There is a form on a webpage. It has 2 textboxes and a button. My ASP.NET application when run, should go to this webpage, fill the textboxes and press the button automatically. The webpage received after the button is pressed should be displayed.
Please help!
First you should have an event to receive the data on webform2, either by using session, viewstate, or querystring. Now use a condition to make sure the values are same with what you are expecting.
Private Sub Button1_Click()
//Process your data
End Sub
On Page_load of webform2, after receiving the values and processing them, you can click the button by calling the button click event, e.g.
Button1_Click(Me, e)
This will trigger the button click
Now, still based on the condition you should specify
Response.Redirect("PageName")
This should help
Related
I have a textbox called 'Value' (among other textboxes) on an ASP page. I have an event handler hooked up to the textbox so that when the textbox contents are changed, the event handler runs (control.textchanged event)
I have another command button ('Save') which saves the textbox value to the database and then calls window.close() via javascript. The problem is that when the textbox is changed and the user clicks on the 'Save' button without clicking off the textbox, the value is somehow saved in the database but the javascript does not run. Then, the user will think the value did not save because the window did not automatically close, and when they click 'save' again, the value in the textbox saves for a second time and then the javascript runs which closes the window.
It is very similar to this issue (http://forums.asp.net/t/523981.aspx?Pending+Postback+Troubles) but i do not understand the solution provided there.
Can anyone provide a method which may prevent the record being created twice in this instance?
Thanks,
c
I have the following scenario:
UserControlA contains a <asp:Button id="bSomeid" onClick="AddItem" /> with some code to an item to a shopping basket in AddItem.
UserControlB contains some LinkButton's that dynamically add a selection of UserControlA to the page in the OnClick event.
This is all done in an UpdatePanel. It is a little more complicated but I have pruned the information to what I believe is causing the problem, I will add more information if necessary.
The problem I have is that it takes 2 clicks for the AddItem event to trigger after I have added the items to the page after clicking the LinkButton.
I understand why this is happening - it is to late in the page cycle to register events for the next post back in the onclick - but can anyone think of a way around this? Can I force an event to be triggered on the next postback? I have tried to think of a way to run my code in page_load but I requuire access to the sender in the onClick.
Using .NET 4.0.
EDIT
I managed to find a way to get the link button sending the request in the Page_Load (using Request.Form["__EVENTTARGET"];) so I moved my code to the Page_load event. It still requires 2 clicks so I am assuming it isn't something to do with the onClick being registered to late.
Are there any other general things to check that could cause a button to require 2 clicks to post an event properly?
If your suspicion about being late in page life cycle is true then you can try using ScriptManager.RegisterAsyncPostBackControl method to register dynamically added controls in the link button click - considering that your button is within user control, you need to add public method into UserControlA that would actually register the button bSomeid1 and link button click from UserControlB would actually call the A control's method.
EDIT :
Another cause for button click not happening can be that button being dynamic control is not added in the page hierarchy when post-back happens (or it gets added very late in the page life cycle when the post back data is already processed). A really full-proof solution should add dynamic controls back to the page hierarchy in page_load it-self (and strictly maintaining same controls ids within hierarchy). If that's not possible then you can sniff the request (Request.Form) to detect the post-back.
In your case, you should ascertain if the button is indeed causing the post-back on each click. If yes, what is the POST data (Request.Form) for the first request - what is the __EVENTTARGET value on the first click (and post-back)? That should start your trouble-shooting.
On the other hand, a simple work-around could be to use html anchor element (you can still use link button) and have a javascript handler in the click event that would set some hidden variable and then submit the form (you can simulate the click on hidden button to trigger ASP.NET client side submit pipeline) . Now the hidden variable value can be used on the post-back to determine which link button has been clicked.
"Are there any other general things to check that could cause a button to require 2 clicks to post an event properly?"
Does it require two clicks on the control, or does it take accept a single click elsewhere on the screen, and then fire first time with a single click on the control?
I have my own (similar) issue with the Updatepanel where the first (expected) trigger does not fire and it seems that a single click elsewhere, and then the subsequent triggers fires first time (which totals 2 clicks)
[edit] Since you are working on this ATM, it may help me as well. Do you have a textbox with a trigger event on it? I do, and if I leave this blank (so that it does not fire) then there is no need for a second click.
I have a button on my page and and few textboxes which alters their context on page_load event. when I open the page for the first time it loads random data from a database to textboxes with a function in pageload and also I create those textboxes dynamically. what I want is to make some changes on textboxes texts and click the button than send new context of textboxes to database. But when I click on button, PageLoad event fires again and It regenerates the textboxes and the context of them alter naturally since they are newly created textboxes. I tried to use "if(!Page.isPostBack)" in pageload but then the textboxes and related objects are not being created and they become null.
how can I overcome this problem?
best thing I can think of is to find some way to fire buttons click event without firing PageLoad event, but I dont know how can I do it.
any help would be appreciated;)
From Comments
Can you regenerate the Textbox on each Page load Execution? and data assignment to these Textbox should be under !Page.IsPostback. All you have to do is to keep the IDs of the Textbox in ViewState only first time page load and next regeneration of Textbox will have the previous stored ID and you also have to store the ID corresponding data in ViewState. Makes sense?
I will describe my problem in simple way so it's not exactly what I'm trying to do but the idea is the same.Here is the problem:
I create dynamic buttons from code behind.I get some id from query string,create button with that id ,dynamic add event handler to click event,and add button to placeholder.I store the list of id-s in session and in page load method recreate these buttons and add to placeholder.One of the id-s is CurrentId and it's also stored in session.Buttons click handler do something like this
Button b=(Button)sender;
Session["CurrentId"]=Convert.ToInt32(b.ID);
In page load when I create buttons I want to set button text property different from others if id==Convert.ToInt32(Session["CurrentId"]) when list of id-s are gotten from session.But problem is that click event handler is called after page load,and when I create buttons in page load ,CurrentId in session hasn't been channged by click event handler.Can you suggest any solution to this situation?
It looks like you are attempting to update the buttons you have dynamically created after the click event has fired. Why not just change the button text within the click event as you have described?
i.e.
protected void button_Clicked(object sender, EventArgs e)
{
((Button)sender).Text = "Custom text for active button";
}
Also, you can always update the buttons on the PreRender event which occurs after the control click events but before the controls are served back down to the client.
I am calling my user control in a web page dynamically.
For the first time when I click the button on user control, the event is not firing. When I click the same for a second time, the events are firing..
Can anyone help me?
Sounds like the hookup to the button OnClick event is not occurring on every page load, which is required.
Can you guarantee that the hookup is being performed when you add the control and after a poastback to the page? I always put my event hooks in the Page_Init or Page_Load event handlers and outside of any Postback check. Try putting a breakpoint on the Handler hook up and see if the breakpoint gets "hit" twice.
An event hookup for a button would look similar to:
protected void Page_Load(object sender, EventArgs e)
{
btnSearch.Click += new EventHandler(btnSearch_Click); // breakpoint on this line
}
The client id of the control is derived from the ID of all containing controls that are marked with the INamingContainer interface. So, make sure that ALL controls in the hierarchy have a fixed ID.
For example if you have a Button control inside a Repeater, the ID of the button and the repeater are concatenated to make the client ID for the button. So both the repeater and the button should have the same ID across postbacks.
You can compare the HTML for the first request with the HTML of the second request to quickly determine if this is the problem.
Assign an ID for your dynamically created control -- otherwise no events will be fired.
Are you waiting for the download of full page before pressing the button?
The events are javascript functions hidden by ASP.Net in the page, that maybe not present at the time of your clicking.