C# Discussion Boards - CodeProject

Re: How to add a ScrollBar where there is none?

Xmen Real 25-Feb-09 23:47

25-Feb-09 23:47

well I really dont understand what you want actually but I'm sure you are making this very complicated. Why you are using Dictionary. You can use List<PictureBox>.

Megidolaon wrote:
Since you can't choose which part of an image is assign to a PictureBox

what that mean ?

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Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y
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128 bit encrypted signature, crack if you can

Re: How to add a ScrollBar where there is none?

Megidolaon26-Feb-09 2:02

Megidolaon

26-Feb-09 2:02

So that I ensure I have only 1 PictureBox for each coordinate.
In a List I could end up having with 2 PictureBoxes having the same coordiantes.

Xmen wrote:
what that mean ?

When you assign the Image property of a PictureBox, you can only assign the whole image, in my case that would be the whole 256x2000 pixel source image.
What I want is to split that image into 32x32 pixel tiles and assign each of these tiles to a different PictureBox, so you can click on and select each separately.

Then you can paste the 32x32 tiles and build your map with them.

Re: How to add a ScrollBar where there is none?

Xmen Real 26-Feb-09 2:49

Xmen Real

26-Feb-09 2:49

Megidolaon wrote:
So that I ensure I have only 1 PictureBox for each coordinate.In a List I could end up having with 2 PictureBoxes having the same coordiantes.

That mean you are scaring to write a little more code that will validate. Its quite simple, if you dont want to put multiple pictureboxes at same point then you can just iterate through previous pictureboxes' location. BTW I dont think you will get same point again if you try to write a good code (No need for validation) Wink | ;)

Megidolaon wrote:
When you assign the Image property of a PictureBox, you can only assign the whole image, in my case that would be the whole 256x2000 pixel source image.What I want is to split that image into 32x32 pixel tiles and assign each of these tiles to a different PictureBox, so you can click on and select each separately.Then you can paste the 32x32 tiles and build your map with them.

2000 cant be divide by 32, your image must have 2048 height if you gonna tile of 32 x 32

OoO Well, once I wrote a code similar to this but I just used a single PictureBox.
What you need to do is use the MouseClick events of PictureBox. In MouseClick, grab the cursor position, round the position to least tile position and rip it from image.

eg
Cursor Position : 35, 126
Nearest Tile Position(by rounding) : 32, 96

If you are unable to write code to round, just give a bell Wink | ;)

An advice, do not set Image in Image property, use BackgroundImage instead, therefore you can use BackgroundImageLayout and avoid lots of hassles.

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Re: How to add a ScrollBar where there is none? [modified]

Megidolaon26-Feb-09 20:49

Megidolaon

26-Feb-09 20:49

As for the PictureBox coordinates, I program by the motto "better save than sorry".
I try to avoid even theoretically impossible situations, like slightly wrong named files (since I'm the only one that names the files), even if such a situation should never happen, I know in the rare case it does (if I forgot the guidelines I made up or whatever), the program will still work fine.
The dictionary works god, I'll just leave it lie that.

Xmen wrote:
2000 cant be divide by 32, your image must have 2048 height if you gonna tile of 32 x 32

I use the Math.Ceiling() method to add enough PictureBoxes to contain images that aren't dividable by 32 and the Image property of the PictureBoxes at the edges should contain the last bit of the source image.
I want to keep the source image size a bit flexible.

Xmen wrote:
Cursor Position : 35, 126
Nearest Tile Position(by rounding) : 32, 96

I already used the MouseDown event to determine which PictureBox was clicked on and changed its BorderStyle.
I laos determined whichPictureBox was last clicked on and changed its BorderStyle back to None, to highlight only the one you clicked on last.

Xmen wrote:
An advice, do not set Image in Image property, use BackgroundImage instead, therefore you can use BackgroundImageLayout and avoid lots of hassles.

I used

pictureboxes[coordinate].BackgroundImageLayout = ImageLayout.Tile;

and tried all available ImageLayouts, with an without my own code.
All PictureBoxes were white and I had a weird smear effect where the the Borders of the PictureBoxes smeared about an inch on the right side of the form, outside the FlowLayoutPanel.

I got it right now, I adjusted my loops and changed a bit, the PictureBoxes were all over the place, with some not even being displayed (I found that out by numbering a few), but now everything is fine.

I even painted the last PictureBoxes first with the BackColor of the form (through a Pen's Brush property) and now it looks like only the source image is displayed.

Re: How to add a ScrollBar where there is none?

Xmen Real 27-Feb-09 1:37

Xmen Real

27-Feb-09 1:37

Since you got it work, no further answers Wink | ;)

if you wanna check mine one, here is the link[^]

Re: How to add a ScrollBar where there is none? [modified]

Megidolaon1-Mar-09 20:30

Megidolaon

1-Mar-09 20:30

Thanks a lot, you helped me a great deal. Wink | ;)

I had a problem with the FlowLayoutPanel, which kept me from displaying the PictureBoxes properly, the FlowLayoutPanel overrides the actual location and changes it according to FlowLayout.

I switched to a normal Panel.
I had a problem where even when setting the AutoScroll peroptery to true, it woudn't add any scrollbars, even if I had many more PictureBoxes then could be displayed at once.
However, I copypasted a Panel from a codeproject article (seemingly the same as mine) and suddenly it worked.
Now my Panel doesn't change the location and adds scrollbars that allow you to scrll arund if the amount of PictureBoxes is too large to display at once.

modified on Monday, March 2, 2009 6:07 AM

Re: How to add a ScrollBar where there is none?

Xmen Real 2-Mar-09 5:55

Xmen Real

2-Mar-09 5:55

Megidolaon wrote:
which kept me from displaying the PictureBoxes properly

is it public ?

Re: How to add a ScrollBar where there is none?

Megidolaon2-Mar-09 20:24

Megidolaon

2-Mar-09 20:24

It was private and so were the Panel, I used at first and the Panel, that I use now and which works.

Re: How to add a ScrollBar where there is none?

Megidolaon6-Mar-09 1:11

Megidolaon

6-Mar-09 1:11

Now that it works I have a new problem.

The MouseUp event for a PictureBox gets fired the moment I click on a PictureBox.
The problem is that I'd use it allow the user to select multiple tiles while the mouse button is held down and paste them onto the map tiles, again while the mouse button is held down.
If the MouseUp event gets fired without actually releasing the mouse button, this is not possible.

Is there any way around this? Confused | :confused:

How to Loop through this Arraylist

Vimalsoft(Pty) Ltd25-Feb-09 3:03

Vimalsoft(Pty) Ltd

25-Feb-09 3:03

Good day All

i have a Following Arraylist that carries the List of Arraylist Values of String type. I want to Disable a Cell that does not match with the Values in the Arraylist.

 ArrayList arr = Disable_Grid();

foreach(arr in ultraGridCycles)
{
  //hide the Cell ;
}

Thank you

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
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vuyiswa@its.co.za
www.ITS.co.za

Re: How to Loop through this Arraylist

Colin Angus Mackay25-Feb-09 3:14

Colin Angus Mackay

25-Feb-09 3:14

You have not supplied sufficient information.

Vuyiswa Maseko wrote:
I want to Disable a Cell

What cell?

Vuyiswa Maseko wrote:
does not match with the Values in the Arraylist.

There are many values in the array list. Are there many values in each cell?

Do you want to hide cells where the value of the cell is not contained within the ArrayList?

Finally, are you using .NET 1.x? If not, then why are you using an ArrayList.

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Re: How to Loop through this Arraylist

Vimalsoft(Pty) Ltd25-Feb-09 3:29

Vimalsoft(Pty) Ltd

25-Feb-09 3:29

Colin Angus Macka wrote:
What cell?

A Grid is made up of Columns and Rows. Like in in Excel we have Cells in a Gridview.

Colin Angus Macka wrote:

There are many values in the array list. Are there many values in each cell?

Yes, The Grid will be Populated with Values like

1234<br />

And in the Arraylist you might Find that there is 4. Now i want to Disable the cell that is carrying the values "123"

Colin Angus Macka wrote:
Do you want to hide cells where the value of the cell is not contained within the ArrayList?

Yes

Am Using .NET 2.0

Thank you

Re: How to Loop through this Arraylist

PIEBALDconsult25-Feb-09 3:54

PIEBALDconsult

25-Feb-09 3:54

How about using a HashSet instead?

(No one uses Arraylist anymore anyway.)

Re: How to Loop through this Arraylist

Vimalsoft(Pty) Ltd25-Feb-09 4:05

Vimalsoft(Pty) Ltd

25-Feb-09 4:05

That Wouldn't be a problem. I have changed from Arraylist but not to HashSet , am using 2.0 not 3.5

Thanks

Re: How to Loop through this Arraylist

PIEBALDconsult25-Feb-09 6:51

PIEBALDconsult

25-Feb-09 6:51

In my opinion HashSet is the only reason to use 3.5, if it weren't for that I'd still 2.0 as well.

Are you using a Dictionary then? That's what I use in my Set[^] class.

Challenge manipulating combobox selectedvalue and selectedvaluechanged

highjo25-Feb-09 2:44

highjo

25-Feb-09 2:44

Hi!
i know people have asked a lot about comboboxes but it's not really about how to get the value or index or whatever.Let me explain.it's users access management application with users, roles and rights:
i have a form editRight with 2 combobox cmbUsers to list users and cmbroles to list role of each users and 3 listboxes.let's pause here

on load event i fill users combobox with users

 private void EditRight_Load(object sender, EventArgs e)<br />
        {<br />
            try<br />
            {<br />
            //Load the user list in the dt_users dataset.dt_users and dt_roles are declare as global variables<br />
            dt_users = UserManager.FindAll().Tables[0];<br />
            //set the combobox cmbUsers datasource<br />
            cmbUsers.DataSource = dt_users.DefaultView;<br />
            //set display member and value member<br />
            cmbUsers.DisplayMember = "user_name";<br />
            cmbUsers.ValueMember = "user_id";<br />
<br />
                CallFillRoleCombo((int)cmbUsers.SelectedValue);<br />
            }<br />
            catch (System.Exception ex)<br />
            {<br />
                MessageBox.Show(ex.Message);<br />
            }<br />
        }<br />
<br />
        private void CallFillRoleCombo(int uid)<br />
        {<br />
            try<br />
            {<br />
                //load users roles into dt_roles database<br />
                dt_roles = UserRoleManager.FindByUser(uid).Tables[0];<br />
<br />
                //set combobox datasource<br />
                cmbroles.DataSource = dt_roles.DefaultView;<br />
                cmbroles.DisplayMember = dt_roles.Columns[2].ToString();<br />
                cmbroles.ValueMember = dt_roles.Columns[1].ToString();<br />
            }<br />
            catch (System.Exception ex)<br />
            {<br />
                MessageBox.Show(ex.Message);<br />
            }<br />
            <br />
        }<br />
<br />
        private void cmbUsers_SelectedValueChanged(object sender, EventArgs e)<br />
        {<br />
            CallFillRoleCombo((int)cmbUsers.SelectedValue);<br />
        }<br />

when i run the code its throws exception:Object reference not set to an instance of an object.It seems that its calling the cmbUsers_SelectedValueChanged eventhandler when setting the display member of the cmbUsers combobox.
How to work around it?Thank you for reading this.

eager to learn

Re: Challenge manipulating combobox selectedvalue and selectedvaluechanged

Cracked-Down25-Feb-09 3:00

Cracked-Down

25-Feb-09 3:00

In the following code for loading data in user combobox
unsubscribe the event cmbUsers_SelectedValueChanged and after filling data

subscribe again

private void EditRight_Load(object sender, EventArgs e)
{
try
{
//Load the user list in the dt_users dataset.dt_users and dt_roles are declare as global variables
dt_users = UserManager.FindAll().Tables[0];
//set the combobox cmbUsers datasource
cmbUsers.DataSource = dt_users.DefaultView;
//set display member and value member
cmbUsers.DisplayMember = "user_name";
cmbUsers.ValueMember = "user_id";


CallFillRoleCombo((int)cmbUsers.SelectedValue);
}
}

hope this works for you!

Re: Challenge manipulating combobox selectedvalue and selectedvaluechanged

Xmen Real 25-Feb-09 3:14

Xmen Real

25-Feb-09 3:14

got your problem

try this

private void cmbUsers_SelectedValueChanged(object sender, EventArgs e)
{
if (comboBox2.SelectedValue.GetType() == typeof(int))
CallFillRoleCombo((int)cmbUsers.SelectedValue);
}

Re: Challenge manipulating combobox selectedvalue and selectedvaluechanged

highjo25-Feb-09 7:39

highjo

25-Feb-09 7:39

Thanks guys for replying this post.Really apreciated it.The method that worked for me is the one suggested by deep@Pune.Thanks

eager to learn

Re: Challenge manipulating combobox selectedvalue and selectedvaluechanged

Cracked-Down25-Feb-09 17:55

Cracked-Down

25-Feb-09 17:55

your most welcome!! Smile | :)

yersterday I forgot to include actual lines in the code to subscribe and unsubscribe the event!!
Smile | :)

soru for that!!!!!

How to populate a CheckBox list from a based on a table in a database?

Balagurunathan S25-Feb-09 2:33

Balagurunathan S

25-Feb-09 2:33

Hi ,

I need some sample code that populates the checkBoxlist(C# Windows Application) based on the table values present is a SQL server database table.?

Someone help in this regard..

Thanks in Advance,

Balaguru

Re: How to populate a CheckBox list from a based on a table in a database?

Wendelius25-Feb-09 8:16

Wendelius

25-Feb-09 8:16

Did you search on the articles? For example this was found: http://www.codeproject.com/KB/grid/custCheckedListBox.aspx[^]

The need to optimize rises from a bad design.My articles[^]

Make pdf from cristal report, How ?

E_Gold25-Feb-09 2:13

E_Gold

25-Feb-09 2:13

Hi evryone
How can i make pdf from cristal report - in C# code (dont whant to see hem) ?

thank's

Re: Make pdf from cristal report, How ?

Wendelius25-Feb-09 8:12

Wendelius

25-Feb-09 8:12

You can use ReportDocument.ExportToDisk[^] method.

The need to optimize rises from a bad design.My articles[^]

Displaying a very long folder path

Dewald25-Feb-09 1:59

Dewald

25-Feb-09 1:59

Hi all. I'm sure there are loads of articles and examples on the net for what I'm trying to do but I don't know what you would call it and consequently I'm not sure what to Google for.

I'm trying to simplify a file path to something that will fit into a certain number of characters. I think I can best explain by using an example.

Let's say I have a file path as follows:
C:\Documents and Settings\My Name\My Documents\Work Documents\Business Plan.doc

but I have only limited space to display this path. I'm not overly concerned that the user should be able to read the full path (although I can do that by providing a ToolTip or putting the full path in the StatusStrip or whatever) but I would like for the user to get a general impression of where the path points.

I am in other words looking for a result along the lines of:
C:\Docum...\...\Business Plan.doc

If you have any suggestions for articles or examples on the net that deal with this I'd be happy to hear. Also, the above sample result is what I quickly came up with but there may be more sensible ways of stripping down long paths to something shorter. Please let me know if you have any advice.

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