Maintain ViewState Of PlaceHolder / When Page Get Refresh All Controls From Placeholder Gets Removed From It?

Jan 19, 2010

how to maintain state of placeholder. i have a placeholder in which i add many image controls dynamically but when my page get refresh all controls from placeholder gets removed from it. the enableViewstate of placeholder is set to true.

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Forms Data Controls :: List View Item Placeholder / Error An Item Placeholder Must Be Specified On ListView 'ListView1'

Mar 22, 2011

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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Web Forms :: Add Control On Page At Runtime And Maintain Viewstate On Browser Refresh

Mar 4, 2011

how can i add dynamic control (like textbox) on asp.net page at runtime and maintain the values of the control (viewstate of control ) on client browser refresh or roundtrip?

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ViewState - Empty Placeholder Generates View State?

Jan 1, 2011

On my web-page I have PlaceHolder, not controls are loaded into it.

<asp:PlaceHolder ID="PlaceHolderStatMain" runat="server">
</asp:PlaceHolder>

I am looking the ViewState generated for the page, it is the following:

<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJLTg1NDkyNTUzD2QWAgIDD2QWAgIND2QWAmYPZBYCAgEPZBYCZg9kFgJmD2QWBmYPFQEYL3N0YXRfc3RhZGl1bS9sZWFndWVfV0VGZAIBDxUBGC9zdGF0X3N0YWRpdW0vbGVhZ3VlX0VFRmQCAg8VARgvc3RhdF9zdGFkaXVtL2xlYWd1ZV9GQ1VkZEuSBUr5LFL6WfCehNBJgjrq0GzwWCWN2qlU70V7LAAb" />

When I set EnableViewState to false:

<asp:PlaceHolder ID="PlaceHolderStatMain" runat="server" EnableViewState="false">
</asp:PlaceHolder>

The viewstate content was decreased significantly:

<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJLTg1NDkyNTUzZGTTn8Y28VwmpE/K7yPPkLFvhrqMdU8THijFW/BMFzk0tQ==" />

Question: how to remove 'useless' viewstate content without disabling viewstate for placeholder himself (I would like other control loaded into placeholder to has viewstate)?

Is it possible at all?

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MVC :: How To Put A Placeholder Before The "MainContent" Placeholder In The Generated View

Jun 3, 2010

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.

I have a subtitle content placeholder in my master page that I want to put before the "MainContent" placeholder. Is there a way to achieve this with modifying the Create.tt T4 template?

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C# - Redirecting To A Page With #placeholder?

Jan 7, 2011

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

- string path =
HttpContext.Current.Request.RawUrl +
#placeholder;
Response.Redirect("{0}?ReturnUrl={1}",
Server.Encode(path), Server.Encode(path))));

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Web Forms :: Master Page Content Going Out Of Placeholder?

Sep 8, 2010

in my master page content place holder.

i have a grid which is going out of placeholder (as its bit bigger ), when page is loaded. i would prefer it to stay inside the placeholder or expand the placeholder.

Currently its going out side and when it moved out of placeholder it becomes transparent to the materpage default template.

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C# - Display Hidden Placeholder Without Refreshing The Page?

Feb 10, 2010

I have two placeholders in one page and basically my requirement is that I want to show other placeholder on click of button which is in first placeholder without refreshing the page.

But when I m clicking on the button in 1st placeholder it is refreshing the page and then showing me second placeholder.I m open to hear any other suggestions also if it is not possible through placeholder.

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Web Forms :: Updating Master Page PlaceHolder With UpdatePanels?

Aug 30, 2010

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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C# - Want To Find Master Page's Content Placeholder And Add Text To It?

Dec 21, 2010

I tried this much:-

protected void Page_PreInit(object sender, EventArgs e)
{
class1 obj = new class1();
DataTable dt = new DataTable();
dt = obj.get_text();
ContentPlaceHolder ContentPlaceHolder1 = ContentPlaceHolder)this.Master.FindControl("ContentPlaceHolder1");
ContentPlaceHolder1. ????
}

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How To Move .NET PlaceHolder Control From Page Controls Collection To Custom Control's Output

Feb 26, 2010

I am writing an ASP.NET custom control.In my custom control code, I find a PlaceHolder control in the page like so:this.myPlaceholder = Page.FindControl("placeholder1") as PlaceHolder Then, I render the placeholder as the output of the custom control:

protected override void Render(HtmlTextWriter output)
if (this.myPlaceholder != null)
this.myPlaceholder.RenderControl(output);

However, this causes the placeholder to be rendered in two places - in the custom control output (good) and in the original location in the page (bad).

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Web Forms :: Page Load In Master Page For Placeholder?

Dec 29, 2010

<p> I want to specify a page to load an external link so it only appears on that one page. I've updated the site.master file with this code

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AJAX :: How To Work Update Progress In The Page Inside Content Placeholder

Jun 11, 2010

Is there possible to work update progress in the page inside content placeholder.

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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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Web Forms :: Delete Controls By ID In Placeholder?

Jun 14, 2010

I have an .aspx form that has a place holder that allows a user to add controls on button click. Upon button click of "Remove last added control" the user will see the last control be removed. I have searched this and can capture the control that they are wanting to delete but am having trouble actually removing the darn thing!!

Here is my code that I have that iterates through the controls and finds the specific ID that i want to delete but does not seem to delete it due to my syntax I believe (Coded in C# in .Net envirnomnet).

foreach (Control c in myPlaceHolder.Controls)
{
if (c.ID == "myTextBox" + Convert.ToString(Session["Control_Count"]))
{
this.Controls.Remove((c));
}
}

The session["Control_Count"] is the highest or greatest value that is added to the page. (example of 2 control ID's: myTextBox1, myTextBox2.) I want to be able to Delete TextBox2 and leave TextBox1 and thought thi swas a way of doing so.

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Web Forms :: Nested Master Pages - Want To Know The Aspx Page Canáplace Contents Insideáthe Placeholder B

Feb 15, 2010

My application has a Parent master page, a child master page and an aspx page( inheriting the child master page)

> Parent master page has two content placeholders ( A and B)

>Child master page uses the content placeholder A and instills two more placeholders ( C and D)

>aspx page can now use C and D naturally

However i would like to know whether the aspx page can place contents inside the placeholder B( which was not used by child master page)

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Web Forms :: Finding Dynamic Controls I Add In A PlaceHolder

Jun 27, 2010

My code was actually working before. I think since I switched to .NET 4, it may have stopped functioning.What I do is this: I add some TextBox controls inside a PlaceHolder control. Then when user clicks the submit button, I am reading values entered into these texboxes.

This is what's on the page:

[Code]....
This is how I add controls into my PlaceHolder:

[Code]....

And this is the button click event: [Code]....

Like I said, this code was working before but now it doesn't.

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Data Controls :: Radio Button In Placeholder

Jul 24, 2012

In place holder i have radio button, and  label box --->getting values form dataset,

if i click the radio button in placeholder i want to get the value of label box

Radio button index changing--->i got the radio button value but how to get the lable value while radio button index changed

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Usercontrols - Loading User Controls Programatically Into A Placeholder?

Apr 15, 2010

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" AspCompat="True" %>
<%@ Register src="Modules/Content.ascx" tagname="Content" tagprefix="uc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[code]...

But still no results unfortunately.

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C# - Creating Web Controls Inside A Content Placeholder Programmatically?

Mar 31, 2011

I'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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DataSource Controls :: Iterate Through The Rows And Add The Data To A Placeholder?

Apr 21, 2010

I've got a datatable in a dataset which contains 44 rows. I can iterate through the rows and add the data to a placeholder - it's all there. However, if I bind a control (say a gridview or dropdownlist) to the datatable, all I get is one record (from the "middle" of the table). I get the same result when I create a dataview of the table - one row.

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Forms Data Controls :: HyperLink Added To Placeholder?

Sep 29, 2010

I have a Placeholder in which I added a Hyperlink (the hyperlink is an attachment in messaging application) how do I get the hyperlink to go hot when the user put there mouse over it:

[Code]....

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Forms Data Controls :: PlaceHolder Contents Not Shown After PostBack

Oct 5, 2010

I have a GridView control which contains a custom <pagertemplate> with a <asp:PlaceHolder runat="server" ID="plcPages"> control. The .aspx.cs file contains the following code:
protected void Page_Load(object sender, EventArgs e) {
... {Other Code} ...
GridViewRow pagerRow = GridView1.BottomPagerRow;
PlaceHolder PagePlc = (PlaceHolder)pagerRow.Cells[0].FindControl("plcPages");
Button btnPage;
int iPageNum;
for (int i = 0; i < GridView1.PageCount; i++) { iPageNum = i + 1;
btnPage = new Button(); btnPage.ID = "btnPage" + iPageNum.ToString();
btnPage.CommandName = "Page"; btnPage.CommandArgument = iPageNum.ToString();
btnPage.Text = " " + iPageNum.ToString() + " ";
PagePlc.Controls.Add(btnPage); } }

Everything works fine the first time the page is displayed. But, when I click any pager button, including the Next and Prev command buttons that are not part of the PlaceHolder, the contents of the PlaceHolder are never re-displayed. I know from searching other posts that the PlaceHolder contents are lost during the trip to the server, but I am already recreating them every time the page is loaded. They are just never being shown again. I've spent the last two days playing with ViewState And every other combination.

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Forms Data Controls :: How To Add And Access To Placeholder In A Repeater Control

Aug 16, 2010

i want to add and access to placeholder in a repeater control. for example,

[Code]....

how can i acces to placeholder, on codebehind. i couldn't acces with it's id.

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