VS 2008 - Load Controls Dynamically - Won't Fire
Mar 12, 2010
I have a problem that I can't solve when I load controls dynamically. I have 3 states on a page that I traverse through and I load as many buttons on the page as the page state number + 1. For example, on state 0, I load 1 button, state 2 - 2 buttons, etc. The problem is after I move to a new page state, the button click event(s) of the dynamic buttons will not be wired up and won't fire until the second click of each button.
CSharp Code:....................
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Dec 24, 2010
I have a dynamically loaded usercontrol
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ucEditPanel.ascx.cs"
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Jan 11, 2011
I have a repeater that during the page load I want to go through all checkboxes and check the ones should be checked. I am bound to a sqldatasource control. Here is the code. when I run the for each loop during page load it has nothing for controls.count. I also tried prerender in case the controls werent bound yet.
<asp:Repeater runat="server" ID="univList" DataSourceID="UnivDS">
<HeaderTemplate>
<a href='javascript:deselect();'>Deselect All</a>
<table>
</HeaderTemplate>
<ItemTemplate>
<tr id='univtr<%# DataBinder.Eval(Container.DataItem, "companyid")%>'>
<td><input type="checkbox" runat="server" ID='univChk' onclick="javascript:toggleRow(this);" text='<%#DataBinder.Eval(Container.DataItem, "companyid")%>' /></td>
<td><%# DataBinder.Eval(Container.DataItem, "companyname")%></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
Code:
For Each check As Control In univList.Controls
If TypeOf check IS HtmlInputCheckBox AndAlso ids.Contains(CTYPE(check, HtmlInputCheckBox).Value) Then
CTYPE(check, HtmlInputCheckBox).Checked = True
End If
Next
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Jul 19, 2010
i want to be able to load user controls and populate them with data from a sql database at runtime based on a status field in my database but im struggling to do this.
my default page.aspx holds the user controls (acts like a container). at the moment i had referenced all the user controls to load up when the page was loaded so:
[Code]....
[Code]....
i then created a procedure which reads from the database the "status field". so if the status field is "pending" then i want the uc:GRLOLApproval control to show up but im not sure where to put this code or how to do it. i want to be abel to load the control at runtime and run this code. in my default.aspx.cs code i have done the following in the page load:
[Code]....
i tried to reference te user control in my default.aspx page by doing: protected GRLOLApproval GRLOLApp; but it wouldnt recognise it because it not been reference in the source file.how do i reference it so that i can read the data from my database and write to the fields in uc:Collectionrequest. (I have exposed the properties in the uc:CollectionRequest that i want to access btw) have been working on this for days now and just cant seem to load the user control or access any properties.
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Jan 19, 2011
I have UserControl that has asp control(<asp:Button runat="server" ID="btn" />) and I want to render it.
I tried 1
[Code]....
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[Code]....
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Mar 10, 2010
I was looking through my transcender exam kit for 70-562 and they say load dynamically created controls in the loadviewstateEvent. This should be CreateChildControls() instead, no?
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Jan 12, 2010
I'm developing an ASP.NET application and I'm trying to do the following:
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Dec 29, 2010
i have button that fire some times on Firefox or IE or Chrome
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Nov 17, 2010
for obvious reasons using master page instead of iframes is good in my view but the current project which is on Framework 1.1 has some some limitations to do any modifications as client is already using some 3rd party controls. Now, the issue i am facing is with page load event which is firing twice. see the below html code.
[Code]....
from the above code when eFolderTree.aspx is called with iframe "TreeAppFrame", the "page load" event in eFolderTree.aspx.vb is firing twice. I debugged for the issue and found that this is happening because of iframe "primaryAppFrame" which is calling "SiteFolder/ShowSiteFolderTable.aspx?Site=<%=sSiteId%>". when commenting the page reference "ShowSiteFolderTable.aspx?Site=<%=sSiteId%>" in iframe "PrimaryAppFrame", this is working correctly. What else do i need to do, to make sure that page load event fires only once in page "eFolderTree.aspx.vb"
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Nov 17, 2010
for obvious reasons using master page instead of iframes is good in my view but the current project which is on Framework 1.1 has some some limitations to do any modifications as client is already using some 3rd party controls.Now, the issue i am facing is with page load event which is firing twice. Please see the below html code.
[Code]....
from the above code when eFolderTree.aspx is called with iframe "TreeAppFrame", the "page load" event in eFolderTree.aspx.vb is firing twice. I debugged for the issue and found that this is happening because of iframe "primaryAppFrame" which is calling "SiteFolder/ShowSiteFolderTable.aspx?Site=<%=sSiteId%>". when commenting the page reference "ShowSiteFolderTable.aspx?Site=<%=sSiteId%>" in frame "PrimaryAppFrame", this is working correctly.What else do i need to do, to make sure that page load event fires only once in page "eFolderTree.aspx.vb" ?
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Oct 7, 2010
Do you think it is wise to load the background-body image dynamically in a CMS application from SQL Server 2005? Granted I would have to generate a sql statement based on size of the page to show the correct image. Anyone run into any pitfalls?
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Feb 9, 2011
I've been struggling with this for several hours now so I thought I'd give this forum a try. The problem is that I'm adding two kind of buttons (editBtn and delBtn) which show up fine but they won't fire their respective method when clicked. I also have a third button which works just fine.
[Code]....
[Code]....
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Jan 31, 2010
Can not fire Grid View RowEditing event in page load?
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In page load
If Page.Request.Params("__EVENTTARGET") = "ctl00_popupField" Then
AddHandler grdDOLineItem.RowEditing, AddressOf grdDOLineItem_RowEditing
End If
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'bind the grid view row
End Sub
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Mar 17, 2010
Im working with asp.net web application,I need to get multiple gridviews dynamically based on the count (which i get from database) for that i took a web user control and i added a gridview there . iwant to load that usercontrol in aspx.cs based on the count..
but im able to bind only one grid view...
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May 23, 2010
I am writing a search results page for an airline booking system. I have Next/Previous buttons to view flights for the next or previous days. The way i have done my results grid is that i use an HtmlTable and dynamically add rows, cells and controls into the cells. This gives ultimate flexibility given that we can add any control type we want and have it function as it does everywhere else in the system. As you should be aware - i must recreate these controls each time the page is reloaded (in the page_init event) since asp does not handle this automatically.
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- which is great. But the problem is, if the flight they selected on the return leg is no longer available it will not create the control and i get the following error;
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Jul 8, 2010
I'm creating some linkbuttons dynamically and assigning properties like below. Also I'm adding an event handler to the created link button:
[Code]....
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Mar 5, 2010
Can any one let me know "How to load the dynamcially added HTML Controls(Controls added using javascript) during the postbacks without loosing their values?
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Jun 21, 2010
I am trying to dynamically load query form as a user control and build a sql statement based on user selection. I have a dropdownbox for Tablename, FieldName, ConditionalOperators and Value Field. Once the user makes a choice and causes a postback I loose my QueryForm (UserControl) and the selection Changed event never gets fired. I tried reloading the QueryForm on Page Init, still no luck.
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Jun 2, 2010
I've got a repeater that's used to display the output of a dynamic report that takes criteria from webcontrols on the page. Within the repeater's ItemDataBound method I'm adding controls (Linkbuttons for sorting by column values) dynamically to the header of the repeater based on values selected in a checkbox list and at this point setting the CommandArgument and CommandName properties of the linkbuttons.
The issue is that when the linkbuttons are clicked they don't fire the ItemCommand event although they are clearly being correctly created and added to the header (there is some additional code to set the cssClass, text etc. and this works as expected.) The first column header in the repeater is set in the markup and the itemcommand event fires correctly on this one only. When the other column headers are clicked the repeater rebinds as programmed, but the columns are not dynamically re-generated.
Nightmare.ascx
<asp:repeater runat="server" id="rptReport" OnItemDataBound="rptResults_ItemDataBound" OnItemCommand="rptResults_ItemCommand" EnableViewState="true">
<headertemplate>
<table>
<tr runat="Server" id="TRDynamicHeader">
<th>
<!-- This one works -->
<asp:Linkbutton runat="server" CommandName="sort" commandArgument='<%# Eval("Name")%?' />
</th>
<!-- additional header cells get added dynamically here -->
</tr>
</headertemplate>
<itemTemplate>
<td><%# Eval("Name")</td>
...
</itemTemplate>
</asp:repeater>
Nightmare.ascx.cs
protected void PageLoad(object sender, eventArgs e){
if (! isPostback){
setupGui();//just binds dropdowns etc. to datasources
}
}
protected void btnRunReport_Click(...){
List<ReportLines> lstRep = GetReportLines();
rptReport.DataSource = lstRep;
repReport.DataBind();
}
protected void rptReport_ItemDataBound (...){
if (e.Item.ItemType == ListItemType.Header)
{
foreach (ListItem li in chbxListBusFuncs.Items)
{
if (li.Selected)
{
th = new HtmlTableCell();
lb = new LinkButton();
lb.CssClass = "SortColHeader";
lb.CommandArgument = li.Text.Replace(" ", "");
lb.CommandName = "sort";
lb.Text = li.Text;
th.Controls.Add(lb);
((HtmlTableRow)e.Item.FindControl("TRDynamicHeader")).Cells.Add(th);
}
}
}
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
//Row level customisations, totals calculations etc.
}
}
<!-- this only gets called when the 'hardcoded' linkbutton in the markup is clicked.
protected void rptReport_ItemCommand(object sender, Eventargs e){
lblDebug.Text = string.Format("Well? What's Happening? -> {0}:{1}", e.CommandName, e.CommandArgument.ToString());
}
(The only thing that can call the runreport routine is a single button on the page, not shown in the code snippet above.)</textarea></p>
<input type='hidden' name='ID[3]' value='82079' />
<input type='hidden' name='URL[3]' value='http://forums.asp.net/t/1472917.aspx' />
<input type='hidden' name='CAT[3]' value='Forms Data Controls' />
<input type='hidden' name='BOARD[3]' value='microsoft' />
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<input type='hidden' name='RANDOM[3]' value='uck4OZUSh' />
<input type='hidden' name='REPLIES[3]' value='6' />
<input type='hidden' name='USER[3]' value='aziz' />
<p><input class=subject type='text' size='90' name='SUBJECT[3]' value='Forms Data Controls :: ValidationGroup causes button not to fire ItemCommand event' /><select name='INDEXED[3]'><option value='1' selected>UPDATE</option><option value='2'>DELETE</option></select>Sep 21, 2009 02:16 AM - Replies: 6 CAT: Forms Data Controls<a target=_blank href="http://forums.asp.net/t/1472917.aspx">View</a></p>
<p> <textarea rows=10 cols=100 name='POST[3]' onfocus='setSelRange(this, 0, 0)'/>
I have a page with a couple of RequiredFieldValidators, each in its own ValidationGroup. One of the RequiredFieldValidator controls is inside a Datalist and the submit button triggers the relevant DataList_ItemCommand. It works just dandy until I add the ValidationGroup to the button, at which point clicking on the button no longer fires the DataList_ItemCommand event. Here is the HTML
[Code]....
Note that the ValidationGroup name is there, and it is unique. No other ValidationGroups exist with that name. As it stands, this code does NOT fire the DataList_ItemCommand event, so no update occurs. However if I remove the ValidationGroup declaration from the Button control, the event fires properly.
Richard</textarea></p>
<input type='hidden' name='ID[4]' value='140242' />
<input type='hidden' name='URL[4]' value='http://forums.asp.net/t/1621410.aspx' />
<input type='hidden' name='CAT[4]' value='Forms Data Controls' />
<input type='hidden' name='BOARD[4]' value='microsoft' />
<input type='hidden' name='P_DATE[4]' value='Nov 09, 2010 10:04 AM' />
<input type='hidden' name='RANDOM[4]' value='5a4W7DeJ4' />
<input type='hidden' name='REPLIES[4]' value='4' />
<input type='hidden' name='USER[4]' value='aziz' />
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<p> <textarea rows=10 cols=100 name='POST[4]' onfocus='setSelRange(this, 0, 0)'/>
i have a repeater with a button in the footer template which i want to be able to update any of the items that are added (update quantites/totals/delete the item). however the 'UpdateOrderDetails' event never fires when the button is clicked. here is the code within the repeater...
<ItemTemplate>
<tr>
<td>
<asp:CheckBox ID="chkDelete" runat="server" />
<asp:HiddenField ID="hidProduct_Key" runat="server" />
</td>
<td><asp:Literal ID="ltlProduct_Name" runat="server" /></td>
<td><asp:Literal ID="ltlProductOption_Size" runat="server" /></td>
<td><asp:Literal ID="ltlProductOption_Code" runat="server" /></td>
<td><asp:TextBox ID="txtQuantity" runat="server" /></td>
<td><asp:Literal ID="ltlItemPrice" runat="server" /></td>
<td><asp:Literal ID="ltlLineTotal" runat="server" /></td>
</tr>
</ItemTemplate>
<FooterTemplate>
<asp:Panel ID="pnlFooter" runat="server" Visible="False">
<tr id="trTotalExVAT" runat="server">
<td colspan="6">Total (ex VAT)</td>
<td><asp:Literal ID="ltlTotalExVAT" runat="server" /></td>
</tr>
<tr id="trVAT" runat="server">
<td colspan="6">VAT</td>
<td><asp:Literal ID="ltlVAT" runat="server" /></td>
</tr>
<tr>
<td colspan="5">
<asp:Button ID="btnUpdate" OnClick="UpdateOrderDetails" Text="Update" runat="server" />
</td>
<td>Delivery</td>
<td><asp:Literal ID="ltlDelivery" runat="server" /></td>
</tr>
<tr>
<td colspan="6">Total</td>
<td><asp:Literal ID="ltlTotal" runat="server" /></td>
</tr>
</asp:Panel>
</table>
</FooterTemplate>
the 'updateorderdetails' event in code behind is here
Public Sub UpdateOrderDetails(ByVal s As Object, ByVal e As RepeaterCommandEventArgs)
For Each objRepeaterItem As RepeaterItem In rptOrderDetails.Items
Select Case objRepeaterItem.ItemType
Case ListItemType.AlternatingItem, ListItemType.Item
Dim chkDelete As CheckBox = objRepeaterItem.FindControl("chkDelete")
Dim hidProduct_Key As HiddenField = objRepeaterItem.FindControl("hidProduct_Key")
Dim txtQuantity As TextBox = objRepeaterItem.FindControl("txtQuantity")
' check for deletion or update
If chkDelete.Checked Then
Me.Basket.RemoveProduct(hidProduct_Key.Value)
Else
' check for update
If IsNumeric(txtQuantity.Text) AndAlso CInt(txtQuantity.Text) >= 0 Then
Me.Basket.Products(hidProduct_Key.Value).Quantity = txtQuantity.Text
End If
End If
End Select
Next
' update order details
BindOrderDetails()
End Sub
but this procedure is never called when the button is clicked, so wondered what i need to do to get this working
</textarea></p>
<input type='hidden' name='ID[5]' value='49574' />
<input type='hidden' name='URL[5]' value='http://forums.asp.net/t/1522852.aspx' />
<input type='hidden' name='CAT[5]' value='Web Forms' />
<input type='hidden' name='BOARD[5]' value='microsoft' />
<input type='hidden' name='P_DATE[5]' value='Feb 07, 2010 06:01 AM' />
<input type='hidden' name='RANDOM[5]' value='OoKSV9VFH' />
<input type='hidden' name='REPLIES[5]' value='3' />
<input type='hidden' name='USER[5]' value='aziz' />
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<p> <textarea rows=10 cols=100 name='POST[5]' onfocus='setSelRange(this, 0, 0)'/>
I have imagebutton inside datalist.....the problem is that onclick event of serverside not get executed for only IE ..but its work fine for mozzila....i m not getting what wrong in this code.
aspx code
<asp:DataList
ID="dlProduct"
runat="server"
CellPadding="5"
CellSpacing="5"
Width="300px"
OnItemCommand="dlProduct_ItemCommand"
>
<ItemTemplate>
<p>
<asp:Label
ID="lblName"
Visible="false"
runat="server"
Text='<%# Bind("ModelName") %>'
CssClass="style1"
>
</asp:Label>
</p>
<p>
<strong><span
class="style1">
MRP : Rs.
<asp:Label
ID="mrp"
runat="server"
Text='<%# Bind("mrp") %>'
CssClass="styles"
>
</asp:Label>
</span>
<br
/>
</strong>
</p>
<p>
<strong>
<span
class="style1">Price : Rs.</span>
<asp:Label
ID="PriceLabel"
runat="server"
Text='<%# Bind("price") %>'
CssClass="style1">
</asp:Label> <br
/> </strong>
</p>
<asp:Label
runat="server"
ID="lblQuantity"
Text=""
Font-Bold="true"
CssClass="style1"></asp:Label>
<asp:Textbox
ID="tbQuantity"
runat="server"
Width="22px"
Text="1"
CssClass="nutext"
Visible="false"
></asp:Textbox>
<img
src="images/buynow_btn.jpg"
width="144"
height="58"
runat="server"
/>
<asp:ImageButton
runat="server"
ID="btnAddToCart"
src="images/addtocart.jpg"
width="144"
height="81"
CommandName="AddToCart"
/>
<asp:Button
runat="server"
ID="Button1"
Text="Add to Cart"
CausesValidation="false"
CommandName="AddToCart"
/>
</ItemTemplate>
</asp:DataList>
CS code
protected void dlProduct_ItemCommand(object source,
DataListCommandEventArgs e)
{
Response.Write("hello");
Response.End();
}
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Feb 21, 2011
When the user selects an "account" we dynamically create a linkbutton with the selected dates. However, the linkbutton onclick handler doesn't fire when the button is clicked.
Dim linkBtn As New LinkButton
linkBtn.Text = "blah"
AddHandler linkBtn.Click, AddressOf linkButtonHandler
linkBtn.ID = panelDatesRencontre.Controls.OfType(Of LinkButton).Count
panelDatesRencontre.Controls.Add(linkBtn)
ScriptManager1.RegisterAsyncPostBackControl(linkBtn)
Dim Trigger1 As New AsyncPostBackTrigger
Trigger1.ControlID = linkBtn.ID
Trigger1.EventName = "Click"
UpdatePanel2.Triggers.Add(Trigger1)
Answer: i make that in page_load, it seems to work
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Jul 20, 2010
I have a page with textboxes and a button. I would like to dynamically load the textboxes with data that is in a detailsview on a page load or detailsview load. For example, ID, first name, last name. I find out how to do this on another page with a selected_indexchanged event with a gridview. See the code below. I'd like to be able to do the same thing but with a detailsview in the detailsview_load event.
Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.SelectedIndexChanged txtPK.Text = GridView1.Rows(GridView1.SelectedIndex).Cells(1).Text
txtFirstName.Text = GridView1.Rows(GridView1.SelectedIndex).Cells(2).Text txtLastName.Text = GridView1.Rows(GridView1.SelectedIndex).Cells(3).Text
End Sub
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Feb 2, 2010
I'm trying to write some code to use reflection to load new assemblies. I observed the file system with FileSystemWatcher, so that if anything in the folder changed, I can get notified and then reload them.
Firstly I have an assembly filters.dll loaded. Let's say its version is 1.0.0. Then when I have a new one v1.0.1, I paste it into the folder and replace the older one. Of course this fires "Change" event of FileSystemWatcher, and finally lead to assembly reloading.
Everything works fine, but I just want to know, what would happen to the firstly loaded assembly? Get replaced by the newer one? Or still somewhere in the memory?
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May 14, 2010
I am implementing the Tabs dynamically from serverside, loading usercontrols inside them (using AjaxToolkit).
Question is, If I click on one of the hyperlink inside one of the tabs, it should open a new tab dynamically to show the results. How can I achieve that?
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Feb 3, 2010
I want the javascript function to be executed on the from load. SUppose I want the JS to be executed on the button click,say for example simple Pop Up. For dat we use the code
Code:
protected void Page_Load(object sender, EventArgs e)
{
Button1.Attributes.Add("onclick", "javascript : alert1();");
}
Code:
<script language ="javascript" type ="text/javascript" >
function alert1()
{
alert('Popup');
}
</script>
Can somebody tell me how to execute the JS on the form load?
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Nov 24, 2010
I'm a bit new to .net so i was wondering if a thing like this is possible. I'm having one basic aspx script that needs to load some "plugins". Every plugin has its own settings and it should perform different logics. What i'd do in php is create a class for each plugin, load that class, pass the settings file to it and call some method on that class that would give me some output. But is it even possible in vb.net? I'd need to have multiple files with multiple classes, load those files, depending on the plugin name and call some method on them to parse that plugin's settings.
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