Web Forms :: Render Page To String In Separate Thread?

Feb 24, 2010

I've got a page that I'm using as an e-mail template. I'd like to spin off a new thread, take the rendered page, and put it into an e-mail. Is this possible? If so, how? I haven't had luck so far.

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Sep 2, 2010

i have the code for asynchronous call to the database. i execute the sql command into the begin method that will executed onto the separate thread. now i want to execute the another database call asynchronously so that this also execute onto the separate thread. code for one database cal is here....

private SqlConnection con, con1;
private SqlCommand cmd, cmd1;
private SqlDataReader dr, dr1;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
AddOnPreRenderCompleteAsync(new BeginEventHandler(Begin),
new EndEventHandler(End)
);
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}
/////////////BEGIN METHOD
IAsyncResult Begin(object sender, EventArgs e,AsyncCallback cb, object state)
{
string connect = "Data Source=.\SQLEXPRESS;Asynchronous Processing=true;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True";
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However since adding threading to my project, the threads all get null reference exceptions when trying to retrieve this object.

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How To Render A Dynamic Page Only To A Text String To Then Be Able To Email It

May 20, 2010

Is there a way that I can create a page and master page and have some of the values dynamicly loaded thru selecting items in the querystring parameters.....

then is there a way that I can render that page only to a text string? by calling it with some querystring parameters and have it render to a string?

I guess my question is only the second part as I already know how to create a page with masterpage etc...

I also know how to create an email and snd it. I just dont know how to render the page to a string

I guess what I mean is that I want to render the page on the server in code behind and then have a text string which would be the rendered HTML in a string variable of some sort... I dont want to render the page to a users browser... in fact there would be no user at all connected (there is no need to be)What I want to do is (in a code module) load up a page created and stored in my wed app directory. I want to be able to load it from a code module and to bhe able to load it with some parametsrs and just get the rendered HTML.

I am trying to write a module which will send a HTML email to registered users and I want that HTML to be dynamicly created depending on some values in the recipient user,s profile.

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Render Output To String - Response.Flush Breaking Page Caching

Feb 3, 2010

I have some code that is used to replace certain page output with other text. The way I accomplish this is by setting the Response.Filter to a Stream, Flushing the Response, and then reading that Stream back into a string. From there I can manipulate the string and output the resulting code. You can see the basic code for this over at [URL] However, I noticed that Page Caching no longer works after the first Response.Flush call.

I put together a simple ASP.NET WebApp as an example. I have a Default.aspx with an @OutputCache set for 30 seconds. All this does is output DateTime.Now.ToLongTimeString(). I override Render. If I do a Response.Flush (even after the base.Render) the page does not get cached. This is regardless of any programmatic cacheability that I set. So it seems that Response.Flush completely undermines any page caching in use. Why is this?

extra credit: is there a way to accomplish what I want (render output to a string) that will not result in Page Cache getting bypassed?

ASPX Page:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TestCacheVsFlush._Default" %>
<%@ OutputCache Duration="30" VaryByParam="none" %>
<%= DateTime.Now.ToLongTimeString() %>

Code-behind (Page is Cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
}
Code-behind (Page is not cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Flush();
}
Code-behind (Page still is not cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Cache.SetCacheability(HttpCacheability.Server);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(30));
Response.Flush();
}

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Load Up A Asp.net Page Object And Render Its Contents To String From A Console Application?

Feb 9, 2011

I am trying to use aspx pages as an email templates. There will likely be a bunch of objects on the page which will be used as replacements in the html. Because it's an aspx page I'll be able to use databinding, repeaters, etc. At run time, I want to be able to instantiate the aspx page from its path, pass in a bunch of properties, and then get the rendered result of the page and email it. This seems pretty straightforward from a asp.net website (maybe using BuildManager or Server.Execute.) However, I want to be able to use the same templates via a console application by just loading up a page object from its filepath. Is this possible?

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Cross-thread Operation Not Valid: Accessed From A Thread Other Than The Thread It Was Created On

Apr 2, 2010

I want to remove checked items from checklistbox (winform control) in class file method which i am calling asynchronously using deletegate. but it showing me this error message:-

Cross-thread operation not valid: Control 'checkedListBox1' accessed from a thread other than the thread it was created on.

i have tried invoke required but again got the same error. Sample code is below:

[code]....

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Web Forms :: Render Controls From String?

Sep 29, 2010

Iam getting the below string in a variable"result" after xslt tranformation. if i do Page.ParseControl(result) iam able to render controls to the page. But the requirement is different. I have 4 place holders in that aspx page.I need to bind div id="Section1" to placeholder1, div id="Section2" to placeholder2 and similar the other two sections also to the corresponding place holder. how can i loop and add controls to corresponding place holder.

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<asp:RequiredFieldValidator ErrorMessage="Mandatory Field-1" runat="server" ControlToValidate="txtNameSection1" />

[Code]....

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Web Forms :: Render Controls From Html String?

Sep 29, 2010

Iam getting the below string in a variable"result" after xslt tranformation. if i do Page.ParseControl(result) iam able to render controls to the page. But the requirement is different. I have 4 place holders in that aspx page.I need to bind div id="Section1" to placeholder1, div id="Section2" to placeholder2 and similar the other two sections also to the corresponding place holder. how can i loop and add controls to corresponding place holder.

[Code]....

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Web Forms :: How To Render A Web User Control As String In HTML

May 12, 2010

i'm just new in ASP.Net.

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I have the following code:

Model:

[Code]....

Controller:

[Code]....

and the View:

[Code]....

The thing is that the HtmlContent string is getting "auto decoded" so the paragraph-elemnts gets renderd as <p>(sry might mix up decoding and encodeing..Im always getting confused by those)

anyway..I want the string to render as proper Html...how can this be achieved?

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Jul 13, 2010

I would like to get the html code a view would generate in a string, modify it in my controller, then add it to my JsonResult.

I found code that would do what i'm talking about from a partial. I would like to do it from an aspx View though.

Extra explanation:

Let's say I have a page Frame.aspx that /Controller/Frame will return I would like to get my hand on the response before it out so I can to wrap it with jsonp. I do not wish to edit the return result in code every time, this is why I want to load the view programmatically.

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Let's say there's a function that renders a view in a string builder

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now take sb and wrap it with jsonp:

[code]....

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C# - How To Dynamically Render Controls From String

Feb 28, 2010

Let's say I have a string that I retrieve from a DB like: "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et {{Hyperlink|navigateurl='/foo.aspx'}} dolore magna aliquyam."

This string may now get assigned to the Text-property of a label. What I want is to parse {{Hyperlink|navigateurl='/foo.aspx'}} and replace it with

<asp:HyperLink ID="IDLink" runat="server" Text="foo" NavigateUrl="/foo.aspx"/>

and assign the whole text including the HyperLink-Control to the Label.

Is that even possible? I think I could use reflection to create the control and set the properties. (the HyperLink-Control was just an example) But can I manage to insert the asp.net control back into the string to ensure the hyperlinks rendering as server contorl?

I hope you understand what I want. If not, feel free to post comments.

Edit1:

what do you mean by "assign the whole text including the HyperLink-Control to the Label."? can you xplain a bit, the reason for doing so ?

I think it won't work to assign the control into the string, because a asp.net control cannot be fit into a string.

After some thinking I found a way to achieve my goal. That would be to create a placeholder (I name it A). Therein some Literal control will be added. In addition I would create a placeholder (I name it B), add my Hyperlink into B, and add A into B. But I think is way to overkill.

The reason why I started thinking about this, was to gain access to Server.MapPath without replacing occurences in the string. I want to be able to use relative paths in my CMS, that get rendered like the NavigateUrl property from a hyperlink. Nevertheless I think my question with the dynamically creation is worth thinking about

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I am trying to render a hyperlink to html. ( etc)

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"../Folder/Mypage.aspx?498592ghjgfosdfgo"

It is set identically both times(load and updatepanel postback) but when i try to render it to html the second time (on the update panel) it adds "../" to the front so i end up with

"../../Folder/Mypage.aspx?498592ghjgfosdfgo"

The function where it changes here

Public Shared Function RenderControl(ByVal c As Control) As String
Dim sw As New IO.StringWriter
Dim htmlw As New HtmlTextWriter(sw)
c.RenderControl(htmlw)
Return sw.ToString
End Function

c is the hyperlink which has the propertry navigationurl (this never gets changed) but the sw which ends up looking like this on load

<a id="lnkView" href="../Folder/mypage.aspx?AnTfh0ZsFP9NCxiBpM+Zd11cI+AUOF93HZQtumPgzMKky0PejGrda9I6kCFn070dOsIfq0M2AgI=">View</a>}

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Here is a quick example of how I use threading:

[code].....

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[Code]....

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lock (this)
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what the best approach would be to achieving this? So far I have set up a dataset with a dataadapter and table for each connection and then linked the tables in the dataset. The problem that I'm having is getting the linked resultsets to work.

On my form I have the datagrid with two Objectdatasources one for each dataadapter and i believe that's where I'm going wrong...

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