Web Forms :: Databound Happens Earlier Than Buttonclick?
Dec 30, 2010
I have trouble with the sequence of events on my page. I have a button, which on its onClick event calls a method, which posts data to a database, and causes a postback. But on the same page I have a repeater which uses the data that is being modified by the button. I would need somehow the buttonclick event occur "earlier" than the databinding in the repeater to show the correct data.
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Dec 26, 2012
I wrote this code for inserting Items in shopping cart and I expect one day Shopping Cart Items be available.
if (Cache[username] == null)
{
ShoppingCart cart = new ShoppingCart();
[Code].....
and I face another problem that I think it's related to above problem. I have a cateogry of product when I click on a category I send categoryid via querystring to another page and fetch iformation about that from database and bind them in repeater this is first line of code
<asp:Repeater ID="rpt_lookpd" runat="server" EnableViewState="false">
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When I removed EnableViewState="false" It worked again.
[URL]
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May 10, 2010
i have a FormView, and i already have a Label control that gets the value of theselected propery inside the FormView, so each time the FormView displays data, i have a Label control that displays individual values, according to the value of the FormView, here is the code:
[code]....
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Mar 2, 2011
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Jul 20, 2010
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[Code]....
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Oct 19, 2010
I have a form for registering customers, with RequiredFieldValidations that each are bound to a specific textbox. My problem is that I would also like to bind them to one specific buttonclick, since I have other buttons which I don't want to trigger the validations. Is that possible?
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Mar 27, 2010
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Aug 7, 2010
I want to reset all the fields and values in codebehind on buttonclick.
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Feb 23, 2012
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Apr 27, 2010
This is my code for datagrid with Htmlinputfile control.Datagrid opens in modalpopup created in javascript.On button click i am trying to submit values of Htmlinputfile.But it becomes null.I dont know how.
<
asp:DataGrid
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[code]...
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Dec 7, 2010
I want to render something like this (with ASP.Net Controls in the codebehind):
<ul>
<li class="first"><h1>This is a caption</h1></li>
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<li><a href="#" title="" target="_self">Foo1</a></li>
<li><a href="#" title="" target="_self">Foo2</a></li>
<li><a href="#" title="" target="_self">Foo3</a></li>
<li><a href="#" title="" target="_self">Foo4</a></li>
</ul>
<ul>
<li class="first"><h1>This is a another caption</h1></li>
<li><a href="#" title="" target="_self">Foo5</a></li>
<li><a href="#" title="" target="_self">Foo6</a></li>
<li><a href="#" title="" target="_self">Foo7</a></li>
<li><a href="#" title="" target="_self">Foo8</a></li>
<li><a href="#" title="" target="_self">Foo9</a></li>
<li><a href="#" title="" target="_self">Foo10</a></li>
<li><a href="#" title="" target="_self">Foo11</a></li>
</ul>
The amount of li elements that will be rendered into each ul is determined at runtime. Each link in a li belongs to into a specific ul (the one containing a specific caption. Imagine this as a kind of a treeview with nodes and subnodes) During the bind Event I need access to an ASP:HyperLink that will be rendered into the a-element. Which databound ASP.Net control should I pick for this? Looks like a repeater in a repeater, which should make the databinding process ugly. I'm thinking about creating this HTML-Output with StringWriters myself.
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Jan 26, 2010
I have dropdown list I need to selet the value and and when I click button I need to hit the database to get the values from database..
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Jan 6, 2011
how to show the gmap in asp.net webform on buttonclick when i enter destinations in textbox1 and textbox2
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Dec 10, 2010
I have a page with
Page
--UpdatePanel
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What could be causing them not to update even when bind method is executed?
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Dec 10, 2010
I have a reportviewer1 with report1.rdlc. I want on buttonclick it changes to use report2.rdlc and display another report. I tried this and it is not working. What is wrong or missing with my code ?
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May 13, 2010
I am trying to add an instance of UserControl each time on button_click event, it works for the first time only. I am adding IDs to user control by appending integers from ViewState. Why does it not add work for subssequent clicks. Here is the simplified version with the same behavoir.
protected void Button1_Click(object sender, EventArgs e)
{
HtmlButton btnClick = new HtmlButton();
btnClick.ID = "bt" + Append.ToString();
btnClick.InnerText = "Button 1";
MainArea.Controls.Add(btnClick);
}
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Feb 8, 2011
How can I enter data from textbox to gridview on the buttonclick event
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Nov 17, 2010
I have a <hr/> on the page and I want to hide it on buttonclick ?
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Nov 12, 2010
I have a web page like the page in the link given below.
[URL]
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Jul 19, 2010
I have a content page that displays search criteria in a div. I would like to hide the criteria div when results are returned, but keep it visible if no results are found. I have code in the DataBound event for the gridview that displays the number of rows returned from the query which works fine. To show the search criteria, I have a RegisterStartupScript which calls the javascript function to show the div. Even though the RegisterStartupScript code is executed, the javascript never runs (I put an alert in the function that never fired). Is this a lifecycle timing issue? I just don't see how I can register the javascript earlier in the page lifecycle if it is. I would think this is a very common requirement.
Sub Master:
[Code]....
[Code]....
Sub Master.cs
[Code]....
[Code]....
Content Page:
[Code]....
Content.cs
[Code]....
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May 3, 2010
i have a RadioButtonList and the list is bounded by a datasource.
By default, its default selected item is empty, i would like to know how i could make the first thing it databounds into, should be the selected item.
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Mar 24, 2010
I have a problem about BulletList. I'm using jQuery drag&drop to fill a BulletList. Since controls does not render when datasource is null, user has no <ul> to fill. Is there any way to force BulletList to render an empty <ul> when datasource is empty ?
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Aug 3, 2010
I have this datalist of hyperlinks. How do I configure them to add the querstring c=(int here) to the current URL?
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Nov 11, 2010
I am fairly new to asp.net programming. I found this custom control that uses ajax to update the contents of the control and it is working perfectly. However, I need to access some of the asp.net labels and images in the databound event so I can set their values/properties appropriately, and am not sure how to go about adding additional code or accessing these in my custom control (I have been googling endlessly with no results). My code for the custom control is below.
Imports System
Imports System.Text
Imports System.IO
Imports System.Collections
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports Microsoft.VisualBasic
Namespace myControls
Public Class AjaxDivView
Inherits CompositeDataBoundControl
Implements ICallbackEventHandler
Private _itemTemplate As ITemplate
''' <summary>
''' The ItemTemplate is used to format each item from the data source.
''' </summary>
<TemplateContainer(GetType(DivViewItem))> _
<PersistenceMode(PersistenceMode.InnerProperty)> _
Public Property ItemTemplate() As ITemplate
Get
Return _itemTemplate
End Get
Set(ByVal value As ITemplate)
_itemTemplate = value
End Set
End Property
''' <summary>
''' Register Javascript
''' </summary>
Protected Overrides Sub OnPreRender(ByVal e As System.EventArgs)
'Register Refresh Function
Dim eRef As String = Page.ClientScript.GetCallbackEventReference(Me, Nothing, "AjaxDivView_Result", "'" & Me.ClientID & "'", "AjaxDivView_Error", False)
Dim refreshFunc As String = "function AjaxDivView_Refresh() {" & eRef & "}"
Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), Me.UniqueID, refreshFunc, True)
MyBase.OnPreRender(e)
End Sub
''' <summary>
''' Iterate through the data items and instantiate each data item in a template.
''' </summary>
Protected Overloads Overrides Function CreateChildControls(ByVal dataSource As System.Collections.IEnumerable, ByVal dataBinding As Boolean) As Integer
Dim counter As Integer = 0
For Each dataItem As Object In dataSource
Dim contentItem As New DivViewItem(dataItem, counter)
_itemTemplate.InstantiateIn(contentItem)
Controls.Add(contentItem)
counter = counter + 1
Next
DataBind(False)
Return counter
End Function
''' <summary>
''' Render this control's contents in a Ul tag
''' </summary>
Protected Overrides ReadOnly Property TagKey() As System.Web.UI.HtmlTextWriterTag
Get
Return HtmlTextWriterTag.Div
End Get
End Property
''' <summary>
''' Render my contents to a string and send the result back to the client
''' </summary>
Public Function GetCallbackResult() As String Implements System.Web.UI.ICallbackEventHandler.GetCallbackResult
Dim builder As New StringBuilder()
Dim sWriter As New StringWriter(builder)
Dim hWriter As New HtmlTextWriter(sWriter)
Me.RenderContents(hWriter)
Return builder.ToString()
End Function
''' <summary>
''' Whenever I get called through AJAX, rebind my data.
''' </summary>
Public Sub RaiseCallbackEvent(ByVal eventArgument As String) Implements System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent
Me.DataBind()
End Sub
Public Class DivViewItem
Inherits WebControl
Implements IDataItemContainer
Private _dataItem As Object
Private _index As Integer
Public ReadOnly Property DataItem() As Object Implements System.Web.UI.IDataItemContainer.DataItem
Get
Return _dataItem
End Get
End Property
Public ReadOnly Property DataItemIndex() As Integer Implements System.Web.UI.IDataItemContainer.DataItemIndex
Get
Return _index
End Get
End Property
Public ReadOnly Property DisplayIndex() As Integer Implements System.Web.UI.IDataItemContainer.DisplayIndex
Get
Return _index
End Get
End Property
Protected Overrides ReadOnly Property TagKey() As System.Web.UI.HtmlTextWriterTag
Get
Return HtmlTextWriterTag.Div
End Get
End Property
Public Sub New(ByVal dataItem As Object, ByVal index As Integer)
_dataItem = dataItem
_index = index
End Sub
End Class
End Class
End Namespace
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