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Hi Sreejith,
I was hoping not to have to rebuild the datatable columns...
DataTable.Reset() clears the columns.
Ron
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Hi, i was wondering is it is possible to pull out the pixels values and display it out. (eg. pixel 1 ->[2,25,125])
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GetPixel will do this if you have only a few pixels to do. For speed, if you want them all, you should read my image processing articles.
Christian Graus - Microsoft MVP - C++
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how many pointers do i need? 1 or 3? sorry abt that i just took up C# because of my project requirements i am rather confused now thanxz in advace
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Soulblazer wrote:
how many pointers do i need?
Do you mean to read an image ? 1. My articles will have several images open at once, as they are applying filters.
Soulblazer wrote:
sorry abt that i just took up C# because of my project requirements
What did you use before/why the move to C# ?
Christian Graus - Microsoft MVP - C++
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i have only learnt Java basic however my supervisor wants us to pick us C# to do this project. i am confused as to i have to pull out the red, green and blue values for all the pixels of the whole picture so i was thinking maybe i would need three pointers one for each color. i have been looking at all 6 of your image processing articles for the pass 1 month++.
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Soulblazer wrote:
i have only learnt Java basic however my supervisor wants us to pick us C# to do this project
They are basically the same thing, so no biggie.
Soulblazer wrote:
i am confused as to i have to pull out the red, green and blue values for all the pixels of the whole picture so i was thinking maybe i would need three pointers one for each color
No - did you read my articles ? The byte array that is returned contains a series of bytes, with three for each pixel, blue, green, then red.
Why do you need to pull all the pixels out ? What will you do with them ?
Christian Graus - Microsoft MVP - C++
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i need to display the pixel values inorder to see clearly how the values changes each function.
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You're showing ALL The pixel values ? Must be a small bitmap, perhaps GetPixel is all you need.
Christian Graus - Microsoft MVP - C++
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erm it is a big one but will be cropping out a certain part of the picture to see the values.
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Same deal - if you only want to pull out a small number of values, you may decide to use getpixel, to simplify the code.
Christian Graus - Microsoft MVP - C++
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ok thanx i will work on it
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i am doing a quiz web page using visual studio.net
i want to show 1 question per page
but i having trouble displaying the row of data i want.
For my database i created, i having 4 columns
- QnC --- Contains my questions and choices (text)
- QID --- questions identity number
- Choice --- choices identity number
- Ans --- answer (not that important, i havent reach this part)
this is my code for sql:
Cmd.CommandText = "SELECT [QnC] FROM Quiz " +
"WHERE [Choice]= " + i + " and " + "[QID]= " + i + "";
"i" is an integer i declared.
i wanna to display the question and choices but i only get to display question even if i use this code:
Cmd.CommandText = "SELECT [QnC] FROM Quiz " +
" WHERE [Choice]= " + i + "";
For this part the column is empty for the row contain questions.
Please tell me where i goes wrong...
fire85
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You don't have a column called Choice, not that I can see. If you did, it would have the same value as QID ?
What does 'select QnC from Quiz' return you ?
Christian Graus - Microsoft MVP - C++
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Sorry i typed wrongly, i modified it.
for what i expected from 'select QnC from Quiz'
is the Questions and choices that stored in that column.
fire85
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What's the point of having two columns (Choice and QID), if they always contain the same value ?
Christian Graus - Microsoft MVP - C++
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For another webpage, I wanted to display only the questions in datagrid.
So i seperated it into 2 columns to make it more simple for me to call.
fire85
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None of this makes any sense. You have two columns, but when you do a query, they both get checked for the SAME value ( the value of i ). how does that make it simple ?
Christian Graus - Microsoft MVP - C++
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But if put together in 1 column i dont know how to seperate it out when i need to display just question only. So i make it in this way.
But now think of it, when calling the questions will also be troublesome too
I will work on my database for better calling 
Thanks alots, Sir Christian Graus.
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fire85 wrote:
But if put together in 1 column i dont know how to seperate it out when i need to display just question only. So i make it in this way.
ARGH !!!!!
IF THE CODE YOU POSTED IS CORRECT, THEN THESE COLUMNS ALWAYS HAVE THE SAME VALUE FOR EACH ROW, SO THE SEPERATION IS WORTHLESS !!!!!!
Now. If you do a SELECT * from this table, do those two columns always have the same value per row ? If not, then your code is wrong. If so, then your database design is ridiculous.
Christian Graus - Microsoft MVP - C++
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Sorry just found out is because of the design of my database (just did some testing) so i cant display others data.
Thanks alot for your time
fire85.
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how do i add advanced properties in a usercontrol ?
someting like
ImageList.Images shows Image Collection Editor
or ListBox.Items shows string collection editor...
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CiNN wrote:
how do i add advanced properties in a usercontrol ?
The more advanced they are, the more code you need to write. You're completely in control, and completely responsible for writing the implimentation. If you want more specific info, ask a more specific question.
Christian Graus - Microsoft MVP - C++
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i need access to store some images in an imagelist in my usercontrol
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Oh, OK. Can't you just add a property that exposes the images in the imagelist ? Or are they not there as a collection ?
Christian Graus - Microsoft MVP - C++
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