I was wondering how to draw characters/string on a bitmap.For example: I have created a new Bitmap with resolution of 200x200. Now using Graphics.DrawString(), I have to draw text. I can draw text. But my question is, I want to fill it the image with that string.Say, the text be "abc".So, the output would look like this for 200x200 bitmap (assumption):
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Ok so I have a 3 fields in a webBrowser that my bot will need to fill. 1st field is the City: 2nd is the Place Name: 3rd is the Street Address: Here is an example of my addresses:
~1Cafe~2 ~322 Queen st.~4 ~5Toronto~6 So for the city I will need to fill it with all the text in between ~5 and ~6. Right now this is what I have
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How to draw a bitmap in a picturebox based on coordinates of the bitmap inside the picturebox not the form
View 3 RepliesI need to draw a border of a certain width around a new bitmap.
I want to use Graphics.DrawLines, because i may want to draw the Horizontal or Vertical borders only.
For Example:
Code:
'Add this to a button on a blank form
Dim Canvas As New Bitmap(100, 100)
Dim G As Graphics = Graphics.FromImage(Canvas)
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Ive fiddled around with this, but i cant get the math right. What must i do to get the border of the correct width around my bitmap?
Also do i need the first "G.Dispose()"?
I read that using Graphics.FromImage(bmp) will let you draw to a bitmap. I have this
vb.net
Imports System.Threading
Public Class Form1
Dim paintcolor_current As Color = Color.Black
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Can I Draw text onto a bitmap? or can I convert a string to a bitmap?
View 4 RepliesIn VB6 I drew a bitmap pixel by pixel (the pixel would a small square - not a pixel on the screen) using the line command, the coords, the colour and using the 'box fill' parameter [code]...
View 2 RepliesI have 2500 numbers in an array all representing a corrosponding tile, [code]...
View 1 RepliesOk well im making a game maker =) but there are some problems that need to be fixed =(. Ok well the first one is bitmap, It takes up to make space and it has a size limit. Is there something like bitmap that will let me draw images onto a picturebox or something like that with unlimeted space and it deos not to up much memory space? cause there are some game makers with huge maps and they used visual c++ but how i dont know
View 13 RepliesI am building an app that builds a bunch of cardinal splines by storing their PointF structures in arrays. As the program runs, new points are added to the arrays, and the graphics are drawn to a bitmap. I can let it run for ages and the splines just keep growing like they should with no problems. The amount of points in each spline can grow into the thousands. To speed up execution as time progresses, I don't completely redraw the splines after each pass, I simply draw the last segment of the spline to the bitmap, having let the bitmap 'record' the earlier part of the splines.
But if I pan across the scene or zoom in/out of it, then I DO have to completely redraw the splines, since the size and resolution of the display is limited to its dimensions. Panning works, no problem. But if I zoom in and out of the bitmap with the mouse wheel, after about 14 wheel clicks, I get an "Out of Memory" error. BUT...I have it set up so that whenever the mouse wheel turns, the graphics and the bitmap are disposed so that new ones can be built for the new zoom setting. So why would the program run out of memory when as far as I can tell, I am disposing of all my unused, unmanaged resources on a regular basis?
faster way to flood fill an area of a bitmap? It basically acts just like the fill flood bucket in MS Paint. clsBitmapImage is a Bitmap variable.
Code:
Code:
Public Sub FloodFill(ByVal AtPoint As Point, ByVal newColor As Color)
Dim oldColor As Color = clsBitmapImage.GetPixel(AtPoint.X, AtPoint.Y)
If oldColor.ToArgb <> newColor.ToArgb Then
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I want to fill the strings of the time in each column with the information in each row from the webpage and input the strings onto the datagridview.
Public Function readwebpage(ByVal url As String) As String
Dim objRequest As WebRequest = System.Net.HttpWebRequest.Create("http://entertainment.ie/TV_Listing/28%20November%202009/451/ITV2.htm")
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On Visual Studio 2008 I am running into problems with strings longer than 30 characters, which become blank. My context is slightly unusual (perhaps) - but I dont see why it should not work.I am calling a VB2008 script from C++ using the COM interface [URL].. It works fine with integer and real arguments, and with strings up to 30 characters long.(see below - the example above is easily generalized to arguments as String, in which case the C++ code declares a BSTR object and uses L"xxxx" to set the string to "xxxx").
Surprisingly, I get a problem if the C++ string exceeds 30 characters in length - the string received by the VB routine becomes "" , ie, completely blank.I checked and this is not just a limitation of the debugger viewer - it really is "". However there is no problem with local strings exceeding 30 chars - the problem appears in passing of the argument, both byVal and byRef.
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So I've got a list of strings in ListBox1 and I want to remove the last seven characters from each string in the list and write the output to an excel file...
View 3 RepliesI have a program where I copy strings from one file to another. I then create folders based on the strings. It works great 99% of the time. Once in a while I get this error:
Illegal Characters in Path
Here's the line of code where it happens:
If Dir$(txtSaveLocation.Text & "" & name1 & "" & name2, vbDirectory) = "" Then
It is just checking to see if the folder exists yet or not.
When I move my mouse over the variable "name2" the value shows up as
"test name 2
That's right, no closing quotation marks. How is this possible? If I manually add the quotation marks while in debug mode and restart execution the code works fine.
I do have a function to strip out illegal characters first too:
For loopCTR = 0 To strip.Length - 1 'strip characters out
name2= name2.Replace(strip.Substring(loopCTR, 1), "_")
Next
I am trying to split a data field in VB using the split function.
The data field has the following character strings"&|:"
which I need to base my split on.
Dim elements As String() = Regex.Split(dataField, "&|:")
field1 = elements(1)
field2 = elements(2)
The field1 and field2 still have a trailing "&|" chracters.How do I check if the field1 and field2 have these trailing characters? How do I delete them?PS - I have tried "&\|:" as the delimiters in the split function which did not work.
I'm making a custom control suited for handling passwords. I have created a control that inherits from a text box and I have implemented a lot of things so far. But what i want to do now is create a system so that when a user types It will display his last character typed for a X amount of time. Is there a way to turn only selected characters into password characters and still be able to get the password text from the Text property ?
View 4 RepliesIs there an easy way to find a certain string within a string and then return the strings that you find as an array?I have written this:
Public Function FindStrings(ByVal strSourceString As String, ByVal strStartString As String, ByVal strEndString As String) As String()
Dim StringStartposition As Integer
Dim StringEndPosition As Integer
Dim Currentposition As Integer = 1
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I have this string called time. It's value is in this format: HH:MM:SS The numbers change, but the format stays the same. I want to separtate the code into 3 strings Hour, Minutes, Seconds.
View 2 RepliesSay I have a List(Of Tag) with Tag being an object. One member of Tag, Tag.Description, is a string, and I want to make a comma-separated concatenation of the Description members.Is there an easier way to do this than to read the Description members into a List(Of String) and then use the Join function?
View 2 RepliesI'm using Bitmap to show picture box like slideshow using Timer. For each timer interval, I've to go for new instance of Bitmap, there System memory increases to 1MB, How to resolve this, 'BG is picture box
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tic Dim img As Bitmap
img = New Bitmap(System.Drawing.Bitmap.FromFile(FileIO.FileSystem.GetFiles
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I'm trying to use a ToolTip directly to a Bitmap Object (System.Drawing.Bitmap), aparently I can't do this because Bitmap isnt a Windows Control.
View 1 Replieshow can i create a monochrome bitmap from a semi transparent bitmap in vb.net? the bmp is for a transparency mask image for an icon i'm trying to create with the CreateIconIndirect API function.
i'm using vb2008 .Net3.5, but i would prefer an answer that would also work in vb2005
Imports System.Drawing
Imports System.Drawing.Imaging
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I am using this, however I get a GDI+ Unhandled Error.
I have 6 bitmaps, all the same size. Their ImageFormat is Format32bppPArgb. Sometimes when I try to resize the bitmaps I get the Out of Memory message. This doesn't happen all the time, only after about six or seven resizes.In Task Manager, the program's memory use never goes above 800k.Is there a way to resize a Bitmap without creating a new one?If I have to recreate the Bitmap, do I need to dispose the current one (or set it to Nothing)?
View 2 RepliesI have scanned a few img's on 600 DPI. When i load them into a Bitmap class They have Vertical and Horizontal Resolution of 96 PPI To my calculation that is very close to 38 Pixels per centimeter. Now the image that I scanned is 4.5 Centimeter (1.77165354 Inch) In Diameter but When I measure It the 4.5 cm img is close to 1080 pixel in Diameter which is 240 Pixels/Centimeter (609.6 Pixels/inch) What is the correct way to get the actual Pixels per inch/centimeter from a bitmap or was it set incorrectly by my scanner ?
View 7 RepliesI'm looking to make a program that would capture your whole screen, then have the picture display on the screen (simulating a frozen screen) to where the person handling the program could select a partial segment of the screen with their mouse and then save to a folder.
1. I have no idea how to go by doing this
2. My form is constantly minimized, so I have to do it without MouseDown on the form and whatnot.
How would I go by doing this?
I am trying to make an application that can do effects to images but the problem is when I use large photos its takes a very very long time. I am reading it per pixel with bitmap's GetPixel and SetPixel methods. Is there anyway to make this process faster without using C# or C++?
View 1 RepliesI'm trying to create a DLL with some useful methods and subs for my use. But when I tried declaring an object for Form or using the keyword Screen, Bitmap, etc.. gives an error saying that "The type 'Screen' is not defined" and like that..
View 7 RepliesIn my user control you can load an image into a Bitmap type, it then displays the image onto the usercontrol. However, it works fine with .gif format images, but when i use .png it seems to make the image bigger than what it is.
Private imgPicture As Bitmap
Public Property Picture As Bitmap
Get
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