QUESTION IS

Update datagrid in a MDI child from a MDI child!!!URGENT HELP REQUIRED!!!

24-Jun-05 1:27

Sorry,

But I'm already engaged! Big Grin | :-D

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Image Processing

CYMA23-Jun-05 7:19

CYMA

23-Jun-05 7:19

In fingerprint recognition
the first step is core point detection
Centerpoint location is done to find the point of most curvature by determining the normal of each fingerprint ridge.and then following them inwards towards the center.

QUESTION IS

Now I want to ask How can I implemant
2-D Guassian Lowpass Wiener Filter to finger print Confused | :confused:

How can I divide the input fingerprint image into non-overlapping block of sze 10*10 Confused | :confused:

????

cyma

GianlucaSeno23-Jun-05 7:09

GianlucaSeno

23-Jun-05 7:09

In brief...I've a MDI application with this MDI childs(at the moment all MDI childs are closed):
1)MDIFORM (MDI container)
2)FORM1 (MDI form child)
3)FORM2 (MDI form child)
I press a menu on MDIFORM that opens FORM1.

In FORM1 there is a texbox.
On keyPress event of textbox I write in a MSAccess table what I'm writing in the textbox.
On Load event of FORM1 I open FORM2 where is a datagrid.
The code is:

public class FORM1: System.Windows.Forms.Form
{
private FORM2 form2=null;
private void FORM1_Load(object sender, System.EventArgs e)
{
if (this.form2==null)
{
this.form2=new FORM2();
this.form2.MdiParent=this.MdiParent;
}
this.form2.Show();
}
private void InsertString(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
// -- INSERT DB
}
}

In FORM2 I've a datagrid where I show results written before in last MSAccess table.The code is this:

public class FORM2 : System.Windows.Forms.Form
{
private System.ComponentModel.Container components = null;
private System.Windows.Forms.DataGrid dataPreResult;

public FORM2()
{
InitializeComponent();
}

protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
private void InitializeComponent()
{
this.dataPreResult = new System.Windows.Forms.DataGrid();
((System.ComponentModel.ISupportInitialize)(this.dataPreResult)).BeginInit();
this.SuspendLayout();
//
// dataPreResult
//
this.dataPreResult.AllowSorting = false;
this.dataPreResult.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.dataPreResult.DataMember = "";
this.dataPreResult.Dock = System.Windows.Forms.DockStyle.Fill;
this.dataPreResult.Font = new System.Drawing.Font("Verdana", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.dataPreResult.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataPreResult.Location = new System.Drawing.Point(0, 0);
this.dataPreResult.Name = "dataPreResult";
this.dataPreResult.ReadOnly = true;
this.dataPreResult.RowHeaderWidth = 10;
this.dataPreResult.Size = new System.Drawing.Size(232, 613);
this.dataPreResult.TabIndex = 0;
//
// FORM2
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(232, 613);
this.Controls.Add(this.dataPreResult);
this.Location = new System.Drawing.Point(600, 10);
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "FORM2";
this.ShowInTaskbar = false;
this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
this.Load += new System.EventHandler(this.StringPreResult_Load);
((System.ComponentModel.ISupportInitialize)(this.dataPreResult)).EndInit();
this.ResumeLayout(false);
}
#endregion

public void StringPreResult_Load(object sender, System.EventArgs e)
{
ReadResults();
}

public void ReadResults()
{
OleDbDataAdapter da = new OleDbDataAdapter();
OleDbConnection con =new OleDbConnection();
OleDbCommand cmd = new OleDbCommand();
DataTable dt =new DataTable();
dt.Clear();
con.ConnectionString=<connectionstring>;
con.Open();
cmd.Connection = con;
cmd.CommandText = "SELECT * FROM TABLE";

da.SelectCommand = cmd;
da.Fill(dt);

dataPreResult.SetDataBinding(dt,"");

cmd.Cancel();
con.Close();
}

}

So now, my problems is: how can update datagrid in FORM2 from FORM1 when I call keypress event on FORM1 textbox(InsertString in example code)?

Thanks for any help!!! Big Grin | :-D

Re: Update datagrid in a MDI child from a MDI child!!!URGENT HELP REQUIRED!!!

Bojan Rajkovic23-Jun-05 9:55

Bojan Rajkovic

23-Jun-05 9:55

Uh...What you need to do is maybe set a timer in form 2 to refresh the data in the datagrid..
I have an app that I do something similar in, and all you need to do is call ReadResults() and do dataPreResult.Invalidate() (to make sure that it gets redrawn) every so often..I'm not 100% sure on that, but it should work.

Here's the relevant code:

Timer updateDataGrid = new Timer(); // add this to your object declarations<br />
<br />
public FORM2()<br />
{<br />
	InitializeComponent();<br />
	updateDataGrid.Interval = 60*1000;<br />
	updateDataGrid.Tick += new EventHandler(doUpdate);<br />
	updateDataGrid.Start(); // add the above 3 lines in the constructor to set the interval, the 				    handler for the timer firing and to start it. updating every minute 					    seems like a good time, but you can change that<br />
}<br />
<br />
private void doUpdate(object sender, EventArgs e)<br />
{<br />
	ReadResults();<br />
	dataPreResult.Invalidate();<br />
}

Re: Update datagrid in a MDI child from a MDI child!!!URGENT HELP REQUIRED!!!

GianlucaSeno23-Jun-05 10:05

GianlucaSeno

23-Jun-05 10:05

No way...nothing happens... Sigh | :sigh:

DateTime.Parse / ParseExact

trevor_moody23-Jun-05 6:32

trevor_moody

23-Jun-05 6:32

Hello folks,

can anyone help me before i chuck my monitor accross the room. I need to convert the string "20050401" to a datetime of April 01, 2005, but i can't get it to work. He's my latest effort.

DateTime.ParseExact("20050401", "YYYYMMDD", null)

Any ideas?

Re: DateTime.Parse / ParseExact

Dave Kreskowiak23-Jun-05 8:58

23-Jun-05 8:58

Next time, save yourself the headache and read the documentation on the function your trying to use first. You're using the wrong format string and you can't pass null for the IFormatProvider parameter.

DateTime.ParseExact("20050401", "yyyyMMdd", Application.CurrentCulture.DateTimeFormat);

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

TextBox in ASP.NET

BECK723-Jun-05 6:32

23-Jun-05 6:32

Hi, i need help!

I have a value on a textbox, but this textbox is visible= false. So, when i go to another page using Server.Transfer and i try to access it by Request.Form["TextBox] the page CANT see the value. What can i do?What control can i use to do this?

PD:The requirements dont let use Request.QueryString.

Thanks for ur help

BECK 7

Dave Kreskowiak23-Jun-05 8:59

23-Jun-05 8:59

Your questions really belongs in the ASP.NET Forum[^].

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

BECK723-Jun-05 9:30

23-Jun-05 9:30

well, i am talking about c# in asp.net

BECK 7

DavidNohejl23-Jun-05 9:43

DavidNohejl

23-Jun-05 9:43

hmm but the fact that because textbox is not rendered into page (because visible=false), so you obviously can't acces it's value is not about C#, it's about IQ.

David

David's thoughts / dnhsoftware.org / MyHTMLTidy

BECK723-Jun-05 11:49

23-Jun-05 11:49

So, u mean there is no way i can get a value from a page to another? except with Session?

BECK 7

DavidNohejl23-Jun-05 11:53

DavidNohejl

23-Jun-05 11:53

I didn't say that. I said why your solution failed Smile | :)

You can have <input type="hidden" value="pass_me_to_other_form" /> That way, you can acess its value same way as you tried with textbox.

David

"Stay Kul And Happy" I.A.

Dave Kreskowiak23-Jun-05 10:10

23-Jun-05 10:10

No, you're not talking about C# at all. You're talking about a TextBox on an ASP.NET Web Form. It doesn't matter what language your using, the problem is still the same.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

BECK723-Jun-05 10:32