I have made picture viewer in VB which also shows all the pics present in a folder as thumbnails using image list and listbox. The problem is whenever the user clicks refresh it takes long time for the image to load. I want to some how make a cache like thing where i can store the image for faster access in the future.
View 2 Replies
For a touchscreen oriented application, i have an onscreen keyboard that can operated by both the hardware keyboard, or via touchscreen/mouse. The user needs this keyboard a lot, but. Because it has so much buttons, it loads really slow and takes about a second to finally display.
My Onscreen keyboard is of type dialog, and its background is set to the transparency key. Once the form is there it works really well. the problem is the 1 second loading time, this can be pretty frustrating when you need to edit like 20 things. Is there any way to preload the keyboard dialog and make it popup instantly?
[Code]...
I have a field in the database that is XML because it represents a class that is used in C#/VB.Net. Problem is after the initial manipulation most, but not all, of themanipulation is done in SQL Server. This means that the XML field is converted on the fly.As we are getting more fields and more records, this operation is getting slow. I think the slow down is the converting all of those fields to other data types.So to speed it up I was thinking of a couple of ways:Have a set of tables that represent the different pieces of the XML data. I would make these tables read only using a trigger on Insert/Update that would reject any changes. My 'main' table with the XML in it when it updates the XML would turn off the triggers, update the tables with the new values then turn the triggers back on.
The only real reason we use the XML is because it's really easy to convert it to the class in C#/VB.Net. But I'm getting the point where I may end up writing a routine that will take all the bits and pieces and convert it to a class and also a function to go the other way (class -> tables).
i want to know, which way program runs faster1- add image to button through its property -> assign image from project resource file2- on form load event, assign images to buttons, from project resource file
View 19 RepliesI have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
View 8 RepliesI have this code
Public Function ColorInvert(ByVal pic As Bitmap)
Dim i, j As Integer
Dim c As Color
For i = 0 To pic.Width - 1 Step 1
For j = 0 To pic.Height - 1 Step 1
[Code]...
I'm looking to achieve merging of two images. Right now I can get the desired output but its slow for bigger images than 640*480 since it will actually be operating on video frames at least @25FPS.What I'm doing right now is copy both images pixel by pixel, like this. Actually its in c++ but I've converted it to vb code for understanding..
Dim image3 As Pointer(Of Char) = New Char(w * h * 4 )
Dim image1 As Pointer(Of Char) = img1.getPixels()
Dim image2 As Pointer(Of Char) = img2.getPixels()
[code].....
I'm writing a game in VB 2005 Express and at the moment it involves using the drawimage method to first draw a background and then various sprites onto my form every time a timer ticks. It's all double buffered so there's no flicker or anything but it just goes very slowly, how to speed it up. I've come across the term blitting (bitblt), which seems like it would be useful, but haven't been able to work out exactly what it is, whether it can be used in this version of vb, how to use it etc.
Here's my code (or at least an approximation of the relevant bits seeing as the whole thing is rather long):
Public Class Form1
Dim BackgroundImg as Image 'plus all of my sprite images declared
Dim Mybuffer As BufferedGraphics
Dim MyContext As BufferedGraphicsContext
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
Ive been programming in VB6 for years, i figured its time for an upgrade. Here's what im doing, and what the problem is:
Im loading a bunch of pictures on top of one image. They are all PNG files, and some of the images have transparent edges, and some semi-transparency within the image itself.
So basically, i need to be able to load these images on top of the other images, and still maintain the transparency.
Is this possible in VB08? This is one of the main reasons i moved to 08 from vb6, more things possible including multithreading.
I have a picture box on SSRS. I want to load a picture to it, for exam from D:\Pictures\TV1.jpg (actually user will decide it by using OpenFileDialog)I have set the Source to external and in Value expression I tired
="D:\Pictures\TV1.jpg"
and
Also
="/<d:\pictures>\TV1.jpg"
but my picture box shows error picture in both cases.
How do I save an image and then reload it from My.settings
View 1 RepliesI want to load picture dynamically within VB.NET and the following code does not work due to 'loadpicture' not existing in VB.NET.
picturebox.image=Loadpicture("tick.jpg")
i have a problem in loading an image from a file in vb.net. I have the following code in the class of my project.
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
[code]....
So, now I've exactly used this code to load an image from a path specified. Still, i seem to get a blank form when i run. im quite sure about the path and the existence of the file. Also, the exact piece of code is also available at: Draw an image : Draw Image2D GraphicsVB.Net Tutorial So, now do i have to insert a picture box to se the loaded image. Its like.. ive used the graphics thing to draw the image. so i reckoned that picture box was unnecessary.
Is it possible to load an image into a picturebox when that picture box is clicked? What would the syntax look like? It's an image that I already dropped onto the form that I would like to load into that picturebox.
View 1 RepliesFirst problem im having is that My image gets grabbed from the website but then it doesnt automatically load i have to click the PictureBox[code]...
View 5 RepliesI cannot seem to get my image resources to load into PictureBox1.I can see all the images I added as resources in the solution explorer.They are a series of PNG files with names associated with countries.I am at the beginning stages of randomly changing the image that is displayed in PictureBox1, but I cannot even get the first image to load.Here is my code so far. When I click on Button2 I can see that my array returns a random country, but no image loads.I even tried typing in several of the countries names as well as the country name followed by png (e.g. chine.png) and again no image loads.
Public Class Form1
Dim randomObject As New Random()
Dim Flags() As String = {"australia", "brazil", "china", "italy", "russia", "south africa", "spain"}[code]......
I have this url as an example: [URL] As one can see, it returns a nice picture--just what I need. Now, I need to put that "picture" inside a picture box or perhaps save it to a file. I would prefer the first as I believe it would be faster. Note the picture comes to us in a .gif format. I use vb 2005.
View 4 RepliesAlright, so I'm still working on my slot machine, and I have it all done, for the most part, just got a quick question. I don't know how to set an image in an imagebox. Here is my lame attempt. I've been pulling my hair out and searching google for about an hour now
[Code]...
I'm new in the vb.net world. The question I have is how to display an image which is in a access data base in a picturebox in visual basic(2010).
View 7 RepliesI want to make a program similar to this one: [URL]. I already have the ListBox ready. But how do I load the images?
The image name works like this:
-File1.package
-File1A.jpg
-File1B.jpg
So the .package is removed and A.jpg or B.jpg is added.
I have a code wherein datagridview will load according to the query given.I have no problem with that but when i put a loading image while reading the database, loading image wont work as well as if i put only "Please Wait" to a label.I searched from google and said that backgroundworker sahould use to this problem. But how can i use the backgroundworker?i have no idea about it.
View 5 RepliesI am trying to get a picture box (that has a loading image .gif) to be visible while the program reads a text file and change visible to false when all the information in the file.txt is displayed in the textbox.
Here is my
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
PictureBox1.Visible = True
If System.IO.File.Exists("C: est.txt") = True Then
Dim objreader As New System.IO.StreamReader("C: est.txt")
[Code] .....
Making an icon out of an image
View 3 RepliesI have been practicing, and have created an extremely simple image converter.I want to include some vector formats. The formats that I want to include, but aren't in System.Drawing.Imaging.ImageFormat
are
.ai
.cdr
.dxf
[code]....
How would I go about writing the code, to where they would work? Is there a way to make them recognized?
how to Load Image in Crystal report Dynamically?Im creating students id in crystal report.the image is accessible through path "C:mysoftwarepicturesstudent001.jpg"
View 3 RepliesI currently have 4 images that I need to load into a picture box at different times, it works fine for me but if I send it to a friend it wont work because the file path is different. I use this at the moment:
If filmType = "Jumper" Then
img = "E:TheatreBookinginimages"
picFilms.Load(img)
lblFilmInfo.Text = ("A genetic anomaly allows a young man to teleport himself anywhere.")
lblFilmInfoTwo.Text = ("This gift leads him into a war that has existed for centuries.")
End If
I have a picture box on my form along with a combo box with a number of different options. So anyway when a combo box item is selected I want it to look in the dataset for the selected item's row and pick out the image to load and then using an IF statement it sets the image (or should).
Dim RaceImg As String = DS.Tables("tblRaces").Rows(ID).Item("RaceImg")
If RaceImg = "AusGP" Then
GP_Picture.Image = Image.FromFile("./Track Images/AusGP.png")
ElseIf RaceImg = "MalGP" Then
GP_Picture.Image = Image.FromFile("./Track Images/MalGP.png")
End If
I have tried a number of different ways to get this working, I have tried them in the resources for the program and also tried the following code
GP_Picture.Image = "./Track Images/AusGP.png"
It seems like the picture box isn't redrawing or something? Just to add it will load the first image which is the AusGP because thats the first option in the combo box, after that none of the others will load.
My program requires that a picturebox change its image during run time. I've used:
PictureBox1.ImageLocation = [file location]
PictureBox1.Image = Image.FileFrom([file location])
Both work fine, usually.
[code].....
I'm sure there are similar threads, but I've search and tried most things and still can't find something that works.
I am testing a small project, in the attempt to find the solution for a much bigger application. So, here's the deal. I'm using VB 2005 and MSSQL 2005 (both are Express editions). I've stored the names to some images in the database.
When I use PictureBox1.image = My.Resources.<filename>
and build the application, it works and properly displays the image. Now, what I'm really trying to do is extract an image names from the database and assign it to a variable, this is what I have.
Dim EqTest As New Test1DataSet.EqTestDataTable
Dim EqTestAdapter As New Test1DataSetTableAdapters.EqTestTableAdapter
EqTestAdapter.Fill(EqTest)
[Code]....
I've used the messagebox for testing so that I can see what the value of "Trythis" is, and the string is "My.Resources.<filename>", which is the correct string, but I can't use that string in the picturebox to display the image, because I get an error "Value of Type String can not be converted to System.Drawing.Image".
Basically I am playing around in vb and trying to build a simple photo app. Here is an example of the problem I am facing. I have 3 pictureboxes. The first one is an image of an album the second picturebox shows a thumbnail image of picturebox1 when it is clicked and then the final picturebox shows a blown up image of picturebox2 which is the thumbnail. I can do all this fine when just using the first set of images. The problem that I am facing is that when I run the program and lets say I clicked on picturebox2 which is a thumbnail image it shows it in picturebox3 before picturebox1 is even clicked. I am trying to do this by adding tags to each separate image but have failed miserably.
View 1 Replies
