Resizing Image Before Uploading To Local Storage
Jan 6, 2012
I want to resize the resolution of an image before uploading it to local storage. Right now it saves the image in its full resolution and I have to manually resize it using width="200" height="200" or a css tag in aspx. I want to reduce the file size of an image before storing it, hence by resizing the image resolution when the user uploads it via button. I've tried using System.Drawing before and setting the int imageHeight and int maxWidth to be resized but couldn't seem to get it to work.
My code so far is:
Protected Sub btn_SavePic_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn_SavePic.Click
Dim newFileName As String
Dim SqlString As String
[Code] .....
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Aug 3, 2010
I recently changed a For Each loop to a Parallel.ForEach loop. I'm concerned about an object being declared outside the loop but assigned while iterating in the loop. Here is the simplified code.
Dim results As ModelResults
Dim noResultsModel As New List(Of ModelResults)
Dim lock As New Object
Parallel.ForEach(_modelEngines,
Sub(model)
[Code]...
Is there a potential race condition with the results object? Would anything be different if I moved the declaration of results into the for loop?
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Mar 22, 2009
I need a simple method for a user to enter as many rows of data as they wish (probably won't exceed 50 in most cases and that's pushing it) and then store that data for retrieving the next time they want to reuse that list. I will also need to read the rows in for manipulating text in a file with those entries.
Would the best method to be to use the DataSet in VB Express 2008 and then use the DataGridView for allowing the display and entry of the data?
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Nov 10, 2011
I've been reading a lot of articles here and there, really, for the past two days, searching for a good local storage system. I have no immediate use for now, so I am just exploring my choices. By saying 'local storage system,' I'm talking about some sort of database used for applications that let users manage and organize personal accounts (bank accounts, web site accounts, application licenses...). I do use XML to store user settings. But if you have to manage lots of information locally, XML won't probably be good enough, I'm afraid.
So what are choices Visua Basic users? Well, as I often mention, I develop Mac software products. And I use SQLite. In fact, every one of some 40 apps sold at Mac App Store uses SQLite for good reasons. I know that you can use SQLite with Visual Studio after installing a package from sqlite.phxsoftware.com. But I don't know if your application can reproduce a database file when necessary. That being said, I'm looking for a system that I can use to create a file programmatically especially when the user launches it for the first time. So what do you use to locally manage large information? SQL Express? SQLite? XML?
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Jun 19, 2009
My idea is to add a entry to the windows context menu "Host File"
Then it will upload it to tinypic.
I assume it would have to be done using httpwebrequest?
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Mar 11, 2010
I have always used the API for Vb.net from Decaptcher.com and have always sent the Captcha by sending an actual url to them as you see in the code below. Or maybe it uploaded the image anyway to them (I use the Webbrowser Control) [code] But with the current project that I am working on right now I am having to take a screen shot of the captcha image, then save it to my harddrive.I know that through your API Decaptcher allows us to upload the image from our harddrive but I just can't figure out how to use the code to do this. I have tried this but it doesn't work: [code]
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Apr 25, 2012
Is there a way by using ASPxUploadControl to have an image get uploaded automatically when you click the ok button after browsing and then get shown a preview of said image but only upload the image to the server officially after you click an ok button? I found [URL] which looks like it does the automatic upload but thats about all I've found so far.
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Jun 12, 2011
For a project from skool, I been in charge of development, and we already have the system, but they wanted to add images to the project, and since i been using the TableAdapter.Insert commando to add records to the database, I need to know how to send an Image with that command.
Here is my code
EmpTableAdapter.Insert(noemp.Text, nametb.Text, area.Text, DateTimePicker1.Text, "", "Active", "", HERE GOES THE IMAGE )
[code].....
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Nov 7, 2011
i am trying to upload an image and saving image name in database as the session name with extension .jpgi got problem that only the image name saved in database not the extension. i am using this code
Dim strPath As String = Server.MapPath("~/UserPics/")
If AsyncFileUpload1.HasFile Then
AsyncFileUpload1.SaveAs(strPath & Session("UserName").ToString() & ".jpg")
[code].....
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Dec 8, 2011
I have the following code in my IHttpHandler:
Dim MemoryStream1 As New System.IO.MemoryStream
MemoryStream1.Write(SqlDataReader1("cover"), 0, SqlDataReader1("cover").Length - 1)
Dim Bitmap1 As System.Drawing.Bitmap = System.Drawing.Bitmap.FromStream(MemoryStream1)
Dim Width1 As Integer = Bitmap1.Width
Dim Height1 As Integer = Bitmap1.Height
[Code]...
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Jul 23, 2010
I want to be able to kinda like have a timer that will get an image off my Hard Drive, and upload it online, so that all I'd have to do is download the image, even if it's been written over, I want to be able to broadcast an image from my hard drive, using only my IP Address.
127.0.0.1 is my IP Address.8888 is the port.Somthing like if you were to goto http://127.0.0.1:8888/update.html or Update.Jpg If YOU were to go to this address on your machine, you could see the image... Of coarse, it will probably be an image of which I was able to get from Printing my Screen image, and then saving it as like C:Test.Jpg, but the Timer would get my Desktop Image, or Print My Screen and Save it and Overwrite the Test.jpg image on the C Drive... Ya know what I'm talking about?
[Code]...
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Feb 1, 2012
I have got one problem by uploading file. I created an aspx file in asp.net then I added a fileupload control and image control. I want to show preview image in image control before uploading. I created a following script.
[code]...
It is not work in every browser. How could I do that?
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Jan 27, 2010
Here is the code I used. everything works fine, but i need a little different code to upload image.
Private Sub btnAttach_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles btnAttach.Click
Dim iLength As Integer = CType(File1.PostedFile.InputStream.Length, Integer)
If iLength = 0 Then Exit Sub 'not a valid file
Dim sContentType As String = File1.PostedFile.ContentType
[Code] .....
I am not using with cmdinsertattachment. I am using Html - Input(File) from the HTML toolbox. the ID of the input file is ID="upldimg". So how do I insert this into my table which is -
Column1 ID identity
Column2 Img image
Column 3 Description varchar(200).
The insert statement like -
INSERT into table1 (Img, Description) values (???, txtdescription.text)
Do I do upldimg.text in the insert statement?
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Apr 19, 2010
i am trying to figure out how to go about my two problems i am currently having when trying to display a resized picture into a picturebox on my form.What does it need to be in order to grab the image thats already been cropped in the pbCrop picturebox? I have the cropped image in the pbCrop picturebox and i then am trying to resize it.I need someway of taking the newly resized image and placing it back into the pbCrop picturebox, indicated by the "'code to draw it into the pbCrop picturebox" code below: NOTE (Ly = 60)[code]
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Sep 15, 2010
I have a Picturebox and a two Buttons on my Form. On click of one of the buttons I want to change the image in the picture box at runtime.
This works fine when I give the location of the image (the full path ) on my computer - but then of course it will not work if I use the solution on a different computer .
So I have made a folder named "Pics" inside my application and added two images into it.
How do I get to this local folder in the following code?
Picturebox1.image = system.drawing.image.fromfile (??? )
instead of the usual,
Picturebox1.image = system.drawing.image.fromfile ("C:UsersMyName My PicturesMyPicture.jpg" )
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Apr 19, 2012
I'm writing it again, i'm developing an app in which user click a picture through image and image will be stored in sdcard then I have choose the picture from image view and send that picture to the server. I have convert my image into the byte array and then encoded it in Base64 string format but when i try to send that image to the server it give me an error of soap fault. Here's the my code of android device:
public void doneImage(){
ByteArrayOutputStream out = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.JPEG, 100, out);
[code].....
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Jan 27, 2010
this is the code i used from this site. everything works fine, but i need a little different code to upload image-here's the code -
Private Sub btnAttach_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles btnAttach.Click
Dim iLength As Integer = CType(File1.PostedFile.InputStream.Length, Integer)
[code]....
i dont have these parameters. i only have 1 field in sql server table that says Img and has image datatype. how do i use this code to get my image in db using this insert statement?insert into table1 (img) values (???)
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Sep 18, 2008
I am interested in uploading an image to a file field using httpwebrequest or similar however I am stuck on a few things. Would it be a matter of add the file field and the image I would like to upload as the value? I'm not looking for code, I would like to learn how this can be accomplished.
[Code]...
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Feb 15, 2012
How do I add constraints to image resizing code? I want the image to be no larger then 165x146. The below code does not hold the constraint when image is 525x610.[code]
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Sep 26, 2011
I am trying to print an image (from file) to a the printer using a PrintDocument.I am re-sizing my image so that it is scaled to be full page on the printout when I print this the image is cropped slightly.
EDIT 2:I am using the margins to calculate the area to use:
With printSettings.DefaultPageSettings
Dim areaWidth As Single = .Bounds.Width - .Margins.Left - .Margins.Right
Dim areaHeight As Single = .Bounds.Height - .Margins.Top - .Margins.Bottom
End With
The bounds of the page are 1169x827 (A4) and with the margins it is 1137x795.After resize my image size is 1092x682 and I am using the following code to draw it:
e.Graphics.DrawImage(printBitmap, .Margins.Left, .Margins.Top)
The annoying thing is that when I print to the PrintPreviewDialog it is scaled perfectly but when I print the exact same code to the actual printer it does not fit.
EDIT 3:Full code can be found at this url Usage:
Dim clsPrint As New clsPrinting
With clsPrint
.Landscape = True
[code]....
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Nov 19, 2010
1. Image Resizing: The code takes the screen when you press the button and then save the image. My question is, how can I set the image size before saving?[code]
2. Location (in the center):Almost all computer have different resolution from another computer. My question is how do I find the center of the screen and is where the program (when they open the program and see it in the middle of the screen)
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May 24, 2010
Imagine I have a rectangle say 400px x 300px. All of this is very easy using Sytem.Drawing. DrawImage. But then I want to leave the left hand side as 300px but change the right hand side to 250 px. I can draw the box using 4 DrawLines but I don't know how to squash the image into the new shape. I want the right hand side of the shape to be 250, the left size 300 and the top and bottom 400px.I can't use DrawImage as it expects the left and right sizes to be the same. Is there a way to manipulate the image into the new shape?I've looked at other questions, but they only apply where the left and right hand side is equal.Any thoughts on how to squash an image into a shape which did not have parallel sides?
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Sep 1, 2010
I want to use the http:[url....API function to upload a picture onto ImageShack and then obtain the image_link. The only problem is, how do you place an image with its file name with the form-data along with the API key? This is what is stumping me in trying to implement the function.By the way, OpenDialog is already implemented to select the file to upload.
Update: I tried adapting the existing code to use the Unified API and it still does not work. If anyone knows what's wrong in the code, just make the modifications... Otherwise,
Imports System.Xml
Imports System.Xml.Serialization
Imports System.Xml.XPath[code]......
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Dec 12, 2009
I'm uploading an image to url... etc. The trouble is my application stops responding for 5-10 seconds while the image is uploading. I want to use multi-threading to stop it doing that but I'm confused with the whole way to use controls with backgroundworker. [code] I guess its the textbox which is causing the problem.
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Jul 25, 2011
i was searching google for some kind solution and i found one, i tried to implement it in my code but it doesn't work. The problem is that after resizing white images they gets gray border.Here is the link of soloution i found:It says:
This problem is occuring because you are interpolating your image data to a new size, but along the edges there are no pixels to interpolate and .NET uses black pixels for these edges by default. To fix this you need to use an ImageAttributes class in your DrawImage call....
https:[url].....
CODE 1: And this is my code WITH IMPLEMENTATION OF ImageAttributes:
Private Shared Function ResizeImageFile(ByVal imageFile As Byte(), ByVal targetSize As Integer) As Byte()
Using oldImage As System.Drawing.Image = System.Drawing.Image.FromStream(New MemoryStream(imageFile))
Dim newSize As Size = CalculateDimensions(oldImage.Size, targetSize)[code].......
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Nov 12, 2011
I'm trying to change the size of the image in a picturebox, without resizing the picturebox?
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Dec 27, 2008
Code that opens image file this code works properly
Private Sub MenuItem4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FromFile.Click
PBDisplay.Visible = False
If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
PBDisplay.SizeMode = PictureBoxSizeMode.AutoSize
[Code] ......
This code is what I am using to save image after it is re sized, It will not save the new image, it saves the old image and the old size. I am using a picture box to import the image into, then I am resizing the picture box and the image. But when it is saved it reverts to the original image.
Private Sub MenuItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Save.Click
If SaveFileDialog1.ShowDialog = DialogResult.OK Then
PBDisplay.Image.Save(SaveFileDialog1.FileName)
End If
End Sub
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Sep 1, 2011
Ok, it seems my question might not have been straightforward, so here is a more generic question.On a form in a picturebox if I have a 32 x 32 picture. How can I scale it to be 64 x 64.I am not refering to stretching the image or resizing the picturebox. I mean using the ScaleTransform method of the graphics class. How can I do this without deforming the image?
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Jul 16, 2010
I don't have code because I don't know if its possible. I need to make a webbrowser for work that will auto rezie images like internet explore does when it is to big for the browswer, I have done it with vb6 b4 by parsing it into ram and then displaying the image, but I don't know how to do it in vb.net cause the code will not convert. Also I need to have vb.net auto send user name and password to the website its navigating to. The website uses a standard username and prompt window that pops up once you navigate to the web address.
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Jan 17, 2012
I am trying to do a code for my application that will crop a selected images into oval shape.
I tried to search for a reference on the internet there is only example on how to resize it. But is it possible to crop it into shapes?
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