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Richard W Allen wrote: Does anyone know what I am doing wrong?
Yes and no: here's your problem
Richard W Allen wrote: "Parameter is not valid" when the form loads.
Without some code we can't do anything else.
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I'm not sure that code would help. The exception occurs on the line:
Application.Run(new SC226());
If I have Double Buffered set to false my application runs OK but I do get flicker on my chart. If I set Double Buffered to true, my application starts OK, but I get the exception when I open the Double Buffered form.
I am not sure how to interpret the exception details, but there are a lot of references to "System.Drawing.Graphics" and "System.Drawing.BufferedGraphics"
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Richard W Allen wrote: I am not sure how to interpret the exception details, but there are a lot of references to "System.Drawing.Graphics" and "System.Drawing.BufferedGraphics"
Then just paste it, maybe one of us can help 
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Here are the exception details:-
System.ArgumentException was unhandled
Message="Parameter is not valid."
Source="System.Drawing"
StackTrace:
at System.Drawing.Graphics.GetHdc()
at System.Drawing.BufferedGraphics.RenderInternal(HandleRef refTargetDC, BufferedGraphics buffer)
at System.Drawing.BufferedGraphics.Render()
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at SC225.Program.Main() in C:\Documents and Settings\Richard Allen\My Documents\Visual Studio 2005\Projects\SC225\SC225\Program.cs:line 17
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
at System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
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Sorry, I cant seem to help you on this one 
I suggest however, you try find out the 'this' context of the COntrol at 'System.Windows.Forms.Control.WmPaint(Message& m)' (just go down the callstack). Then remove that control temporarily, and try again.
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Maybe this might cast more light on the problem:
The exception occurs in the line:-
Application.Run(new SC226());
but SC226 is my application, so shouldn't this line only run when the application starts?
If I have Double Buffering off, this line only runs at the start of my app. If Double buffering is on, it runs again straight after the paint method of the form that is double buffered. But why??!!! Is something causing my app to reset?
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Hi
what is the property name for reading 'web page' of the user from active directory.
may i have complete list of the property for windows server 2003?
Thank you
Jayesh Talsaniya
Jayesh Talsaniya
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how can make a userdefine collection in c# and what's delegate(c#) with example?
Thanku sir/madam
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Hi,
What is the difference between Object and object?? And also String and string? Is object and string "lighter" versions of Object and String respectively?
Are there other as well?
Regards
ma se
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ma se wrote: Is object and string "lighter" versions of Object and String respectively?
Nope, it's just one starts with a capital and the other doesn't  The ones with the Upper case are actually System.Object etc, and are the objects in the base class Library. The ones with lower case are the C# aliases to those objects.
ma se wrote: Are there other as well?
Yep, int and System.Int32 etc.
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ma se wrote: What is the difference between Object and object??
The object type is an alias for Object in the .NET Framework. Same is for string.
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Hi,
Here is my requirement.
"writing an SDF file to decode the document (scanned image)". how can I do this in C# winforms. Please provide some samples if you have. Thanks in Advance.
AR Reddy
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private void txtBody_TextChanged(object sender, eventArgs e)<br />
{<br />
if(tbWordwrap.Pushed)<br />
{<br />
int maxLength = 65;<br />
string[] tempArray = new string(txtBody.Lines.length);<br />
tempArray = txtBody.Lines;<br />
<br />
int Prevsel = txtBody.SelectionStart;<br />
string Op = "";<br />
<br />
bool change= false;<br />
<br />
for(int counter = 0; counter < tempArray.Length; counter++)<br />
{<br />
if (tempArray[counter].length > maxLength )<br />
{<br />
string[] Words = tempArray[counter].split(' ');<br />
int currentLineLength = 0;<br />
string currentLine = "";<br />
foreach(string currentWord in Words)<br />
{<br />
if(currentWord.length > 0)<br />
{<br />
if(currentWord.length >= maxLength)<br />
{<br />
Op += curreentWord.Insert(maxLength, "\r\n");<br />
break;<br />
}<br />
if (currentLineLength + currentWord.Length + 1 < maxLength) <br />
{ <br />
<br />
currentLine += " " + currentWord;<br />
currentLineLength += (currentWord.Length + 1); <br />
} <br />
else<br />
{<br />
<br />
Op +=currentLine.insert(currentLineLength,"\r\n);<br />
currentLine = currentWord;<br />
currentLineLength = currentWord.Length ; <br />
} <br />
<br />
}<br />
}<br />
if(currentLine != "")<br />
Op += currentLine;<br />
<br />
<br />
Prevsel++;<br />
change= true;<br />
}<br />
else<br />
{<br />
Op += tempArray[counter] + "\r\n";<br />
}<br />
}<br />
<br />
if(change)<br />
{<br />
txtBody.Text = Op;<br />
txtbody.SelectionStart = Prevsel;<br />
}<br />
}<br />
}<br />
<br />
<br />
Above code is for text editor in which a user can fix no. of characters in single line. If user fix to 65 char then in single line 65 character will appear.
Its working but having some problem,if user types a line
like: "This is trial message."
Now suppose the above character count are equal to 65, the code now supress the spaces in above line,
i.e it modify the line
like: "This is trial message."
It omits the spaces. How can i modify this code that it would also count the spaces, maxLength is variable for the no. of char in a line.
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humdumof wrote: string[] Words = tempArray[counter].split(' ');
This removes the spaces. So, add one for every word you add, obviously.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Hello,
I am developing C# form application.
I want to pass some user editable command line data to application before execution. So that i can read it before main() gets execute.
How can i pass these data and read it from my application.
Thanks.
Gajesh
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static void Main(string[] args)
{}
where args is a string aray that has the command line arguments in it split by spaces.
Heres one of the articles you'll find right here on codeproject if you search ...
http://www.codeproject.com/csharp/Command_Line.asp[^]
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thanks originSH,
But how end user will pass data from application exe?
I thought of editing the application properties(RClick on application icon -> propertry) but i couldn't find command line editor in any of the tab.
Thanks.
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gajesh wrote: But how end user will pass data from application exe?
*from* the app ? You can pass data TO the app, on the command line.
gajesh wrote: I thought of editing the application properties(RClick on application icon -> propertry) but i couldn't find command line editor in any of the tab.
you can only edit the command line of a shortcut, not the app itself
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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gajesh wrote: But how end user will pass data from application exe?
Either by launching program from cmd or by modifying target which is on the shortcut tab of properties window
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gajesh wrote: So that i can read it before main() gets execute.
Nothing happens before main gets executed. Your command line args are available from the Application object, however.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I think you are talking about console application in c#
if u look at your main method
static void Main(string[] args)
{
//
// TODO: Add code to start application here
//
/// Added next line to print input on console
Console.WriteLine(args[0]);
}
it accepts array of string, this is area where u can pass values
e.g myapplication.exe parameter
Atul kumar
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How Can i read and write to excel sheet
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