Updating Placeholder During Runtime?

Mar 11, 2010

I have a repeater and within that repeater, I have an item template. Now this template is formatted with a couple of tables, but for this question I have removed them to make things easier to read:

[code]....

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Web Forms :: Updating Master Page PlaceHolder With UpdatePanels?

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I have an ASPX page with two columns. The left column has a GridView control that contains a list of article titles as LinkButton controls. When a LinkButton control is clicked, the content of the article is displayed in the right column. Each of the columns
is wrapped in an UpdatePanel. So far everything is working .

Each article title has further descriptive text that is defined in the code-behind as labels within a Div object. Each Div is added to a PlaceHolder object on the master page. References to the Div objects are added as attributes to the LinkButton so that JavaScript is executed when the user rolls over the title and the Div object with the descriptive text is displayed.

The rollovers are working fine and displaying the correct text for the first GridView page. However, when I click a button in the GridView's paging row to advance to the next page of the GridView list, the rollovers are not updated. The text is what was defined for the first GridView page of titles. How should I get the PlaceHolder objects to update when the UpdatePanels are updated?

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[Code] ....

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I 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.

[Code]....

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Web Forms :: How To Copy A Placeholder To Another Placeholder

Aug 4, 2010

[Code]....

I want to copy a placeholder to another placeholder, i know, i can't write somethin like this,

plh_footer = plh_header;

how can i do that?

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I am using ASP.NET MVC 2 in Visual Studio 2010. I have a ASP.NET MVC application with a master page that contains 3 content placeholders. When I create a new view from a controller by right-clicking the action method and selection "Add View", I end up with a ASPX page that does contain the 3 content placeholders but in the wrong order. This is by design because in the T4 template used to create views "TitleContent" will be used first followed by the "MainContent" and after that all the other content placeholders are put.

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Text Wrapping Around In Placeholder?

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My application generates report which lists blocks of information within placeholders. When the text is very long it is wrapping around with no indentation.

It appears like this:

[code]....

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I have a #placeholder in a page .I want to redirect to this page form a link that should take me to #placeholder section.in firefox this works fine,but in ie i am not getting #placeholder

my redirect logic

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Placeholder Inside An UpdatePanel?

Nov 10, 2010

A 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">

[code]...

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Implement LayoutTemplate With A PlaceHolder?

Jan 6, 2011

In my own server control, I would like to implement something similar to the ListView:

<asp:ListView runat="server">
<LayoutTemplate>
<asp:PlaceHolder runat="server" id="itemPlaceholder" />
</LayoutTemplate>
</asp:ListView>

I have created an ITemplate property, I can set the layout in the aspx page, and I am doing ITemplate.InstantiateIn(myControl).

But I can't figure out how to insert controls at the placeholder. I'm guessing it would be something like MyTemplate.FindControl("itemPlaceholder").Controls.Add(myControl). I tried casting to the type of my ITemplate, but I get the error:

Unable to cast object of type 'System.Web.UI.CompiledTemplateBuilder' to type 'MyNamespace.MyLayoutTemplate'

Edit: I just found this: http://www.nikhilk.net/SingleInstanceTemplates.aspx Control developers can define templates to be single instance using metadata which causes the ID'd controls within the template contents to be promoted to the page level... The parser and code-generator together work behind the scenes to add member fields, and initialize them at the right time.. It seems to be only for user controls? I tried Page.FindControl() after doing this but it didn't find anything.

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Use Asp:placeholder Inside A Repeater?

Oct 20, 2010

I have a HTML table that is built with a repeater. Sometimes the table has 5 rows, sometimes it has 8 rows.

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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Web Forms :: Finding Radiobutton In Placeholder

Apr 1, 2010

I have a web form and i'm creating tables including radiobuttons dynamically according to a number entered from a textbox,this tables created in placeholders.I'm using update panels so when i click the radiobuttons the radiobutton dissappear and a textbox is created at the same place,if one cell is created there's no problem but at multi creation there's a problem,when i click one radiobutton,all of them disappear and textboxes created,btw there's a checkedchanged event created dynamically also.I try many ways but i can't find the selected radiobutton,what do i have to do?

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C# - Add Custom Control To A Placeholder All Controls

Jul 31, 2010

I've created a usercontrol in asp.net webforms (c#) called 'Article' which contains a general layout for an article and has a public property called datasource. the datasource will be populated by a subsonic (DAL) activerecord. In the controls pre-render event it will read the record and populates the labels. I think this is a flexible solution with easy maintenance. My problem however is that when I try to add the control to a placeholder all my controls like labels, literals and the like receive a null reference exception. I'm trying to spawn the controls as followed:

foreach (DAL.Article item in coll)
{
p7.Controls.General.Article.Article article = new p7.Controls.General.Article.Article();
article.datasource = item;
phContent.Controls.Add(article);
}

Is there something I've completely missed? It's driving me crazy heheh! Another question is do you guys know if this method will have a big impact on performance. I'm only adding 10 of those article controls per page.

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Accessing HtmlTable Inside A PlaceHolder?

Nov 28, 2010

I'm working with a website written in aspx.net over vb.

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.

Then, when the user wants to send mail, he presses a button and than I need to access the checkboxes, and I'm having problems with this, the Sub doesn't know the checkBox object.

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Web Forms :: How To Find Control Within A PlaceHolder

Jun 8, 2010

[Code]....

In my code, I wanted to do a search on the form controls, such as check box and radio button. These controls are created during run time.

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Validate All Text Boxes In PlaceHolder

Nov 11, 2010

I've problem with validating all text boxes in PlaceHolder. I made PlaceHolder and I've no idea how to check that all textboxes have integer numbers as a text.

public void Made_Matrix (PlaceHolder Matrix, int Size){
for(int row=0; row < size; row++){
for(int col=0; col < size; col++){
TextBox TB = New TextBox();
Matrix.Controls.Add(TB);
TB.ID = TB + Convert.ToString(row) + Convert.ToString(col);
TB.AutoPostBack = "true";
}
Matrix.Controls.Add(new LiteralControl ("<br/>"));
}
}
public void TB_Validate (PlaceHolder Matrix, int Size){
for (int row = 0; row < size; row++){
for (int col = 0; col < size; col++){
string Ident = TB + Convert.ToString(row) + Convert.ToString(col);

how can i find text hidden in TextBox with ID from Ident? And how to check if it's numeric? I suppose that in .NET there's no function like IsNumeric(), am I right?

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Adding Html To A Placeholder Control On The Fly?

Jan 15, 2010

I am a generic markup which I load at runtime froma file as follows:

<div id="pagewidth" >
<div id="header" > Head </div>
<div id="wrapper" class="clearfix" >
<div id="twocols" class="clearfix">
<div id="column2" > Main Content Column </div>
<div id="column3" > right Column </div>
</div>
<div id="column1" > Left Column </div>
Footer

I want to add this to a place holder control in asp.net web page. How do I do it?

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AJAX :: PlaceHolder Inside UpdatePanel?

Nov 8, 2010

TThis 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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