C# Discussion Boards - CodeProject

6-Apr-06 8:21

Hi everyone,

I've got a problem and I can't solve it with anything! I have a button that when one clicks on it a groupbox is enabled showing a label with the value of a row which was random from a database. Then when one clicks the next button another question is random and displayed in the same label.Now I would like that after the user clicks the next button for ten times, it is disabled. How can I do this? Confused | :confused:

Thanks

Office Lineman6-Apr-06 8:35

6-Apr-06 8:35

Can you elaborate on the problem?

Is it disabling the button? Is it selecting random questions from a database? Is it keeping track of ten clicks?

Help us help you.

--
I've killed again, haven't I?

alee15.10.886-Apr-06 8:40

6-Apr-06 8:40

Yes a new question is random everytime I click the Next button. But it's not keeping track of the ten clicks that the user makes since I don't know how and at the moment the button is not disabled.

Office Lineman6-Apr-06 8:45

6-Apr-06 8:45

Create a variable, e.g. userClicks. Initialize it to 0. In your button's Click handler, increment the value of userClicks, and if it is 10, set the button's Enabled property to false.

--
I've killed again, haven't I?

alee15.10.886-Apr-06 9:11

6-Apr-06 9:11

Thank you, Thank you

I've done it Big Grin | :-D

junglerover776-Apr-06 16:26

junglerover77

6-Apr-06 16:26

just use an INVISIBLE TextBox control to store the track and count of the clicks. Sleepy | :zzz:

Jakob Farian Krarup6-Apr-06 8:46

Jakob Farian Krarup

6-Apr-06 8:46

Hi Alee

It would be helpful if you told us whether this is a windows- or web application. But I guess you're talking about web.

You could store the number of times in ViewState (a hidden form field on the webpage)

Something along the lines of:
http://www.sweetsilence.dk/codeprojectprojects/limitedclicks/[^]

Here is the code below, also available at:
http://www.sweetsilence.dk/codeprojectprojects/limitedclicks/limitedclicks.zip[^]

--------------------------------------------------------------------------

public class WebForm1 : System.Web.UI.Page
{
	protected System.Web.UI.WebControls.Label lblQuote;
	protected System.Web.UI.WebControls.Label lblNumberOfClicksLabel;
	protected System.Web.UI.WebControls.Label lblNumberOfClicksValue;
	protected System.Web.UI.WebControls.Button btnShowQuote;
	
	//makes it easier to store an int in ViewState by wrapping it in a property
	protected int NumberOfClicks
	{
		get 
		{
			//if there is no value in ViewState, return 0 (zero)
			if(this.ViewState["clicks"] == null)
				return 0;
			else
				return (int)ViewState["clicks"];
		}
		set{this.ViewState["clicks"] = value;}
	}

	private void btnShowQuote_Click(object sender, System.EventArgs e)
	{
		//if there are still clicks left
		if(this.NumberOfClicks < 10)
		{
			//show quote
			lblQuote.Text = GetQuote();
			//increment number of clicks
			NumberOfClicks++;
		}
		else
		{
			//let them know that the show is over
			lblQuote.Text = "[no more quotes for you!]";
			lblQuote.ForeColor = Color.Red;
		}
	}

	public string GetQuote()
	{
		//implement your own code to get random quote
		if(this.NumberOfClicks % 2 == 0
			return "Even is pretty good";
		else
			return "Odd is good too ; )";
	}

	private void WebForm1_PreRender(object sender, System.EventArgs e)
	{
		lblNumberOfClicksValue.Text = this.NumberOfClicks.ToString();
	}
}

Three kinds of people in the world:
- Those who can count..
- Those who can't!

-- modified at 14:47 Thursday 6th April, 2006

alee15.10.886-Apr-06 9:07

6-Apr-06 9:07

Actually at the moment I'm working with windows and when I'll be ready I'm going to do it in a web application.

Jakob Farian Krarup6-Apr-06 9:37

Jakob Farian Krarup

6-Apr-06 9:37

Well then... here is a Windows version just for you Big Grin | :-D

http://www.sweetsilence.dk/codeprojectprojects/limitedclicks/LimitedQuotes_Winsolution.zip[^]

Kind regards - Jakob

Three kinds of people in the world:
- Those who can count..
- Those who can't!

ToolStripRenderer

vishalkarlay6-Apr-06 6:49

vishalkarlay

6-Apr-06 6:49

I want to design custom Menubar control. For that i am deriving a new class from MenuStrip. I want to add some custom functionality to this control. The tabs in the popup menu should have custom color on hover. We are planning to use toolstriprenderer for the same.

I would like to know if the toolsriprenderer is fine or some other approach is required.

Re: ToolStripRenderer

Judah Gabriel Himango6-Apr-06 6:56

How to declare virtual Columns

6-Apr-06 6:56

That would probably be the best way to do it.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: How 'bout a little guitar now?
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

mrkeivan6-Apr-06 6:20

mrkeivan

6-Apr-06 6:20

Can I declare virtual Columns in my program? Imagin I have a table (ID and Name)
and in my search comand I retirieve data (one column)from another table and it's added to my dataGridView( where I show the results), I want to be able to creat one virtua column in this table where it doesnot exist in my main database.
I know there is such thing in DELPHI, i'm not sure we have such thing in C# ?!

Thanx
Mr.K

Re: How to declare virtual Columns

Office Lineman6-Apr-06 8:42

Re: How to declare virtual Columns

6-Apr-06 8:42

Certainly. You can add the column to the DataGridView with DataGridView.Columns.Add[^] and supply whatever contents you want programmatically, or on the fly with an event handler such as DataGridView.CellFormmating[^] or a custom-derived column type.

--
I've killed again, haven't I?

mrkeivan6-Apr-06 9:11

mrkeivan

6-Apr-06 9:11

Thanx for the help
I have another problem, when i select from other tables it will automatically add the columns to my dataGridView1, how can I change the header for the new Columns ?

Re: How to declare virtual Columns

Office Lineman6-Apr-06 9:30

Re: load + save ADO.NET and c#

6-Apr-06 9:30

Even when I use data-bound columns, I almost always make my own columns because there are usually columns in my table that I don't want to be displayed--just there for support data and to composite for virtual columns.

When I make columns this way, I can set data-bound and virtual columns' header texts the same way:

private void InitDGV ()
{
  int idx;
  
  m_dgvDisplay.AutoGenerateColumns = false;
  
  // A virtual column designed to show icons.
  // Save the column index to use later in OnCellFormatting().
  DataGridViewImageColumn imgCol = new DataGridViewImageColumn();
  imgCol.Name = "Status";
  imgCol.HeaderText = "Status";
  imgCol.SortMode = DataGridViewColumnSortMode.NotSortable;
  idx = m_dgvDisplay.Columns.Add(imgCol);
  m_idxStatus = idx;
  
  // Bound to the "Name" column from the table
  idx = m_dgvDisplay.Columns.Add("PlayerName", "Player Name");
  m_dgvDisplay.Columns[idx].DataPropertyName = "Name";
  
  // Bound to the "Address" column from the table
  idx = m_dgvDisplay.Columns.Add("Address", "Address");
  m_dgvDisplay.Columns[idx].DataPropertyName = "Address";
  
  // Bound to the "City" column from the table, the "long" way
  DataGridViewTextBoxColumn cityCol = new DataGridViewTextBoxColumn();
  cityCol.Name = "City";
  cityCol.HeaderText = "City";
  cityCol.DataPropertyName = "City";
  m_dgvDisplay.Columns.Add(cityCol);
  
  // More columns added
  ...
  
  // Bind the grid to the table, where m_bsData is a
  // BindingSource bound to the table's default view.
  m_dgvDisplay.DataSource = m_bsData;
}

--
I've killed again, haven't I?

ListBox problem

Ready4u6-Apr-06 6:09

Ready4u

6-Apr-06 6:09

I've created a small application that print the content of a treeview and ListBox control.
It work's, but only if "DrawMode" is set to normal, when i try to change the value of this prop to OwnerDrawFixed and add this code :

private void LbDare_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)<br />
{<br />
Rectangle rc = new Rectangle(e.Bounds.X + delta , e.Bounds.Y + delta , e.Bounds.Width-10, e.Bounds.Height-delta);<br />
Console.WriteLine(e.State.ToString());<br />
<br />
StringFormat sf = new StringFormat();<br />
sf.Alignment = StringAlignment.Center;<br />
<br />
// UnBox the sender<br />
LbDare = (ListBox)sender ; <br />
<br />
// Get the item text<br />
string str = (string)LbDare.Items[e.Index];  <br />
Font font;<br />
if (TvDoc.SelectedNode != null)<br />
font = new System.Drawing.Font(TvDoc.SelectedNode.NodeFont.Name,TvDoc.SelectedNode.NodeFont.Size, TvDoc.SelectedNode.NodeFont.Style);<br />
else<br />
font = new System.Drawing.Font("Arial", 8);<br />
<br />
if ( e.State == ( DrawItemState.NoAccelerator | DrawItemState.NoFocusRect))<br />
e.Graphics.DrawString( str , font , new SolidBrush(Color.Black), rc);<br />
else<br />
e.Graphics.DrawString( str , font , new SolidBrush(Color.Red), rc);<br />
}

to formatting the text that appears, the preview dialog will replace the content of listbox with a totally-black box.

ps. the code below works only with default setting

<br />
// Create a single image from the content of treeview and listbox<br />
this._controlImage1 = GetImage(tree.Handle, tree.Width, tree.Height);<br />
this._controlImage2 = GetImage(ListB.Handle, ListB.Width, ListB.Height);<br />
<br />
System.Drawing.Size size = new Size(tree.Width + ListB.Width, tree.Height);<br />
Bitmap bmp = new Bitmap(size.Width,size.Height);<br />
Graphics g = Graphics.FromImage(bmp);<br />
<br />
g.DrawImage(this._controlImage1, 0,0,this._controlImage1.Width, this._controlImage1.Height);<br />
g.DrawImage(this._controlImage2, this._controlImage1.Width+1,5,ListB.ClientSize.Width, ListB.ClientSize.Height);<br />
<br />
this._controlImage = bmp;<br />
g.Save();<br />
g.Dispose();<br />
<br />
// This could create the image starting from the control passed by handle<br />
private Image GetImage(IntPtr handle, int width, int height) {<br />
	IntPtr screenDC = GetDC(IntPtr.Zero);<br />
	IntPtr hbm = CreateCompatibleBitmap(screenDC, width, height);<br />
	Image image = Bitmap.FromHbitmap(hbm);<br />
	Graphics g = Graphics.FromImage(image);<br />
	IntPtr hdc = g.GetHdc();<br />
	SendMessage(handle, 0x0318 /*WM_PRINTCLIENT*/, hdc, (long)(0x00000010 | 0x00000004 | 0x00000002));<br />
	g.ReleaseHdc(hdc);<br />
	ReleaseDC(IntPtr.Zero, screenDC);<br />
	return image;<br />
}<br />

Please help me... i'm so confused Sigh | :sigh:

Sorry for my little english... i'm italian...

Judah Gabriel Himango6-Apr-06 5:40

sql command + datagridView Problem

6-Apr-06 5:40

Your question might be better asked in the ADO.NET[^] forum, since you're not asking for any C# code.

*edit* woops, looks like the forum board moved my message. This was originally in reply to "load + save ADO.NET"

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: How 'bout a little guitar now?
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

-- modified at 12:03 Thursday 6th April, 2006

mrkeivan6-Apr-06 5:14

mrkeivan

6-Apr-06 5:14

guys I have two problems with my report

1- I have 4 tables: university, major, sources and CD they all have universityCode in common, I looked alot to find the code that retrieves the following info from my tables
University.Name, Major.Major, Sources.Name, CD.Number
what's the sql select command for this ?

2- I'm using datagridView to show the results and when I get info from other tables I don't have any control over the header, I mean, because this is added to my grid I cannot set any names for the header, how can I deal with this problem ? D'Oh! | :doh:

Thanx
Mr.K

dbf database files import net2.0

hpetriffer6-Apr-06 4:44

hpetriffer

6-Apr-06 4:44

Hello,

I have to import dbf database files to my c# application. what is the best way to do that? I use vs2005 express and I have also the sqlexpress

Regards
Hansjörg

DataGrid in .net 1.1 and 2.0 ???

amin_behzadi6-Apr-06 4:41

amin_behzadi

6-Apr-06 4:41

I want to get the primary Key of the selected row in DataGridView when double clicked ...
You know in .net 1.1 we had a datagrid with DataKeyField property to save a special field of table like primary key field. but in DataGrid 2.0 or in DataGridView 2.0 this property disapeared...
Now! how can I get PK when a row selected ?

www.behzadi.net

-- modified at 10:43 Thursday 6th April, 2006

Re: DataGrid in .net 1.1 and 2.0 ???

NeelV7-Apr-06 2:49

NeelV

7-Apr-06 2:49

hi Use the DataKeyNames property to specify the field or fields that represent the primary key of the data source.

u can use this

Moving files programatically

naglbitur6-Apr-06 4:14

naglbitur

6-Apr-06 4:14

Hi there, I hope someone can help me regarding a windows form program.

I would like the user be able to press a button on the form and then an OpenFileDialog box opens, the user then selects a file that is at a certain location (similar to attaching a file when sending email). Then he presses another button on the form and a SaveFileDialog box appears letting the user select where he wants to save/move the file he just selected. How is this done? Can someone please help me?
I hope I have explained this clearly enough.
Thanks,

F

Re: Moving files programatically

Judah Gabriel Himango6-Apr-06 4:28

Re: Moving files programatically

6-Apr-06 4:28

Get the path of the file opened from the OpenFileDialog via openFileDialog.FileName. Store that file name in a variable, let's call it oldPath. In the save file dialog, after the user clicks OK, simply call System.IO.File.Move(oldPath, mySaveFileDialog.FileName);

naglbitur6-Apr-06 5:09

naglbitur

6-Apr-06 5:09

Thanks for your answer.
I see that File.Move takes as a parameter the source filename but what about the path? Does the dialog box take care of the path, where to save the file?
Thanks again for your help.

F

Re: Moving files programatically

Judah Gabriel Himango6-Apr-06 5:16