I'm a beginner to VB2010. If I draw a red line on a BLANK form, obviously its red. But if I draw a second red line, which crosses the first, is there a way of controlling the colour at the crossover position, for example returning it to the original colour of the form?
View 4 RepliesPublic Class Form1
Dim x As Integer, y As Integer
Dim img As Bitmap
Dim pixelColor As Color
Public Function getpixel(ByVal x As Integer, ByVal y As Integer) As Color End Function Private Sub find_img_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles find_img.Click
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whenever i load the image, i have to load it a second time to get the colour, or if i load a new one, i get the colour from the previous image, any ideas as to why?
I am using vb2010 and the like @lastname +'%' to try and create a search query. It seems to work until I try the test query which brings up nothing within the test query window. Sometimes it even seems to wipe out the data I have put in for testing. I did get it to work once in one project.
View 3 Repliesi connect the Datagridview by using command connection not coding. now i have "table3tableadabter", "table3bindingsource" and "database3dataset" below the form ? the search string " "Select * from tabel3 Where test2 like '" & Me.TextBox1.Text & "%';"" how i can do serch and the result will be shown in datagridview.
View 4 Repliesi am want to draw lines on a picture for my project.Apart from the PictureBox1.Refresh() function, i wanted to know which other functions can be applied to a PictureBox.Moreover, I am trying to draw a line from a point to another several times on the same picture.I am actually using the PictureBox1.Refresh() that is not effective in my case when I want all the lines I draw to remain on that same picture. Currently, when I am trying to draw another line, the first one is cleared and the new one only is shown.
View 1 RepliesI just want to draw some lines between the rectangles in vb.net. I used g.drawstring() method to that.
But now, based on a value I just want to change the opacity of the arrow.
I support a program that captures a drawings from a digitizer tablet. The tablet functions as sort of a mouse and the user uses a Stylus to draw (sign) their name into documents. An issue that has come up is that the user signs their name but the line that the signature is build with has noticable holes in it. Kind of like having a pen that skips when you write. The information is communicated into a PictureBox using a DrawLine Function where it passes the line color, the previous point and the current point.Kind of stuck with this, not sure why the tablet would produce a spotty signature when the stylus is in contact the whole time with the tablet. I have yet to port out the line x,y points to see if the tablet is producing consistent points but this is the next step.
View 5 Replieshow to remove a line?I have:
Dim PenColor As New Pen(Color.Black) and after I received the values I draw the line with:
objGraphics.DrawLine(PenColor, Xstart, Ystart, Xend, Yend)
The user can do this 10 times... (so 10 lines)...But if the user presses a cancel button, the last line drawn shall be removed (and the user can click until he is back at 0)..Would I use PenColor white here (to draw over the line)? Or is there a way to remove line directly in visual basic? I couldn't find it.
I have a AxAcroPDF on a from which i added from the toolbox I can draw on the form using this code
Private m_Drawing As Boolean = False
Private m_LastPoint As Point = Nothing
' Start drawing.
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Is it possible to draw directly onto the AxAcroPDF Control?
The AxAcroPDF Control dosnt have the mouseup and mouse down declatations so i am unable to easily adapt the code.
I want to draw lines (paths) for AI to follow. I need to know the X,Y coordinates of each pixel in the line.Lines drawn straight vertical (0 or 180 Degs), diagonal (45 or 225 Degs), or horizontal (90 or 270 Degs) are easy to map.I need to know how to map straight lines that are not one of the those three. Like 1 degree to 44 degrees, 46 degrees to 89 degrees, and so on...
View 1 RepliesI am trying to draw a bus route as a simple sequence of lines. Nothing fancy. But instead of lines, I'm getting wedges. Initially I was fine with this, because the wedges sortof look like arrows and always face towards the second point. But now I want to improve the look, and the wedges are becoming a big problem.
My suspicion is some sort of floating-point issue due to the graphics transform (lat/lons are fed in and the transform turns them into x/y on the bitmap [assuming lat/lon is euclidean is accurate enough for my purposes], so the scaling is several orders of magnitude).
Screenshot:
It actually kind of looks like the line was split into two triangles but only one of them was drawn.
Relevant Code (note: drawing is done asynchronously, which is why I'm creating a bitmap):
'-- Creating the transform --'
Dim bitmap = New Bitmap(Math.Max(1, PictureBox1.Width), Math.Max(1, PictureBox1.Height))
Dim g = Graphics.FromImage(bitmap)
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Using DrawLines instead of DrawLine solves the issue (but why?) Increasing the pen thickness makes the issue go away (but the lines are too thick) Zooming out (increasing lat/lon view window) makes the issue go away, eventually (but I want to zoom in!)
Hi, I'm using the Drawline method by capturing coordinates entered into 4 textboxes and then printing the image onto a picturebox. However, I can't get the previous line to be redrawn along with the new line that needs to be drawn. I understand that it refreshes when using the picturebox.refresh() function.
The code is:Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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Is there any way to have 2d graphics that gets made by user through manual dimensions input be bound to a text box?
Is there any way to take position 1000,600 and make that zero? Can we make graphics by inputting only the next co-ordinate and have the pc automatically draw a line from last point?
Also, whats the difference between drawline and draw path? How can I get the shape to remain on screen when I toggle between pages?
After running into much difficulty getting started on my little planner attachment, I found this C# program (calendar_src) floating around on the net...somewhere. So I have been working on trying to convert this from C# to VB, which I have been using an online converter. From what I know I have been going through and trying to edit the code after it has been converted to VB code as best as I can. But now I have limited the errors from over 50 to these:
Error1Overload resolution failed because no accessible 'DrawLine' can be called without a narrowing conversion:
'Public Sub DrawLine(pen As System.Drawing.Pen, x1 As Integer, y1 As Integer, x2 As Integer, y2 As Integer)': Argument matching parameter 'y1' narrows from 'Double' to 'Integer'.
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Not only this, the VB main Form1 isn't showing the "DayView1" control that the C# one is. When I first created the VB app, I didn't know how to make 2 projects in 1, so it's probably wrong altogether...but I tried. The only reasons I am wanting to go off of someone else's control is because it only lacks 1 feature that I want, and that's having a full month view, not just limited to 1-3-5-7 day views.
I have a text box where I write different frames from a serial port.
I'd like to write those frames in two different colours but I don't know how to do it.
If I change the option Textbox.Forecolor, it changes the colour of every single line, and that's not what I am trying...
With my program I have made a settings form - changing the colour of other forms- and instead of writing the code for each individual form I was thinking if I can create an automatic system. The forms have different types of names & the items within have different names.In the setting form i have 3 color dialogs (one for background,Text colour -labels-, and a button color -forecolor-)
Code for Formsettings
Public Background As Color
Public TextForecolour As Color
Public buttontext As Color[code]......
i cant remember how to get font colours to change, so thought doining it with the hello world would be best
View 1 RepliesI have a colour that is not predefined and I want to change the selectionbackcolor in a DGV. In the DGV it is defined as 255,255,192.
RoomNamesDGV.DefaultCellStyle.SelectionBackColor = " a colour "
How do I set the colour using 255,255,192.I need to do this as I have 2 DGV side by side and I want to show where the focus lies.
I am looking for a way or a code that will change the colours used in a powerpoint presentation, I will also need to change the background colours of active x text boxes etc.
View 6 RepliesI am using Visual Basic.NET 2008. I was earlier a VB 6 developer. I found a (VB 6) code online which generates gradient colours on a form. It has a small sub (routine) which does the trick. If we pass red, green and blue values then form's backcolour changes and it appears like a gradient.Now that code is not working in VB.NET.i mean is there an easier way to generate gradient colours in VB.NET (2008)convert the code I have into .net specific so form's backcolour becomes gradient.I have attached a zip file which contains the code.
View 11 RepliesI've found out how to change colours for the text editor, etc, but is there any way to change the colours in the help? It'd be nice to be able to have [for example] white text on a black background. It'd be easier on the eyes for lengthy reading sessions.No crops were circled, or animals mutilated in the making of this sig.
View 3 Replieshow to work with monthcalendar and their colours?We have lots of problems to work with calendar colors now... (basically change color date, backgrounds, etc... any alternative to have a calendar with the chance to change the dates and backgrounds?)
View 3 RepliesIs it possible have different colours in each of the cells of a TableLayoutPanel?
View 10 RepliesI've got a picturebox where someone can draw what they like on it and I have added a colordialog so the person can change the colour of the pen.[code]The trouble is, when I change the colour, the stuff ive already drawn on the picturebox changes colour too but I want it so that it only changes the colour of the pen and not what has already been drawn
View 3 RepliesI'm trying to make it so my textbox is colour-coordinated automatically. By this, I mean that if a line begins with a certain bit of text (for example, a line starting with <text>) then it will make the whole line red.I realise that this may not be possible with a standard textbox, so I don't mind any suggestions that need an RTF item.
View 1 RepliesCan I create a Pen dashpattern that consists of alternating colours rather than a solid colour followed by a space? For example:
LinePen.DashPattern = New Single() {6, 4}
creates a pattern with a dash of 6 pixels followed by a space of 4 pixels. Rather than a space, I would like a different solid colour. That way I could create a rectangular cursor with something like a black/white alternating pattern, which would be clearly visible on top of any picture.
How can I build a combo box showing the extended colours like image below?
View 4 RepliesI have an application that dynamically draws a chart onto a winform.Both the chart background and the individual chart bars are drawn using a VisualStyleRenderer object: For Each rect As Rectangle In barRectangles
Dim renderer As New VisualStyleRenderer (VisualStyleElement.StartPanel.UserPane.Normal)
renderer.DrawBackground(e.Graphics, rect)
next
this draws a nicely rendered rectangle with full XP visual styles, my question is: how do I change the colours used to draw the shape?
I've got a bar chart on my form which when I click a button, it populates with some data showing the clients net position, which is their assets vs their liabilities. This is shown on a year-by-year basis, so the graph will go up or down accordingly. If the graph goes into negative, or is negative at any stage, I would like it to turn red, and leave the positive values green. I have no idea how to do this, or even where to start looking into the properties. I'm still new to using the charts. How can I make the x-axis labels in increments of 5 from 0, instead of increments of 5 from -1?
View 3 RepliesI have an VB.net application in which I have imported the MSchart control 6.0. It draws all the bars in the same colour. I want to have each bar in different colour. I want bars of the same series to be so. There is only one series of data.
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