Re: How can I have my Cursor visiable? - C# Discussion Boards

Re: Graphics ..with c #

Christian Graus2-May-07 14:45

Christian Graus

2-May-07 14:45

No-one is going to read all of this.

mr jets wrote:
private void menuItem3_Click(object sender, System.EventArgs e)
{
//open the file
string str_reader;
if(openFileDialog1.ShowDialog()==DialogResult.OK)
{
StreamReader streamReader=new
StreamReader(openFileDialog1.FileName);
str_reader=streamReader.ReadToEnd();
MessageBox.Show(str_reader);
streamReader.Close();
}

This code assigns your file contents to a string, which you then discard ( it's a local variable, so it disappears after the function ends ). By what process did you expect your program to do anything with this data ?

mr jets wrote:
for(int j=0;j {
streamWriter.WriteLine("Line");
start=(Point)arraylist_points[j];
end=(Point)arraylist_points[j+1];
str_Line=start.ToString()+end.ToString();
streamWriter.WriteLine(str_Line);
j++;
}
streamWriter.Flush();
streamWriter.Close();
fs.Close();

You need to reverse this process and fill your array of points with the data you've read in.

Your program is not like Paint. Paint deals in raster info, you're doing a drawing package.

You shouldn't use a picture box, that's a waste of time, write your own handler for the paint message.

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 )

Re: Graphics ..with c #

mr jets2-May-07 14:58

mr jets

2-May-07 14:58

heloo christian ..u are my hero man ..there was awrong with my save code..:

// save the file

string str_Line;
System.IO.FileStream fs = new System.IO.FileStream("c:\\graphics.txt", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite);
StreamWriter streamWriter=new StreamWriter(fs);
if(drawwhat==1)
{
for(int j=0;j

Re: Graphics ..with c #

Christian Graus2-May-07 15:28

Christian Graus

2-May-07 15:28

mr jets wrote:
about my open code what should i do to make the program display the file after reading the data from the text..?

Like I said, you need to parse the text and use it to fill your array of points. It really seems to me like you probably need an array of instances of a struct that contains all the data you need to draw different items, I thought I saw you drawing polygons, etc ? But, either way, what ever you store in your array, you need to repopulate. Your drawing code draws based on that array, right ? So how can it draw if you don't populate that array with the data ?

How to get a mini dump?

Super Lloyd2-May-07 13:33

Super Lloyd

2-May-07 13:33

On some client's computer the XmlDocument.Save() fails with some weird internal error such as:

==============
Exception : System.IO.IOException
Message : Unknown error "-1".
Source : mscorlib
Help :
Stack :
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)

at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at System.Xml.XmlDocument.Save(String filename)
===============

I have reported such a problem to microsft and they just told me they need more information such as a mini dump.
how do I do one?

Re: How to get a mini dump?

Super Lloyd2-May-07 17:20

Super Lloyd

2-May-07 17:20

found it:
http://blogs.msdn.com/greggm/archive/2004/08/14/214725.aspx[^]

Select from another select statement to a repeater

simsen2-May-07 11:28

simsen

2-May-07 11:28

Hi,

I have a big problem, I hope you can help me with.

What I want:
A forum where there is 3 columns Subject, AnswersCount, LastAnswer

I have one table with all the data. And two selects functions, where I on the first, get all Subjects for all questions, and on the second select get the Count for all answers on a specific question (with input quiestionId). Both functions works perfect, when I use them seperatly.

But I have to go through all rows in the first selection to find the Count

What shall I do to that?

The code I have now is:

The Repeater, where I want to put all data into:
<asp:repeater id="repDebatIndlaeg" runat="server">
<headertemplate>

Antal indlæg ialt:
<asp:label id="lblIndlaegIalt" runat="server" text="Label">


Emne	Antal indlæg	Seneste indlæg

<asp:hyperlink id="lnkEmne" runat="server" text="<%# Eval("Overskrift") %>" navigateurl="<%# "~/Debat.aspx?id=" + Eval("DebatId") %>">	<asp:label id="lblAntalIndlaeg" runat="server" text="<%# Eval("DebatNr") %>">	<asp:label id="lblSenesteIndlaeg" runat="server" text="<%# Eval("Dato") %>">

The codebehind:

protected void Page_Load(object sender, EventArgs e)
{
DebatApi debatapi = new DebatApi();

if (!IsPostBack)
{
try
{
DataTable Debat = null;
if (debatapi.GetDebat(ref Debat) == Status.Success)
{
int tael = 0;

for (int i = 0; i < Debat.Rows.Count; i++)
{
tael = Convert.ToInt32(Debat.Rows[i]["DebatId"]);
DataTable DebatCount = null;

if (debatapi.GetCountAnswers(tael, ref DebatCount) == Status.Success)
{

}
}
repDebatIndlaeg.DataSource = Debat.DefaultView;
repDebatIndlaeg.DataBind();
}
}
catch
{
}
}

debatapi.Dispose();
}

What shall I put into here so I can write the output into the repeater:
if (debatapi.GetCountAnswers(tael, ref DebatCount) == Status.Success)
{

}

If it was a label outside an repeater, I would make something like:

lblAntalIndlaeg.Text = Convert.ToInt32(GetKontoplanFuld.Rows[i]["DebatNr"]);

But VS cann't finde the lblAntalIndlaeg Frown | :-(

I hope someone can help me....Im pretty desperat....

Kind regards,
simsen Smile | :)

How can I have my Cursor visiable?

Khoramdin2-May-07 11:26

Khoramdin

2-May-07 11:26

Hello everyone,

I am using Directshow API in Visual C# enviroment. I am using the following code to toggle Full-Screen. My problem is that when I have the Full-Screen mode, my courser disapears! Can someone tell me how I can have my Courser visiable in the Full-Screen mode?

	void ToggleFullScreen()<br />
	{<br />
		if( videoWin == null )<br />
			return;<br />
<br />
		int mode;<br />
		int hr = videoWin.get_FullScreenMode( out mode );<br />
		if( mode == DsHlp.OAFALSE )<br />
		{<br />
			mode = DsHlp.OATRUE;<br />
			hr = videoWin.put_FullScreenMode( mode );<br />
            if (hr >= 0)<br />
            {<br />
                fullScreen = true;<br />
            }<br />
		}<br />
		else<br />
		{<br />
			mode = DsHlp.OAFALSE;<br />
			hr = videoWin.put_FullScreenMode( mode );<br />
            if (hr >= 0)<br />
            {<br />
                fullScreen = false;<br />
            }<br />
			this.TopMost = true;<br />
			this.Refresh();<br />
		}

Thank you very much and have a great day.

Khoramdin

Re: How can I have my Cursor visiable?

AFSEKI7-May-07 5:56

AFSEKI

7-May-07 5:56

1) Before toggling to full screen mode, store a reference to your main window.

2) then handle mouse_move events

3) call Cursor.Draw(..) to draw it on the form as (source code from MSDN Library):

private void DrawCursorsOnForm(Cursor cursor)
{
// If the form's cursor is not the Hand cursor and the
// Current cursor is the Default, Draw the specified
// cursor on the form in normal size and twice normal size.
if(this.Cursor != Cursors.Hand &
Cursor.Current == Cursors.Default)
{
// Draw the cursor stretched.
Graphics graphics = this.CreateGraphics();
Rectangle rectangle = new Rectangle(
new Point(10,10), new Size(cursor.Size.Width * 2,
cursor.Size.Height * 2));
cursor.DrawStretched(graphics, rectangle);

// Draw the cursor in normal size.
rectangle.Location = new Point(
rectangle.Width + rectangle.Location.X,
rectangle.Height + rectangle.Location.Y);
rectangle.Size = cursor.Size;
cursor.Draw(graphics, rectangle);

// Dispose of the cursor.
cursor.Dispose();
}
}

this is the first idea I had after 11 hours of non-stop programming, hope it helps...

Update() database from DataSet

aecordoba2-May-07 10:58

aecordoba

2-May-07 10:58

Hi, there!
I can't Update a table in database after a row is deleted in DataSet.
I delete a row, as following:

DataRow[] usersRows;<br />
usersRows = ContactsDataSet.Users.Select("UserName = '" + userName + "'");<br />
foreach (DataRow userRow in usersRows)<br />
          userRow.Delete();

and I tried to update the database:

DataSetTableAdapters.UsersTableAdapter usersTableAdapter = new    DataSetTableAdapters.UsersTableAdapter();<br />
usersTableAdapter.Update(contactsDataSet.Users);

But the data aren't updated.

Can someone help me?

Thank you in advance.

--
Adrián Córdoba