PBWMan
asked on
Retaining values on postback
I have a repeater control.
on every postback, I do the following in my aspx.vb :
rptListing.HeaderTemplate = New RenderExecutionResourceLis
rptListing.ItemTemplate = New RenderExecutionResourceLis
rptListing.AlternatingItem
rptListing.FooterTemplate = New RenderExecutionResourceLis
--Databinding() call happens here
--------------------------
Public Class RenderExecutionResourceLis
Implements ITemplate
Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements System.Web.UI.ITemplate.In
Dim lc As New Literal
Select Case TemplateType
Case ListItemType.Header
lc.Text = "<Table border=0 cellpadding=1 cellspacing=1 "
lc.Text &= "class=ToDoListTable width=100%>"
lc.Text &= "<tr>"................. and so on
Case ListItemType.Item
AddHandler lc.DataBinding, AddressOf ExecutionResourceListItem_
Case ListItemType.AlternatingIt
AddHandler lc.DataBinding, AddressOf ExecutionResourceListAltIt
Case ListItemType.Footer
lc.Text = "</table>"
End Select
container.Controls.Add(lc)
End Sub
--------------------------
Private Sub ExecutionResourceListItem_
Dim lc As Literal
lc = CType(sender, Literal)
Dim container As RepeaterItem
container = CType(lc.NamingContainer, RepeaterItem)
Dim currID As String
currID = CType(DataBinder.Eval(cont
lc.Text = "<tr id=row" & currID & ">"
lc.Text &= "<input type=text size=6 id=""txtAS" & currID & """ class=""smalltextleft"" value=" & DataBinder.Eval(container.
lc.Text &= "</td></tr>"
End Sub
End Class
--------------------------
As you can see, I cant put these values in session variables since there could be 1 record or 500.
And I tried using server controls, but they are too expensive - page takes pretty long to load.
The user will be entering his date and could sort or something that would cause the page to postback.
I need to save the dates.
Any ideas ????
on every postback, I do the following in my aspx.vb :
rptListing.HeaderTemplate = New RenderExecutionResourceLis
rptListing.ItemTemplate = New RenderExecutionResourceLis
rptListing.AlternatingItem
rptListing.FooterTemplate = New RenderExecutionResourceLis
--Databinding() call happens here
--------------------------
Public Class RenderExecutionResourceLis
Implements ITemplate
Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements System.Web.UI.ITemplate.In
Dim lc As New Literal
Select Case TemplateType
Case ListItemType.Header
lc.Text = "<Table border=0 cellpadding=1 cellspacing=1 "
lc.Text &= "class=ToDoListTable width=100%>"
lc.Text &= "<tr>"................. and so on
Case ListItemType.Item
AddHandler lc.DataBinding, AddressOf ExecutionResourceListItem_
Case ListItemType.AlternatingIt
AddHandler lc.DataBinding, AddressOf ExecutionResourceListAltIt
Case ListItemType.Footer
lc.Text = "</table>"
End Select
container.Controls.Add(lc)
End Sub
--------------------------
Private Sub ExecutionResourceListItem_
Dim lc As Literal
lc = CType(sender, Literal)
Dim container As RepeaterItem
container = CType(lc.NamingContainer, RepeaterItem)
Dim currID As String
currID = CType(DataBinder.Eval(cont
lc.Text = "<tr id=row" & currID & ">"
lc.Text &= "<input type=text size=6 id=""txtAS" & currID & """ class=""smalltextleft"" value=" & DataBinder.Eval(container.
lc.Text &= "</td></tr>"
End Sub
End Class
--------------------------
As you can see, I cant put these values in session variables since there could be 1 record or 500.
And I tried using server controls, but they are too expensive - page takes pretty long to load.
The user will be entering his date and could sort or something that would cause the page to postback.
I need to save the dates.
Any ideas ????
gregoryyoung
I just answerre this question under another topic. The inputs are sent back during postback and are available through the request object.
what are you actually want to store in the session obejcts ? why don't you store the whole datasource object in the session obejct
after each operation ( sort, delete or whatever ) you can set the result datasource in the session and then get it
as gregoryyoung said you can get the variables from the request.form collection but as you use repeater control the keys are not normalized e.g. repeater:_ctl0:literal0
HTH
B..M
after each operation ( sort, delete or whatever ) you can set the result datasource in the session and then get it
as gregoryyoung said you can get the variables from the request.form collection but as you use repeater control the keys are not normalized e.g. repeater:_ctl0:literal0
HTH
B..M
incorrect B..M the values in question are being outputted as html <input>
lc.Text &= "<input type=text size=6 id=""txtAS" & currID & """ class=""smalltextleft"" value=" & DataBinder.Eval(container.
lc.Text &= "<input type=text size=6 id=""txtAS" & currID & """ class=""smalltextleft"" value=" & DataBinder.Eval(container.
:-) gregoryyoung, so why don't you try to accept them directly to see if you will grab them as they are nested controls in the repeater web control ;-)
B..M
B..M
use session variables! An easy solution
B..M are you suggesting that .net is going in and finding his html string (placed in a literal) locating his ID= and changing it to something else ?! He does not need to access the literal control as you suggest only the actual value which was stored in the input. I would be willing to wager a significant amount of money that this is producing html with the <input> named as he has it. Renaming does not happen on text within literals I am POSITIVE of this... Of course although MSDN will back me up I am sure PBWMan could tell us for sure ...
As for Session variables they are fairly easy they are a bit of a waste of resources it being the page is taking the time and bandwith to upload these values back to the server. Also if someone were in process of editting only the request object would know of this edit.
btw: thanks B..M I have accepted numerous LITERAL controls output through repeaters nested controls etc. Remember that a LITERAL writes its output directly and is not subject to things like you mention.
As for Session variables they are fairly easy they are a bit of a waste of resources it being the page is taking the time and bandwith to upload these values back to the server. Also if someone were in process of editting only the request object would know of this edit.
btw: thanks B..M I have accepted numerous LITERAL controls output through repeaters nested controls etc. Remember that a LITERAL writes its output directly and is not subject to things like you mention.
ASKER
Gregoryyoung is right.
Im returning my entire table, tr, td and textboxes in plain HTML.
The user sees 50-100 rows of data and each row has a textbox.
When the user clicks the textbox, a calendar pops up and the user can select his date.
When he does this, the corresponding row has a checkbox which gets checked.
I want to save these date values as they are on every postback.
For example, the user selects 5 dates for 5 rows, and then sorts a particular column header.
My code will postback and will then build this entire HTML again - so basically I lose all the user entered data.
I cant store these values in session - since there can be as many as 500 rows.
I hope you'll understand my question better now.
Im returning my entire table, tr, td and textboxes in plain HTML.
The user sees 50-100 rows of data and each row has a textbox.
When the user clicks the textbox, a calendar pops up and the user can select his date.
When he does this, the corresponding row has a checkbox which gets checked.
I want to save these date values as they are on every postback.
For example, the user selects 5 dates for 5 rows, and then sorts a particular column header.
My code will postback and will then build this entire HTML again - so basically I lose all the user entered data.
I cant store these values in session - since there can be as many as 500 rows.
I hope you'll understand my question better now.
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