|
Hello Experts!!
i am making visible false after validating my login form and open MDI form.But i got problem is login form cant disappear.It shows in taskbar.what to do?
i am using following code for it
frmLogin login = new frmLogin();
login.Visible = false; //THIS CONDITION
MDIPROJECT mdi = new MDIPROJECT();
mdi.Show();
|
|
|
|
|
I suspect there is code you haven't included:
KIDYA wrote: frmLogin login = new frmLogin();
login.Visible = false; //THIS CONDITION
MDIPROJECT mdi = new MDIPROJECT();
mdi.Show();
Will not display your login form, on the display or in the taskbar. On it's own, setting the Visible property will not do anything useful - until you ask for
login.Show()
or
login.ShowDialog()
Check in your other code, and see where you are displaying the form.
No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.
This message is made of fully recyclable Zeros and Ones
|
|
|
|
|
Which one is your startup form, the Login form or the MDIParent form?? It should be your MDIParent, not the Login.
|
|
|
|
|
hi all
i am using vs.net 2005 c# window application to learn to make a crystal report which connect to a ms sql database programically
hence i tryed this code:
my_rp objRpt;
objRpt = new my_rp();
String ConnStr = "Data Source=com-DEV;Initial Catalog=DB;Persist Security Info=True;User ID=abc;Password=abc";
SqlConnection myConnection = new SqlConnection(ConnStr);
String Query1 = "SELECT [index], [Model name] FROM Valve";
SqlDataAdapter adapter = new SqlDataAdapter(Query1, ConnStr);
DataSet Ds = new DataSet();
adapter.Fill(Ds, "dt_my_project_table");
if (Ds.Tables[0].Rows.Count == 0)
{
MessageBox.Show("No data Found", "CrystalReportWithOracle");
return;
}
objRpt.SetDataSource(Ds);
CrystalDecisions.CrystalReports.Engine.TextObject root;
root = (CrystalDecisions.CrystalReports.Engine.TextObject)
objRpt.ReportDefinition.ReportObjects["TEST1"];
root.Text = "Sample Report By Using Data Table!!";
crystalReportViewer1.ReportSource = objRpt;
how ever the data doesnt show out, i created some break in the code and reliase that the Ds.Tables[0].Rows.Count have the data found in it meaning it works fine how ever the data just dont show out in the crystal report only the header does.
anyone know whats the problem please advice me please
|
|
|
|
|
Give me report showing fields then will tell u what to do?
|
|
|
|
|
i have verified that my dataset contains data
its just that the data is not being shown in the crystal report for some reason.
and yea i already made sure i have the field up in the report so they can get displayed
i also tryed to make a dummy report by dragging my database into the dataset and creating another report same thing happens the crystal report shows no data although i have comfirm that there is.
any one know if its a setting error, bug or something? please advice
|
|
|
|
|
new to tablet pc application. is it possible to get noncontionous regions on which i can ink on a single form. i need ascii representation of character followed by its glyph for all the characters on a single form.i want to define area for each character separately. the stroke for one region should not interfere with the ink area of other.
right now i m using groupbox as a control and line control dll to draw horizontal lines so as to draw glyph in defined area.
InkOverlay mInkoverlay;
mInkoverlay = new InkOverlay(groupBox1);
mInkoverlay.Enabled = true;
thanks in anticipation
|
|
|
|
|
I'm making a vs.net addin which has a custom treeview, in a custom toolwindow.
I'm trying to replicate some of the basic features of the solution-explorer treeview but i have come across a snag when trying to show a tooltip for a partially visible treenode, when my treeview control doesn't have focus. Basically ToolTip.Show(...) fails to show a tooltip when my treeview isn't focused.
vs.net can surprisingly do this in its solution-explorer treeview so long as vs.net has focus... it's treeview doesn't need focus. You can be typing away in the ide and mouse hover over a half visible file in the solution explorer and see its tooltip. I want that functionality for my treeview :P
|
|
|
|
|
Can you trap the mouseover event on the node (does the node have a mouseover event) even if the control is not selected? Then handle the tooltip manually.
If the node does not then use the treeview and hittest. Still it will be a lot of faffing about to get a tooltip.
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
yes in my derived treeview i override OnMouseMove and this code does seem to execute even if the control isnt focused... atleast the breakpoint fires when i slide the mouse over the non-focused control. It's just the call to toolTip.Show(...) which fails to display a tooltip when the control has no focus. hmm.
ok i checked out the Tooltip class with reflector and i see the problem. "IsWindowActive"... microsoft explicitly checks for being "active" before allowing a tooltip to show... i'll do more digging to see if their's an acceptable alternative to being focused.
//from .net framework ToolTip class
public void Show(string text, IWin32Window window, int x, int y)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
if (this.HasAllWindowsPermission && this.IsWindowActive(window))
{
NativeMethods.RECT rect = new NativeMethods.RECT();
UnsafeNativeMethods.GetWindowRect(new HandleRef(window, Control.GetSafeHandle(window)), ref rect);
int pointX = rect.left + x;
int pointY = rect.top + y;
this.SetTrackPosition(pointX, pointY);
this.SetTool(window, text, TipInfo.Type.Absolute, new Point(pointX, pointY));
}
}
|
|
|
|
|
Then you'll find there is something buried under NativeMethods.RECT that needs addressing, 2 weeks from now you will be pushing 1s and 0s at the hardware  .
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
ya... i could decompile tooltip... recompile without the offending check... or i can just let this one slide lol
|
|
|
|
|
I have a process, i can start, and hide working fine, but i want to read from the console program, when i runs, not after, i tried to run a timer, anbd read at the tick, but my program just crashes and when it not do, i get nothing at all.
startInfo= new ProcessStartInfo("cmd.exe");
startInfo.Arguments ="/C uus.exe "+ arg.ToString();
startInfo.RedirectStandardError = true;
startInfo.RedirectStandardOutput = true;
startInfo.UseShellExecute = false;
startInfo.CreateNoWindow = true;
this.timer1.Enabled=true;
this.listBox1.Items.Clear();
p= Process.Start(startInfo);
Application.DoEvents();
void Timer1Tick(object sender, EventArgs e)
{
string str="";
str=p.StandardOutput.ReadLine();
if(str != null)
{
this.Text=str.ToString();
this.listBox1.Items.Add(str);
}
Application.DoEvents();
}
So what do i do to solve this?
Update: I tried a solution i found now My program don't crash anymore, but it also don't recevie any data at all
proc.StartInfo.UseShellExecute=false;
proc.StartInfo.CreateNoWindow=true;
proc.StartInfo.RedirectStandardOutput=true;
proc.StartInfo.RedirectStandardError=true;
proc.StartInfo.FileName="uus.exe";
proc.StartInfo.Arguments=arg;
proc.OutputDataReceived += new System.Diagnostics.DataReceivedEventHandler(SortOutputHandler);
proc.Start();
proc.BeginOutputReadLine();
void SortOutputHandler(object o,System.Diagnostics.DataReceivedEventArgs e)
{
string str="";
string str2="";
str=e.Data.ToString();
if(str!=null && str!="")
{
this.listBox1.Items.Add(str.ToString());
this.Text=str.ToString();
}
str2=proc.StandardOutput.ReadLine();
if(str2!=null && str2!="")
{
this.lsw1.Items.Add(str2.ToString());
}
}
The program is a process whichs take some arguments, and if no error happends run and close is self, what i'am trying to do is run the process, read how long the process is done with the task, while it does the task not after, and write it in my program
some body have a working solution?
|
|
|
|
|
Hi,
there are several correct ways to read data from another process' output (and/or error) stream:
1.
read all at once from a stream as in string output = p.StandardOutput.ReadToEnd();. The main drawback is this only produces anything when the process p has finished.
2.
use a separate thread which synchronously reads the output/error stream (that is two threads if both streams are required)
3.
use the DataReceived event; you should not have Read calls in the handler!
MSDN says: The event is enabled during asynchronous read operations on StandardOutput. To start asynchronous read operations, you must redirect the StandardOutput stream of a Process, add your event handler to the OutputDataReceived event, and call BeginOutputReadLine. Thereafter, the OutputDataReceived event signals each time the process writes a line to the redirected StandardOutput stream, until the process exits or calls CancelOutputRead.
BTW: you have way too many ToString() calls in your code; it does not make sense at all to call ToString() on a string object; e.g. DataReceivedEventArgs.Data is a string all by itself.
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
|
1. If you have read my post, you will know that solution wont work, that it reads after, not while.
2. I dont know here what you mean.
3. Ise'nt it what i have tried in the lower code? if, I get no data at all.
|
|
|
|
|
thomaxz.tc wrote: Ise'nt it what i have tried in the lower code?
No
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
|
Then i not sure what you mean?
|
|
|
|
|
Hi,
1.
Why do you ignore the documentation, it says:
The event is enabled during asynchronous read operations on StandardOutput. To start asynchronous read operations, you must redirect the StandardOutput stream of a Process, add your event handler to the OutputDataReceived event, and call BeginOutputReadLine. Thereafter, the OutputDataReceived event signals each time the process writes a line to the redirected StandardOutput stream, until the process exits or calls CancelOutputRead.
2.
The DataReceived event executes on a ThreadPool thread, not on the main thread; so you are not allowed to touch any Control, however you could use Console.WriteLine() for debugging purposes. To touch Controls, you need the Control.InvokeRequired/Control.Invoke pattern.
BTW: Setting Control.CheckForIllegalCrossThreadCalls false is NOT the solution.
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
|
>1.
>Why do you ignore the documentation, it says:
>The event is enabled during asynchronous read operations on StandardOutput.
>To start asynchronous read operations, you must redirect the StandardOutput stream of a Process,
As in my lower code
proc.StartInfo.RedirectStandardOutput=true;
Ise'nt that an redirect?
>add your event handler to the OutputDataReceived event
proc.OutputDataReceived += new System.Diagnostics.DataReceivedEventHandler(SortOutputHandler);
Ise'nt that an event handler for the OuptuDataRecevide?
>And call BeginOutputReadLine.
proc.Start();
proc.BeginOutputReadLine();
Ise'nt that a Call to BeginOutputReadLine?
>Thereafter, the OutputDataReceived event signals each time the process writes a line to the >redirected StandardOutput stream, until the process exits or calls CancelOutputRead.
I still get no data.
2.
>The DataReceived event executes on a ThreadPool thread, not on the main thread; so you are not >allowed to touch any Control, however you could use Console.WriteLine() for debugging purposes. To >touch Controls, you need the Control.InvokeRequired/Control.Invoke pattern.
>BTW: Setting Control.CheckForIllegalCrossThreadCalls false is NOT the solution.
OK? all the other time i have code treate and i wasen allowed i was getting a cross thread error, with i don't do here.
futher more have i change my code af bit, do reflect invoek
private delegate void TextAdderDelegate(string str);
void TextAdder(string str)
{
if(this.lsw1.InvokeRequired==true)
{
Invoke(new TextAdderDelegate(TextAdder),new object[] {str});
}
else
{
this.lsw1.Items.Add(str);
}
}
void SortOutputHandler(object o,System.Diagnostics.DataReceivedEventArgs e)
{
string str="";
if(e!=null)
{
if(e.Data!=null)
{
str=e.Data.ToString();
}
}
TextAdder(str);
}
But I still not get any data.
And when i make a breakpoint, it only runs when the process finished.
|
|
|
|
|
hi
i want to load a lot of images to the memory.
of course every bitmap in the memory takes about 10 times more then in the file;
so (if there is no other way) i'm loading the image as a byte array:
private byte[] FileToByteArray (string path)
{
byte[] bytes = null;
using (System.IO.Stream stream = File.OpenRead(path))
{
using (System.IO.BinaryReader reader = new BinaryReader(stream))
{
bytes = reader.ReadBytes((int)reader.BaseStream.Length);
}
}
return bytes;
}
and store it into a byte array variable.
when i need the image i use:
private Image ByteArrayToImage(byte[] byteArrayIn)
{
if (byteArrayIn == null)
return null;
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
so far so good, the problem is if the image need to be change i send it to a function and get new bitmap, now i want to save it back to byte array, so if i use:
private byte[] ImageToByteArray(System.Drawing.Image imageIn)
{
if (imageIn == null)
return null;
MemoryStream ms = new MemoryStream();
imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Png);
imageIn.Dispose();
return ms.ToArray();
}
i get a byte array that is about 10 times bigger. so how can i get a smaller byte array?
|
|
|
|
|
Hi,
several remarks:
1.
Image size (the file or memory footprint) depends on the image format; e.g. ImageFormat.Jpeg would be more economical than ImageFormat.Png due to the compression used.
2.
When a class offers a public Dispose() method, you should call it as soon as you are done with the object. MemoryStream is one of those.
3.
you must be aware that, the way you do things, causes each image to exist several times in memory, and being copied from one format to another: byte[], MemoryStream, Image
4.
are you sure you need byte arrays at all? maybe you could perform image operations on the MemoryStream directly. OTOH you might consider using a Bitmap constructor that builds a Bitmap from an existing array, without copying (see the ones with an IntPtr parameter)
5.
assuming your images/streams/arrays each take more than some 80KB, they may all end up in the "huge-object-heap" which does not have compaction; as a result after several operations you may run out of memory although your memory-in-use count may well be below your working set.
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
|
Luc Pattyn wrote: ImageFormat.Jpeg would be more economical than ImageFormat.Png due to the compression used.
Actually you don't know that for sure, it depends on the images.. what if they're diagrams or pictures of text? The OP didn't say..
|
|
|
|
|
The OP stated "every bitmap in the memory takes about 10 times more then in the file" so I assume compression has been doing a fine job on his original images and stands a good chance of doing the same on the final images.
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
|
Fair enough, but, who knows right? PNGOUT-ed PNGs can be a lot smaller than PNGs compressed by the .NET PNG compressor..
|
|
|
|
|
given time the OP will tell.
Luc Pattyn [Forum Guidelines] [My Articles]
DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
