I am making an asp.net web application which has to play videos. In my start page I have a hyperlink for each video. All the hyperlinks are identical, except their names. This Means they all link to the same page. Im interrested in knowing wether there is an option to know which hyperlink was clicked. I would like to retrieve the name of the hyperlink.
My code for generating the hyperlinks looks as follows:
foreach (FileInfo i in corFiles)
{
HyperLink t = new HyperLink();
t.Text = i.Name;
t.NavigateUrl = "page.aspx";
CorrectArray.Add(t);
}
return CorrectArray;
The text of the hyperlink is Unique to a video, which Means I can change the src destination of the video to play based on the text name. So the question goes as follows. Are there any way of retrieving the text name of the hyperlink when it is clicked by the user?
I hope you can help! Thanks in advance.
Regards
Magnus
You can add a link buttons instead of hyper links, if you want to make a post back to the same page.
foreach (FileInfo i in corFiles)
{
LinkButton t = new LinkButton();
t.Text = i.Name;
t.Click += new EventHandler(DynamicClick);
t.CommandName = i.Name;
CorrectArray.Add(t);
}
void DynamicCommand(Object sender, CommandEventArgs e)
{
// using e.CommandName and e.CommandArgument you can differentiate the hyperlinks
}
If i understood your question,
you have to add the name attribute in the hyperlink tag and get its values in the code behind by fetching names
You can use JQuery that is integrated into .NET to get the text of the hyperlink upon it is clicked by the user. To be able to access the Hyperlink's text from Javascript simply add it to a custon tag inside the link to have something like this <a href="page.aspx" htext="hyperlink text">. As the hyperlink html is generated from .NET server side code you have to generate this custom tag from the .NET server side context.
Why don't you use a Querystring?
t.NavigateUrl = "page.aspx?video=<someid>"
and in the page you parse the querystring to show the correct video?
Related
I have a panel that gets a hyperlink added dynamiclly through C# with values from an sql database.
However some of the URLs are really long and quite uneccessary to display.
I have not found any good ways to hide/disable the url showing and replace it with text. I can not use normal <a href> as it handled server side.
EDIT added some of the code.
<asp:HyperLink ID="moduleHyperlink" runat="server"></asp:HyperLink>
now in C#
HyperLink hyp = createHyperlink(btn.link);
moduleHyperlink.Controls.Add(hyp);
This will display for the user the entire btn.link (url string) which might be really long and it looks messy on the webpage. I would rather have a text saying "External Link", which when clicked redirects the user to the url.
You can add Text property to show some valid link title instead of showing the URL.
HyperLink hyp = createHyperlink(btn.link);
hyp.Text = "YourTextForTheLink";
moduleHyperlink.Controls.Add(hyp);`
I have a asp.net page that has a button to click. When click on it, I wish to have a querystring such as ?id=1 added after the normal url. How can I do that from server side c# code?
Three ways... server-side redirect, LinkButton, and client-side button or link.
You can have your button event handler redirect to a location with a querystring...
Response.Redirect("myPage.aspx?id=" + myId.toString(), true);
You can render the button as a LinkButton and set the URL...
LinkButton myLinkButton = new LinkButton("myPage.aspx?id=" + myId.toString(), true);
Or, you can render the button as a client side link - this is what I do when using Repeater controls...
<a href='myPage.aspx?id=<%# Eval("myID") %>'>Link</a>
I prefer the last method, particularly when I need a whole bunch of links.
BTW, this is application of KISS - all you need is a regular old link, you don't need to jump through server-side hoops to create a link with a querystring in it. Using regular client-side HTML whenever possible is how to keep ASP.Net simple. I don't see enough of that technique in the wild.
I realize this is an old question, but I had the exact same problem when we wanted to create a new URL string so Google Analytics could "count" when a form was submitted.
I was using an ASP:Button to submit the form and saving to a database and displaying a thank-you message on postback. Therefore, the URL pre- and post-submit was the same, and I had to modify it in some way.
I used the following code and it worked for me:
C#, in Page_Load:
btnSubmit.PostBackUrl = "Page.aspx?id=" + id.ToString() + "&newquerystring=newvalue";
where Page.aspx is the page with the button that I want to postback to (the same page), ID is a dynamic ID I'm using to grab content from our CMS, and obviously the new querystring item.
I hope this helps.
There are various way to add querystring in url. You can use following code If you want to add value on server side:
protected void Button_Click(object sender, EventArgs e)
{
Int32 id = 1;
// Or your logic to generate id
string url = String.Format("anypage.aspx?id={0}",id.ToString());
}
How to build a query string for a URL in C#?
Or you can use this code.
string url = Request.Url.GetLeftPart(UriPartial.Path);
url += (Request.QueryString.ToString() == "" ) ? "?pagenum=1" : "?" + Request.QueryString.ToString() + "&pagenum=1";
I am starting a new asp.net web app class (using c#). For my first lab I need to create a simple web page with a couple button. I have already made the page with the buttons and text. When you press the button it needs to change the text color using in-line css. How would I go about adding the in-line css to the button. Would I add some sort of C# code in the button to enable css? I am quite confused how to add the css to the web app. Any ideas?
From your question it sounds like you want to add inline css to some sort of element containing text when you click a Button?
protected void btn_Click(object sender, EventArgs e)
{
string inlineCss = "your css goes here";
//I'm assuming the text you want to apply css to is a Label with ID=label
label.Attributes.Add("style", inlineCss);
}
Try this on click event
HtmlLink css = new HtmlLink();
css.Href = "css/fancyforms.css";
css.Attributes["rel"] = "stylesheet";
css.Attributes["type"] = "text/css";
css.Attributes["media"] = "all";
Page.Header.Controls.Add(css);
If needs inline
txtmyCtrl.Style.Add(HtmlTextWriterStyle.Color,"#33cc45");
In my application I have DataSet containing name and Id of user and I want to create a dynamic hyperlink of the all the user name. Please anyone tell me how to create dynamic hyperlink using C#.
As #Ashley John said,
HyperLink DynLink = new HyperLink();
DynLink.ID = "DynLink";
DynLink.Text = "This Link Is been Created Dynamically from code behind";
DynLink.NavigateUrl = "~/TestPage.aspx";
PlaceHolder1.Controls.Add(DynLink);
I have used a placeholder as a container to hold the dynamically generated Hyperlink..
Create a new instance of Hyperlink Control
Set its URL property.
Add the Control to the placeholder(or Gridview controls collection if you are using it inside a Gridview) where you want it to get displayed.
Use a Asp.Net HyperLink control. You can create the url passed to the Hyperlink control by using String.Format().
If you want to create a list of all hyperlinks you could have a look at the Repeater and use Eval("...") in the template to render out the link. That way, you can define more in markup then in code.
We can create Dynamic Hyperlink using following Syntax:
<asp:DynamicHyperlink
ID="string"
Action="Details|Edit|Insert|List"
ContextTypeName="string"
DataField="string"
TableName="string"
OnDataBinding="DataBinding event handler"
OnPreRender="PreRender event handler"/>
For more detail just go to this link. You will get a Demo Project Showing use of Dynamic Hyperlink and Linq.
I have a list of 10 hyperlink on default1.apx. On selecting any hyperlink it redirects to another page and all hyperlinks redirects to the same page default2.aspx. But how can i now which hyperlink is clicked from 10 hyperlinks list in asp.net using C#.
There are a couple of ways, all depending on how you're doing your redirect.
I'm guessing you're using Response.Redirect(), which means you must be raising a server side event when clicking. In this case all you need to do is check the sender argument which will give you details of which control was clicked.
Another way is to append the controls' name onto the URL in a GET request. So that each link is slightly different. For example link one could point to default2.aspx?linkthatwasclicked='link1' where you can substiute link1 accordingly, this value can then be retreived on default2.aspx through the Request.QueryString object.
m.edmondson has got it, another way I've seen is having a "hyperlink.aspx" page which then requests an id:
Link 1
then in the hyperlink.aspx code:
int id = int.Parse(Request.QueryString["id"].ToString());
switch(id)
{
case 1:
// Add a count to a table maybe
// Get the url from the DB here...
string url = GetUrlById(id);
Response.Redirect(url);
break;
}