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Hi
I want to filter input data in DatagridView control. For example preventing entering numeric values in 'Name column' or preventing entering alphabetic values in 'Pricre column'. I mean i want to lock keyboard's number keys when user focuses on cell that should enter "Customer Name" avoiding entering wrong data.
Tanx
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I think that using generic columns you can't control it. You must create your own custom column (inherited from TextboxColumn) and implement your validation
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i have a toolstrip in my form and my form is scrollable but when i scroll the page toolstrip's location changed i want always toolstrip at the top of page
how can i do it ?
Thanks
MHF
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Set its dock property to TOP
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ok i set it but when i scroll the page to down the toolstrip go away from the form
i want always tooltrip is in the form
MHf
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oh!
if you want keep it visible all the time then you can achieve it by two ways either take two panels add your controls on different panels or change
its location with the scrolled margin
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You have to move the ToolStip out of the control that is scrollable.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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I had write this code
for (int i = 0; i < totalEquipment; i++)
try
{
for (int j = 0; j < sEquip[index].index; j++)
{
try
{
...
bar[j].Size = new Size(length,20);
bar[j].BackColor = System.Drawing.Color.Blue;
bar[j].Location = new Point(xPosition,yPosition);
this.Controls.Add(bar[j]);
...
}
catch (Exception ex)
{
throw new Exception(ex.Message + " " + ex.StackTrace);
}
finally
{
xPosition += length;
}
}
}
catch (Exception ex)
{
throw new Exception(ex.Message + " " + ex.StackTrace);
}
finally
{
yPosition -= range;
}
}
}
The problem is this part which it keep add panel to window form without stoping like non stop looping. How can i stop this error?
try
{
...
bar[j].Size = new Size(length,20);
bar[j].BackColor = System.Drawing.Color.Blue;
bar[j].Location = new Point(xPosition,yPosition);
this.Controls.Add(bar[j]);
...
}
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There is nothing in that code that would create a loop.
I assume that ... means that there are more code in the block, what does that code contain?
---
single minded; short sighted; long gone;
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The code contain an array of panel that will be add to window form. It will be display according to the number of input. The problem is the panel will be display but it keep blinking during runtime meaning that it generate too many panel...
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Why all the try statements ?
You need to step through the code to see what is going on.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"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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Hi,
I am having a problem decrypting a des file or well in this test case a des string. I'm not sure if my error is in the Encrypting or the Decrypting so i will post code for both. This is what i am calling.
<br />
string Key = Security.CreateKey();<br />
Console.WriteLine(Encoding.ASCII.GetString(Security.Decrypt(Security.Encrypt(Encoding.ASCII.GetBytes("Test"), Key), Key)));<br />
But giberish is returned rather than "Test"... Obviously encoding and decoding are using the same key so i'm not exactlly sure is going on  . Any help anyone could offer would be GREATLY appreciated.
Thanks in advance!
<br />
public string CreateKey()<br />
{<br />
DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();<br />
return ASCIIEncoding.ASCII.GetString(desCrypto.Key);<br />
}<br />
<br />
public byte[] Encrypt (byte[] Data, string Key)<br />
{<br />
MemoryStream MemStream = new MemoryStream();<br />
DESCryptoServiceProvider Des = new DESCryptoServiceProvider();<br />
SetDesKey(Des, Key);<br />
<br />
ICryptoTransform DesEncrypt = Des.CreateEncryptor();<br />
CryptoStream CryptStream = new CryptoStream(MemStream, DesEncrypt, CryptoStreamMode.Write);<br />
CryptStream.Write(Data, 0, Data.Length);<br />
CryptStream.Close();<br />
<br />
return MemStream.ToArray();<br />
}<br />
<br />
public byte[] Decrypt(byte[] Data, string Key)<br />
{<br />
byte[] returnContainer;<br />
MemoryStream MemStream = new MemoryStream(Data);<br />
<br />
DESCryptoServiceProvider Des = new DESCryptoServiceProvider();<br />
SetDesKey(Des, Key);<br />
<br />
ICryptoTransform DesEncrypt = Des.CreateEncryptor();<br />
CryptoStream CryptStream = new CryptoStream(MemStream, DesEncrypt, CryptoStreamMode.Read);<br />
<br />
returnContainer = new byte[MemStream.Length];<br />
CryptStream.Read(returnContainer, 0, returnContainer.Length);<br />
CryptStream.Close();<br />
<br />
return returnContainer;<br />
}<br />
<br />
private void SetDesKey(DESCryptoServiceProvider DESProvider, String password)<br />
{<br />
int i;<br />
Byte[] bytePassword;<br />
bytePassword = (new ASCIIEncoding()).GetBytes(password);<br />
Byte[] passwordHash;<br />
SHA1Managed SHhash = new SHA1Managed();<br />
<br />
passwordHash = SHhash.ComputeHash(bytePassword);<br />
<br />
Byte[] pwh = new Byte[8];<br />
for (i = 0; i < 8; i++)<br />
pwh[i] = passwordHash[i];<br />
<br />
Byte[] pwiv = new Byte[8];<br />
for (int j = 7; i < 16; i++)<br />
pwiv[j] = passwordHash[j + 7];<br />
<br />
DESProvider.Key = pwh;<br />
DESProvider.IV = pwiv;<br />
}<br />
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In the Decrypt function, you need to call CreateDecryptor instead of CreateEncryptor.
![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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OMG ok... i kinda feel dumb now.. *sigh* i guess it happends...
thank you very much dominik.
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Guffa:
In response to the following response, I need to ask for some further input. I was able to successfully cause a Timer control to trigger when the dragged control was dropped. However, the dragDropTimer_Tick event cannot retrieve any control so that it could modify its location.
Here is what I have so far:
private static void ProvideDragPathReturnToParent(Control ctrl, int intX_end, int intY_end,
int intX_start, int intY_start)
{
Timer dragDropTimer = new Timer();
dragDropTimer.Enabled = true;
dragDropTimer.Interval = 2;
dragDropTimer.Tick +=new EventHandler(dragDropTimer_Tick);
dragDropTimer.Start();
}
private static void dragDropTimer_Tick(object sender, System.EventArgs e)
{
int x = 0, y = 0;
for (int index = 0; index <= 64; index++)
{
x = pt_start.X + (intX_end - pt_start.X) * index / 64;
y = pt_start.Y + (intY_end - pt_start.Y) * index / 64;
}
MessageBox.Show("Hello");
}
The pt_start System.Drawing.Point was moved to become a public variable in the DragDropHandler. The problem is that I cannot access the control itself because the dragDropTimer_tick event handler has a sender object but it is not the same type as the control being dragged or dropped.
How would I access the control itself to implement your suggestion? The timer event handler does actually show MessageBoxes saying the word "Hello" every interval. Please provide additional information.
P.S. Others may respond as well.
*****************Guffa's Message**********
We start with this:
new_phoenix wrote:
and how would a timer be used to get the form to redraw itself?
If you use a timer to trigger the movement of the control, the main message pump would handle messages in between the timer events. If you just change the location of the control, both the control and the previous area of the control will be invalidated. This creates messages that will be handled by the message pump. The message pump will call the Paint event of the control and the form, which will repaint the control and the part of the form that was invalidated.
new_phoenix wrote:
How could it be done in a loop
The x position of a point on the line can be interpolated like this:
x = startX + (endX - startX) * index / 64
where index is the index of the point from 0 to 64.
The y position can be calculated in the same way.
You don't even have to create an array of points, you can just calculate the position directly in the timer event.
---
single minded; short sighted; long gone;
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The sender object in your dragDropTimer_Tick event is going to be the timer, try creating a public variable of type control and setting it to the calling control in your ProvideDragPathReturnToParent event and use that variable in your dragDropTimer_Tick event
Hope that helps
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Please keep the responses in the same thread.
---
single minded; short sighted; long gone;
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How to change the wallpaper on my desktop.
C#
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http://www.codeproject.com/info/search.asp?cats=2&cats=3&cats=4&cats=5&cats=6&cats=8&cats=9&searchkw=wallpaper&Submit1=Search&author=&sd=15+Nov+1999&ed=11+Mar+2007
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I declare "private System.Windows.Forms.Panel mypanel;" in window form to get a panel name my panel.
Can i declare "System.Windows.Forms.Panel [] mypanel;" to get an array of panel because i want to generate couple of mypanel during runtime...
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Yes you can, you just have to remember to new up each panel in the array prior to use...
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Thanks for the useful information
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However, it's not really going to work. To do this, you need when you create each Panel, pass it into the forms Controls collection, and it's often easier just to create Panels and find them from the Controls collection.
foreach(Control c in Controls)
{
if (c is Panel)
{
}
// OR
Panel p = c as Panel;
if (p != null)
{
}
}
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"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 want to write a small vocabulary trainer (EN <=> Spanish).
Now I need to know, if two strings are similar. When the trainer ask you, what the meaning of "veinte" is, and the user writes "tewnty" instead of "twenty" the application should only remark that there is a small mistake in the input. When he writes a total different word (e.g. wine) then the trainer should say, that there is a mistake in the input.
Know anyone of you a good class, which compares two strings on similarities? The class should detect if there is a letter missing or a letter too much (or 2 letters are flipped).
Till now I just found classes, which compares complete texts and which say that a line in text A is different to a line in text B.
Bye
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You'd have to write something to do this. A starting point may be to sort both strings alphabetically, and then compare them, to work out if you only have an error of letter order. Then you can walk them character by character, to work out a list of letters that were added, and that were missing, if the wrong letters were also used.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"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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