I want to access the raw HTML code that my ASP.NET System.Web.UI.Page is about to render.
How can i do that? Is there a property or method like System.Web.UI.Page.HTML or something like that.
I know I could loop through the Controls List of the page and get access to all the Literal Controls etc, but I was wondering if there's a direct property or method that can return me the raw html, which I can modify just before rendering the page.
I have a Master Page as well as a standard Web Form aspx file. What if I wanted to dynamically modify the complete HTML markup in an aspx file (perhaps based on a conditional statement - perhaps in a specific content place holder), how would I go about doing this? Sorry I'm coming from a PHP background so this is why I'm asking such a simple question.
Is there some way to intercept the HTML output stream in asp.net and make modifications? Eg using httpmodules or something? I know this is possible using java servlets and assume there must be an elegant way to do this with asp.net.
My purpose is to combine the many javascript files into one composite script which has been minified/packed, to make the page load faster.Eg, if my page normally outputs the following in the page head:
I have a control on a page. In the control's pre-render event I'm executing some code that's taking about a minute to execute. This means the whole page is unresponsive until the control's pre-render event is finished executing.I tried putting the control inside an update panel, but it doesn't matter the rest of the page still won't render until the pre-render event of the control is finished executing. I've attached a very simple example of my code (The event that's slowing up the control's pre-render event is not Thread.Sleep(1000):
Can I modify the properties of a content page control from an event fired from the master page?create a delegate and event on master page wire up the master page in the content page create the event handler (function) on the content page modify for example:
contents of the Text property of a textbox render a control visible (or hidden) etc...
It is easy enough to add a required field validator to this page like this.
<asp:RequiredFieldValidator ID="valMyTextBox" runat="server" ControlToValidate="txtMyTextBox" ErrorMessage="My Text Box is required."></asp:RequiredFieldValidator>
But I need to modify the HTML slightly if this text box fails validation. I need to add a CSS class to the DIV. So if the user leaves this field blank I need the HTML to look like this:
Is this possible? I can't figure out if there is a way to write code behind that only fires if this particular validator control fails validation or something. I know I can write code that runs when the entire page is not valid. But I just want this code to run when this validator returns invalid. Hope this makes sense.
I'm thinking there has to be an efficient and OO way to do this.
I have several textboxes on a data entry page. When I need to make a new entry, I have to clear the text field before making new entries and this has to be done for quite a number of textboxes and across several pages.
Is there a way to use the FindControl method to locate all textboxes on a page and clear their textfields probably using a loop of some sorts?
I have been trying to find out how I can allow a user to modify/update a page/pages on a web site. I understand there has to be site security with authentication and authorisation but what is there as a user interface for them easily to update a page?
It's really usefull! But the inherits tag is made with project's directories (the file is in de RESSHUM directory) but I prefer to delete this part and have this:
...Inherits="PAGODE.Rh_Acceuil ...
But I have to do that manually each time..
So, is it possible to set an option with the aim of Visual Studio don't care about directories when he make this nameSpace?
I created a master page and have several aspx page using it. Now I want to change each of the background image of the page that is using the master page. I used dreamweaver to change its background image but I get an error :
Only Content controls are allowed directly in a content page that contains Content control
How could I modify the background image of each of the content page??
I want to show the current date and time in the Web Site but retrieved from a table in the data base. This table contain a preloaded .csv. I want to put something like: Date: datefromrow Time: timefromrow
However, I dont know how to connect it on here with the C# code.
[Code]....
[Code]....
I tried the page control, but it is not placing in the place I want...
I have couple of controls in the page. I need to modify these value in Page method. How can I do that?. When I modify those values in page method should reflect in page?
As in asp.net I can change or modify the design of my web page about it being online and that these changes are saved permanently afectondo the page source.
I have been led to believe that the best point to bind your controls is the PreRender. As all the controls are ready and this is the last stage before rendering etc. Is this correct or should controls be bound at a different point?
Would a call to a database be called if you put the databind method in the PreRender event of a listbox and the listbox was rendered on the screen for example? This is a specific example regarding a listbox, but basically does code in PreRender only get called if the control is rendered on the screen. If this is so, is it good practice to put code into PreRender such as databinding?
When deleting a GridView row in the UI (via a LinkButton whose CommandName="Delete"), the view does not automatically refresh and continues to display the deleted row until I take some other action (manually refresh page, navigate away and back again, etc).
In the debugger, I see the row is successfully deleted, and both the RowDeleting and RowDeleted events fire, but the GridView's PreRender event does not fire afterwards (in contrast, that PreRender event does fire when first loading the page, when adding a new row, etc).
I've used GridViews in similar configurations without having this problem, but I don't see obvious differences. It seems the process is aborting before the PreRender event, but no exceptions are being thrown, and stepping off the end of the RowDeleted event in the debugger brings me back to the UI as though the process were completing normally.
where I should look for the trouble or a solution? Other possibly-relevant details: the GridView is bound to a SqlDataSource; the data source does not declare any DeleteCommand; I handle the deletion by calling a stored procedure in the RowCommand handler, after which I rebind the GridView with DataBind(), at which point I can see the GridView's Rows.Count has decreased by one as I'd expect. Everything seems fine through the RowDeleted event, then... nothing!
UPDATE: tried calling the SP to delete in the RowDeleting handler rather than RowCommand handler... made no difference. The row is still deleted but processing terminates without calling the GridView's PreRender, and the deleted row is left on display until some further UI interaction updates the view.
UPDATE2: I'm not even getting the Page's PreRender event, which precedes the control PreRender events. Will continue working backwards to see if I can find where things are halting, since stepping out of the RowDeleted event seems to be the end of the line...
UPDATE3: I've been poking around some more and, although it complicates my code, I was able to get things working by declaring a DeleteCommand in the GridView's SqlDataSource that just does the simple row (record) deletion, and then in the RowDeleted handler calling the additional stuff I had in my stored procedure that needs to happen along with the primary deletion. While it's less convenient having the primary deletion in one place and the related processing in another, at least it's working.
But I don't know what to conclude from this: that a DeleteCommand is needed for proper page life cycle? that one shouldn't do a deletion in a stored procedure in the RowCommand handler? something else? I wish I could identify what, specifically, is broken about my initial attempt...
I have a site with about 7-8 tab panels with update panels. On all the other tabs there doesn't seem to be a problem except the newest tab I created outside of the project and then piece by piece brought on.To make a long story short -
Users selected a dropdownlist outside of the panels and based on what they select certain tabs display.
Both inside the selectedchange of that dropdownlist I have -
[Code]....
Which just double checks the dropdown since there is a change if the select portion isnt at the top insert it. I also have in the pre-render of that dropdownlist9 the following - [Code]....
Which is supposed to put the select into the dropdownmenu. But for just this dropdownmenu for reasons beyond me after the first dropdownlist is changed the select statements are not at the top of dropdownlist9. But on the 2nd change and there after they are inserted.
Really running around circles with this. The microsoft visual studio just seems so odd and unrelievable lately.
I need to dynamically modify the contents of a column in a GridView1 before it is displayed. Basically, I need to convert every 'Environment.NewLine' in a field to a so it displays as a new line on an ASP.NET page. How do I do this?
In my gridview I have fields for inserting a new record in the footer.
In my objectdatasource selecting event if no records came back I bind a single mock row to force the footer to show so they can still add records. Since the row does not contain real data I hide the row.
I am creating Dynamic UserControls with Dynamic AjaxControls. Then I store each of the UserControls in a Collection. On Postback I recall the UserControls in the collection to Re-Create the interface. It works if i only use Standard HTML controls but does NOT work with AJAX controls. I get this error on PostBack Extender controls may not be registered after PreRender. So far I have tried the following:
MyBase.OnPreRender(e) in Page and Usercontrol EnsureChildControls() in the OnInit Added ScriptManager to the MasterPage None of this stuff is working... If I re-create all the controls including the ones inside the usercontrol then i get no error however it takes forever to do a postback as opposed to just recalling the collection of UserControls.
