VS 2010 Thumbnail Auto-Preview On WinForm
Jan 10, 2012
Can anyone provide some details on a way to have a thumbnail image of a random file appear in a panel on a form? I'm working on a project that requires this functionality when a user clicks on a item in a checkedlistbox. This way users can auto-preview a file. All code that I found applies to actual image files, so I'm getting "Parameter is not valid" errors when attempting to create a bitmap thumbnail of a text file. Would a printpreview control work? [code]
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Nov 14, 2011
I am trying to get this code to re-size(by a percent) the pdf thumbnail it outputs(which needs to be initially scaled down to 15% of the size of the original pdf document size).Currently, the code only adds the two dimensions as pixels, then renders the image, and draws it into a PictureBox.The code uses Ghostscript as you can see. The problem I am having is getting the dimensions of the PDF file. How can this be done? The code will be posted below:
Imports System.IO
Imports System.Drawing.Imaging
Imports GhostscriptSharp
[code]....
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Jun 30, 2009
The preview on my program doesn't show how I would like it to, sometimes it's blank or not big enough for the whole screen, and other things.
I have 3 forms, one is of controls, one is a full transparent form that is just the outside edges with a blank middle, and one of is the background. Reason for this is setting background transparency, and the transparency(opacity) of the top bar of the form, so it will be transparent like vista is normally in xp.
I want it to show always the full form live view on the preview and I am not getting it to work with my 3 form as one form type program, but it works as expected with one form only, but I don't want this because I want individually set transparencies.
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Mar 11, 2011
Im looking to embed an .exe into my form. An example of what I want to do is the preview area when selecting a screensaver in Windows. It shows a small running preview of the app in the current window. How do I do that in my VB form?
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Mar 8, 2009
I've got this code to thumbnail images
Try
' set delegate
Dim currentCallback As Image.GetThumbnailImageAbort = New Image.GetThumbnailImageAbort(AddressOf ThumbnailCallback)
' get the current image
[code]....
is there a way to do a similar thing for word documents(or any text)? I just want to have a thumbnail of the first page.
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Aug 25, 2010
I try to create a dual video player with VB 2010.
With that I have 2 forms, 1 main form (with all the controls and it should contain a preview screen of what is being displayed on the second form.
And a second form (with a windows media player component).
Now the main form should have (as told) a preview screen of what is shown on the second screen, I want to know if it is possible to have is as the windows 7 taskbar thumbnail (when preview the mediaplayer).
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Feb 13, 2012
i created this thumbnail with other programming mothod Test Thumbnail.rar but how can i register it in other windows i tried register it with RegAsm but i don't could register it
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Mar 11, 2010
I need to make a form like this [URL] [URL]
For Firstname and Lastname: When you click to random Button it will auto pick random Firstname from Firstname.txt and random Lastname from Lastname.txt
For Username: when you click to random Username Button it will auto generate Username from firstname, lastname, string, number like this
Username = firstname+number+lastname+string
For Password:
Password = random string + random number
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Oct 1, 2011
We are doing a project using VB2010 as front end SQL server 2008R2 as backend.We need the code to display all the images in thumbnail view in VB when we open a database table.
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Jun 10, 2011
I can't get this to work. My program fills all the values into an Excel spreadsheet- no problems there. What I'd like to do is a print preview/print function. I can't seem to get my code right, all I get are blank pages in the print preview box.
Dim oExcel As Object = CreateObject("Excel.Application")
oExcel.Workbooks.Open("C:DailyLogsDailyLog.xlsx")
PrintPreviewDialog1.Document = PrintDocument1
PrintPreviewDialog1.ShowDialog()
oExcel.Sheet1.PrintPreview()
So as I see it, this should open excel, then navigate to the actual excel file. The print preview dialog should come up, which it does, and the excel sheet1 should be previewing, but it's not? I don't have any errors, just a blank print preview. At least thats how I see it, but obviously I'm wrong because it won't work.
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Jul 11, 2011
I have an application which has multiple files .rtf I open it on a rich text box.
Here is my code for print preview
PrintPreviewDialog1.Document = PrintDocument1
PrintPreviewDialog1.ShowDialog()
I press the button for preview and it shows me the preview. But if I change the content of the rich text box with another file, the print preview shows me empty. How I can send it to a new preview?
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Mar 6, 2012
Is it possible to preview an excel file in the printpreview control? if yes, please give me some guidelines.
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Sep 16, 2011
how to make the preview scroll (smoothly) with the mousewheel?
Private Sub print_preview_MouseWheel(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles print_preview.MouseWheel
If e.Delta............???
End Sub
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May 10, 2012
Is it possible to see the page setup during print preview of crystal reports during run time?
Because there are times that we need to set the top and bottom margin of the report.
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Nov 17, 2011
On the left half of my screen I have a datagridview. On the right half I have a document preview pane.As I change rows on the left half, I use the CurrentCellChanged event to open the document associated to that row in the previewer.This works fine, however, the focus is then placed in the preview pane which prevents the user from being able to use the arrow keys to step down a row at a time.To combat this, I made the final event in my CurrentCellChanged routine set the focus back to my datagridview. Unfortunately, even this doesn't always work because of what seems to be a timing issue.If the document to be previewed takes more than a fraction of a second to open, the code to move the focus to the datagridview is executed but after the image completes drawing, the focus is moved back to my previewer.I don't want to use a timer to force a delay and a DoEvents causes me some other issues.Is there some other event I can use to determine when my preview pane is complete and then and only then set the focus back to my datagrid?
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Feb 26, 2011
I recently download/Installed Crystal Report for Visual Studio 2010 to work with Visual Studio 2010 Prof. Database from SQL Sever 2008 Express. Now my problem is when I run Crystal Report Viewer - Windows form : 1st message Database Login request and otherwise WRONG RECORDS DISPLAYING which I have not in my database table.
do print reports for my new Windows Application.
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Apr 18, 2011
Is there any method to do batch update winForm in VB 2010
Using Microsoft Access2007 as database, VB 2010 WinForm (DataGridview + Textbox)
There are a lot of record need to be Updated, It is very efficient if that data is just going through Batch Update, meaning just one click will update all the data rather than click one by one.
Any Demo or code showing how to do this Batch Update (VB.net).
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Mar 11, 2010
i want to take print preview of window form and after taking print preview want to take print of form
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Dec 14, 2011
My instructor told us how to print documents and how to use databases. What the instructor did not mention is how to print or print a preview of records within a DatabaseDataSet. The book "Programming in Visual Basic 2010" does not explain how to print or do a print preview of Database Source records from within a form. The only thing I was told was to test the print document first before you try to do a print preview. Within a form I used a DataGridView to add, delete, and update the database. So now all I need to do is figure out how to print the updated records from the DataGridView and how to print a preview of the records within the DataGridView. So I hope my question is clear enough to give me assistance on how I can perform these two actions. Thanks this would be a great help, and since the class is online we can get assistance from any sources that we have.
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Dec 9, 2010
Basically, I am looking for a method on how to preview reports from a datagrid or it can be from the access database which populates the data to the datagrid (then displays this in the datagridview) in vb.net vs 2010.I believe there are two methods using the ReportViewer or using Crystal Reports, but so far, I have no idea how to get them to work. The first idea would be favourable - using the data from a datagridview (which may of already been sorted, filter etc) and be able to produce a report on that.
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Jul 7, 2010
A Form is to Accept User Name and Password from user, after verification the form should display another form that will accept user's full data. When a user press the Ok button, the information entered on this form should be display in another form (Showing the user what he/she has entered)
i have Design the Firs Form and the second form, how can i pass the information entered on the second form to third, and also what will the code look like I need help on this or Code Sample?
NB: i am trying create an instance of the second form in the third form and declare a variable in the third form that will holed the value, but still not working I want to learn .NET Programming in VC#, ASP.NET And VB.NET. I am student and really get excited when it comes to programming
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Sep 20, 2009
I have been working on an HTML editor, and I need to know how to make the "Preview" tab show a preview of the HTML code located in the TextBox in the "Code" tab.
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Nov 3, 2010
I want to use the ExtractAssociatedIcon method to get the icon of a bitmap.
But in MSDN I found the following statement:
When ExtractAssociatedIcon is used with bitmaps, a thumbnail image may be returned instead of an icon if the system that is running the application has a registry setting that causes bitmap files to be shown as thumbnail images.
Is it possible to turn off the thumbnail and get the icon back?
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Feb 24, 2011
I have a system where users can upload PDF documents. Rather than displaying the link to these PDFs as a title link, or a PDF icon link, I would like it to be a thumbnail of the first page of the PDF document.
How can I get a thumbnail image of the first (or any specified) page of a PDF document, using ASP.NET 3.5?
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Jun 27, 2011
I'm trying to create thumbnail previews within my program. These would work for any file type, not only images. So videos too. Right now I'm using IExtractImage to do this. It works perfect, but it seems to randomly crash my program when I call .Extract(). There's no error message, my program just crashes. When I run it in the debugger it doesn't break when it crashes. I have it in a try/catch block and that doesn't seem to help. It's not reproducible and doesn't crash on the same file every time. How can I get it working or just prevent it from crashing my whole program?
I'm using the code from this project:[URl]..
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Dec 16, 2011
I managed to use the class ClassWSThumb [URL] in order to get screenshoots from webpages.Here is the class file:
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Threading
Imports System.IO
[code]....
Everything seems to be working perfectly, but i bumped into a situation were i dont know how to handle.If the target website has some ajax information that needs to be loaded after the ready state, i get a screenshoot of the page with no data, because the data was not loaded yet.
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Jul 27, 2009
I have a simple task in DOT NET that is we take a thumbnail an one of the website home page, when we give an URL like in one text box that time control goes to home page of the specified URL and take a picture that home page as a thumbnail and stored in an our specified local disk like we give more than one an up to 100 URLS at a time and stored orderly stored in an our specified local disk
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Jan 30, 2011
Hey i want to know how u auto press a key example; i got 1 button that's called : Start (button1) and if u click start that it keeps clicking space on your keyboard.
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Sep 20, 2010
ve been exploring with IThumbnailProvider in VB10. The first attempt I made was to handle MKV file thumbnails. I made the library and everything looked OK when I tested it against MS's Thumbnail app that came in the Windows API pack. Then I attempted to implement it on my computer, and every single thumbnail in the OS broke. Not a single thumbnail was generated by the system. So, after a bunch of trying to rescue thumbnails, I reformatted, reinstalled Windows, and got everything back to normal.
Today, I tried again. This time, using BLP files which are often used in Blizzard games (Warcraft III in particular). To avoid the same issue, I threw the compiled result into a Virtual Machine and tested it there, and it looked lovely. After a bit of experimenting and tweaking, I got it exactly as I wanted, cleaned the thumbnail cache, tested it one last time, and then installed it on my actual PC. Bam, all thumbnail generation is broken again.
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Oct 13, 2011
I am in search of a way to access a files thumbnail preview and push it to a picturebox on my form. I have the code below that works for jpg files, however it does not work for say a word document's thubnail. displaying the word documents thumbnail in a picturebox would be great!
Dim myBitmap As New Bitmap("C:Doc1.doc", True)
Dim myThumbnail As Image = myBitmap.GetThumbnailImage(40, 40, myCallback, IntPtr.Zero)
PictureBox1.Image = myThumbnail
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