I have created one form. In that form, after clicking on button shows data in grid.This is working properly, no problem. When I am writing Response.Write(), inside the function to find out the sql query, getting this error. I used update panel, inside that put button and gridview.
Response.write can't be use in updatepanel .
use label or span to show data
Refer : http://www.jnouel.net/post/2009/07/06/ResponseWrite-and-UpdatePanel.aspx
http://www.dotnetpete.com/post/2008/09/18/ResponseWrite-within-an-update-panel.aspx
Related
When binding text/data to a TextBox, it is done like
#Html.TextAreaFor(model=> model.Question)
but, when the PostBack happens, the text shows up in the TextBox. Is there a way to still bind the data to the textbox, but not display the text in the textbox?
I have a search functionality on my website, and when someone searches I want the results page to have the textbox without the text (the searched word).
You've said Postback, so you're using Server side implementation, right?
If that's the case, the simplest way is to add a script that runs every page load.
For example, you have this search textbox:
<input type="textbox" id="search">
In your javascript :
<script type="text/javacript">
$(document).ready(function{
//get the attribute of the search textbox and clear the text
$('#search').val('');
});
</script>
If you're using Ajax implementation then just add a script when your form post succeeds.
You should set the Question property to null or empty on the controller action before displaying the result, or also you make it empty after the page is loaded in the document ready method using jquery.
I have an repeater in an update panel. The repeater has a button and a grid. At runtime, there would be as many as 4 buttons to 4 grids. When button is clicked, data will be bound to the grid associated with it. I want the partial postback on the grids so that if I click one button and data is bound to grid1, if I click another button to bind grid2, I don't want to lose the data already bound to grid1.
I understand controls inside update panel causes a partial page update. But I get an error when I click on the dynamic buttons (similar to the error below).
I get an error if I try to register the button as ScriptManager.GetCurrent(Page).RegisterAsyncPostBackControl:
Error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near 'SessionSession342066'.
but I don't get an error if I register the button as ScriptManager.GetCurrent(Page).RegisterPostBackControl. However, the latter will do a full postback of the entire repeater.
Because the id's are dynamic, I can't seem to add them to the <Triggers>...
Any suggestions?
Couldn't you abandon the use of the updatepanel and use pure jQuery with web methods instead? In that way, you could update any portion of the repeater at will without a postback.
I have a RegularExpressionValidator for a TextBox in a control, which itself is part of another control. When I click the button to submit the form, it seems that it should not do so unless all child controls are properly validated. However, what ends up happening is that I see the validation error message pop up for each control that failed to validate before the page posts back anyway and fails when it can't parse the malformed input.
I have tried surrounding the failing code with if (Page.IsValid) {...} to make sure it doesn't run without complete validation, but the property ends up being true by the time I hit the breakpoint.
Shouldn't an entire page be invalid if any child controls are not successfully validated?
Do you have different ValidationGroup controls defined? As long as the validators in the same validation group as the button are all setup correctly, yes it should block. Unless, for some reason, the JS is failing to load for the validators.
HTH.
Set "CausesValidation = true " to your submit button, I guess your problem will be solved.
Have you called Page.Validate() before using Page.IsValid ?
I have just create a very basic Dynamic Data web application using Entity Framework, and when I click the edit command from the GridView, to open a Details view, edit some fields, and click the Update link, nothing happens.
My question is what could cause this update to do nothing and are there any tips for diagnosing it?
MORE INFO It seems the EntityDataSource 'hides' exceptions. I have found more than one reason for the update or insert operation not completing, but I had to use a SQL trace and trap the command being sent. Running that command manually gives a quick and visible SQL error. Why this doesn't find its way to my UI is a mystery.
In general, anytime you are debugging or developing a Dynamic Data website, one should goto the Site.master file and set the ScriptManager's attribute EnablePartialRendering to false:
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="false"/>
This will make exceptions more apparent that otherwise seem to be swept under the rug because of the use of Update Panels that wrap around the DetailsView, FormViews and GridViews on the List/Edit/Insert/Details/ListDetails page templates.
I think the real problem you are running into has something to do with error handling and update panels. When debugging in IE, do you see a little exclamation point in the bottom left of the screen? If so, click on it and you will see the javascript error (Sys.WebForms.PageRequestManagerServerErrorException) that has occured because of the unhandled exception.
For more on this, check out ScottGu's Blog on the topic.
#Aaron's comment: that is too early to capture the errors he is referring to. I think, in this scenario, he wants to handle the Updated event because the EntitydataSource will not actually throw an exception until after it gives this event's handlers a chance to run: (MSDN):
If an error occurs when changes are
persisted to the data source, the
Updated event is raised and the
Exception property of the
EntityDataSourceChangedEventArgs
object is set to the returned
Exception. If you handle the exception
in the Updated event handler, set the
ExceptionHandled property to true.
This prevents the exception from being
raised again. When you specify a value
of false for the ExceptionHandled
property, the EntityDataSource
re-raises the exception.
If I am trying to update data from a DetailsView control I'd mostly rely on code behind techniques. I believe there is an ItemCommand fired when you click on any of the DetailView's standard buttons. So inside of these events you have to figure out which button fired the event and take necessary action.
But since your detailsview sits inside a gridview edit template, I suggest you wire the events manually; incorporate them in your markup manually.
...And the update you click is on the DetailsView and not the gridview; so remember to cancel the gridview's editing mode and rebind the gridview.
Hope this helps !!!
A situation requires me to order javascript code on a page be executed with an argument calculated in codebehind in ASP.NET
Here is the situation:
I have a page called search.aspx . This page contains a button and a textbox. Users put their arguments for search in the textbox and then click the button. The button posts back and runs a button click method. This code behind logic (running on the server) serializes and inserts the contents of the textbox to a DB.
Assuming a rowID or something to identify the serialized query by will be returned inside the button click method, how can I then tell the page (search.aspx) to open a new tab with results.aspx?query=.
I know I have to use javascript as the code behind can't open a new tab, but I am just wondering how to do so.
I've never used JS so a maximum amount of details in the answer is better.
Assuming your rowID is loaded in a variable named, well, rowID, then put this at the end of your click event (VB.Net):
ClientScript.RegisterStartupScript(me.GetType(), "results", _
string.Format("window.open('results.aspx?query={0}','Search Results','status=1')", rowID), True )
To directly answer your question, you can insert something like the following directly in the page output just before the body end tag.
<script type="text/javascript">
window.open("http://servername/pagename.aspx?queryid=blah");
</script>
by using Response.Write.
However, did you also consider simply opening a new window on the button click with the button's text passed in as a query string to an aspx page?