Re: running function in Form from UserControl - C# Discussion Boards

31-Jul-03 2:23

Hi there!
I've made a UserContol for my app. for modifing records in my form! SO i have new, delete & ... buttons in my UserControl but I wanna fire the AddRecord, DeleteRecord & ... functions from my Form! I mean functions are in my form but I want to fire them by clicking UserContol buttons.

How can I do this?!
Any help appreciated!

Always, Hovik.
(forgive my English)

Rampas Tomas31-Jul-03 3:09

31-Jul-03 3:09

Hello,
you can Add an custom events and delegates to your UserControl which will be trigged when user clicks button in your UserControl. In your Form you can register delegate method for the UserControl event which will be responsible for event processing.

T.

Hovik Melkomian3-Aug-03 3:40

3-Aug-03 3:40

Hi there & tnx for ur reply dear:
I know what u told but JUST in Theory!!! can u help me to make it?!?!
A simple sample or some codes will be OK;)
Can u help me?!
tnx again & hope to hear from u ASAP!

Always,
Hovik Melkomian.

Rampas Tomas3-Aug-03 22:34

3-Aug-03 22:34

OK, here is the code snippet:
First, in you CustomControl we define an event:

namespace MyControlLibry
{

class MyControl : UserControl
{
public event MyControlEvent ModeChanged;

public MyControl()
{
}

// If user clicked on Insert button it cause trigger new ModeChanged event:
public ButtonInsertClick(object sender, System.EventArgs ea)
{
if (myevent != null)
ModeChanged(this, new MyCustomEventArgs("INSERT"));
}
}

// function prototype
public delgate void MyControlEventHandler(object sender, MyCustomEventArgs mcea);

// custom event args
public class MyCustomEventArgs: SystemEventArgs
{
private string stxt;
public MyCustomEventArgs(string text)
{
stxt = text;
}

public string MyCustomText
{
get { return stxt;}
set { stxt = value;}
}
}
}

Finally in you Form you must define event handler:

public class MyForm : Form
{
private MyControl ctrl;

public MyForm()
{
ctrl.ModeChanged = new MyControlEventHandler(CustomModeChanged);

}
// CustomModeChanged must have the same signature as delegate so
public void CustomModeChanged(object sender, MyCustomEventArgs mea)
{
Console.WriteLine(mea.MyCustomText);
}
}

Hope it helps

Tomas Rampas
------------------------------
gedas CR s.r.o.
System analyst, MCP
TGM 840,
293 01 Mlada Boleslav,
Czech Republic
Telefon/phone +420(326)711411
Telefax/fax +420(326)711420
rampas@gedas.cz
http://www.gedas.com/
------------------------------

To be or not to be is true...
George Bool

Hovik Melkomian4-Aug-03 3:54

4-Aug-03 3:54

dear friend:
tnx for ur reply indeed, u can think that im silly but I couldn't do it Cry | :((

now im sending my UserContol Code & if its possible tell mo how to do that!?
I'll really be thankfull!

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;

namespace Dabir
{
///

/// Summary description for UserControl1.
///

public class ArrowControl : System.Windows.Forms.UserControl
{
private System.Windows.Forms.Panel panel1;
private System.ComponentModel.IContainer components;
private System.Windows.Forms.Button buttonLast;
private System.Windows.Forms.Button buttonNext;
private System.Windows.Forms.Button buttonPrev;
private System.Windows.Forms.Button buttonFirst;
private System.Windows.Forms.ToolTip toolTip;
private System.Windows.Forms.Button buttonNew;
private System.Windows.Forms.Button buttonDelete;
private System.Windows.Forms.Button buttonEdit;
private System.Windows.Forms.Button buttonSearch;
private System.Windows.Forms.Button buttonFilter;
private System.Windows.Forms.Button buttonSort;
private System.Windows.Forms.Button buttonOk;
private System.Windows.Forms.Button buttonCancel;
//My Var
public BindingManagerBase UCBinder;
public DataSet UCDataSet;
public string UCAction;
private bool InEditMode;
//events
public event AddNewRecord NewRecord;
public delegate void MyControEventHandeler(object sender, MyCustomEventArgs mcea);

public ArrowControl()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();

// TODO: Add any initialization after the InitComponent call
InEditMode = false;

}

///

/// Clean up any resources being used.
///

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

#region Component Designer generated code
///

/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///

private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(ArrowControl));
this.panel1 = new System.Windows.Forms.Panel();
this.buttonOk = new System.Windows.Forms.Button();
this.buttonFilter = new System.Windows.Forms.Button();
this.buttonSearch = new System.Windows.Forms.Button();
this.buttonEdit = new System.Windows.Forms.Button();
this.buttonCancel = new System.Windows.Forms.Button();
this.buttonNew = new System.Windows.Forms.Button();
this.buttonFirst = new System.Windows.Forms.Button();
this.buttonPrev = new System.Windows.Forms.Button();
this.buttonNext = new System.Windows.Forms.Button();
this.buttonLast = new System.Windows.Forms.Button();
this.buttonDelete = new System.Windows.Forms.Button();
this.buttonSort = new System.Windows.Forms.Button();
this.toolTip = new System.Windows.Forms.ToolTip(this.components);
this.panel1.SuspendLayout();
this.SuspendLayout();
//
// panel1
//
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.panel1.Controls.Add(this.buttonOk);
this.panel1.Controls.Add(this.buttonFilter);
this.panel1.Controls.Add(this.buttonSearch);
this.panel1.Controls.Add(this.buttonEdit);
this.panel1.Controls.Add(this.buttonCancel);
this.panel1.Controls.Add(this.buttonNew);
this.panel1.Controls.Add(this.buttonFirst);
this.panel1.Controls.Add(this.buttonPrev);
this.panel1.Controls.Add(this.buttonNext);
this.panel1.Controls.Add(this.buttonLast);
this.panel1.Controls.Add(this.buttonDelete);
this.panel1.Controls.Add(this.buttonSort);
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location = new System.Drawing.Point(0, 0);
this.panel1.Name = "panel1";
this.panel1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.panel1.Size = new System.Drawing.Size(248, 88);
this.panel1.TabIndex = 4;
//
// buttonOk
//
this.buttonOk.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonOk.BackgroundImage")));
this.buttonOk.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonOk.Location = new System.Drawing.Point(8, 8);
this.buttonOk.Name = "buttonOk";
this.buttonOk.Size = new System.Drawing.Size(32, 32);
this.buttonOk.TabIndex = 5;
this.toolTip.SetToolTip(this.buttonOk, "تاييد");
//
// buttonFilter
//
this.buttonFilter.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonFilter.BackgroundImage")));
this.buttonFilter.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonFilter.Location = new System.Drawing.Point(208, 48);
this.buttonFilter.Name = "buttonFilter";
this.buttonFilter.Size = new System.Drawing.Size(32, 32);
this.buttonFilter.TabIndex = 6;
this.toolTip.SetToolTip(this.buttonFilter, "فيلتر");
this.buttonFilter.Click += new System.EventHandler(this.buttonFilter_Click);
//
// buttonSearch
//
this.buttonSearch.BackColor = System.Drawing.SystemColors.Control;
this.buttonSearch.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonSearch.BackgroundImage")));
this.buttonSearch.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonSearch.Location = new System.Drawing.Point(8, 48);
this.buttonSearch.Name = "buttonSearch";
this.buttonSearch.Size = new System.Drawing.Size(32, 32);
this.buttonSearch.TabIndex = 11;
this.toolTip.SetToolTip(this.buttonSearch, "جستجو");
//
// buttonEdit
//
this.buttonEdit.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonEdit.BackgroundImage")));
this.buttonEdit.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonEdit.Location = new System.Drawing.Point(48, 48);
this.buttonEdit.Name = "buttonEdit";
this.buttonEdit.Size = new System.Drawing.Size(32, 32);
this.buttonEdit.TabIndex = 10;
this.toolTip.SetToolTip(this.buttonEdit, "ويرايش");
this.buttonEdit.Click += new System.EventHandler(this.buttonEdit_Click);
//
// buttonCancel
//
this.buttonCancel.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonCancel.BackgroundImage")));
this.buttonCancel.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonCancel.Font = new System.Drawing.Font("Tahoma", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(178)));
this.buttonCancel.Location = new System.Drawing.Point(208, 8);
this.buttonCancel.Name = "buttonCancel";
this.buttonCancel.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.buttonCancel.Size = new System.Drawing.Size(32, 32);
this.buttonCancel.TabIndex = 0;
this.toolTip.SetToolTip(this.buttonCancel, "برگشت");
this.buttonCancel.Click += new System.EventHandler(this.buttonCancel_Click);
//
// buttonNew
//
this.buttonNew.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonNew.BackgroundImage")));
this.buttonNew.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonNew.Location = new System.Drawing.Point(88, 48);
this.buttonNew.Name = "buttonNew";
this.buttonNew.Size = new System.Drawing.Size(32, 32);
this.buttonNew.TabIndex = 9;
this.toolTip.SetToolTip(this.buttonNew, "جديد");
//
// buttonFirst
//
this.buttonFirst.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonFirst.BackgroundImage")));
this.buttonFirst.Cursor = System.Windows.Forms.Cursors.Default;
this.buttonFirst.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonFirst.Location = new System.Drawing.Point(48, 8);
this.buttonFirst.Name = "buttonFirst";
this.buttonFirst.Size = new System.Drawing.Size(32, 32);
this.buttonFirst.TabIndex = 4;
this.toolTip.SetToolTip(this.buttonFirst, "رکورد اول");
this.buttonFirst.Click += new System.EventHandler(this.buttonFirst_Click);
//
// buttonPrev
//
this.buttonPrev.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonPrev.BackgroundImage")));
this.buttonPrev.Cursor = System.Windows.Forms.Cursors.Default;
this.buttonPrev.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonPrev.Location = new System.Drawing.Point(88, 8);
this.buttonPrev.Name = "buttonPrev";
this.buttonPrev.Size = new System.Drawing.Size(32, 32);
this.buttonPrev.TabIndex = 3;
this.toolTip.SetToolTip(this.buttonPrev, "رکورد قبلي");
this.buttonPrev.Click += new System.EventHandler(this.buttonPrev_Click);
//
// buttonNext
//
this.buttonNext.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonNext.BackgroundImage")));
this.buttonNext.Cursor = System.Windows.Forms.Cursors.Default;
this.buttonNext.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonNext.Location = new System.Drawing.Point(128, 8);
this.buttonNext.Name = "buttonNext";
this.buttonNext.Size = new System.Drawing.Size(32, 32);
this.buttonNext.TabIndex = 2;
this.toolTip.SetToolTip(this.buttonNext, "رکورد بعدي");
this.buttonNext.Click += new System.EventHandler(this.buttonNext_Click);
//
// buttonLast
//
this.buttonLast.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonLast.BackgroundImage")));
this.buttonLast.Cursor = System.Windows.Forms.Cursors.Default;
this.buttonLast.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonLast.Location = new System.Drawing.Point(168, 8);
this.buttonLast.Name = "buttonLast";
this.buttonLast.Size = new System.Drawing.Size(32, 32);
this.buttonLast.TabIndex = 1;
this.toolTip.SetToolTip(this.buttonLast, "رکورد آخر");
this.buttonLast.Click += new System.EventHandler(this.buttonLast_Click);
//
// buttonDelete
//
this.buttonDelete.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonDelete.BackgroundImage")));
this.buttonDelete.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonDelete.Location = new System.Drawing.Point(128, 48);
this.buttonDelete.Name = "buttonDelete";
this.buttonDelete.Size = new System.Drawing.Size(32, 32);
this.buttonDelete.TabIndex = 8;
this.toolTip.SetToolTip(this.buttonDelete, "حذف");
//
// buttonSort
//
this.buttonSort.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("buttonSort.BackgroundImage")));
this.buttonSort.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonSort.Location = new System.Drawing.Point(168, 48);
this.buttonSort.Name = "buttonSort";
this.buttonSort.Size = new System.Drawing.Size(32, 32);
this.buttonSort.TabIndex = 7;
this.toolTip.SetToolTip(this.buttonSort, "ترتيب");
//
// ArrowControl
//
this.Controls.Add(this.panel1);
this.Font = new System.Drawing.Font("Tahoma", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(178)));
this.Name = "ArrowControl";
this.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.Size = new System.Drawing.Size(248, 88);
this.panel1.ResumeLayout(false);
this.ResumeLayout(false);

}
#endregion

private void buttonLast_Click(object sender, System.EventArgs e)
{
UCBinder.Position = UCBinder.Count-1;
FirstRec(false);
LastRec(true);
}

private void buttonNext_Click(object sender, System.EventArgs e)
{
if(UCBinder.Position < UCBinder.Count-1)
{
UCBinder.Position++;
LastRec(false);
FirstRec(false);
}
else
LastRec(true);
}

private void buttonPrev_Click(object sender, System.EventArgs e)
{
if(UCBinder.Position > 0)
{
UCBinder.Position--;
FirstRec(false);
LastRec(false);
}
else
FirstRec(true);
}
private void buttonFirst_Click(object sender, System.EventArgs e)
{
UCBinder.Position = 0;
FirstRec(true);
LastRec(false);
}

private void FirstRec(bool able)
{
buttonFirst.Enabled = !able;
buttonPrev.Enabled = !able;
}
private void LastRec(bool able)
{
buttonLast.Enabled = !able;
buttonNext.Enabled = !able;
}

private void buttonCancel_Click(object sender, System.EventArgs e)
{
...
}

private void buttonFilter_Click(object sender, System.EventArgs e)
{
...
}

private void buttonEdit_Click(object sender, System.EventArgs e)
{
...
}
}
}

Always,
Hovik Melkomian.

Rampas Tomas4-Aug-03 4:38

4-Aug-03 4:38

You have almost everything, but you have to add a couple of things:
1. You must provide definition for the MyCustomEventArgs (look at my previous exmple)
2. Define click event method for buttonNew button, and in this method call :

private void buttonNew_Click(object sender, System.EventArgs se)
{
if(NewRecord != null)
NewRecord(this, new MyCustomEventArgs());
}
3. According to me, it would be better to remove the delegate outside the class definition ( place it simply in dabir namespace )

4. Finally in your form where you are using your custom control register the appropriate method with similar signature as the delegate have.

//ArrowControl definition
ArrowControl ctrl = new ArrowControl();

//Form construktor
public MyForm()
{
ctrl.NewRecord += new MyControEventHandeler(NewRecordHandler);
}

public void NewRecordHandler(object sender, MyCustomEventArgs e)
{
// do appropriate things with new record Smile | :)

}

Tomas Rampas
------------------------------
gedas CR s.r.o.
System analyst, MCP
TGM 840,
293 01 Mlada Boleslav,
Czech Republic
Telefon/phone +420(326)711411
Telefax/fax +420(326)711420
rampas@gedas.cz
http://www.gedas.com/
------------------------------

To be or not to be is true...
George Bool

Hovik Melkomian4-Aug-03 4:53

4-Aug-03 4:53

Dear Tomas:
As I guess, my problem is in UserControl! so if I make it clear the rest will be ok (i hope Wink | ;)

) I told u where is my problems.
So, Could u plz do it for me Blush | :O

(u have my code) or tell me more, it might be rude but im really sorry Hmmm | :|

Please...I'll be thankful.

lookig to hear from u ASAP!
Always, Hovik.

Hovik Melkomian4-Aug-03 4:22

4-Aug-03 4:22

Dear freind:
I add ur code to UserContol but it gives me error for not defined namespace. Frown | :(

These r my errors:

The type or namespace name 'MyContolEvent' could not be found<br />
The type or namespace name 'MyCustomEventArgs' could not be found<br />
The type or namespace name 'SystemEventArgs' could not be found

Please help me to figure it out!

Im looking to hear from u ASAP
Always,
Hovik.

Rampas Tomas4-Aug-03 4:48

4-Aug-03 4:48

OK, this is some typos Smile | :)

SystemEventArgs shoud be System.EventArgs ( sorry for that)
the declaration public event MyControlEvent ModeChanged; should be public event MyControlEventHandler ModeChanged;

Sorry, my fingers are quicker than my brain Smile | :)

T.

Tomas Rampas
------------------------------
gedas CR s.r.o.
System analyst, MCP
TGM 840,
293 01 Mlada Boleslav,
Czech Republic
Telefon/phone +420(326)711411
Telefax/fax +420(326)711420
rampas@gedas.cz
http://www.gedas.com/
------------------------------

To be or not to be is true...
George Bool

Hovik Melkomian4-Aug-03 5:13

4-Aug-03 5:13

Ok Tomas:
Third problem has gone but the rest still are breathing!!!
Please HELP?!?! Mad | :mad:

What shoudl I do?!?!? Confused | :confused:

Always, Hovik.

Hovik Melkomian16-Aug-03 6:28