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I did.
- I love D-flat!
- Need. More. Code.
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Hi. I need to take a screen shot of a control - the control is plotterForm.expressionPlotter. I am using the following code:
<br />
private Bitmap GetBitmap()<br />
{<br />
Bitmap bmp = new Bitmap(plotterForm.expressionPlotter.Width, plotterForm.expressionPlotter.Height);<br />
Graphics g = Graphics.FromImage(bmp);<br />
Screen screen = Screen.FromControl(plotterForm.expressionPlotter);<br />
g.CopyFromScreen(new Point(screen.Bounds.Location.X, screen.Bounds.Location.Y), Point.Empty, plotterForm.expressionPlotter.Size);<br />
return bmp;<br />
}
The problem is that the location of which the screen shot is always the upper left corner of the desktop, not the upper left corner of the control.
In other words the screen.Bounds.Location is a point which is always (0;0). When i added MessageBox.Show(screen.ToString()); i received the following message:
Screen[Bounds={X=0,Y=0,Width=1024,Height=768} WorkingArea={X=0,Y=0,Width=1024,Height=739} Primary=True DeviceName=\\.\DISPLAY1
As if the screen hasn't captured the control. How can i fix this???
Still learning...
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I realized that the Screen.FromControl is something entirely different from the thing i expected! But here comes another question - how can i find the location of a control in relation to the desktop?
Still learning...
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Use...
PointToScreen(control.Location);
Matthew Butler
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Can you not just use DrawToBitmap as in:
int height = plotterForm.expressionPlotter.Height;
int width = plotterForm.expressionPlotter.Width;
Bitmap bmp = new Bitmap(width, height);
plotterForm.expressionPlotter.DrawToBitmap(bmp, new Rectangle(0,0,width,height));
Because if you could i imagine it will be much easier.
My current favourite word is: Nipple!
-SK Genius
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I changed the code of the project a little bit and the control which i want to capture is a panel. The panel has a written text using the DrawString method of the Graphics class.The screen shot is stored in the clipboard. When i take a screen shot using DrawToBitmap , when i paste the image in paint it appears, but the text isn't there.
The taken screen shot[^]
The image as it should be[^]
Why doesn't the DrawToBitmap method capture the text???
Still learning...
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i don't know, i had trouble with a textbox not drawing the text when i used DrawToBitmap. Then all of a sudden it just started working. and i'm not sure why/
My current favourite word is: Nipple!
-SK Genius
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Take a screen shot of the whole screen and then use an image editor?
Or, what I did was write a simple applet that I can position over the section of the screen I want to capture and have do the capture.
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Im 99% sure that the DrawToBitmap method will invoke the OnPaint method on the control and pass a graphics object containing the bitmap.
so if you draw the text outside of the OnPaint method, that code will not be triggered when calling DrawToBitmap.
How are you drawing the text?
Control.CreateGraphics?
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This is how things are:
I have created a control - ExpressionPlotter. It is used to plot math graphs - they are drawn on the control. The control has a panel which contains the graphs' information. In the OnPaint method of the ExpressionPlotter is the method which draws the text - DisplayExpressionsText. In DisplayExpressionsText the panel is sized according to the text and then in the drawing of the text the method panel.CreateGraphics is used to obtain the Graphics class. When it comes to the screen shot the DrawToBitmap is called for the ExpressionPlotter control.
I tried to draw the text in the Paint event of the panel, but when i started the program, the panel didn't show.
Still learning...
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I did it! I moved the resizing of the panel to the OnPaint. Then i moved the drawing of the text to the Paint event of the panel. When i want to draw the text now i only have to Refresh() the panel. 
Still learning...
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nike_arh wrote: in the drawing of the text the method panel.CreateGraphics is used to obtain the Graphics class.
That's your problem. That means that you are always drawing the text on the screen. Use the Graphics object that is supplied in the event arguments to the Paint event.
Despite everything, the person most likely to be fooling you next is yourself.
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Take a look at my article clickety in which I cover basic screen capture as well as capturing a specific area of the screen.
The source code is available for download from the article as well.
Regards
Guy
You always pass failure on the way to success.
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When I open report by click button event - on the first time it opens, but on the second time (when I close report and open again), app breaks and appears error message:
System.InvalidOperationException was unhandled
Message="Invoke or BeginInvoke cannot be called on a control until the window handle has been created."
Source="System.Windows.Forms"
StackTrace:
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.BeginInvoke(Delegate method, Object[] args)
at Microsoft.Reporting.WinForms.ReportViewer.OnRenderingComplete(ProcessThreadResult result, PostRenderArgs data)
at Microsoft.Reporting.WinForms.ProcessThreadArg.OnComplete(ProcessThreadResult result)
at Microsoft.Reporting.WinForms.ProcessingThread.ProcessThreadMain(Object arg)
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart(Object obj)
I was not use threads and I cannot locate cause of error.
Thank you for any help.
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Thank you for sharing the exception. Is there some code that goes with it?
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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Thank you for answering. The main part report's code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;
using System.IO;
using System.Collections;
using System.Configuration;
using System.Management;
namespace DatabaseAccessWithADONET
{
public partial class ReportViewerFormIzv : Form
{
private static string ConStr =
ConfigurationManager.ConnectionStrings["DatabaseAccessWithADONET.Properties.Settings.PersonDatabaseConnectionString"].ConnectionString;
BindingManagerBase bindManager;
private bool PrintLayout = true;
bool loaded = false;
private CustomReportViewerMessages customMessages = null;
int current,max,tip;
public ReportViewerFormIzv()
{
InitializeComponent();
customizeReportViewer();
this.bindManager = this.BindingContext[this.cash.vReportBill, "IDBill"];
current = 0; tip = 0;
}
public void InitializeReport(string formName, string reportDisplayName, string reportPath, ReportDataSource reportDataSource)
{
this.Text = formName;
this.reportViewer.Reset();
this.reportViewer.LocalReport.DisplayName = reportDisplayName;
this.reportViewer.DocumentMapCollapsed = true;
this.reportViewer.LocalReport.ReportPath = reportPath;
this.reportViewer.Messages = this.customMessages;
this.reportViewer.LocalReport.DataSources.Add(reportDataSource);
this.reportViewer.RefreshReport();
}
private void reportViewer_RenderingComplete(object sender, RenderingCompleteEventArgs e)
{
if (!loaded)
{
this.reportViewer.SetDisplayMode(Microsoft.Reporting.WinForms.DisplayMode.PrintLayout);
this.reportViewer.ZoomMode = Microsoft.Reporting.WinForms.ZoomMode.FullPage;
loaded = true;
}
switch (tip)
{
case 0:
this.reportViewer.LocalReport.DisplayName = "Cash bill "+ cmbBon.Text;
break;
case 1:
this.reportViewer.LocalReport.DisplayName = "Cheque bill " + cmbBon.Text;
break;
case 2:
this.reportViewer.LocalReport.DisplayName = "Sell Products " + cmbDate.Text.Replace(':','.');
break;
default: break;
}
}
private void ReportViewerForm_Load(object sender, EventArgs e)
{
using (SqlConnection veza = new SqlConnection(ConStr))
{
veza.Open();
SqlDataAdapter da = new SqlDataAdapter("Select * from vReportProduct order by Date desc", veza);
da.Fill(this.cash.vReportProduct);
vReportProductBindingSource.Sort = "Date DESC";
}
this.ReportProductTableAdapter.Fill(this.cash.ReportProduct);
cash.ReportBill.AcceptChanges();
using (SqlConnection veza = new SqlConnection(ConStr))
{
SemiQuery sq = new SemiQuery();
veza.Open();
SqlDataAdapter da = new SqlDataAdapter("Select * from vReportBill where Tip=0 order by Date desc", veza);
cash.vReportBill.Clear();
da.Fill(this.cash.vReportBill);
max = cash.vReportBill.Rows.Count;
tip = 0;
DataSet ds = new DataSet();
string reportSourceFile = sq.getProjectSourcePath() + @"\ReportGot.rdlc";
SqlDataAdapter dak;
if (cash.vReportBill.Rows.Count > 0)
{
dak = new SqlDataAdapter("SELECT * FROM ReportBill where IDBill=" +
cash.vReportBill.Rows[current]["IDBill"].ToString() + " order by Date desc", veza);
}
else
{
dak = new SqlDataAdapter("SELECT * FROM ReportBill where IDBill=0", veza);
}
dak.Fill(ds);
InitializeReport("Reports", "Cash Bill", reportSourceFile, new ReportDataSource("Cash_Cash", ds.Tables[0]));
this.bindingNavigator1.BindingSource = this.vReportBillBindingSource;
cmbBon.Visible = true;
lblBon.Visible = true;
cmbDate.DataSource = vReportBillBindingSource;
cmbDate.ValueMember = "IDBill";
cmbDate.DisplayMember = "Date";
this.cmbDate.FormatString = "g";
}
outlookBar1.SelectedButton = outlookBar1.Buttons[0];
panel1.Visible = true;
loaded = true;
this.reportViewer.RenderingComplete += new
Microsoft.Reporting.WinForms.RenderingCompleteEventHandler(this.reportViewer_RenderingComplete);
this.reportViewer.SetDisplayMode(Microsoft.Reporting.WinForms.DisplayMode.PrintLayout);
this.reportViewer.ZoomMode = Microsoft.Reporting.WinForms.ZoomMode.FullPage;
this.WindowState = FormWindowState.Maximized;
max = cash.vReportBill.Count;
}
}
}
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Hi,
I don't see any Invoke() or BeginInvoke(), and I don't see a button click handler either.
if you want effective help, show the relevant code, and use PRE tags. Read my sig.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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private void btnReport_Click(object sender, EventArgs e)
{
string reportSourceFile = getProjectSourcePath() + @"\ReportGot.rdlc";
ReportViewerFormIzv f = new ReportViewerFormIzv();
SqlConnection mConnection = new SqlConnection(ConStr);
SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM ReportBill", mConnection);
DataSet ds = new DataSet();
da.Fill(ds);
f.InitializeReport("Reports", "Bill", reportSourceFile, new ReportDataSource("Cash_Cash", ds.Tables[0]));
f.Show();
}
And I nowhere use any Invoke() or BeginInvoke(). Whole code is pretty long for placing here.
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Hi,
this may not be easy to locate.
The Invoke/BeginInvoke might not be yours; the ThreadStart probably is; and the
RenderingComplete must be yours.
I suggest you look at (all) the RenderingComplete handlers, and insert a try-catch block
in each of them, showing the entire exception if and when it occurs.
Use the debug build, watch for line numbers; tell Visual to always show line numbers.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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In my case, this error was caused because of an internal problem of the Reportviewer control, as the report rendering seems to be done by a separate thread.
Make sure that the "RefreshReport()" method is called only and just only when all the involved forms, controls, usercontrols, etc. are successfully initializated. In my case, I've called it on the "Shown" event of the ReportViewer's container form.
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Hey Guys, Gals.
The following function I am quite stuck on... and hope you are able to help or provide some form of direction.
Basically I have been able to gather "logical drive details" about connected storage, however, with regards to the Serial Number, all I can acquire is the Volume Number, which is not unique to the physical hard drive itself.
I realise that in order to acquire the manufactures serial number I need to utilise the Win32_PhysicalMedia Class, (link below), however I haven't got the foggiest with whats going wrong
Does anyone have any ideas, code example that actually works?
I am using Vista or XP Professional, Visual Studio 2008.
This is what I have so far....
ManagementObjectSearcher Serial = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia")
foreach (ManagementObject Serials in Serial.Get()
{ combo_box.Items.Add(Serials["SerialNumber"].ToString()); }
Furthermore, the error I get is: NullReferenceException was unhandled, object reference not set to an instance of an object? Use the "new keywords" to create an object instance?
Cheers
Ian.
http://msdn2.microsoft.com/en-us/library/aa394346.aspx">http://www.eggheadcafe.com/forumtree.aspx?topicid=2
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Hi,
you're on the right track, however not all objects returned by your WMI have a SerialNumber,
so Serials["SerialNumber"] would be null for them. You need a null-test; adding a few log
statements to your code would have told you what was going on.
BTW: you will probably also need new ManagementObjectSearcher("SELECT * FROM Win32_LogicalDiskToPartition");
in search of the drive number that corresponds to a particular drive letter.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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Hello everybody,
I am searching for a long time for a possibility to read some windows settings and display it in my C#-program.
I want to have the following options:
start-> run -> "dcomcnfg" -> components -> computer -> My Computer
now right click on "my computer" -> "Properties"
Now register "Com Security" and "edit Limits" Now I want to display all users and their rights. Only read, not write new rights (at the moment). My programm and myself are working with full admin rights, so there should be no problem with rights or something like that.
I do not know how I can get the user and their rights in my program. In the registry, there is value with a very long string. if I change the rights, the string will be changed too. But I do not know if the string represents the full users including their rights. And how I read (decode) it?
Is this the right way?
Can you help me?
Thanks for your answers!!!!
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Hi,
I'm building a small command line app to test connections to remote system, just like with telnet. I need it to test both TCP and UDP connections.
TCP works fine but i don't know how to test UDP connections since they are stateless.
For testing TCP I'm using
<br />
System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)<br />
Then i use the Socket.Connect(hostName, portNumber) method to establish connection. If that succeeds and no exception is thrown, i count it as success.
If i try the same with UDP
<br />
System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)<br />
Using Socket.Connect(hostName, portNumber) method against a closed port doesn't throw an exception or any other sign of failure.
Can any one suggest a way to test UDP connections?
Thanks,
darthBug
Join the dark side of the code
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