C# - Click Ahref By Programmatically With HTMLElement Control?
Mar 15, 2011
I load a webpage into my windows form and load it in WebBrowser control. Then, I need to click on a ahref from the WebBrowser programatically.. i wonder how i do it.. for example:
< a href = "http://www.google.com"> Google me < /a >
< a href = "http://www.facebook.com" id="fbLink"> facebook me < /a >
the above are 2 different conditons. the first one without id, the second one is with id..
I have a detailsview control which I use to enter data and save to the database. The control is connected to the db through a objectdatasource. When the insert is successful, I want to set some variables and redirect the page to a different one. The detailsview control has AutoGenerateInsertButton="True". I don't know how to access the insert button click event in the code behind,
I need to make a Function that receives a Session Key and a Session Value and call this function on a normal HTML onClick event. When this function is called the Session variable is assigned the Key I sent with the Value I sent. So far I have this:
I'm trying to use one ImageButton as both a login button and a logout button. Initially its a login button. I click the button once and it runs the login click handler and pops up a text box to type in a password. Then I enter the password to login. Inside the password box's submit handler I check to see if the password is valid. If it is, I enable all the password protected functionality on the page, change the button's image from the login image to the logout image, and change the button's click handler from the login Click handler to the logout Click handler.
So far my code just swaps the button's image but the click handler never changes to the logout handler. I have tried two ways of changing the ImageButton's click handler programmatically and both have failed:
loginBtn -= new ImageClickEventHandler(loginBtn_Click); loginBtn += new ImageClickEventHandler(logoutBtn_Click);
Neither the login text box or the login/logout button are inside an UpdatePanel. EnableViewState is set to the default of true. Does anyone see what is preventing the Click handler from being changed?
I'd like to invoke a button click event on an ASP.net page programmatically, using c#. I don't have access to the server-side of the page, so i can't invoke the function directly.
I need to generate a gridview with dynamic columns, on each cell I need a button that inserts-deletes a relationship in a database. The relationship is of course between what is represented by each column and row. I decided to use a gridview and create templatefields which I add programmatically to the table. I successfully got to that point but when i decided to raise a click event from the buttons or a rowcommand from the gridview I could not do it. I´m looking into doing this with button fields right now but I´m curious on how this can be accomplished?
The error which I am getting is on 'Page.Controls.Add(hl);' and here is the explanation: The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases. What can I do so I can fix this issue.
I have a blank/unbound GridView control on my form and I am binding it in the code behind like this:
GridView1.DataSource = _dataSet DataBind()
Running this code populates my GridView control with all the columns and data that _dataSet has. I want to display only some of the columns, change the column names, and rearrange some of these columns too (i want the last column from the actual sql database table to be displayed first in my GridView).
Suppose I have a user control MyControl.ascx, and I put it in the Default.aspx like this:
<uc1:MyControl id="MyControl" runat="server">
Now in the code-behind of Default.aspx I do this:
[code]....
The problem is that even I do not render MyControl, it is still being initialised and goes through the entire ASCX life cycle (OnLoad, etc). Is there a way to prevent the control from being initialised at all?
I am adding validator controls to a page on runtime. When I do this it seems to work except for one thing: the page doesn't get validated (the Validate() method is not invoked) - neither on the client nor on the server. However when I can Validate() myself, the validators do their work and generate the required errors. So it looks like the simple fact of adding a validator programmatically causes the page validation to not take place. My page does have validators in the aspx file - they work fine when I don't add any programatically, but as soon as I do add one programatically, the Validate() method is not invoked.
The way I add the validators is by creating an instance, giving values to all relevant properties, and then adding to the page control collection. I tried this in the PageLoad, and prior page-cycle events. The same result occured. I also tried with or without having a ValidationGroup, and with or without having a ValidationSummary control on the page. The same result occured.
I have a user control that needs to load a child control when a button is clicked. The trouble is that it has to request the control from another class.
So in the button click event, I call the function to get me my control, and add it to the page, like this:
I have code to add a control to page in Init event. I hit error "The control collection cannot be changed during DataBind, Init, Load, PreRender and Unload phrase".
The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.
ive created my own custom control, now in the code behind of the custom control file i can add Name.Click += new EventHandler(name); but on the codebehind of the page where ive used the custom control i cannot, is there anyway i can regsiter it as an available attribute to add? my code below and on the image the test codebehind click is not available, how can i get it?
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class LargeButton : System.Web.UI.UserControl { public string JSFunc { get; set; } public string SSFunc { get; set; } public string ImgName { get; set; } public string LinkText { get; set; } protected void Page_Load(object sender, EventArgs e) { Link.Attributes.Add("onclick", "javascript:"+ JSFunc + ";"); Link.HRef = "javascript:;"; Link.Title = LinkText; Img.Src = "~/App_Themes/" + Page.Theme + "/Images/Icons32/" + ImgName; Img.Alt = LinkText; //Link.ServerClick += new EventHandler(asd); } } <%@ Control Language="C#" AutoEventWireup="true" CodeFile="LargeButton.ascx.cs" Inherits="LargeButton" %> <a ID="Link" runat="server" class="MenuItemLarge" clientidmode="Static" > <img ID="Img" align="center" runat="server"/> <br /> <%= LinkText %> </a> <MB:LgButton runat="server" ID="Save" JSFunc="Save(this)" ImgName="save_32.png" LinkText="Save" />
This may be a very dumb question but I can't seem to get it working. I use at many places the following syntax for dynamically binding a property of a control in aspx file to the resource entry, e.g.
But this doesn't seem to work, it simply sets the text to the exact expression without evaluating it. I am using ASP.NET 3.5 btw.
I have tried the databinding approach but I get an HttpParseException saying Databinding expressions are only supported on objects that have a DataBinding event.
I want to add event handlers programmatically to the server controls rather than using their predefined OnClick properties, etc. But which would be considered a better practice for defining handlers:
I've an asp menu on my site. I need to dynamically populate this from my database depending on a choice made by the user.
Basically, when entering the site the User chooses a product category and this selection determines the options in my menu. I'm totally lost as to how to populate my menu each time the user changes their category - I've only ever hardcoded in the values to a this menu type so I've no idea how to programmatically populate it.
From what I can gather, it seems that its best to populate the menu via XML - if this is so could someone post a sample of what this XML structure (or let me know ehere I can view this)
Why is the skin not beeing applied to the control. If i declare the control in my aspx page it works ok, but if I try to do it programatically it does not work...
I'm creating a custom templated composite control. If there is no 'ItemTemplate' specified in the mark-up, how do I create a default template programmatically?
I have a div runing on server in which i programmatically add images. On post back, id like to get some attributtes from those images, but they are nowhere to be found. What am i doing wrong?