Use GDI+ To Render Images Is Slow
Jan 14, 2012
I currently use GDI+ to render my images but is too slow for what my software is supposed to do. I tried to use DirectX but it too hard to implement. Is there any library that is best of bought worlds? Fast and easy to use?
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Aug 12, 2011
I have a web browser integrated into a project. the web site uses jquery and runs best with ie9. The WebBrowser control in my vb.net form runs the web page as ie6 and none of the jquery works. Is there a way to tell the control to render with ie9?
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Jun 20, 2012
I'm trying to render a custom section within a form in VB.NET MVC3? the section is in the master layout, and is defaulted - but id like to create a custom one when in a particular view
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Apr 23, 2010
We have a report that has to be called from an ASP.NET application, it could be a simple button. Through the code-behind, I gotta pass in a paramater, render the report, and don't save it anywhere, just open it to the user, as a .pdf file so he could save or print it.
EDIT:Now I've got the report done, I just need to know the best aproach to call it.It can't be done directly from an URL because that allows the user to save or close the pdf file, which is not what I want.
I'm starting to think that the best aproach to achieve this would be the following:I render the PDF programatically, and create the .PDF file in a temporary folder inside my app structure, then start a new thread to open the file, and wait for the user to close it, when he does, I delete the file and the thread is dead.
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Aug 30, 2011
I want to render a report directly to pdf. I have an objectdatasource with 2 parameters. I obtain these parameters from a hiddenfield on the webform and from the datakeyname on a gridview. The report works when I load it in report viewer without rendering to pdf. When I place the code to render the report as pdf the parameters dont load i.e. the report renders as pdf but there are no details on the report. My code is below,. I placed the code in gridview_selectedindexchanged:
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Oct 9, 2010
I render a complex shape in OpenGL which requires a lot of calculations, is there anyway to export that to a state like a model that can be opened again later given you wont edit it again?
I can't create them outside the program (with something like Blender) since the shape is computed when the program starts. The render then gets translated, rotated, drawn over, etc. Note, that I don't need to edit the shape though, but I do want it in a 3D state so saving an image isn't an option.
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Nov 25, 2011
I'm trying to make a toolstrip similar to that of Internet Explorer (as shown below). Does anyone know how to create a custom renderer to do this?
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Nov 12, 2011
Dim formTest1 As FormTest = New FormTest()
formTest1.Show()
Dim htmlDocument As mshtml.IHTMLDocument2 = DirectCast(WebBrowser1.Document.DomDocument, mshtml.IHTMLDocument2)
If htmlDocument IsNot Nothing Then
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I want to copy the contents of a WebBrowser to a Bitmap. The above code seems to reproduce a part of the image but not all of it.
1) I'm sure I don't understand this completely so my comments probably have terminology that is not completely correct. I would really appreciate it if you could edit them and maybe add a little to them.
2) And, of course I'd like to know how to improve the code.
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Feb 4, 2012
I have a project with a canvas that the user can zoom and pan using the mouse. The origin is marked with a blue cross running through the canvas. As the user zooms in the line width of the markers is reduced to keep the them about 1 pixel wide on screen. However, after zooming in about 10x the origin lines abruptly disappear. It seems like the rendering engine is deciding that the line is too small to be displayed before applying the scaling transform.
What is strange is that when I do the same operation to a rectangle instead of a line I get the expected behavior (see the ScaleBox rectangle object in the code below). Any ideas on what is causing the problem and how to fix it would be welcome.
Here is the relevant XAML:
<Canvas x:Name="MouseCapture" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="WhiteSmoke" >
<Canvas x:Name="ZoomPan">
<Canvas.RenderTransform >
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Here is a screenshot as 10x Zoom. The origin lines have disappeared abruptly, but the black box still shows up as expected. (Note that only one side of the black box is visible because the rest is outside the visible region because of the zoom.)
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Apr 5, 2011
I'm working on a website that creates pdfs dynamically.I've been playing around with two different pdf controls- wpcubed and abcpdf, and was surprised to see that they both appear to render text differently.
wpCubed:
abcpdf:
They are both using arial 25pt bold, so I was expecting them to look identical. Can anyone explain why they don't. Here are the full files: wpCubed , abcpdf
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Oct 11, 2011
rticularly when creating jQuery buttons with no text and just icons) as a result of this.Secondly I am attempting to create my own custom button output by overriding the Render() event and am having a bit of difficulty trying to understand how to go about changing the output that is provided by this event.If I look at the HtmlTextWriter that is provided as the parameter to the Render() event I can see it contains a protected property TagKey = Input {47}, is it possible to simply modify this property somehow and change it to a Button or do I need to create a new instance of the HtmlTextWriter and populate it all from the start? If so, could anyone provide some guidance as to how this would typically be done and if there are any special considerations I need to make to ensure that my derived button class is functionally equivalent to the original (excluding the html)?
<Assembly: TagPrefix("MyCompany", "MyCustomButton")>
Public Class MyButton
Inherits Button
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Feb 14, 2012
I just can't get it to work. I have an array of bytes, read from a png file. I'm trying to write a (very) simple HttpHandler to render the image:
context.Response.AddHeader("Content-Type", "image/png")
context.Response.BinaryWrite(bytes)
context.Response.End()
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Feb 15, 2009
I'm filling a DtatagridView as usual, using a datatable as datasource and I have the SelectionMode = FullRowSelect, but since I need to color each row according to its result, I have set the property DefaultCellStyle - SelectionBackColor = Transparent, well, I'm not going to complaint about the font looks a little bit distorted, but about the selectedrow does not render correctly, If I minimize the program and then maximize it, the selectedrow appears with the image of the desktop's background.
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Jul 12, 2010
I am using directwrite and was just wondering how to render a font (font face file) that is loaded in the project resource (probably through a stream).
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Feb 11, 2010
I have a asp:DropDownList with a CascadingDropDown being populated by a webservice.The data the webservice provides contains HTML code eg. <sup>2</sup> which needs to be displayed as a superscript Unfortunately, the HtmlEncode="False" doesn't seem to work (if i set it to true, doesn't work either) - primarily because it isn't a valid property for the dropdownlist How do I do this?
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Apr 6, 2012
I am having an asp.net page which i was showing as a pop up using Nyromodel. the page contains
4 div which is showing as Tabs (using Jquery Tabs). 4 Repeater . Each repeater I am having a custom control and I am setting the value from db by setting the datasource to repeater. (This query may have 300-500 rows). 1 infragistics UltraWebGrid. I add selected values to the grid.
So the problem is it is taking too much time to render if I perform any operation in that UI. I logged the sp execution time, then I found that SP i taking only 2-3 seconds. But the control will render completely after 30-40 seconds. So sp execution time alone is not enough to satisfy the my lead. how to analysis the time of rendering the control.
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Dec 5, 2011
So here is the situation. I am originally a PHP developer, here are my steps to render data:
PHP gather data from DataBase
PHP write data to JavaScript
JavaScript render using JQuery to HTML
HTML display to user
User Postback to PHP
PHP write back to Database with new data
Now I am using VB.NET and I need to use their paradigm with controls and what not. However I would like to render using JQuery and JavaScript. How do I get data into JavaScript when loaded in VB and get it back once user post?
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May 14, 2012
I am trying to render a hyperlink in an email template which will be sent to the user and if the user clicks on that link it will direct to a unique url. I have given the coding below:
email.AddMailmerge("RequestUrl", "<a href=" & ConfigurationManager.AppSettings("DomainName") & "/Requests/Requests.aspx?Company_ID=" & objCompany.IDHashed & ">Feedback Requests</a>")
My problem is the link doesnt resolve correctly and take me to the right url. It resolves as:
C:UsersTestDesktoplocalhost/Requests/Requests.aspx?Company_ID=KirprZ17bg5u5Qf1
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Jul 27, 2011
I'm trying to, for example: Have a button control, and a picturebox(?) control. I need to figure out a way to make the Picturebox image the current snapshot of the Button. Is this possible? Should I be using WPF or something?
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Jul 11, 2009
I have a set of files of various format like pdf,txt,tiff,jpg.I need to render it within the form and highlight the certain keywords.Initially i tried to convert all files to pdf and then render it( using itext for vb.net).Now my colleague advised me to render them as html or images, saying it might make the process easier.
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Jun 4, 2011
The idea is to scan a folder of images and then let the user navigate back and forth through the images using a couple of buttons.The problem is, I can only get it to return a single image, and not the whole lot. It's looks to me as though the images are getting assigned to the same index in the array. [code]
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Oct 3, 2010
What type of connector do i need to actually save the Map data like point of the images (x,y coordinate) into the database . and then retrieve it to show on the page in asp.net and how do i go about doing it.
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Feb 11, 2009
The app i am working on is for creating theme for the iPod touch... It has to deal with LOTS of images (100's potentially) There will be the set of default images, and then the user created replacement images. I started loading all the defaults into a resx file... thinking then I could just pull them out. now that I started setting the default, this sucks! lol the app will do this, on load it will set all the images (variables) to the resx images then when a theme is loaded, it will replace the default with the user image (if the user img exists) otherwise, the default stays. Then the "screen" is drawn to show the user. so, here is just the images to build the wallpaper, dock, and status bar...
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Aug 12, 2010
I was thinking to make an app to save images [or download images] to local hard disk. But to keep it easy, I want this app to create a small picturebox on form to show the thumbnail of downloaded image. Lets say a 5 pictureboxes has to be added with the thumbnails to show the recent downloads. A user can save the location where he wants to save the files on hard disk. A listbox or a dropdown menu will help in categorizing the images, like image1 in friends section, image2 in family section, image3 in others, etc... When the program restarts all the latest 5 thumbnails has to be loaded in pictureboxes and the directory that was chosen. Finally, a button that shows the downloaded images into original image file size one by one or a slide show. Is it possible to make such program?
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Sep 20, 2011
I am developing a visual basic 2008 express edtion program of an organisation that should get images from the system and display on image/picture box. further the program should save the displayed image in access database so that it can be retrieved together when you want to search the information about that particular employee.
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Jul 7, 2010
I am trying to render a hyperlink to html. ( etc)
When the page loads it works fine. (and lots 10 links) on the update panel it hits the same function and tries to get another 10 links. I set the navigationURL to something like
"../Folder/Mypage.aspx?498592ghjgfosdfgo"
It is set identically both times(load and updatepanel postback) but when i try to render it to html the second time (on the update panel) it adds "../" to the front so i end up with
"../../Folder/Mypage.aspx?498592ghjgfosdfgo"
The function where it changes here
Public Shared Function RenderControl(ByVal c As Control) As String
Dim sw As New IO.StringWriter
Dim htmlw As New HtmlTextWriter(sw)
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Mar 14, 2012
I have a strange issue when binding a combobox in a WPF window.I am loading a List object, to populate the combobox, through it's .ItemsSource, on Window Load, however, it does not populate.At least, not until the arrow is clicked on. Once the arrow is clicked on, the window freezes up, and after a minute or so, the 4000+ records are displayed in it.Now, the list gets loaded, however, when I click on the combobox it takes awhile for it to render, so how can I show a waitcursor while it is rendering the list?Here's the Xaml for it:
<ComboBox Grid.Column="1"
HorizontalAlignment="Stretch" Margin="3" Name="tUser" VerticalAlignment="Stretch"
DisplayMemberPath="UsersName" SelectedValuePath="UserID" SelectedValue="0"/>
And the code-behind is:
Private Sub CreateTask_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles Me.Loaded
Using New WaitCursor
_LA.Show()
Me.tOrder.ItemsSource = GetOrderList()
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Aug 29, 2009
I'm working on a simple image tagging and searching app. I've got my images uploading to the DB, the tags being applied, but am failing when I pull them back - the images don't render. I found this here on SO, but I'm not able to get it working.
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Jul 28, 2011
I have this issue where I'm trying to generate HTML to display on the page that is coming from the database in form of a template that has different curly brackets that get replaced with dynamic content at run time. For example curly bracket {Content} gets replaced with a few checkboxlists, radiobuttonlists, textboxes and a submit button. The way I'm doing this is by creating controls dynamically and rendering them as string and then outputting that string to the browser. But what this does is, it doesn't recognise the events assigned to the controls when they are generated. I may be taking a wrong approach to the issue, but I don't really see how else this can be achieved. I have put up some sample code below to show what I'm trying to achieve.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
[Code]....
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Aug 10, 2006
This problem is with the WebBrowser component. The code posted below is what I am trying to insert into the control before it renders the page for the first time. This question actually stems from this post: [URL]. I am developing the application in C#, however the problem is not really language specific.
When I have a page that has a javascript call to:
window.print()
I am wanting to override the print method so that pages do not pop up the print dialog. I can do so by inserting this into the top of the html:
window.print=function emptyMethod() {};
I now just need to figure out how to get this code into the document html before the browser control renders it for the first time. I have tried a number of things (for a complete list, see the post listed above), all with no success.
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