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The "DataSourceUpdateMode.OnPropertyChanged" is a flag that sends button1's "Enabled" value to the current record's "BoolValue" field.
It does not tell the datasource to send updates to the control.
What you need to do is force the binding context of the button to update it's index. This will cause: button1 to read the changed value.
The mind is like a parachute. It doesn’t work unless it’s open.
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Hi
I am using dataset control for crystal reports inside the dataset i type tables and then pass it to thte crystal report.
Using this way i have a feeling that if i have 300 reports the dataset control will definately become heavy and the application will get slow.
My question is:
1) Is there any other way of doing it using untyped data set without using the typed dataset?
2) Is there a way i can use it without a dataset control?
Regards
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You can "pull" data directly from source without using needing to use dataset.
You should only passing the datatables that are needed for each report, so whether 3 or 300 reports it should not matter, unless you are talking about generating 300 reports all at once.
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you are right but what i want to do here is:
1) Not to use the dataset control in which i create tables for each report.
if i create a datatable it is not accepting to through values in the crystalreport datasource.
However all the columns are the same on both sides.
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You're near bankrupt, aren't you? I can tell by the way that you're trying to save money on advertising 
I are Troll 
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Please read this[^] guideline before you post anything in the thread.
If you want to put any product world wide then post the article in
"Product Showcase" section of code project.
HTH
Jinal Desai - LIVE
Experience is mother of sage....
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You are not even on the right website(forget the forum).
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
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I have a DataGridView in a windows form that I need to be able to make the datagridviewbutton visible or invisible depending on the value of another column. I can not figure out how to make this happen when I bind the datatable to the datagridview.
Any help would be appreciated.
Thanks
John
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For that you need to use RowDataBound event. Try following code.
protected void MyDataGrid_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (condition)
{
(e.Row.FindControl("buttonid") as Button).Enabled = false;
}
}
}
HTH
Jinal Desai - LIVE
Experience is mother of sage....
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hi man,
this could be a possible solution but never tested..
In the CellValueChanged event you have to check your specified cell against your condition and than try:
<br />
dataGridView1.Rows[rowIndex].Cells[buttonCell].ReadOnly = true;<br />
or
<br />
dataGridView1.Rows[rowIndex].Cells[buttonCell].Frozen = true;<br />
hope i could help 
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Hey - we're looking at trying to implement a T9-based predictive text capability (like on your cell phone/PDA) into our Windows forms application (this is running on a standard Windows/embedded environment, NOT on a smart phone). Has anyone seen or worked with anything like this in the past?
Cheers,
Chris
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For that you need to do following.
1. Maintain one dictionary which will serve as base for auto suggestion.
2. Bind that dictionary with your textbox.
3. Track keypress event of your textbox and suggest world if it is starting
from the character user enters.
That's All.
HTH
Jinal Desai - LIVE
Experience is mother of sage....
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Thanks for the reply. However, I'm not sure if you're following one of the key points I was trying to accomplish - T9. I'm not working by standard letter entry, but rather by T9 entry (or the newer XT9). In the very least this would involve adding the equivalent T9 values for each word in the dictionary, but it still wouldn't account for word usage/popularity. Obviously there are ways that this can be coded completely from scratch, but I wanted to first see if anyone was doing something similar using an already establish method, API, etc.
Thanks again.
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Yes definitely possible, though probably not entirely in .NET, and don't think there are API beside the standard Win32 API, and you got to code most of the libraries.
You'll need a light and efficient database for the dictionary, an algorithm to retrieve the words fast, an algorithm to account for the most recent used words, adding and removing words from the dictionary.
You'll need some way to hook the keypress, and sending the character or control characters (backspace, etc) to the control.
Did a Palm version for a friend's company for the keyboard, they did the windows mobile version using C++. Though without much capital, the product is currently sort of dead. 
http://www.osnews.com/story/15389/Review-TenGO-2.0-and-TenGO-Thumb[^]
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G-Tek wrote: Has anyone seen or worked with anything like this in the past?
Not T9, but been playing with something similar. Kinda started with a Wiktionary-download, gives you a decent dictionary. Once that was in place, started fetching websites to do a statistical analysis.
Read a few sites in a loop (of the correct target-audience) and mark how often a word follows the previous word. Thus resulted in a crash of my machine
Filtered out all noise-words for the analysis, as there's a lot of words that might follow the word "this". The remark on the target-audience would be important because "this" often has a different meaning on the CodeProject-site than in normal conversation.
..and that's when I stopped playing with it, my harddisk isn't that large. You wouldn't need the complete resultset to give decent options as a prediction; only the top 5000 or so. Still, sounds like a lot of work, and the method that I described here is probably one of the less efficient ways to do it.
I are Troll
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I'm trying to do something that should be simple. We have a DRM encripted WMV file, and we need to control the size of the activation window that comes up while the license is being verified. I've seen files that do this, but we haven't been able to find a way. Apparently this is set by Windows Media Player. How do we tell WMP what size window we want?
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tjeffries wrote: We have a DRM encripted WMV file, and we need to control the size of the activation window that comes up while the license is being verified. I've seen files that do this, but we haven't been able to find a way. Apparently this is set by Windows Media Player. How do we tell WMP what size window we want?
You could try using the WinAPI, using FindWindow and SendMessage to set the appropriate size.
I are Troll
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The following code is meant to draw a grid and is a custom control (one that can be dragged from the toolbox)
:
public partial class UserControl1 : UserControl
{
public UserControl1()
{
InitializeComponent();
AutoScroll = true;
}
Point _rowColumn;
Point _widthHeight;
Rectangle[,] _bound;
public void Init(int x, int y, int width, int height)
{
SetAutoSizeMode(AutoSizeMode.GrowAndShrink);
_rowColumn = new Point(x, y);
_bound = new Rectangle[x, y];
_widthHeight = new Point(width, height);
_drawArea = new Bitmap(Width, Height);
LoadTiles();
_loaded = true;
AutoScrollMinSize = new Size(x * width, y * height);
}
void LoadTiles()
{
for (int x = 0; x < _rowColumn.X; x++)
{
for (int y = 0; y < _rowColumn.Y; y++)
{
_bound[x, y] = new Rectangle(x* _widthHeight.X, y*_widthHeight.Y, _widthHeight.X, _widthHeight.Y);
}
}
}
Bitmap _drawArea;
bool _loaded = false;
void DrawGrid()
{
Graphics gfx = Graphics.FromImage(_drawArea);
gfx.Clear(Color.White);
Pen pen = new Pen(Color.Black,1);
foreach (Rectangle r in _bound)
{
gfx.DrawRectangle(pen, r);
}
gfx.Dispose();
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.Clear(Color.White);
Matrix mx = new Matrix(1, 0, 0, 1, AutoScrollPosition.X, AutoScrollPosition.Y);
e.Graphics.Transform = mx;
e.Graphics.PageUnit = GraphicsUnit.Pixel;
if (!_loaded) return;
DrawGrid();
Graphics gfx = e.Graphics;
gfx.DrawImage(_drawArea, -AutoScrollPosition.X, -AutoScrollPosition.Y, _drawArea.Width, _drawArea.Height);
gfx.Dispose();
}
private void UserControl1_Paint(object sender, PaintEventArgs e)
{
}
}
It displays everything but for some reason when I scroll the lines distort!
Here is a link of what it looks like without scrolling (what I would like it to look like)
http://img130.imageshack.us/i/should.png/
Here is a link to what it looks like when scrolled:
http://img139.imageshack.us/i/isnt.png/[^]
The control has no embedded stuff (ie the auto scroll is applied directly to the blank box that appears by default when creating a new control).
Thanks ! 
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the problem with AutoScroll is Windows, while scrolling, will copy and move that part of the painting that it can reuse, and order your Paint handler to only paint the new stuff, the part that becomes visible by scrolling. And that interferes with your intentions.
Furthermore, your code is much too complex; you are using an image, there is no need for, nor advantage in, doing that. Here is a simple example that works well; I use a specialized panel to get double-buffering, and I invalidate the (entire) panel when scrolling, forcing an all-paint, no-copy approach.
Panel p;
int nHor=40;
int nVert=10;
int wid=20;
int hei=20;
public void Demo() {
Form f=new Form();
f.Bounds=new Rectangle(0, 0, 500, 500);
p=new UserDrawnPanel();
p.Bounds=new Rectangle(20, 20, 400, 400);
p.AutoScroll=true;
p.AutoScrollMinSize=new Size(nHor*wid+10, nVert*hei+10);
p.BackColor=Color.White;
p.Paint+=new PaintEventHandler(p_Paint);
p.Scroll+=new ScrollEventHandler(p_Scroll);
f.Controls.Add(p);
f.Show();
}
void p_Scroll(object sender, ScrollEventArgs e) {
log("Scroll="+e.NewValue);
p.Invalidate();
}
void p_Paint(object sender, PaintEventArgs e) {
Graphics g=e.Graphics;
log("ClipRectangle="+e.ClipRectangle);
log("AutoScrollPosition="+p.AutoScrollPosition);
g.TranslateTransform(p.AutoScrollPosition.X, p.AutoScrollPosition.Y);
for (int y=0; y<=nVert; y++) g.DrawLine(Pens.Black, 0, y*hei, nHor*wid, y*hei);
for (int x=0; x<=nHor ; x++) g.DrawLine(Pens.Black, x*wid, 0, x*wid, nVert*hei);
}
class UserDrawnPanel : Panel {
public UserDrawnPanel() {
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
}
}
BTW: you can safely ignore the log statements.
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Thanks again it works well
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you're welcome.
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 hi all, How to create xmpp client using C#? I want to develop an application that will chat with xmpp server like jabber etc? 
it's manjeet!
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choose a single forum to ask your question, and stick to it.
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Personally I think using smiley's randomly is just damn annoying.
Anyway this may be of use, http://tinyurl.com/28nfze4[^]
Programming is 10% science, 20% ingenuity, and 70% getting the ingenuity to work with the science.
WYSIWYMGIYRRLAAGW: What You See Is What You Might Get If You’re Really Really Lucky And All Goes Well.
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