problems with user control

[Jason Winters]

I have implemented a user control in c# .net 2002 but the problem is that
the control keeps disappearing off of the form for no reason. I am not
making any changing to the form or the control. It disappears off of all
the forms that it is on. Any hints why this is happening?

[TT \(Tom Tempelaere\)]

Re: problems with user control

Jason,

"Jason Winters" <jwinq123@comca st.net> schreef in bericht
news:ycCdncAVjN iCAunfRVn-sw@comcast.com. ..[color=blue]
>I have implemented a user control in c# .net 2002 but the problem is that
>the control keeps disappearing off of the form for no reason. I am not
>making any changing to the form or the control. It disappears off of all
>the forms that it is on. Any hints why this is happening?[/color]


Can you post the code for the user control?

TT

[Jason Winters]

Re: problems with user control

using System;

using System.Collecti ons;

using System.Componen tModel;

using System.Drawing;

using System.Data;

using System.Windows. Forms;

namespace Biller

{

/// <summary>

/// Summary description for StoreSelector.

/// </summary>

public class StoreSelector : System.Windows. Forms.UserContr ol

{

private static int index;

public System.Windows. Forms.ComboBox comboBox1;

/// <summary>

/// Required designer variable.

/// </summary>

private System.Componen tModel.Containe r components = null;

public StoreSelector()

{

// This call is required by the Windows.Forms Form Designer.

InitializeCompo nent();


// TODO: Add any initialization after the InitForm call

}

public static void setIndex(int i)

{

index = i;

}

public static int getIndex()

{

return index;

}

public static Store getSelectedStor e()

{


return StoresCollectio n.getStoreAtInd ex(index);


}

private void storeList()

{

this.comboBox1. Items.Clear();

ArrayList stores = new ArrayList(Store sCollection.get Stores());

Object storesNames = new Object[stores.Count];

for(int x=0; x< stores.Count;x+ +)

{

this.comboBox1. Items.Add(((Sto re)stores[x]).storeName);

}


if(this.comboBo x1.Items.Count > 0)

this.comboBox1. SelectedIndex = index;



}

public void load()

{

try

{

this.storeList( );

this.comboBox1. SelectedIndex = index;

}

catch{}

}



/// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if(components != null)

{

components.Disp ose();

}

}

base.Dispose( disposing );

}

#region Component Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeCompo nent()

{

this.comboBox1 = new System.Windows. Forms.ComboBox( );

this.SuspendLay out();

//

// comboBox1

//

this.comboBox1. ItemHeight = 13;

this.comboBox1. Name = "comboBox1" ;

this.comboBox1. Size = new System.Drawing. Size(176, 21);

this.comboBox1. TabIndex = 0;

this.comboBox1. SelectedIndexCh anged += new
System.EventHan dler(this.combo Box1_SelectedIn dexChanged);

//

// StoreSelector

//

this.Controls.A ddRange(new System.Windows. Forms.Control[] {

this.comboBox1} );

this.Name = "StoreSelector" ;

this.Size = new System.Drawing. Size(176, 24);

this.Resize += new System.EventHan dler(this.Store Selector_Resize );

this.ResumeLayo ut(false);

}

#endregion

private void comboBox1_Selec tedIndexChanged (object sender, System.EventArg s
e)

{

index = this.comboBox1. SelectedIndex;

}

public void addSelectedEven t(System.EventH andler eh)

{

this.comboBox1. SelectedIndexCh anged += new System.EventHan dler(eh);


}

private void StoreSelector_R esize(object sender, System.EventArg s e)

{

this.comboBox1. Size = this.Size;

}

public void setSelectedInde x(int i)

{

this.comboBox1. SelectedIndex = i;

index = i;

}

}



}

[orekinbck@yahoo.com.au]

Re: problems with user control

Hi Jason

Firstly, I think that the Designer calls the constructor of your user
control when the designer displays the control. So, if you have any
errors in your constructor, then the designer will rip the control off
your form. In a way, the designer is like a moody teenager. It just
throws its hands in the air and says 'stuff this' !

I found that my designer settled right down when I did these things:
(1) Ensured that there is error handling in every user controls
constructor
(2) Put the user controls into their own project
(3) If I was going to change the user controls:
(a) Close any form that has the user controls on it
(b) Change the user controls in their own project
(c) Compile the user controls project
(d) Re-open any forms that have the user controls on them

Oh, one other thing I have found - changing from debug to release mode
(or vice versa) whilst you have a form open that contains user controls
..... has caused me problems as well.

Hope this Helps
Bill

[TT \(Tom Tempelaere\)]

Re: problems with user control

Jason,

"Jason Winters" <jwinq123@comca st.net> schreef in bericht
news:z4OdnYd4w6 drPenfRVn-pw@comcast.com. ..
[...]

There is one question: Where does the control disappear?

When you are designing the form, or at run time?

TT.

[TT \(Tom Tempelaere\)]

Re: problems with user control

Another thing I wouldn't do is making that 'index' static. I see no reason
for that.

TT

"Jason Winters" <jwinq123@comca st.net> schreef in bericht
news:z4OdnYd4w6 drPenfRVn-pw@comcast.com. ..[color=blue]
> using System;
>
> using System.Collecti ons;
>
> using System.Componen tModel;
>
> using System.Drawing;
>
> using System.Data;
>
> using System.Windows. Forms;
>
> namespace Biller
>
> {
>
> /// <summary>
>
> /// Summary description for StoreSelector.
>
> /// </summary>
>
> public class StoreSelector : System.Windows. Forms.UserContr ol
>
> {
>
> private static int index;
>
> public System.Windows. Forms.ComboBox comboBox1;
>
> /// <summary>
>
> /// Required designer variable.
>
> /// </summary>
>
> private System.Componen tModel.Containe r components = null;
>
> public StoreSelector()
>
> {
>
> // This call is required by the Windows.Forms Form Designer.
>
> InitializeCompo nent();
>
>
> // TODO: Add any initialization after the InitForm call
>
> }
>
> public static void setIndex(int i)
>
> {
>
> index = i;
>
> }
>
> public static int getIndex()
>
> {
>
> return index;
>
> }
>
> public static Store getSelectedStor e()
>
> {
>
>
> return StoresCollectio n.getStoreAtInd ex(index);
>
>
> }
>
> private void storeList()
>
> {
>
> this.comboBox1. Items.Clear();
>
> ArrayList stores = new ArrayList(Store sCollection.get Stores());
>
> Object storesNames = new Object[stores.Count];
>
> for(int x=0; x< stores.Count;x+ +)
>
> {
>
> this.comboBox1. Items.Add(((Sto re)stores[x]).storeName);
>
> }
>
>
> if(this.comboBo x1.Items.Count > 0)
>
> this.comboBox1. SelectedIndex = index;
>
>
>
> }
>
> public void load()
>
> {
>
> try
>
> {
>
> this.storeList( );
>
> this.comboBox1. SelectedIndex = index;
>
> }
>
> catch{}
>
> }
>
>
>
> /// <summary>
>
> /// Clean up any resources being used.
>
> /// </summary>
>
> protected override void Dispose( bool disposing )
>
> {
>
> if( disposing )
>
> {
>
> if(components != null)
>
> {
>
> components.Disp ose();
>
> }
>
> }
>
> base.Dispose( disposing );
>
> }
>
> #region Component Designer generated code
>
> /// <summary>
>
> /// Required method for Designer support - do not modify
>
> /// the contents of this method with the code editor.
>
> /// </summary>
>
> private void InitializeCompo nent()
>
> {
>
> this.comboBox1 = new System.Windows. Forms.ComboBox( );
>
> this.SuspendLay out();
>
> //
>
> // comboBox1
>
> //
>
> this.comboBox1. ItemHeight = 13;
>
> this.comboBox1. Name = "comboBox1" ;
>
> this.comboBox1. Size = new System.Drawing. Size(176, 21);
>
> this.comboBox1. TabIndex = 0;
>
> this.comboBox1. SelectedIndexCh anged += new
> System.EventHan dler(this.combo Box1_SelectedIn dexChanged);
>
> //
>
> // StoreSelector
>
> //
>
> this.Controls.A ddRange(new System.Windows. Forms.Control[] {
>
> this.comboBox1} );
>
> this.Name = "StoreSelector" ;
>
> this.Size = new System.Drawing. Size(176, 24);
>
> this.Resize += new System.EventHan dler(this.Store Selector_Resize );
>
> this.ResumeLayo ut(false);
>
> }
>
> #endregion
>
> private void comboBox1_Selec tedIndexChanged (object sender,
> System.EventArg s e)
>
> {
>
> index = this.comboBox1. SelectedIndex;
>
> }
>
> public void addSelectedEven t(System.EventH andler eh)
>
> {
>
> this.comboBox1. SelectedIndexCh anged += new System.EventHan dler(eh);
>
>
> }
>
> private void StoreSelector_R esize(object sender, System.EventArg s e)
>
> {
>
> this.comboBox1. Size = this.Size;
>
> }
>
> public void setSelectedInde x(int i)
>
> {
>
> this.comboBox1. SelectedIndex = i;
>
> index = i;
>
> }
>
> }
>
>
>
> }
>
>[/color]

[Jason Winters]

Re: problems with user control

Index does need to be static to get the effect I need

"TT (Tom Tempelaere)" </\/_0_$P@/\/\titi____AThotm ailD.Tcom/\/\@P$_0_/\/>
wrote in message news:bu5de.7848 3$X62.5092464@p hobos.telenet-ops.be...[color=blue]
> Another thing I wouldn't do is making that 'index' static. I see no reason
> for that.
>
> TT
>
> "Jason Winters" <jwinq123@comca st.net> schreef in bericht
> news:z4OdnYd4w6 drPenfRVn-pw@comcast.com. ..[color=green]
>> using System;
>>
>> using System.Collecti ons;
>>
>> using System.Componen tModel;
>>
>> using System.Drawing;
>>
>> using System.Data;
>>
>> using System.Windows. Forms;
>>
>> namespace Biller
>>
>> {
>>
>> /// <summary>
>>
>> /// Summary description for StoreSelector.
>>
>> /// </summary>
>>
>> public class StoreSelector : System.Windows. Forms.UserContr ol
>>
>> {
>>
>> private static int index;
>>
>> public System.Windows. Forms.ComboBox comboBox1;
>>
>> /// <summary>
>>
>> /// Required designer variable.
>>
>> /// </summary>
>>
>> private System.Componen tModel.Containe r components = null;
>>
>> public StoreSelector()
>>
>> {
>>
>> // This call is required by the Windows.Forms Form Designer.
>>
>> InitializeCompo nent();
>>
>>
>> // TODO: Add any initialization after the InitForm call
>>
>> }
>>
>> public static void setIndex(int i)
>>
>> {
>>
>> index = i;
>>
>> }
>>
>> public static int getIndex()
>>
>> {
>>
>> return index;
>>
>> }
>>
>> public static Store getSelectedStor e()
>>
>> {
>>
>>
>> return StoresCollectio n.getStoreAtInd ex(index);
>>
>>
>> }
>>
>> private void storeList()
>>
>> {
>>
>> this.comboBox1. Items.Clear();
>>
>> ArrayList stores = new ArrayList(Store sCollection.get Stores());
>>
>> Object storesNames = new Object[stores.Count];
>>
>> for(int x=0; x< stores.Count;x+ +)
>>
>> {
>>
>> this.comboBox1. Items.Add(((Sto re)stores[x]).storeName);
>>
>> }
>>
>>
>> if(this.comboBo x1.Items.Count > 0)
>>
>> this.comboBox1. SelectedIndex = index;
>>
>>
>>
>> }
>>
>> public void load()
>>
>> {
>>
>> try
>>
>> {
>>
>> this.storeList( );
>>
>> this.comboBox1. SelectedIndex = index;
>>
>> }
>>
>> catch{}
>>
>> }
>>
>>
>>
>> /// <summary>
>>
>> /// Clean up any resources being used.
>>
>> /// </summary>
>>
>> protected override void Dispose( bool disposing )
>>
>> {
>>
>> if( disposing )
>>
>> {
>>
>> if(components != null)
>>
>> {
>>
>> components.Disp ose();
>>
>> }
>>
>> }
>>
>> base.Dispose( disposing );
>>
>> }
>>
>> #region Component Designer generated code
>>
>> /// <summary>
>>
>> /// Required method for Designer support - do not modify
>>
>> /// the contents of this method with the code editor.
>>
>> /// </summary>
>>
>> private void InitializeCompo nent()
>>
>> {
>>
>> this.comboBox1 = new System.Windows. Forms.ComboBox( );
>>
>> this.SuspendLay out();
>>
>> //
>>
>> // comboBox1
>>
>> //
>>
>> this.comboBox1. ItemHeight = 13;
>>
>> this.comboBox1. Name = "comboBox1" ;
>>
>> this.comboBox1. Size = new System.Drawing. Size(176, 21);
>>
>> this.comboBox1. TabIndex = 0;
>>
>> this.comboBox1. SelectedIndexCh anged += new
>> System.EventHan dler(this.combo Box1_SelectedIn dexChanged);
>>
>> //
>>
>> // StoreSelector
>>
>> //
>>
>> this.Controls.A ddRange(new System.Windows. Forms.Control[] {
>>
>> this.comboBox1} );
>>
>> this.Name = "StoreSelector" ;
>>
>> this.Size = new System.Drawing. Size(176, 24);
>>
>> this.Resize += new System.EventHan dler(this.Store Selector_Resize );
>>
>> this.ResumeLayo ut(false);
>>
>> }
>>
>> #endregion
>>
>> private void comboBox1_Selec tedIndexChanged (object sender,
>> System.EventArg s e)
>>
>> {
>>
>> index = this.comboBox1. SelectedIndex;
>>
>> }
>>
>> public void addSelectedEven t(System.EventH andler eh)
>>
>> {
>>
>> this.comboBox1. SelectedIndexCh anged += new System.EventHan dler(eh);
>>
>>
>> }
>>
>> private void StoreSelector_R esize(object sender, System.EventArg s e)
>>
>> {
>>
>> this.comboBox1. Size = this.Size;
>>
>> }
>>
>> public void setSelectedInde x(int i)
>>
>> {
>>
>> this.comboBox1. SelectedIndex = i;
>>
>> index = i;
>>
>> }
>>
>> }
>>
>>
>>
>> }
>>
>>[/color]
>
>[/color]