C# - Creating Web Controls Inside A Content Placeholder Programmatically?
Mar 31, 2011I've got a master page and a content page. How can I add controls to the master page's content placeholders programattically?
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It works fine when
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My control is added inside an Update Panel
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However, if My control is inside a Content Placeholder which is inside an Update Panel, it fails to work as it should. In this scenario, when the Columns collection is edited in the designer, if you then switch back to Source view, the Columns collection is emptied. I have to save the aspx page before switching back to Source view for the changes to be kept.
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"UserControl.ascx"
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VS 2010 - How To See A Control In Another Content Placeholder
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Sep 8, 2010in my master page content place holder.
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protected void Page_PreInit(object sender, EventArgs e)
{
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ContentPlaceHolder1. ????
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Jan 29, 2010I have the following code behind that was, until recently, working fine and dandy!
tbxProdAC.Attributes.Add("onclick", "$('#" + GridView1.ClientID + "').remove();
$('#" + radProdAC.ClientID + "').attr('checked', true);
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Mar 11, 2011(vs2010 sl4 vb.net)
When I create a default silverlight application in VS2010, I get a silverlight user control and a web site that hosts it. The object tag in the apsx page that hosts the silverlight object has its width and height set to 100%. The silverlight user control takes up all the broswer window and it also grows and shrinks properly as the browser is resized. Perfect.
If I add a master page and child page, in the child page I copy the object tag, still set at 100% height, the rendered page does not expand to fill the browser window/ I can set the object tag height to, say, 600, and it now is static at 600, but I want it to be dynamic just like when it was not hosted on a master page.
I do not believe this to be a silverlight issue, but rather a content placeholder sizing issue. I have tried a lot of diffferent ways to set the height, but nothing I do allows me to make the child page hosted object size itself based on the browser window,
Is it possile to get this to work or is this a consequence of using master pages? I can post sample code demonstrating this if needed.
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I'm new at AJAX (that's my first problem - lol)
I set the timer up to call a function, but not sure how to go about refreshing the placeholder with a different ascx file. I'm sure i'll be using UpdatePanel to do this, but haven't been able to figure this out. Easy to replace a value in a label using AsyncPostBack trigger, but nothing on how to achieve this.
Placeholder Inside An UpdatePanel?
Nov 10, 2010A little pseudo code to provide some background:I have an ASPX with a placeholder and a buttonWhen the button is clicked it adds a web user control (uc1) to my placeholderhe uc has a buttonWhen clicked it adds a different user controls (uc2) to the placeholderStepping through the code, if I look at the placeholder.controls.count before and after the button-click in #4 the count increases by one, as you would expect.The problem is that the uc2 added in #4 doesn't appear on the screen. So, I wrapped my placeholder in an UpdatePanel. I've never used one before. So, I could refresh the placeholder after the uc2 was added.relevant ASPX code
<ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server></ajaxToolkit:ToolkitScriptManager>
<ajaxToolkit:TabContainer ID="tcNavigation" runat="server" ActiveTabIndex="0">
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It was easy to add the header rows.
<asp:PlaceHolder runat="server" ID="additionalHeaderColumns" />
In code behind I added controls (htmlheadercells) to the contentholder:
Dim tableHeaderCell As New TableHeaderCell()
tableHeaderCell.Text = "Test"
additionalHeaderColumns.Controls.Add(tableHeaderCell)
When I try to do the same in the databound event for each row I get an errormessage that tells that its not possible to put asp:PlaceHolder inside the row. it expects tablecells.
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There is a HTML template in my project with some LI elements to create a multiple checkboxes on my page. Template looks like this:
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These LI elements must be generated with standard asp:CheckBox in it for every value, retreaved via webservice request.
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I have a placeHolder, and I create a table of names inside this PlaceHolder, each name has an HtmlInputCheckBox next to it.
Im doing this in the aspx.vb file, when the page is uploading.
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AJAX :: PlaceHolder Inside UpdatePanel?
Nov 8, 2010TThis time I'm facing some unusual behavior with a web page that I'm developing. I have a table with several controls and gridviews and stuff. At some point of the table, i have to show some rows (they were hidden) when the users clicks a button. I was doing this with a PlaceHolder, but now i have to do it without the postback being displayed. I thought: "That should be easy, all i have to do is to put the PlaceHolder inside an UpdatePanel, and that's it" but no, no no nooo!! NOTHING IS THAT EASY!!! It actually works but it puts the hidden rows at the top of the page, not where they suppose to go!!My code is the following:
<asp:UpdatePanel runat="server" ID="uplAutoridadesAmbientales">
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Mar 22, 2011I am using list view to display the the data but i am getting an error like An item placeholder must be specified on ListView 'ListView1'. Specify an item placeholder by setting a control's ID property to "itemPlaceholder". The item placeholder control must also specify runat="server.Even i have specified the itemplaceholder id but no use still same error.
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May 21, 2010I am stuck in chart controls...Here is my prob... There is a ListBox containing some items...when user selects multiple items from the list box I want to generate a dynamic table with the number of columns same as that of the number items selected in the listbox. And for each selected item I want to show a seperate chart in the columns...Currently I want the same chart control for every selected item (i.e. a static hard coded chart that i will replace later by dynamic values)....I am using a method that draws a chart control using a sample dataset... I am calling it each time when a new column is created..Also the DrawChart method executes for the first column only and throws an index out of range exception! after the first execution...my code is not working...here
my code...
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