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I certainly won't claim to be as expert of a programmer as you 2 are. However,I have to disagree with you guys on at least 1 point. You can do fast image processing in vb.net but it requires you to use a simple work around just like you do in C# (getpixel setpixel sucks). I've used this work around myself on an ancient 700mhz laptop and its really fast. I've been meaning to write article about it for a while (I'll probably be submitting it soon).
I don't know alot about directX or opengl but since you typically call those functions for 3d graphics why would vb.net be bad for 3d graphics when it's not really the work horse.
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MikeMarq wrote: I've been meaning to write article about it for a while (I'll probably be submitting it soon).
We will welcome it.
Don't bother about my sentences: just humour about average VB developers.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
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MikeMarq wrote: You can do fast image processing in vb.net
You can access the pixels directly ? I thought you couldn't b/c of the lack of pointer access ?
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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If I am altering an existing file what I do is copy the contents of the file into an array. I do all my reading and writing of pixels in the array. Then I copy the array back into a memory stream and display the memory stream.
Your method with pointers is probably slightly faster since it doesn't require any copying but my method is fast enough that you can create/alter and display an entire image in less than a blink of an eye so the difference doesn't really matter.
I suspect setpixel/getpixel is so slow because it probably repeats the calculation of how many bytes per line every time it is called. In my system this only needs to be done once which saves a huge amount of processing time.
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hello everyone.....
i have problem regarding read/write i.e. open and save file in menu editor.i m using vb6. so can anyone suggest me how to do that.i have used this code but its not working...n i dont know why...
Set oFso = CreateObject("Scripting.FileSystemObject")
sFilepath = cdg.Filename
oFso.CreateTextFile (sFilepath)
Set f = oFso.GetFile(sFilepath)
Set oTextStream = f.OpenAsTextStream(ForWriting, TristateUseDefault)
oTextStream.WriteLine "hello..."
regards,
pulkit joshi
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It's not working because you are opening the file (when creating it), and then try to open it again without first closing it.
The CreateTextFile creates the file by opening it for writing, so you should take care of the text stream object that the method returns, and not try to open the file again.
Don't forget to close the stream when you are done writing to it.
Despite everything, the person most likely to be fooling you next is yourself.
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How to develop a tool in VB.net for comparing the two different file format documents (Like PDF , Word, Excel , HTML)
Please guide.
modified on Wednesday, May 14, 2008 4:30 AM
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First step is to find the libraries you need to even read those formats. Next is to define what you're comparing ( for example, if the same numbers appear in a row in Word, in a table in HTML and in a sheet in Excel, does that mean they match ? )
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Christian Graus wrote: First step is to find the libraries you need to even read those formats. Next is to define what you're comparing ( for example, if the same numbers appear in a row in Word, in a table in HTML and in a sheet in Excel, does that mean they match ? )
You are a saint.
Jon
Smith & Wesson: The original point and click interface
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Hi ,
From a datagridview I would like to get the data of the complete row for a cell that's double clicked by end user.
example if the data grid has following view
<br />
customer name | Gender | DOB<br />
hum | M | 1976-01-01 <br />
tum | F | 1977-01-01<br />
Woh | F | 1989-01-01<br />
If the user clicks on the row 2 that is for customer tum all the data should show up in a text box
Any idea tutorial or a hint would be of great help
Thanks in advance
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The easiest thing what u can do is find the row of current cell, and take the values of each col of the row and put it in the required text box
Eg
rowNo = DataGridView.CurrentCell.rowIndex<br />
<br />
TextBox.text=DataGridView.Rows(rowNo).Cells(0).Value.tostring
Good Luck
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In the cell double click event use the e.rowindex (I think) to get the row then iterate through the columns/cells. You can also use the bound datatable once you have the row index.
Never underestimate the power of human stupidity
RAH
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I tried that but did not work.
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Then you are doing something wrong in your code, heres a snippet that I use to get the id from the first column and check the column header of the clicked column. From the CellDoubleClick event
iID = dgData.Rows(e.RowIndex).Cells(0).Value
If dgData.Columns(e.ColumnIndex).HeaderText = "mytext" Then
Never underestimate the power of human stupidity
RAH
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I got it did something like
<br />
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellDoubleClick<br />
Dim myrow As Array<br />
Dim mydatarow As DataRow<br />
mydatarow = DS.Tables(0).Rows.Item(e.RowIndex)<br />
myrow = mydatarow.ItemArray<br />
Dim mydata As String<br />
mydata = myrow.GetValue(0)<br />
MsgBox(mydata)<br />
End Sub<br />
its giving me what I want
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I m beginner to VB.Net.
Can some one help me in the syntax for Ternary Operator in VB.Net.
Regards,
LEE
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The nearest is the IF.. THEN.. ELSE..
Bob
Ashfield Consultants Ltd
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There is no ternary operator in VB.NET. The closets equivilent is the IIf[^] function.
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VB 2008 does have a true ternary operator with an alternative use of the existing keyword 'If':
result = If(somecondition, iftrue, iffalse)
this is equivalent to the C# code:
result = somecondition ? iftrue : iffalse;
David Anton
http://www.tangiblesoftwaresolutions.com
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Whenever my flyout window is displayed on website then it will display backgroud dropdown list box into that flyout.
Means flyout window also show dropdownlist of that page also,
so how to display flyout without dispaying that dropdownlist control.
please help me
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What is a flyout ? You should be asking in the ASP.NET forum.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Please ignore.
Does it matter what I write here? Someone just has to say something about it.
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Hi all....
--> How will i make an auto-completion textbox from a standard textbox? But don't tell me to create your own control.....!! 
J A Nasir K
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Jamal Abdul Nasir wrote: But don't tell me to create your own control.....!!
OK, in that case, I guess the answer is, pray.
Or you could read the article I link to in my sig. See if at the end of that, you're capable of using google to find this[^], as I did.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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There is another way out...
You can use combo box and set the drpupdown style to 'Simple'
May be this will help...
Good luck
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