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Hi.
I want to do some works with a picture and need to work with pixels.
but the getpixel(,),setpixel(,,) functions in a loop are very slow.
is there a way to get or set pixels faster.
my code is like this:
Bitmap myBmp = new Bitmap("filename");
Color p = new Color();
int i,j;
for(i=0 ; i < myBmp.Width ; i++)
{
for(j=0 ; j < myBmp.Height ; j++)
{
p = myBmp.GetPixel(i,j);
if(p.R <= 250) p.R += 5;
if(p.G <= 250) p.G += 5;
if(p.B <= 250) p.B += 5;
myBmp.SetPixel(i,j,p);
}
}
erfan
-- modified at 8:01 Sunday 23rd July, 2006
modified on Thursday, February 12, 2009 5:07 AM
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Hi!
Just use the search function to find Christian Grauss' excellent articles on image processing.
Regards,
mav
--
Black holes are the places where god divided by 0...
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thanks
what is the article's name?
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My answer was that there are articles here on CP telling you how to solve your problem, you just have to search!
If you're unable to find the search button, you can try this page instead.[^]
Regards,
mav
--
Black holes are the places where god divided by 0...
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This[^] article is the first of several.
/ravi
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1.i write a windows service,open a other application,but the process is run,application is not open,the same code in a winfrom project is not any question.the code of open other application is simple:
Process myProc = new Process();
myProc.StartInfo.FileName = strUrl;
myProc.StartInfo.CreateNoWindow = false;
myProc.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
myProc.Start();
strUrl is other application's path,it's right!
2.how to write uninstall windows service code in setup project ,i know command "installutil servicename.exe" can uninstall windows service,but setup project can't use command,can you tell me how to write a unstall project and put the project into setup project's unstall custom action?
Thank you very much!
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1. A windows service usually doesn't have access to the windows desktop and an application started by the service won't have access to the desktop, either.
Most likely this is the reason why the application is not running.
2. Add an Installer to your service, then you can run this Installer as a custom action during your uninstall.
Regards,
mav
--
Black holes are the places where god divided by 0...
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thank you!
i geted the answer of my second question:override Uninstall method in windows service projectinstaller.cs file,in this method write a process.start() ,process.fileName="path\\installutil.exe /u path\\serviceName",when application uninstall,the windows service will be uninstalled.
first question,i selected the serivce propety of "allow the windows desktop",but the application only run a process,have not desktop UI.
i will try and test again!
thank you again!!!
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i wanna ask about the ability to connect sql server 2000 database files
without installing sqlserver 2000 itself but i'm hearin about MS desktop engine can give me this ability with coding using my application is this true or not?
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Do not cross post. I already answered you in the SQL forum[^]
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Hi,
I have a form with multiple textboxes that are bound to a dataset.
When a user changes the content of the textbox how do I get those changes passed back to the database with a "save" button click?
Glen Harvy
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In .NET 2.0 you get use generated table adapter code and call Update on it and pass the dataset as arg. But sounds like you could use a bit of reading on the dataset and ado.
Wout
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Only got 1.1 .
How do you do it in 1.1?
Glen Harvy
-- modified at 7:53 Sunday 23rd July, 2006
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here is an example of doin this in .net 1.1
we got two col in this form textBoxBankID and TextBoxBankName. I hope this should solve ur problem
DataRow dr = accounts1.Bank.NewRow();
textBoxBankID.Text = ((decimal)accounts1.Bank.Rows[accounts1.Bank.Rows.Count-1]["BankID"]+1).ToString();
sqlInsertCommand1.Parameters["@BankID"].Value = bID = Convert.ToDecimal(textBoxBankID.Text);
sqlInsertCommand1.Parameters["@BankName"].Value = textBoxBankName.Text;
dr["BankID"] = bID;
dr["BankName"] = textBoxBankName.Text;
accounts1.Bank.Rows.Add(dr);
int n = sqlDataAdapter1.Update(accounts1,"Bank");
MessageBox.Show(n.ToString());
accounts1.AcceptChanges();
// write code to refresh the dataset
//as ds.Clear();
//da.Fill(ds,"Bank");
Rocky
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Are u suggesting that I create a new dataset with the data that I want to be displayed to the user by filling it with the data from the various related tables?
As far as reading material is concerned - what do u suggest? I have searched the net extensively and have purchased "A programmers guide to ADO.Net in C#" but I'm stll confused!!
Glen Harvy
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Hi,
I need some example how to do it - i really don't understand how to do use invoke method in control.
Thanks.
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Take a look through these [^]articles on CP. Don't follow my sig guidelines 
As of how to accomplish this I wouldn't have a clue at the moment and I'm too lazy to google it
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very simple methods are in C#,
view some programms and see how it works.
http://www.engineeringproject.net
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The example is easy:
private void button1_Click(object sender, EventArgs e)
{
MethodInvoker mi = new MethodInvoker(MyMethod);
Invoke(mi);
}
private void MyMethod()
{
}
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Hi,
How can I develop a win service to detect IP changes,
actually I have a win service listening on a port to do some print jobs, I have to send the ip address at first for a web service, so I want to update the IP address for the service,
How can I write the thread in the service???
MMR
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yeah, try NotifyAddrChange function in Ip Helper
The NotifyAddrChange function causes a notification to be sent to the caller whenever a change occurs in the table that maps IPv4 addresses to interfaces.
DWORD NotifyAddrChange(
PHANDLE Handle,
LPOVERLAPPED overlapped
);
Parameters
Handle
[out] A pointer to a HANDLE variable that receives a file handle for use in a subsequent call to the GetOverlappedResult function.
Warning Do not close this handle, and do not associate it with a completion port.
overlapped
[in] A pointer to an OVERLAPPED structure that notifies the caller of any changes in the table that maps IP addresses to interfaces.
Return Values
If the function succeeds, the return value is NO_ERROR if the caller specifies NULL for the Handle and overlapped parameters. If the caller specifies non-NULL parameters, the return value for success is ERROR_IO_PENDING.
If the function fails, use FormatMessage to obtain the message string for the returned error.
Return code Description
ERROR_CANCELLED The context is being deregistered, so the call was cancelled immediately.
ERROR_INVALID_PARAMETER An invalid parameter was passed. This error is returned if the client already has made a change notification request, so this duplicate request will fail.
ERROR_NOT_ENOUGH_MEMORY There was insufficient memory available to complete the operation.
Using P/Invoke to import this function to a static Method
[DllImport("Iphlpapi.dll")]
public static UInt32 NotifyAddrChange(
ref IntPtr Handle,
ref OVERLAPPED overlapped
);
//
struct OVERLAPPED
{
....................
}
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How to excecute stored procedure by using c# application in run time?
I need to know the coding.
Please someone help me as soon as possible
Thanx
Thilani
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00thilani wrote: How to excecute stored procedure by using c# application in run time?
Have you searched anywhere yet?
The following classes will be useful to you:
* SqlConnection[^]
* SqlCommand[^]
* SqlDataReader[^]
The following properties and methods on the command will be useful to you:
* CommandType[^]
* ExecuteReader()[^]
If you try something and it doesn't work then show us what you've tried and we can help you out. There are plenty examples in the links that I gave you. If you are still stuck, show us what you did and we can correct it for you.
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I have a WebBrowser component on a form, and it interacts with a site (www.zoomin.co.nz)though Javascript.
The Javascript contains functions such as GPoint gpt= GMap.getCenterLatLong()
In my application I need to be able to call that function in Javascript and find out the values for gpt (of the two floating point values that make it up) in my C# code.
Thanks
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If you look inside the Document property there is a method called Invoke or InvokeScript (something like that anyway), you can pass the function name and parameters of the JavaScript function to invoke through this. As for getting the results it's probably documented in the documentation about the InvokeScript function.
(This may not be completely accurate but I do know that such a method does exists since I've used it but for reasons given in my sig I won't guarantee the accuracy  )
As of how to accomplish this I wouldn't have a clue at the moment and I'm too lazy to google it
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