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Im using C# with vs 2002 to create a plugin for an industrial robot. because there is no mouse or touchscreen and usually the user doesnt know that they can use the tab key, how do i switch between controls programmatically using the buttons on the form? I have tried the following
private void Tabstop(object sender, IncrementEventArgs args)
{
if (args.Plus)
{
this.TabIndex = this.TabIndex + 1;
}
else
{
this.TabIndex = this.TabIndex - 1;
}
}
this isnt doing anything for me though.
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Hi,
Your code is just changing the tab order of the calling control. You need to use this method
public Control GetNextControl (
Control ctl,
bool forward
)
which returns the next control in the tab order. I've never used it myself but I assume that once you have a reference to the control you would then set focus to that control.
Alan.
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Hello,
Where can I read about the best practices for programming in C# to be compatible with both 32-bit and 64-bit platforms?
I am relatively new to C#, so I was wondering whether it's possible to write a program that would be compatible on both 32-bit and 64-bit platforms. For example, if I use IntPtr, casting it to int (or long), adding IntPtr.Size and casting back to IntPtr, how do I do it to be compatible with both 32-bit and 64-bit platforms?
I would be thankful for any helpful resources about best practices.
Thank you.
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i draw a picture box and in it i place a picture..
i want that when i want to increase the size of the picture with picture.
as long as picture box 's size is increased , picture should also be increase with it.
hghghgh
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use PictureBox.SizeMode property
hope it helps
dhaim
programming is a hobby that make some money as side effect 
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 been there
see windows genereted code has the required proprieties!!!
i have a picture box and i load small and big pictures, when they are small i center them, when they are big i place a scroll.
you want that right?
place picturebox inside a panel and allow scroll, now because i don´t remember the code (don´t worry it´s simply) check like i said windows genereted code and the proprieties windows.
make them same size(panel and picture), when get picture ask the size that way you know if is small you center if bigger you scroll.
(place other post if you became stuck, i don´t have code memorized in my head) 
nelsonpaixao@yahoo.com.br
trying to help & get help
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i made a textbox and a combo box(combo box contain all available font sizes) ..
now i want that when user enters the data in it..
he can also increase the size of the written text in textbox by selecting the size from the combo box....
hghghgh
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Try this.,
textBox1.Font = new Font(textBox1.Font.Name,
float.Parse(cboFontSizes.Items[cboFontSizes.SelectedIndex].ToString()));
Handle the above statement in SelectedIndexChanged event of cboFontSizes
where textBox1 is the TextBox used and
cboFontSizes is the ComboBox having TextSizes;
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i am not sure about the terminoly but it would be great if anyone could just point me to the correct term for the technique so I can research it. It's when partially displaying a set of information coming from an sql query in a c# application. A next (and preferably also a back) button is provided to navigate say every batch of 20 items. Also, doing this, which is best for the technique, to query everything from sql and have it cached within the application and next just fetches from this 'collection' OR actually caching in the sql server, if it is at all possible. if the former, i think its disadvantage is the application would require large amount of ram for a large result set. for the latter, this means an sql command is sent to the server to fetch the next batch of the result set, while not really sending another select statement or using a where clause. i hope i am making sense as i'm only really guessing here what i think is happening.
thanks for any reply!
----------------------------------------------------------
"unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep" - my daily unix command list
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i found somewhere of sql statement like LIMIT in MySQL that compatible with sql2000
SELECT TOP(@LIMIT) * FROM TABLE WHERE KEY NOT IN (SELECT TOP(@OFFSET) KEY FROM TABLE)
just fill LIMIT and OFFSET parameter for paging
hope it helps
dhaim
programming is a hobby that make some money as side effect
modified on Thursday, September 18, 2008 11:11 AM
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i'll have a look at the links as it's pretty late (past midnight) and i'm really tired...
but re: select top 10 *
i reckon this will not work (?) because how i envision it, is the next button is mapped to the 'paging' select... the above code does not guarantee that rows resulting from the first batch will not be in the second batch and so forth... in fact it will result in the same set of rows... unless i create a stored procedure that includes a multiplier along the following code:
select
top (10 * multiplier) *
from
transactionsTable
...then again, i would probably need to put an order by some column at the end of the clause.
----------------------------------------------------------
"unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep" - my daily unix command list
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swjam wrote: above code does not guarantee that rows resulting from the first batch will not be in the second batch
Yes, that's why you have to combine it with the ROW_NUMBER() function to get a specific range of rows. The first link covers how to do this.
Or, like Mbah Dhaim suggested, you can use a sub SQL query to keep the already covered pages out of the results.
Obviously, if you are doing any of this, you need to be aware that new data may be being entered into the database, or existing data might be updated or removed between you accessing the pages.
It definitely works, whether it's efficient or not, I don't know. I'd make sure you run some tests, and read up on what would be the best indexes to use.
You might get more expert answers in the SQL server forum now you know what it is to ask about.
Good luck
Simon
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How can you print a datagridview? First, I want to put it in a print document for viewing before I allow to print it. Can anyone give me the full detail of how to do it? Thanks!
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Hi,
What's the best way to search a DataTable and retrieve a value??
Any possibility to use an sql Select statement??
All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)
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Thanx 
But I still cant use it correctly!
DataRow dr = dt.Select(textboxSalary.toString()+"> MIN_SALARY AND "+texboxSalary.ToString()+ " < MAX_SALARY")[0];
cannot apply operand < to string!!
How can I do it when I need to concatenate integer values as a string for the select statement
Thank you Giorgi!
All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)
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Thanx again Giorgi!
All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)
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if datatable has primary key, you can search using DataTable.Rows.Find(object key) or DataTable.Rows.Find(object[] keys).
if you prefer more like Sql statements, create a DataView instance from your datatable and supply RowFilter property with your criteria ie. 'a like '%filter%' or b=1 and c='2'' etc.
hope it helps
dhaim
programming is a hobby that make some money as side effect
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i made a combo box ...
now i want that when i click on it for drop down,
it should be displayed all available fontsizes in it.
how can i do it....
Maifs
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