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I tried changing primary key data type from "PM" to "Text" in the db and now it works just fine. I really did have a primary key though , and after reading that thing about "...OleDbDataAdapter not fetching primary key constraints..." on MSDN i really thought i was in trouble.
But as always, the problem lies in something small and unsignificant to the eye
Dave Kreskowiak wrote: [EDIT]Sorry, wrong language for the forum...[/EDIT]
I'm pretty fluent in VB syntax so i don't mind
Thanks a lot for the help!
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Stefan R wrote: I'm pretty fluent in VB syntax so i don't mind
Yeah, I changed the code becauseif you're caught posting VB code in the C# Forum, ... well, let's just say it makes the movie "Desparado" look like a Sunday Brunch.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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if i create a webbrowser object, and there is a form (with name="something") on the page displayed, is there a way i can automatically submit it using c#?
thanks in advance,
sam kline
<a href="http://dying.about.com/gi/pages/poll.htm?poll_id=2068629450">YES</a>
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Hi, Does anyone know a good way to make reports in c#? not in Crystal Reports(Money issue) ..
i'm lookin for a simple report, maybe something thats like access reports.. ..
any idea will do ..
thanks in advance ,.. Yosi.
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There is at least one free library that draws graphs, you could use that to create your own report, I guess. You'd have the data you need from your data source already.
Christian Graus - Microsoft MVP - C++
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I recently made reports using the GDI, PrintDocument and PrintPreview controls of .NET. Although its a lot of boring work when you use GDI to draw lines and such but I did it.
Bikash Rai
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Is there anychance you can post me the code?
i'm in a mess... i got this presentation on sunday, and i was counting on that crystal reports, but then i found out it need to be registerd...
anyhow,, if you could post me the code , i will the most grateful man on eatrh!
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I have sent you the code as a Zip attachment. Although the code is in VB.NET I think you won;t have any problems porting it to C#. I couldn't post the code here because the code's long...... really long.....
Happy Printing...
---
With best regards,
A Manchester United Fan
The Genius of a true fool is that he can mess up a foolproof plan!
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http://www.codeproject.com/csharp/letaonarticle2.asp
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The code are looks like this:
Panel panel1 = new Panel();
if(panel1.CanFocus){
panel1.Focus();
}
Then it generated a exception at the run-time.
An unhandled exception of type 'System.InvalidOperationException' occurred in mscorlib.dll
Additional information: Collection was modified; enumeration operation may not execute.
Focus() has nothing to do with the collection, is that because of UIPermission fails?
Thanks
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Perhaps a handle of panel1 fires a method that generates that exception or that prepare the field for the exception.
protected internal static readonly ... and I wish the list could continue ...
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You're getting this error because a Panel control cannot receive the input focus. See Control.Focus()[^] for a list of controls that cannot be .Focus ed.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thanks a lot. I will try to not use focus() in my code.
In fact, my problem is as this:
if(A.Focused){
B.Focus();
A.Focus(); //get an exception in main()
}
The reason for reset A's focus is that I want to clear A's keyboard input buffer. Otherwise the A's keyboard input will always be put into the next selected item.
I guess it is a bug in .net library and it can not be fixed without the source code.
Thanks again.
Merry Christmas to everybody
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This won't clear the keyboard buffer. Once the keystrokes are sent the that window, that's it. That window has to process them.
BTW: This is NOT a bug in the .NET Framework. This is the documented behavior of the control! The bug is in the design of your code.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi, someone knows what kind of component/widget/technique is needed to emulate the MSN (7.5) Options window behavior?
I mean, when you click any option in the listBox on the left, the groupBox of the right changes accordingly (with different set of options for each selected item).
I want to do a Configuration dialog like that and it seems not so obvious for me to figure out the best or smart way to do that.
Thanks in advance
Zopiro
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How to break long line of code into several lines of short codes like what one can do in C++?
Thanks!
Devin
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int my_very_long_variable_name = My_Very_Long_Method_Name(my_first_argument, my_second_argument, my_third_and_longest_argument, "some very long long string....");
Can be writen as well as
int my_very_long_variable_name = My_Very_Long_Method_Name(
my_first_argument,
my_second_argument,
my_third_and_longest_argument,
"some very long"+
" long string...."
);
btw, if you have a very long math expession, uualy is more useful to write it step by step (aoiding bugs is a must)
protected internal static readonly ... and I wish the list could continue ...
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<br />
int i;<br />
Form2 f2=new Form2();<br />
<br />
private void button1_Click(object sender, System.EventArgs e)<br />
{<br />
f2.Show();<br />
f2.textBox1.Text=i.ToString();<br />
loop();<br />
}<br />
private void loop()<br />
{<br />
for(i=1; i<1000000;i++)<br />
{<br />
f2.textBox1.Text=i.ToString();<br />
f2.Refresh();<br />
}<br />
<br />
}<br />
<br />
<br />
<br />
With above code, I want to let i show in the testbox1 of form2 while the interation in funcion loop in going on. When I run the program. at first it works, but after i get to around 10000, the form2 freezs,and it will not update the value of i. If I click the form. The form2 's text will show some thing like ( not responding).
How can I fix this problem?
Thank.
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Threads would solve your problems. Create the second form on a separate thread (and paint it - set the text property to aother controls) and all things should run smoothly.
protected internal static readonly ... and I wish the list could continue ...
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Thank you for your response.
I have never program in thread. can you please give me an example or a source online where i can find an example?
Thanks
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Search on CodeProject an example of SplashScreen (they are kind o the same, use threads in order to display dinmicaly changing data)
Implementing with threads your solution may not be the best method, but from what I can imagine this may work fine. If you want me to help you more specify in what circumstances you show the second form, and how long (until a button is pressed, or until a time is elapsed)
protected internal static readonly ... and I wish the list could continue ...
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Here's some code. No comments, though. I'm sick today and don't feel that loquacious. Hope it helps.
using System;
using System.Threading;
using System.Windows.Forms;
namespace Project1
{
public class MainForm : Form
{
private OtherForm otherForm;
public MainForm()
{
otherForm = new OtherForm();
Button b = new Button();
b.Text = "Click Me";
b.Click += new EventHandler( RunAThread );
Controls.Add( b );
}
private void RunAThread( object sender, EventArgs ea )
{
otherForm.Show();
ThreadWorker tw = new ThreadWorker( otherForm.tb, new OtherForm.UpdateText( otherForm.UpdateTextBoxText ) );
Thread t = new Thread( new ThreadStart( tw.RunAlotOfIterations ) );
t.IsBackground = true;
t.Start();
}
[STAThread]
public static void Main( string[] args )
{
Application.Run( new MainForm() );
}
}
public class OtherForm : Form
{
public TextBox tb;
public OtherForm()
{
tb = new TextBox();
tb.Dock = DockStyle.Fill;
Controls.Add( tb );
}
public delegate void UpdateText( string text );
public void UpdateTextBoxText( string text )
{
Controls[ 0 ].Text = text;
}
}
public class ThreadWorker
{
private Control c;
private OtherForm.UpdateText ut;
public ThreadWorker( Control target, OtherForm.UpdateText del )
{
c = target;
ut = del;
}
public void RunAlotOfIterations()
{
for( int i = 1; i < 1000000; i++ )
{
c.Invoke( ut, new object[] { i.ToString() } );
}
}
}
}
"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty
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In this case, launching another thread is overkill. All you need to do is let your app process the WM_PAINT messages it's getting when you call .Refresh()
private void loop()
{
for(i=1; i<1000000;i++)
{
f2.textBox1.Text=i.ToString();
f2.Refresh();
Application.DoEvents();
}
}
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have a data grid that is displaying data from a MSAccess Database. Using a oleDbAdapter. Everything works well with the datagrid, add/update/insert/delete, are all good when I type directly into a cell. Howevere, when I choose a value from a combo box, outside the datagrid, and press a button that changes a selected cell in the datagrid, the update to the database does not occur. I know it has something to do with typing directly into the cell versus just setting the cell equal to a value.
//This line of code successfully puts the data in the grid
dataGrid1[gRowSelected,4] = cmbGenre.Text;
//But the update of the DB does not happen, A restart of the app shows the previous data
oleDbDataAdapter1.Update(myDataSet);
myDataSet.AcceptChanges();
dataGrid1.Update();
does anyone know how I can get the data I put into the grid to get into the Database? Do I need to refresh that dataset from the datagrid? Is that possible? Any clues????
Thanks
AuZi2005
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