Re: ASCII Code - C# Discussion Boards

~~_{lost in transition}~~ 5-Jan-07 4:06

5-Jan-07 4:06

Just remember curiosty kills the cat. Or in these days the cat get skinned, tared and feathered, and thrown in jail with a big guy named Bubba.

Programmer: A biological machine designed to convert caffeine into code. * Developer: A person who develops working systems by writing and using software.
[^]

end of line character Y position

netJP12L4-Jan-07 11:15

netJP12L

4-Jan-07 11:15

I am printing some text in my print preview. It prints perfectly fine. Now what i want is to get the Y position of the last chacacter of the string. Once i get the Y position of the last character I want to add some more characters on the postion of (Y+10). Is that posible to do. I would appreciate your favor.
For instance:
This is the my frist string. (I want to get the "." position). If lets say "." is 50.
I want to add a new line base on the Y postion of the "." so it's gonna be 50+10 for me to add next set of string on the position

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
int charactersOnPage = 0;
int linesPerPage = 0;

e.Graphics.MeasureString(stringToPrint, this.Font,
e.MarginBounds.Size, StringFormat.GenericTypographic,
out charactersOnPage, out linesPerPage);

e.Graphics.DrawString(stringToPrint, this.Font, Brushes.Black,
e.MarginBounds, StringFormat.GenericTypographic);

stringToPrint = stringToPrint.Substring(charactersOnPage);

e.HasMorePages = (stringToPrint.Length > 0);
}

Re: end of line character Y position

Christian Graus4-Jan-07 11:30

Christian Graus

4-Jan-07 11:30

MeasureString on the Graphics object will tell you how many pixels the string will take up, so you can work it out from there.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Embedded Progressbar Problem

slugonamission4-Jan-07 10:28

slugonamission

4-Jan-07 10:28

I've tried for a while to get a progressbar embedded within a listview, but just have one problem. If you resize the column that the progressbar is in so that it can fill the whole row, then the progressbar doesn't resize correctly when the scrollbar is moved. See the picture below. This only happens for columnindex > 0

This is the code I am using

protected override void OnDrawSubItem(DrawListViewSubItemEventArgs e)
        {
            if (e.Item.GetType() == typeof(MyListViewItem))
            {
                MyListViewItem item = (MyListViewItem)e.Item;

                if (item.Bars.ContainsKey(e.ColumnIndex))
                {
                    e.DrawDefault = false;
                    //Find where the bar should be drawn by adding up the widths of the columns below this one

                    if (e.ColumnIndex > 0)
                    {
                        int runningTotal = 0;
                        for (int i = e.ColumnIndex - 1; i >= 0; i--)
                        {
                            System.Diagnostics.Debug.WriteLine(e.ColumnIndex);
                            runningTotal += this.Columns[i].Width;
                        }

                        //Add on the left client bound
                        runningTotal += e.Item.Bounds.Left;
                        item.Bars[e.ColumnIndex].Location = new System.Drawing.Point(runningTotal, e.Bounds.Location.Y);
                        item.Bars[e.ColumnIndex].Width = this.Columns[e.ColumnIndex].Width;
                        item.Bars[e.ColumnIndex].Height = e.Bounds.Size.Height;
                    }
                    else
                    {
                        int clientBound = e.Item.Bounds.Left;

                        item.Bars[e.ColumnIndex].Location = new System.Drawing.Point(clientBound, e.Bounds.Location.Y);
                        item.Bars[e.ColumnIndex].Width = this.Columns[e.ColumnIndex].Width;
                        item.Bars[e.ColumnIndex].Height = e.Bounds.Size.Height;
                    }
                }
                else
                    e.DrawDefault = true;
            }
            else
                e.DrawDefault = true;
            
            base.OnDrawSubItem(e);
        }

I have also overridden "OnColumnWidthChanging" to resize the bars when the column width changes, and also overridden WndProc to try and catch the scrollbars being moved, although that didn't work, so I'm assuming the problem lies in the code section for if(e.ColumnIndex > 0)

Thanks in advance ~ Jamie

P.S. - the image. The scrollbar should be in the "newcol" column.
http://img.photobucket.com/albums/v635/slugonamission/Problem.jpg

Re: Embedded Progressbar Problem

Judah Gabriel Himango4-Jan-07 11:32

Judah Gabriel Himango

4-Jan-07 11:32

Hi Jamie

I'm not sure what's wrong with your current code, but have you look at this article[^]? It shows how progress bars can be embedded in a custom list view, so it seems applicable.

Tech, life, family, faith: Give me a visit.
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Judah Himango

ASCII Code

CodeItWell4-Jan-07 10:10

CodeItWell

4-Jan-07 10:10

How to do this.
When I enter some number (ASCII code of some character) in textBox, in other textBox to appear the character.
Exp: 97 => a
118 => v
65 => A
and so on.

Vasildb

Re: ASCII Code [modified]

Nader Elshehabi4-Jan-07 10:33

Nader Elshehabi

4-Jan-07 10:33

Handle the TextChanged event of the first textbox. In the handler write:

ushort value;
if(ushort.TryParse(InputTextBox.Text, out value))
{
    OutputTextBox.Text = Encoding.ASCII.GetString(new byte[] { value});
}
else
{
    OutputTextBox.Text == "";
}

-- modified at 16:38 Thursday 4th January, 2007
PS.
1- char Datatype is unicode actually. So it could accept values outside the Ascii range.
2- MessageBoxes and TextBoxes are incapable of displaying all the Ascii characters. Some are inprintable and would display a different value. To fully display all printable Ascii characters you would need a console.

Regards

Re: ASCII Code

slugonamission4-Jan-07 10:38

slugonamission

4-Jan-07 10:38

You would just need to use the "TextChanged" event of the textbox, then if the entered number(s) fall within the range for an ASCII character, cast the integer to char.

Something like this would work.

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            textBox2.Text = string.Empty;
            
            string text = string.Empty;

            string[] chars = textBox1.Text.Split(' ');

            foreach (string str in chars)
            {
                //First, convert it to int
                if (str.Length > 0)
                {
                    int num = Convert.ToInt32(str);
                    textBox2.Text += (char)num + " ";
                }
            }
        }

Re: ASCII Code

CodeItWell4-Jan-07 11:04

CodeItWell

4-Jan-07 11:04

But if I enter a char the program will falls.
How to eliminate this.

Vasildb

Re: ASCII Code

Christian Graus4-Jan-07 14:27

Christian Graus

4-Jan-07 14:27

The other solution was better.

Instead of Convert.ToInt32, use int.TryParse to see if it's a number. Or make the text box accept numbers only.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

how to sent the cursor from one textbox to another textbox by pressing enter key(in vb we may use keypress event)

zelane4-Jan-07 8:15

zelane

4-Jan-07 8:15

hi i want to sent the cursor from one textbox to another textbox or button just pressing ENTER key all time. but i am not getting any way so that i can perform this job which i can do very easily in vb just using keypress event and keyenter(keyascii). i will be grateful if somebody sent me this solution zelane

Re: how to sent the cursor from one textbox to another textbox by pressing enter key(in vb we may use keypress event)

Nader Elshehabi4-Jan-07 8:20

Nader Elshehabi

4-Jan-07 8:20

1- Handle the TextBox.KeyDown event.
2- In the handler call NextTextBox.Focus() method;

Regards

Re: how to sent the cursor from one textbox to another textbox by pressing enter key(in vb we may use keypress event)

zelane4-Jan-07 8:40

zelane

4-Jan-07 8:40

i am new in C# so that can't understand how to get help from your hints. request u to explain a little. showing just two textbox (like textbox1 and textbox2)

Re: how to sent the cursor from one textbox to another textbox by pressing enter key(in vb we may use keypress event)

Nader Elshehabi4-Jan-07 8:44

Nader Elshehabi

4-Jan-07 8:44

Alright! I guess atleast you know the PropertiesGrid, right?
1- Select TextBox1. Open PropertiesGrid. Open Events tab -little lightning button to the top-. DoubleClick on KeyDown event.
2- The code should show. Add these lines

if (e.KeyData == Keys.Enter)
    TextBox2.Focus();

3- Err... That's it! Big Grin | :-D

Regards

Re: how to sent the cursor from one textbox to another textbox by pressing enter key(in vb we may use keypress event)

gnadeem4-Jan-07 8:52

gnadeem

4-Jan-07 8:52

adding to what Nader said,
you can further fine-tune by querying TabStop and TabIndex properties of the
text boxes (controls where applicable) and compare TabIndex to dynamically set focus to the control which is next in the TabIndex order.

regards.

problem with progressbar

suck1234-Jan-07 8:07

suck123

4-Jan-07 8:07

I want to implement a progressbar that indicates the progress of a thread going on
I've got a
public void F1(Object o)
which has the thread body

and a button which start the thread

and when I want to make things like
progressBar1.Maximum = 100;
in the F1 a get a cross-thread error

can anyone help?

Re: problem with progressbar

Nader Elshehabi4-Jan-07 8:18

Nader Elshehabi

4-Jan-07 8:18

Sure. Controls are not thread safe. You should use Invoke to update your progressbar:
1- Make a method in your form that has the progressbar. Let's say

public void UpdateProgress(int NewPosition)
{
    MyProgressBar.Value = NewPosition;
}

2- Declare your delegate in the form:

public delegate void MyDelegate(int NewPosition);

3- Now in your Thread, just invoke it like this:

public void MyThreadMethod()
{
    //instantiate the delegate and assign it to the method
    MyDelegate MyProgressDelegate = new MyDelegate(UpdateProgress);
    //Some code
    Invoke(MyProgressDelegate, new object[] { 10 });
    //Some code
    Invoke(MyProgressDelegate, new object[] { 20 });
    //Some code
    Invoke(MyProgressDelegate, new object[] { 30 });
    //etc...
}

Regards

ADO.NET help, editing data in a database

Blekk4-Jan-07 7:59

Blekk

4-Jan-07 7:59

Hi,

I didn't know where I should post this, but because it is in C# I thought this would be the best place, even though it is ADO.NET stuff.

Anyway, I have a question, I have created a datasource to the northwind database and created a simple windows form. With the first name, last name textboxes etc. and to select the employees I use the listbox with the employees last names in it. I have added an the TextBox_Validate Event to each textbox with the code:

 private void TextBox_Validated(object sender, EventArgs e)<br />
        {<br />
            employeesTableAdapter.Update(northwndDataSet1.Employees);<br />
<br />
            employeesTableAdapter.Fill(northwndDataSet1.Employees);<br />
        }

Yet, when I change a name, and then tab or click somewhere else, it doesn't update the database with the new name.

What am I doing wrong?

Thanks,

Any reply is appreciated

Re: ADO.NET help, editing data in a database

Nader Elshehabi4-Jan-07 8:25

Nader Elshehabi

4-Jan-07 8:25

I've used ADO myself for sometime and have seen alot of errr.... Surperises you'd call them?! Big Grin | :-D

Anyway, I'm sure the code is called, and that it's excuted without errors. From your code it looks like you've used the designer. Why didn't you use it to make the textboxes. It would update them automatically using a DataNavigator?

Regards

Re: ADO.NET help, editing data in a database

led mike4-Jan-07 8:26

led mike

4-Jan-07 8:26

Blekk wrote:
What am I doing wrong?

It would appear you did not look at the MANY database articles here on CodeProject. Give it a shot, I imagine it will help.

led mike

Magnify function

Gywox4-Jan-07 7:26

Gywox

4-Jan-07 7:26

Hi,

I wish to have a magnify function in my program (C#) to view the form,
like that program in Windows XP (/Accessories/Accessibility/Magnifier).
How do I get the forms current view (appearance), and how do I show that in another form?

Can anyone help out?

Thanks in advance!

Gywox

Re: Magnify function

Nader Elshehabi4-Jan-07 7:50

Nader Elshehabi

4-Jan-07 7:50

1- Get current mouse position using Form.MousePosition property
2- Copy the area of the screen you desire using Graphics.CopyFromScreen()
3- scale it using Graphics.Scale() method.
3- Draw it into a Bitmap
4- View the bitmap in the other form inside a PictureBox for example.

Regards

Starting WMP Control from System.IO.Stream

EddieRich4-Jan-07 7:15

EddieRich

4-Jan-07 7:15

I have a unique situation. I need to selectively play some mpeg videos in different sequences depending on the state of my main App. I have been able to add WMP to my form and play videos by setting URL = @"C:\path\filename.mpg". However, in the release version I cannot store the videos on the customers drive, so they must be embedded in the resources of the app. That's not the problem though.

I would like to be able to create a MemoryStream and dynamically build the "file" which will reside in memory. However, there is no way to tell the WMP control to play my System.IO.MemoryStream. I would have to save to disk and set URL = the new temporary file, and that isn't allowed.

Is there a way to point the URL at a resource in an assembly ?
If not, can I tell WMP to play a System.IO.Stream ?

Re: Starting WMP Control from System.IO.Stream

Judah Gabriel Himango4-Jan-07 7:34

Judah Gabriel Himango

4-Jan-07 7:34

Both are possible, I'm quite sure. But telling WMP to play a Stream would involve writing a shell extension that pretends your stream is a file.

An easier option might be the embedded resource route. Does this article[^] help you?

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Check out this cutie
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Unwanted changes to designer file

ndoran4-Jan-07 6:22

ndoran

4-Jan-07 6:22

I have a windows form that inherits numerous controls from a parent form. Whenever I open the child form in the designer, I immediately get an asterisk that the file has unsaved changes, before I have changed anything. When I look at the .designer.cs file, numerous lines have been added, such as below:

Infragistics.Win.Appearance appearance1 = new Infragistics.Win.Appearance();
Infragistics.Win.Appearance appearance2 = new Infragistics.Win.Appearance();
//	other designer code that was there before
this.ultraGridValidator.DisplayLayout.Appearance = appearance1;
...

And numerous lines have changed throughout the designer file (mostly locations and sizes):

this.configTab.Size = new System.Drawing.Size(766, 295);	// just the numbers have changed

When I open the base form in the designer, I get the asterisk, but usually nothing has changed. Sometimes locations / sizes have changed, even though I haven't moved anything. Obviously we're using Infragistics, but I don't know if that's the cause of the problem. I only suspect it because most of the lines added are related to the grid. I am also suspicous of the toolbar we recently added, just because of the timing. I have read msdn articles regarding problems with editing complex controls on inherited forms, but we're not trying to edit anything. We're just trying to keep things from randomly changing!

Has anyone seen anything like this? And any suggestions on how to fix it? It's killing productivity on our gui.

This is .NET 2.0 with Infragistics 6.1. I tried the latest VS service pack, but no luck.

Any help would be appreciated.

Thanks in advance.

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