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Hi guys,
In my program I want to view thumbnails.. But when the original image size goes up the program starts to freeze..
In my method I directly load the original image to an Image object and then using the GetThumbnail(....) method resize it and pass to another Image object. But it seems this is not an effective way !!
Is there ny idea, or trick or something else to increase this performance ?
I am open to any advice..
Best regards
.:: Something is Wrong ::.
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Hello
Try to load the images themselves and resize them to the size you want -I heard alot about Thumbnails poor performance-.
Also try to load each image using a different thread. This would work like download accelerators, and will preserve you UI active.
Regards![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
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I have visual studio 2003 installed.
Everything was working fine till now, but all of a sudden i am not able to open windows form in designer mode.
When i try to open it, i get the message <<an error="" occured="" while="" loading="" the="" document.="" fix="" error,="" and="" try="" document="" again.="" message="" follows:="" unspecified="" error.="">>
I tried closing the IDE and reopening, rebuliding (funny thing is it builds fine and the form gets displayed when i run the application), closing the solution and building form command prompt.
Nothing that I did fixed the issue.
Any idea anyone???
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Hi Friend,
what you have to do open the code view if window which does not open in design mode
and check that the first class name in the namespace must be the class name of the form's class
i.e. it may be Form1 like that. Other classes should be below that.
Rahul Kulkarni
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I have same problem with ActiveX components on form.
But when I reopening VS2005 all works fine.
Maybe you trying to access some object before it's initizlisation ?
Analize your callstack.
My english is not so good. Please, correct my errors.
Best regards, Alexey.
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Thanks for the suggestions.
Actually the problem was not with any initialization or anything sort of that. The same solution was working perfectly fine until yesterday!
I had installed some system updates...not sure if that has goofed up my IDE.
But anyways, i just went about cleaning up all my projects, bin/obj/cproj.user and then opened the solution again, built it. Things are working fine now.
Hopefully i shouldnt face the problem again...else i'll have to setup a schedule task to do this everyday.;)
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You can simply write bat file or VS plugin.
My english is not so good. Please, correct my errors.
Best regards, Alexey.
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Weird thing with VS (2005 at least)... If you aren't relying on DB data for your controls when you initialize them (which I learned not to do the hard way...) you might need to delete the bin and object directories from your solution folder.
Close all designer tabs open in the IDE. Close VS. Delete those folders. Re-open VS. Recompile the app. Then re-open the files that were having problems.
Don't know why this happens, just know this sometimes solves it.
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i have to create a group box then in the groupbox i have to put one radio button, when i will select the radio button it will enable one datagrid.In the datagrid there are 4 columns . all these column names are Name, Type, Attribute and Length.
All these columns are text boxes.
Attribute column it shall be replaced by a read only text. Possible values shall be “Read only” or “Editable“..
Length shall be replaced by a read only text.. Possible values shall be “Fixed” or “Variable“
i have to adda tooltip for this datagrid and while cursor p[oint will move from one text box to another it should display the user information . Information could be any thing.
Could you please send me the code for this particular requirement..
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I'm not sure what to call this. but i rember once seeing this color wheel which showed the best opposing colors...like yellow was the color opposite black.
I'm not trying to figure out how to invert a color.
so i want a function where if i send in the color black, it returns yellow.
i'd settle for the name of that sorta color wheel :P
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substract the RGB combination of current color from RGB(255,255,255)
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Hi,
After reading your disccission i have a question.
that is how to get the rgb codes of the specific color,
for example what are the rgb combinations of the color yellow.
thanks.
Nitin...
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Try this:
Color original = Color.Yellow;
Color opposite = Color.FromArgb(255 - original.R, 255 - original.G, 255 - original.B);<pre>
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Ok i did some research and it turns out that complementary colors is same as inverted colors, for most part. so blue is the opposite of yellow, not black
Here's another way to get inverted color... not sure if its more effecient.
private Color InvertColor(Color color)
{
byte bRed = (byte)~(color.R);
byte bGreen = (byte)~(color.G);
byte bBlue = (byte)~(color.B);
return Color.FromArgb(bRed, bGreen, bBlue);
}
This site helped to explain it: http://www.webwhirlers.com/colors/combining.asp
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When I will press the backspace it shouldnt delete at a paricular position.How to do it
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Hello
There are several approaches. This is the one I use:
bool ToChange = true;
string OldText = "";
private void TextBox_KeyDownHandler(object sender, KeyDownArgs e)
{
If(e.KeyChar == "\b")
{
OldText = TextBox.Text;
ToChange = false;
}
else
ToChange = true;
}
private void TextBox_TextChanged((object sender, KeyDownArgs e)
{
If(!ToChange)
{
TextBox.Text = OldText;
TextBox.SelectionStart = TextBox.TextLength;
}
}
You see. The text hasn't changed when the keydown event was fired. So if we don't want to accept thechanges we store the original text in a string. Once the text has changed, the TextChanged event will be fired. It will check to see if we want to accept the changes. If not, revert to the old text.
If anyone got a better approach, please post.
Regards![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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Hi,
You can also set the KeyChar = 0 in the KeyPress event ! I think you will have to cast 0 in to char for such assignment.
Try it !
Hope it works !
"A good programmer is someone who looks both ways before crossing a one-way street." -- Doug Linder
Anant Y. Kulkarni
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private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
if(e.KeyChar == (char)Keys.Back)
e.Handled = true;
}
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I use lower case to declare data variables in my classes. When doing this for objects like buttons and then adding an event handler by double cliking in the designer, the event handler uses the same lower case in the method name. Is there a setting to force this to uppercase?
For example:
I have a button called: moveUpBtn;
When I double click on this in the designer, I get the event handler: moveUpBtn_Click().
I then refactor it to: MoveUpBtn_Click(), but would prefer to have VS handle this automatically.
Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke
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Type whatever name you like into the properties window, or write an add-in ( and a CP article )
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Christian Graus wrote: Type whatever name you like into the properties window, or write an add-in ( and a CP article )
Yeah, I'm lazy, what can I say?
Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke
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i find this framework in
http://www.codeproject.com/cs/design/razorpt1.asp
http://www.codeproject.com/cs/design/razorpt2.asp
it's good framework,but it's documents and examples sources code less.
simple is better
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I have a question about SqlDependency.
When using the SqlDependency class to get a notification of a change to a table, what is the best way to actually find out what data has changed? Is this even possible?
We are working on a stock trading system in which stocks are valued based upon notifications in the changes of the price, quantity, etc. Any light that you could shed would be helpful! Thanks a ton!
Ryan Heaney
rheaney@sgfallc.com
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Hello,
Have a question. Trying to compare 2 arrays and adding the difference in a 3rd.
Array1 has {hello,bye,goodluck,bonjour} and Array2{hello,bye,bonjour}, and the
third should then get {goodluck}
Now, I found a way, but.. it's just plain cheap in my opinion and I'm sure there's a better, faster way of doing this. Here's what I got.
int count=0;
string[] array1 = new string[5];
string[] array2 = new string[3];
ArrayList array3 = new Arraylist(array1.length - array2.length);
for (int x = 1; x < array1.Length; x++){
listLocal.Items.Add(array1[x].ToString());
for(int y = 1; y < array2.Length;y++){
if (!local[x].Contains(array2[y].ToString()))
count++;
if(count==array2.Length-1)
array3.Add(array1[x].ToString());
}
count = 0;
}
Of course the way the code is now, it means that array1 while always
be larger then array2, so when array2 is larger I have to place another if statement.
So please, what's the better way? Show me the light and release me from these infernal
"IF"s and "FOR"s ..
Thank you,
Loneferret
_____________________________________________________________________
Cross my heart, smack me dead...stick a lobster on my head.
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If you can sort the arrays first, that will help a lot, then you can use a binary search to find items, and just step through items in both that are alike until you find one that isn't.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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