GetBarcodeDetails(param)
' GET colour code
Dim color As String = dt.Rows(0)("COLOUR").ToString()
Dim countColors As Integer = 0
' Get the color code numbers
param.ParameterName = "#Dscale"
param.Value = dgvViewTickets.CurrentRow.Cells("SCALE").Value.ToString()
countColors = objStockProvider.CountColorCodes(param)
For i = 1 To countColors
For j As Integer = 1 + ((12 / countColors) * (i - 1)) To (12 / countColors) * i
If dt.Rows(0)("S" + j.ToString()) <> 0 Then
Dim totalTicketsForASize As Integer
totalTicketsForASize = dt.Rows(0)("S" + j.ToString())
For k As Integer = 1 To totalTicketsForASize
' Set Bar code value which has to create
BarcodeValue = "123456789012"
' Create Barcode Image for given value
Dim image = GetBarcodeImage(BarcodeValue, colorValue, scaleValue)
If image IsNot Nothing Then
'' Create picture box to contain generated Image.
Dim pcbImage As New PictureBox
pcbImage.Width = W
pcbImage.Height = H
pcbImage.Image = image
pcbImage.Location = New Point(X, Y)
imageNo += 1
If imageNo Mod 4 = 0 Then
X = 15
Y += H
outputPanel.Height += H
Else
X += W
Y = Y
End If
pcbImage.Visible = True
'' Adding picture box to panel
outputPanel.Controls.Add(pcbImage)
End If
Next
End If
Next
color = color.Substring(color.IndexOf(",") + 1, color.Length - color.IndexOf(",") - 1)
Next
PrintGeneratedTickets()
End Function
Now, I am printing the panel by following method:
Private Sub PrintGeneratedTickets()
bmp = New Bitmap(outputPanel.DisplayRectangle.Width, outputPanel.DisplayRectangle.Height)
Dim G As Graphics = Graphics.FromImage(bmp)
G.DrawRectangle(Pens.White, New Rectangle(0, 0, Me.outputPanel.DisplayRectangle.Width, Me.outputPanel.DisplayRectangle.Height))
Dim Hdc As IntPtr = G.GetHdc()
SendMessage(outputPanel.Handle, WM_PRINT, Hdc, DrawingOptions.PRF_OWNED Or DrawingOptions.PRF_CHILDREN Or DrawingOptions.PRF_CLIENT Or DrawingOptions.PRF_NONCLIENT)
G.ReleaseHdc(Hdc)
pndocument.DocumentName = bmp.ToString()
Dim previewmode As New PrintPreviewDialog
previewmode.Document = pndocument
previewmode.WindowState = FormWindowState.Maximized
previewmode.PrintPreviewControl.Zoom = 1
pndocument.DefaultPageSettings.Margins.Top = 10
pndocument.DefaultPageSettings.Margins.Bottom = 30
pndocument.DefaultPageSettings.Margins.Left = 16
pndocument.DefaultPageSettings.Margins.Right = 16
pndocument.DefaultPageSettings.Landscape = False
' Set other properties.
previewmode.PrintPreviewControl.Columns = 4
previewmode.PrintPreviewControl.Rows = 9
previewmode.ShowDialog()
Dim file As String = DateTime.Now.ToString()
file = Path.GetFullPath("D:\Bar Codes\" + file.Replace("/", "-").Replace(":", ".") + ".bmp")
bmp.Save(file)
G.Dispose()
outputPanel.Controls.Clear()
End Sub
This code is working fine but what I need to do, is to fix the number of images (4x9) per page. But when I am trying to create more than it, that all are printing on a single page with compressed size.
Also when trying to re-run the code, It shows nothing in preview..
Some body please suggest the correction in code so that I can reprint the tickets and use paging for more than 36 images.
Well, Printing the Images on a panel was not a good idea.. I replaced the panel and created an array of images and used the print document directly and print after arranging images on it.
Thanks.
I'm able to add multiple datagridview 1 after another on panel.
by adding code of SysDragon from the same forum
Dim AllDataGrids As List(Of My_custom_DGV)
Dim lastCtrl As Control
AllDataGrids = New List(Of My_custom_DGV)
For j As Int32 = 0 To 3
Dim aDataGridView As New My_custom_DGV()
aDataGridView.for_date = ""
aDataGridView._count = week_count
aDataGridView.Dock = DockStyle.Top
aDataGridView.Dock = DockStyle.Right
aDataGridView.Dock = DockStyle.Left
aDataGridView.Dock = DockStyle.Bottom
AllDataGrids.Add(aDataGridView)
Next j
For i As Integer = 1 To 3
Dim dgv As My_custom_DGV = AllDataGrids(i)
' Dim dgv As DataGridView = AllDataGrids(i)
If dataGrid_Panel.Controls.Count.Equals(0) Then
dgv.Top = DataGridView1.Height + 20
Else
lastCtrl = dataGrid_Panel.Controls(dataGrid_Panel.Controls.Count - 1)
dgv.Top = lastCtrl.Top + lastCtrl.Height + 5
End If
dataGrid_Panel.Controls.Add(dgv)
Next
the problem is that when i scroll in between them then it is looking very bad(i.e. as i scroll,it is repeating the the image on panel again and again). does it render the view again when i Scroll,and may be calling the paint method of datagridview repeatedly. if yes then what is the solution?
Thanks.