I am drawing lines on a picturebox - not in the paint event. I realise that if I resize the PictureBox the lines won't be redrawn - but the PictureBox is fixed. If I display a MessageBox at the end of my draws the lines do not remain on the screen. This was OK with VB 6.0. Hoe can I stop them being erased?
View 2 RepliesWhen I populate a combobox with items that have a line and text drawn in the DrawItem event, only the line image for the first item in the list appears in the drop down portion of the combobox. The other items (index>0) shown in the drop down portion of the combobox do not contain an image of the line, yet each item in the list does contain the designated text. The correct line image does appear when the user selects an item and the drop down portion of the combobox is not visible. How can I get the line image to appear in every item of the combobox when the drop down list is activated?
Public Class Form1
Friend WithEvents ComboBox1 As ComboBox
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.ComboBox1 = New ComboBox
With Me.ComboBox1
[Code] .....
how to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn
View 1 Replieshow to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn
View 3 Replieshow to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn
View 3 RepliesOn my form, I have a picture box that starts off blank, but draws lines according to mouse click events.
I am now trying to test whether there is colour in individual pixels, yet I am yet to find solid code.
My initial code was along the lines of
Dim bitm as bitmap
bitm = PictureBox1.Image
This would come up with nothing, as there wasn't any image assigned to the picture box.
I was wondering how I could save the lines drawn and use that as a bitmap to test pixel colour.
Next listbox value:
1
2
3
4
5
6
7
8
9
10
11
I want to remove the first 9 lines remain in listbox:
10
11
I have mdi application, on main form which is mdi container and has a tree view. i open the child form on afterselect even of treeview. the issue i'm facing that i open the form but focus remain on tree view until i click on the the form. my question is how i can give focus to form rather it stays on treeview. i tried frm.focus also activatemdichild(frm) no sucess.
View 21 RepliesI have a VB. Net App where I want the user to open a modeless form which contains reference information about items in a select box. If the user double clicks the item selected in the list box a modal form is opened to edit the item.I want the previously opened reference form to remain active/enabled, that is, I want the user to be able to click on it, move it, etc.I was able to get the form to at least show up on the task bar by setting it's "ShowInTaskBar" property to true, however, when it comes to the front the user can still not move it to the side to view all of the Edit Forms information.
View 7 RepliesI'm creating a custom form that is composed of a inner stroke, outer stroke, and rounded rectangular background. When the form is initially drawn its drawn fine without errors but once i re size it, the old form is still drawn and the new form is drawn below it but once i minimize the form and restore it, it goes back to normal (only the new form is being drawn).
View 2 Replies' Show game directions.[code]...
I think this is actually really easy to do that it isn't documented on here or msdn.
I am working on a snake game for my portfolio and was wondering where the best place to put the logic for drawing the snake. Should the code reside within the snake object or within the form? Either would work, but I am wondering from a business objects/coding standard perspective where such code belongs.
View 2 RepliesI need to draw several line-graphics on a form, then select and drag individual graphics to new locations. Is it possible for example to give each graphic path an identity when drawn, then select any one (via mousedown, whatever) and link it to the dragged mouse co-ordinates until released? MS Visio has exactly this ability - can it be done in .NET?
View 4 RepliesI have 3 textboxes. I want Button3 to remain disabled until ALL three are filled out. This seems to work, but for only ONE textbox:
If Textbox1.Text.Trim <> String.Empty then
Button1.Enabled = True
Else
Button1.Enabled = False
End If
I have dropdownlist and set autopostback Property to true.. the problem is that i when i change index of dropdown list Page gets postback. After Completion of Page load index of dropdown goes to 0 automatically.
How can i remain index of dropdownlist after Postback
im using my logic in the page load fn. i have an variable id. while loading page the variable id want to increment by 1 and value remain same... initially the id have 0 while calling the page load 4 times this value have to be 4.
View 6 RepliesI am using this code to draw a line on a form using textboxes as the x and y coordinates. I then click the button with the code below that will draw the line.
Before the new line is drawn, I would like to have previous lines deleted first.
How can I delete these lines?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim canvas As New ShapeContainer
[Code].....
For some reason, every time I hit the red "X" button to close the program. The program closes, but the process is still there. How do I make it so that if I press it, itll end the process too?
View 6 RepliesIm opening an excel document with vb.net and i dont want vb.net to close it but to release excel so that when the user closes excel it does not remain as a running process... which it currently is doing here is the code i was using
[Code]....
Recently I was working on a project in VB.NET, and I was encountering a mysterious problem with some of the DB connections. This was a project that I inherited from someone else and they had used something like this:
Dim reader As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection And CommandBehavior.SingleRow)
//after reading data
reader.Close()
It appears as though this was causing the connection to not close properly all the time. I've removed the CommandBehavior.SingleRow, and it seems to be working ok now, but I was wondering if anyone else has encountered this? Does anyone know why that would not work? I've seen CommandBehaviors combined in this way before, but it has never caused that problem before.
I have a datagridview for user's input. For example, the columns are "Name", "Date of Birth"... For the "Date of Birth" part, i have implemented validaion... i want to make it that user have to enter a valid "Date of birth" before they are allowed to leave the Cell. Meaning once them entered the Cell, they have to provide a valid "Date of birth" then they can move on.
[Code]...
I am using a GridView with its first column as a template field with radio buttons.
I need to make the first radio button in the first row of the grid remain default selected during page load / postback.
I have 2 drop down lists and 1 submit button. It works such that after the user has selected values from BOTH the drop down lists, then the user will click a "Search" button. My problem is, after the user click the "Search" button, the second drop down list is no longer displayed with the selected value, instead it displayed a default value. May I know how can I make sure the selected value remain selected even after the user clicks the "Search" button on the page?
For your info, my coding goes as
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim strSelectedUsername As String
[Code]....
i want to "draw" zebra lines in my form [code] ican import background image, but I prefer code :)
View 1 RepliesThe image editor toolbar is not active. I would like to draw lines and shapes on a form.
View 1 RepliesI have made a drawing program. It draws a line when you click in the form, but if the form is minimized or another window is on top of it, the lines disappear partially.
Here is the
Dim FormMiddleX As Integer
Dim FormMiddleY As Integer
[Code]....
I am trying to scroll lines of text on a Form.
ie:
I add via (addString plus fill Path to give Outline Text) for say eight lines of text (which fill the screen with margins set at top and bottom) from a DatagridView control but there are say ten lines to that section, so I want to use the down arrow to scroll the lines up the screen, so the top two go off the top of the screen(hiden by margin boxes) and the last two added at the bottom. I have this all working but there is a lot of flickering, how can I do this more smoothly? I think it is the Form.refresh that causes the flickering, I have tried ResetText, Invalidate and Graphic.Clear, but none seem to make it smooth.
Sections of code:
'Adds line
For A = LineStart To LineSelEnd + 1
strItem = DataGridView1.Item(1, A - 1).Value
Dim useFont As Font = New Font(SongFont, CInt(SongSizeP), SongStyle)
[Code]....
create lines in a VB .NET form? I can't see any correspondent control .I have used the Visual Basic Power Packs 3 , but there are two problems :- I can not select simultaneously both the lines and the labels .- When �sending to back� the labels , I can�t pick them again .Is there any other way to create some lines on the form ?
View 13 RepliesI need to draw lines, in one VB form. Like paint, I need the tool brush, and design some lines and curves in a Vb form. How can I do this? I don't know where to start.
View 3 RepliesI want to draw three straight lines on a form. if the following code is correct:
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
Dim Line1 As System.Drawing.Graphics
[CODE]........
Can I use only one variable (Line1) to draw three straight lines?