What is the best practice to force the postback Data and ViewState data to be re-loaded on the code behind?
The reason I ask this is, i have one gridview which is generated dynamically and I when it is structure is generated the postback data is already loaded and I want to forse asp.net to reload the postback data once I have my gridView structure is generated.
How can I achieve this?
When I create a new record by submitting an .aspx page the new record is not showing up. I have to navigate away from the page and back to it for the new data to show.
How do I refresh the data up reload??
I've been playing around with a .NET ActiveX control in a web page as a possible solution to a particular situation. I set up a .NET user control project, added some UI controls, and eventually got the DLL to load in Internet Explorer and run. However, I've run into two problems.
1) I've tested it on two Win XP PC's, one with IE7 and the other with IE8. Everything works fine in IE8, but I get various permissions errors in IE7. Both machines have the same security settings in IE (it's in the trusted site zone, all ActiveX relating settings are the same, etc.). Does IE7 somehow interact with .NET differently then IE8? So far I've only been able to test it on the two machines.
2) Is there any way to force IE to reload the .dll from the server? I've tried everything I know (F5, Ctrl-F5, Ctrl-Refresh Button, Alt-D Enter, etc.), but it seems like IE randomly loads different versions of the .dll. Closing IE and restarting usually gets it to load the latest version, but that's not very convenient when making mods and testing them.
I have run into the problem where my css files are being cached in browsers. This is a fairly common problem, and a common solution is to simple add a version number in the url to the css file. Example: MyCSS.css?ver=1.12
However, I'm using a custom skin for DotNetNuke which forces the usage of the file: skin.css
I don't have a way to point browsers to skin.css?ver=1.12 (or at least I'm not aware of a way)
Are there any tricks I can play with IIS, DNN, or ASP.NET (default.aspx file for DNN perhaps?) to force clients to reload CSS?
I have a gridview control where clicking on a specific row saves an ID number to session("ReportID") and then brings up a popup window. The popup window checks session("ReportID") on load and then displays the correct report information. This setup seems to work fine in Firefox and Safari, but for some reason IE is not refreshing the popup window. I'm trying to figure out a way to force IE to refresh/reload the popup window like it does in firefox/safari. If the popup is not refreshed then it won't update the information on page_load. Code below:
[Code]....
I thought that window.open should automaticly reload the page in the called popup window as this is what FF and safari seems to do, but maybe not. I think that the javascript .reload() may force IE to refresh the popup, but I don't know what the correct syntax would be.
I have a grid where user will click on a button provided in each row to download the file.
After each download I want to update the download attempt.
but since I am using force download my databind method does not make any difference in the page.
I have an input form on a page along with gridview and combo box. a user first select a filter combo box then click on search, to see a return values in a grid view format. then a user can enter new row once he / she cick add, i want the page to reload and the new inserted value to show in the gridview.
View 1 RepliesI've seen "What is an elegant way to force browsers to reload cached CSS/JS files?" but the answer there uses PHP and it doesn't address the fact that the CSS is injected dynamically by an ASP.Net Theme.
View 2 RepliesI've created a UserControl that is dynamically placed onto my page during the Init event. It populates and works great, but I'm left scratching my head at how to retrieve data from it during a postback.
It's effectively a multipick combobox that is manipulated entirely using clientside JavaScript (I'm using jQuery heavily). Inside the control container element, I render an empty DIV element that contains all of the selected items. As the user selects items, I generate DIVs within that container DIV that includes some markup. Of interest to me on the server side are the contents of a couple of INPUT fields.
After selecting an item, the rendered HTML looks something like:
[code]....
I may be completely off track and this may actually be impossible (or a stupid idea). The only alternative I can think of is to emit actual ASP.NET controls and hook the built-in event handlers.
I am populating a dropdown on page load and the user selects an item, click a button (to create a new site in sharepoint) I then want this new site to be shown in the dropdown but I can't get it to work properly. Either the items are duplicated or the selected value is null.
so on page_load I have
getSites();
if the page is a postback I want to reload the dropdown with the new item
if(Page.IsPostBack)
{
getSites();
}
but this of course duplicates all the values so I tried
if(Page.IsPostBack)
{
ddlSites.Items.Clear();
getSites();
}
But even if the site is reloaded with all the items and I select one the value is null, why is that and what should I do to fix this problem?
Is it necessary to reload the viewstate of usercontrols during postback? I want to know in which case viewstate is set by default.
View 2 RepliesI am creating one of my first Asp.Net tools and I ran in to a small bump. Currently I am doing a postback on a buttonclick which does some server-side calculations. The server-side code then uses those calculations to alter the contents of a div. In IE and Firefox when a postback happens, the div updates as expected. However, in chrome all postbacks do a complete refresh of the entire page. What is causing this and is there a way around this behavior?
Update:
ClientSide I have the following..
<asp:Button ID="Button2" Style="float: right" runat="server"
OnClick="S_ButtonClick" Text="Calculate" />
Which calls a method summarized as so.
protected void S_ButtonClick(object sender, EventArgs e)
{
//Code parsing values from textboxes ect.
//Do Some Calculations
//Output Results
outputDiv.InnerHtml = "<h2>Foo</h2><br/>";
outputDiv.InnerHtml += "Bar: " + calcValue;
}
It is possible that when this postback(if I understand this correctly) happens, that it is still fully reloading in firefox and ie, but it doesn't show it. This effectively masks the postback. However, when I test in chrome, any postback completely blanks the page before reloading the state. Hopefully this clears up exactly what I am asking. Also, my C#/.Net usage might be slightly flawed and I am willing to take comments on such.
I just want to know how to detect a page is refreshed or reloaded apart from Postback. Just clicking the reload button in the browser...
View 1 RepliesI have a webpage with a button. If I click the button and enter the event handler for the click event (so I have actually a postback) I want to force a second postback in this event handler.(Background for this weird seeming request is: I change the theme of the page in the button click event handler. To make this change immediately visible I need to pass the PreInit event of the page again.)At the moment I force a "refresh" of the page by redirecting the page to itself:
[Code]....
But this clears all controls on the page as if I would enter the page the very first time. For instance, a textbox already filled out by the user is emptied. But I want only a postback which does not change any control contents.
I'd like to programmatically force a full page postback to occur after an event is fired by one of the child controls. I can't add any triggers to make this work so it will have to be done via code.
View 2 RepliesI have a login form on the home page of an ASP.NET 3.5 website which for performance reasons needs to be accessed with a standard HTTP connection. Since the normal postback for an ASP.NET page is relative call for the post, it would mean that when the browser posts the values are sent unprotected.
I would like to do one of two things to make this secure:
Force the Postback to be secure to the same page Send the post to a different page using an HTTPS connection
Is there a way to implement option one?
I'm also looking at the Authentication Service, but looking at the URL reference it is using a relative path:
Sys.Services._AuthenticationService.DefaultWebServicePath = '../Authentication_JSON_AppService.axd';
I don't see a way to override this to put in an HTTP path.
I have a user control with a datalist loaded on my web page and also a web form to add another entry to the datalist when the button to submit the new entry I need to reload the user contol to show the new entry
<h1>Admin</h1>
<h2>News</h2>
<asp:label ID="lblSearch" Text="Select News: " runat="server" />
<asp:DropDownList ID="NewsList" runat="server" CssClass="DropDownMenu" />
<asp:Button ID="btnSearch" Text="Search" runat="server" OnClick="btnSearch_Click" />
<br />
<br />
<asp:Label ID="dbErrorMessage" ForeColor="Red" runat="server" />
<asp:Label ID="Successfulmessage" runat="server" />
<br />
<asp:Label ID="lblTitle" runat="server" Text="Title" CssClass="TextBoxLabel" />
<br />
<asp:TextBox ID="txtTitle" runat="server" CssClass="TextBox" />
<br />
<br />
<asp:Label ID="lblNews" runat="server" Text="News" CssClass="TextBoxLabel" />
<br />
<asp:TextBox ID="txtNews" runat="server" TextMode="MultiLine" Width="500px" Rows="10" CssClass="TextBox" />
<br />
<asp:Button ID="btnSubmit" Text="Submit" runat="server" Onclick="btnSubmit_Click" />
<asp:Button ID="btnUpdate" Text="Update" runat="server" OnClick="btnUpdate_Click" />
<asp:Button ID="btnDelete" Text="Delete" runat="server" OnClick="btnDelete_Click" />
<br />
<br />
<uc1:NewsList ID="NewsList1" runat="server" />
<br />
protected void btnSubmit_Click(object sender, EventArgs e)
{
// Define data objects
SqlConnection conn;
SqlCommand comm;
// Read the connection string from Web.Config
string connectionString = ConfigurationManager.ConnectionStrings["platiummindproductions"].ConnectionString;
// Initialise connection
conn = new SqlConnection(connectionString);
// Create Command
comm = new SqlCommand("INSERT INTO News (Title, Date, News) VALUES (@Title, @Date, @News)", conn);
// Add command parameters
comm.Parameters.Add("@Title", System.Data.SqlDbType.NVarChar, 50);
comm.Parameters["@Title"].Value = txtTitle.Text;
comm.Parameters.Add("@Date", System.Data.SqlDbType.DateTime);
comm.Parameters["@Date"].Value = DateTime.Now;
comm.Parameters.Add("@News", System.Data.SqlDbType.NVarChar, 4000);
comm.Parameters["@News"].Value = txtNews.Text;
// Enclose database in try-catch-finally
try
{
// Clear message labels
Successfulmessage.Text = "";
dbErrorMessage.Text = "";
// Open the connection
conn.Open();
// Execute the command
comm.ExecuteNonQuery();
DataBind();
// Display sussessful message
Successfulmessage.Text = "News Updated successfully!";
}
catch
{
// Display error message
dbErrorMessage.Text = "Error updating the News details! Please try again later!";
}
finally
{
// Close the connection
conn.Close();
}
}
I'm having a problem with entering edit mode in Gridview. When I click edit, it shows it in normal mode (labels) even though RowCommand does successfully fire.
But I have to click it AGAIN to get it to show the TextBoxes of 'Edit' mode.
How can I fix this? Is there a way to force a 'postback' on the entire page, or re-render a control? (i'm assuming thats the problem)
Here's the pseudo code:
GridView1_RowCommand(....)
If e.CommandArgument = "EDIT" then
GridView1.EditIndex = 5
End IF
End Function
A click of the 'edit' button returns the gridview with the normal labels. Then when I click it again, the TextBoxes show up.
I think my title says it all. I have a modal dialog showing up and the user can make some changes and then click a 'Save' button. I need that to totally post back the whole page. I just assumed the button would fire off regardless of the jQuery.
View 2 RepliesI found this solution to force full postbacks from within an UpdatePanel
<Triggers>
<asp:PostBackTrigger ControlID="controlID" />
</Triggers>
but my control is actually inside an ItemTemplate nested in a GridView. Therefore when my page loads, it doesn't find that control.
How can I force a full postback from my control (an asp:LinkButton) from within my GridView?
I am using asp.net 3.5 and use master pages for most of the website. I need to make sure that users after they logout are not able to use the back button to see in cache data.
View 4 RepliesI have two checkboxes: cb1 and cb2. They are both hooked up to an onClick event which checks if at least one checkbox is clicked. If this is not the case, it throws an alert and reverts the change. If a legal change was made (e.g. cb2 was checked, followed by cb1 being unchecked), the function calls the server function checkChange() which needs the object and eventargs.
I'm having trouble with the following:
Reverting the change: how can i find out which checkbox was clicked without adding an extra javascript function for the second checkbox? This has to be a scalable solution as more checkboxes may be added later.
How do I call the server function checkChange(). I am aware of "this.Page.GetPostbackEventReference" but I am confused as to the parameters it takes.
Currently the ListView control displays data horizontally when there are two to three columns. How do I get the ListView control to display data from top to bottom if there are two two to three columns?
View 15 Replieswhen updating a decimal field in a GridView all is fine when using e.g. "2.3" ("." to separate the fraction!)
However, when using "2,3" I get e formatstring exception!
I tried "regularExpressionValidator/RequiredFieldvalidator" but did not succeed! Tried also with FormatString like {0:n}.....
Questions:
is this controllable by "Culture / UICulture" in web.config (played with it without success!
How do I best check for correct input i.e. force "." as separator
Can I use the "DataFormatString" property for the appropriate GridView field (like {0:n}) ......
[code]....
I dynamically load user controls from a default page but when a postback fires within the user controls I can’t get the selected user control to reload. Hard to explain so I will try to show you what is going on.
[Code]....
When I enter my name and click the “Answer” button the page reloads back to the original state with no user control loaded. Why is the “Hello.ascx” user control not loaded with “Lable1” populated with the information for the click event from the code behind event?