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Maintaining State on Control Property
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Jay Chapman
Hey guys-

I am trying to do a simple custom web control. I want a textbox with a tag
property that maintains it's tag (if programmatically changed) between page
requests. How can I get the tag property to maintain its state?

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

Imports System.Web.UI.WebControls

Public Class TagTextbox
Inherits TextBox
Private strTag As String
Public Property Tag() As String
Get
Tag = strTag
End Get
Set(ByVal str As String)
strTag = str
End Set
End Property

End Class

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

thanks,

Jay Chapman
BCA Technologies, Inc.
407.659.0653 x326
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Susan Warren
Super simple, Jay:

Public Property Tag() As String
Get
Dim o as Object =3D ViewState("tag")
        If o Is Nothing Then
            Return String.Empty
        End If
        Return CStr(o)
End Get
Set(ByVal str As String)
ViewState("tag") =3D str
End Set
End Property

You can also search help for "ViewState"-- there's an example the shows =
exactly this.

-----Original Message-----
From: Jay Chapman [mailto:Click here to reveal e-mail address]
Sent: Tuesday, November 06, 2001 2:25 PM
To: aspngcontrolsvb
Subject: [aspngcontrolsvb] Maintaining State on Control Property

Hey guys-

I am trying to do a simple custom web control. I want a textbox with a =
tag
property that maintains it's tag (if programmatically changed) between =
page
requests. How can I get the tag property to maintain its state?

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

Imports System.Web.UI.WebControls

Public Class TagTextbox
Inherits TextBox
Private strTag As String
Public Property Tag() As String
Get
Tag =3D strTag
End Get
Set(ByVal str As String)
strTag =3D str
End Set
End Property

End Class

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

thanks,

Jay Chapman
BCA Technologies, Inc.
407.659.0653 x326
Click here to reveal e-mail address
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.295 / Virus Database: 159 - Release Date: 11/1/2001

| [aspngcontrolsvb] member Click here to reveal e-mail address =3D YOUR ID
| http://www.asplists.com/asplists/aspngcontrolsvb.asp =3D JOIN/QUIT
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Reply to this message...
 
    
Jay Chapman
Susan,

thanks for the tip! That is easy. Is there much overhead associated with
doing this? I mean, should I create properties that maintain state with
reckless abandon in this way, or should it be kept to a minimum to get the
job done...?

thanks,

Jay

[Original message clipped]

Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.295 / Virus Database: 159 - Release Date: 11/1/2001
Reply to this message...
 
    
Susan Warren
Your users will appreciate restraint, but properties with simple types =
(ints, strings) usually don't contribute much to the bottom line, =
viewstate-wise. I'd avoid putting big, complex objects (like DataSets) =
into viewstate. But in controls we ship, most of the properties that =
are commonly set have their values round-tripped in viewstate.

hth,
Susan

-----Original Message-----
From: Jay Chapman [mailto:Click here to reveal e-mail address]
Sent: Wednesday, November 07, 2001 6:42 AM
To: aspngcontrolsvb
Subject: [aspngcontrolsvb] RE: Maintaining State on Control Property

Susan,

thanks for the tip! That is easy. Is there much overhead associated with
doing this? I mean, should I create properties that maintain state with
reckless abandon in this way, or should it be kept to a minimum to get =
the
job done...?

thanks,

Jay

[Original message clipped]

Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.295 / Virus Database: 159 - Release Date: 11/1/2001

| [aspngcontrolsvb] member Click here to reveal e-mail address =3D YOUR ID
| http://www.asplists.com/asplists/aspngcontrolsvb.asp =3D JOIN/QUIT
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Reply to this message...
 
 
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