I want to save (update) a form from code behind.
I have in the edit form the buttom
<asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update" style="color: #FF0000; font-size: medium; font-weight: 700" Text="Update" />
but in some cases I want to save the form automatically before firing the update button.
How can I do this on code behind?
You can add a Timer to the page to have ASP cause a postback on a fixed interval. You can then attach an event handler to the Tick event and save the form there.
That alone would cause a full page postback on each interval; if you want to have the saving be asynchronous you can wrap the Timer in an UpdatePanel to have it do an async postback. You could also have a label in the UpdatePanel as well, or some other control, to indicate that the form was saved.
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:Timer runat="server" Interval="5000" ID="timer" />
<asp:Label runat="server" ID="lblTimerResponse" />
</ContentTemplate>
</asp:UpdatePanel>
Then in your code behind all you need is:
timer.Tick += (s, _) =>
{
SaveForm();
lblTimerResponse.Text = "Form automatically saved";
};
but in some cases I want to save the form automatically before firing
the update button.
You can use JavaScript interval or timeout functions in order to achieve a timer functionality.
Personally, I would do it using jQuery framework, AJAX technique, interval and serialize functions.
Add the following to the head section in your aspx page (verify that form1 is the ID of your form or change it accordingly):
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script type="text-javascript">
var result = self.setInterval(function(){
var $frm = $('#form1');
$.ajax({
type: $frm.attr('method'),
url: $frm.attr('action'),
data: $frm.serialize(),
success: function (msg) {
alert("Success");
}
});
}, 10000); // Post(update) your form each 10 seconds.
</script>
Related
I want to hide Labels and buttons while working with my code in WPF C# (using Visual Studio)
Is there any way I can do this
You can add the attribute d:IsHidden="true" on these elements.
See this post:
add if not already present xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
put d:IsHidden="true" on element you want to hide at design time only
Aspx page:
___________
Enter Name:
<asp:TextBox ID="txtName" runat="server" />
<br />
<asp:Button Text="Submit" runat="server" OnClick="Submit" /><br />
<br />
<asp:Label ID="lblMessage" ForeColor="Green" Font-Bold="true" Text="Form has been submitted successfully." runat="server" Visible="false" />
Below is the code to make the Label visible on button click.
_________________________________________________________
protected void Submit(object sender, EventArgs e)
{
lblMessage.Visible = true;
ClientScript.RegisterStartupScript(this.GetType(), "alert", "HideLabel();", true);
}
Automatically Hiding Label control after 5 seconds using JavaScript
___________________________________________________________________
Below is the JavaScript function that will hide the Label after 5 seconds. This function gets called using ClientScript RegisterStartupScript method when the Button is clicked.
A variable seconds holds the value which determines after how many seconds the Label will hide. You can set whatever value you need in seconds as per your requirement.
Finally within JavaScript setTimeout function, the Label is hidden by setting its CSS display property to none and the timeout is specified by multiplying the ‘seconds’ variable to 1000 as setTimeout function accepts value in Milliseconds.
<script type="text/javascript">
function HideLabel() {
var seconds = 5;
setTimeout(function () {
document.getElementById("<%=lblMessage.ClientID %>").style.display = "none";
}, seconds * 1000);
};
</script>
I have a formview which launches in editmode and allows the user to select yes or no from a dropdown and hit the 'save' button which is the Formviews Update command:
<asp:FormView ID="FormView1" runat="server" DataSourceID="CustomerEdit">
<ItemTemplate>
hello
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="CustomerNameLabel2" runat="server"
Text='<%# Bind("CustomerName") %>' />
<asp:Label ID="CustID" runat="server" visible="false"
Text='<%# Bind("CustID") %>' />
<br>
<br></br>
Is This Your Customer?
<br>
<br>
<asp:DropDownList ID="DropDownList1" runat="server"
SelectedValue='<%# Bind("IsThisMyCustomer") %>'>
<asp:ListItem Selected="True"></asp:ListItem>
<asp:ListItem>Yes</asp:ListItem>
<asp:ListItem>No</asp:ListItem>
</asp:DropDownList>
<br>
<br>
<asp:Button ID="Button" runat="server" CausesValidation="True"
CommandName="Update" Text="Save" />
</EditItemTemplate>
</asp:FormView>
This button also has JQuery behind it
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">
</script>
<script>
$(document).ready(function () {
$("input[id$='Button']").click(function () {
var div = $("div");
$("img").hide();
div.animate({ height: '300px', opacity: '0.4' }, "slow");
div.animate({ width: '300px', opacity: '0.8' }, "slow", function () {
window.location.href = "MyCustomers.aspx";
});
});
});
</script>
Now when the user hits the button, the Jquery script kicks in, then about halfway through the animation of the jquery script, the SQL update through the FormView Update command kicks in, essentially stopping jquery from doing its stuff and launching the itemtemplate of the formview as per a regular update.
What I want is the SQL update to occur and postback, then the jquery fire straight after.
What's the best approach to doing this
You're mixing client-side and server-side functionality. The order of events you're observing is this:
Load the page
Bind the click event to the element
Click the element (begins the animation)
Reload the page
Bind the click event to the element
Your click event is really only accomplishing one thing, redirecting the user to another page. If the page is being reloaded anyway, then why not do that from server-side code?
Response.Redirect("MyCustomers.aspx");
It doesn't have the animation, but since you're reloading the page anyway then the animation is kind of moot. If you want to have the animation then you probably don't want to reload the page, in which case you'll want to start looking into AJAX for interacting with the server from JavaScript code. (Which can be a pretty big subject, especially when dealing with WebForms controls. It's often better in that case to just "do it the WebForms way" and not try to mess with them.)
In your comment above, you said you tried this...
$(window).load(function () { $(document).ready(function () { ...
That's... not right. Don't just randomly mix and match jQuery code, understand what it is you're doing here. You're binding events (such as ready) inside of an event handler (such as load), which can get pretty strange pretty fast. Separate the event you want to respond to from the code you use to respond to it. For example, consider what you have here:
$("input[id$='Button']").click(function () {
//...
});
This doesn't execute the code inside the function, it binds that function to be executed when the click event happens. The same is true of this structure:
$(document).ready(function () {
$("input[id$='Button']").click(function () {
//...
});
});
This binds a function to be executed when the ready event happens. That function, in turn, binds another function to be executed when the click event happens.
Consider for example what I mentioned in my comment above... If you really want to animate the element and then redirect after the page reloads (which I still contend is a pretty poor UX, to be honest) then you would do this:
$(document).ready(function () {
var div = $("div");
$("img").hide();
div.animate({ height: '300px', opacity: '0.4' }, "slow");
div.animate({ width: '300px', opacity: '0.8' }, "slow", function () {
window.location.href = "MyCustomers.aspx";
});
});
This skips the click event and just sets that code to execute immediately on the ready event. Which means it'll execute when the page loads, basically. Which also means that you don't want to always include this in the page (otherwise you'd never be able to view the page for more than a moment). You'd want to only include it dynamically from the post-back which should cause this redirect.
Ultimately, you need to separate your client-side functionality from your server-side functionality. If you're just redirecting after a form post (which is what you're doing), then redirect from server-side code. If you want the bells and whistles of client-side animations and UX, don't use WebForms post-backs.
I already did search online, and try a few solutions provided, but none of them are working for me.
I have a button within a div. I am displaying the div within a jquery dialog. The button click doesnt work within the jquery dialog.
I have my code below :
aspx
<div id='one'>
<asp:LinkButton ID="ConfigureAlerts" OnClick="btnConfigureAlerts_Click" runat="server">Configure Alerts</asp:LinkButton>
</div>
<div id="ViewModalPopupDiv2">
<asp:UpdatePanel ID="UpdatePanel3" runat="server">
<ContentTemplate>
<asp:Panel ID="Panel2" runat="server" HorizontalAlign="left" ScrollBars="Auto">
<asp:Button ID="btnGetLogs" runat="server" Text="SendAlerts" OnClick="btnSendAlertEmail_Click"/>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
jquery
function ViewModelPopup2() {
$("#ViewModalPopupDiv2").dialog({
scrollable: true,
width: 800,
modal: true
});
}
aspx.cs
protected void btnSendAlertEmail_Click(object sender, EventArgs e)
{
// Code to send email
}
protected void btnConfigureAlerts_Click(object sender, EventArgs e)
{
ScriptManager.RegisterStartupScript
(this, this.GetType(), "callScriptFunction", "ViewModelPopup2();", true);
}
}
Please let me know what I need to do , to trigger the server control events .
I also had this problem with asp.net buttons and jQuery UI Dialog.
To solve it you need to set in your aspnet button the tag UseSubmitBehavior to false.
If UseSubmitBehavior attribute is set to true (this is the default value), the button will use the browser's submit mechanism (and jQuery Dialog UI is manipulating it), if UseSubmitBehavior is set to false, the button will use a client-side script that asp.net framework includes in the page to post to the form.
So your HTML should be like this :
<div id='one'>
<asp:LinkButton ID="ConfigureAlerts" OnClick="btnConfigureAlerts_Click" runat="server">Configure Alerts</asp:LinkButton>
</div>
<div id="ViewModalPopupDiv2">
<asp:UpdatePanel ID="UpdatePanel3" runat="server">
<ContentTemplate>
<asp:Panel ID="Panel2" runat="server" HorizontalAlign="left" ScrollBars="Auto">
<asp:Button ID="btnGetLogs" runat="server" Text="SendAlerts" OnClick="btnSendAlertEmail_Click" UseSubmitBehavior="false" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
More details at http://msdn.microsoft.com/library/system.web.ui.webcontrols.button.usesubmitbehavior.aspx
This is the classic, thanks for moving my dialog jQuery, question.
jQuery UI for some reason moves your dialog code to the bottom of the html markup, outside of your form tag. You need to move the dialog back into the form with some more jQuery:
dlg.parent().appendTo(jQuery('form:first'));
where dlg is your jQuery.UI dialog object.
var dlg = $("#ViewModalPopupDiv2").dialog({
scrollable: true,
width: 800,
modal: true
});
dlg.parent().appendTo(jQuery('form:first'));
That should get things working for you again. Cheers!
If that doesn't work, try doing that in the open event:
open: function(type,data) { $(this).parent().appendTo("form"); }
How would I go about setting a session variable from the click of an ASP:Button before an AutoPostBack event fires.
Here is what I have right now, but I'm not exactly sure I'm doing this right:
<asp:Button ID="CommitBTN" runat="server" PostBackUrl="~/MMR_Home.aspx"
onclick="CommitBTN_Click" UseSubmitBehavior="true"
OnClientClick='<% string temp1 = "true"; Session["ClickedFlag"] = temp1; %>' Text="Commit Changes to Database" />
Would this be the correct way of performing this action or am I going at it completely wrong?
EDIT:
Changed my button tag to this:
<asp:Button ID="CommitBTN" runat="server" PostBackUrl="~/MMR_Home.aspx"
onclick="CommitBTN_Click" OnClientClick="document.getElementById('<%= Hidden.ClientID
%>').value='1'" UseSubmitBehavior="true" Text="Commit Changes to Database" />
I receive this as my error:
Microsoft JScript runtime error: Unable to set value of the property 'value': object is null or undefined
Use this:
Inside aspx file:
<form runat="server">
<asp:Button ID="CommitBTN" runat="server" Text="Button" onclick="CommitBTN_Click" OnClientClick="document.getElementById('HiddenField').value='Ram'"/>
<asp:HiddenField ID="HiddenField" runat="server" />
</form>
Or
<script type="text/javascript">
function setMyHiddenField(myValue) {
document.getElementById('HiddenField').value = myValue;
}
</script>
<form runat="server">
<asp:Button ID="CommitBTN" runat="server" Text="Button" onclick="CommitBTN_Click" OnClientClick="setMyHiddenField('Ram')"/>
<asp:HiddenField ID="HiddenField" runat="server" />
==================================================================
Inside aspx.cs file
protected void CommitBTN_Click(object sender, EventArgs e)
{
Session["ClickedFlag"] = HiddenField.Value;
Response.Write(Session["ClickedFlag"]);
}
It is easy to replase "Ram" with your value. ;)
you can change Ram to temp1 easy:
setMyHiddenField('temp1')
Or you can call this function on your another control events befor CommitBTN pressed
Use a Hidden Field control.
Update the Hidden Field to 1 on Button Client Click.
Update the Session Value in the Page Load' event. The Value will be 1 then update the Session variable and set theHidden Fieldvalue to 0 underneath theSession Variable` Update.
Reason for the Usage of Page Load event is that on clicking the Button as per the page life cycle the page events like PreInit, Init, InitComplete, PreLoad, Load executes before the execution of Button Control.
Page events execution takes place like below..
Preinit
Init
InitComplete
PreLoad
Load
Control Event
Load Complete
Pre Render
Hope this will help you...
I am trying to trigger a postback if a certain condition is true. Initially, a user will click on a button on my form, the server does some work, and in the process of doing that work it assigns a hidden field the value of '1'. When the page reloads after that very first postback, I am trying to use javascript to check the hidden field, and if it is '1' I need the page to postback again so the server side can do some additional processing. The reason for doing it this roundabout way is so that I can create controls on the form from my C# code behind as well as download a file in 1 user interaction. Here is what I have so far:
<script type="text/javascript" language="JavaScript">
function atload() {
var HWInfo = document.getElementById('HiddenHW').value;
if (HWInfo == '1') {
alert("flag has been set");
__doPostBack('<%= hdnHidden.UniqueID %>', '');
}
}
$(document).ready(atload);
</script>
The alert that says the flag has been set correctly fires, but the __doPostBack does not. In my ASPX file, here is the relevant part:
<form id="InventoryForm" runat="server">
<div>
<asp:Label ID="lblClientList" runat="server" Text="Client List"></asp:Label>
<asp:DropDownList ID="comboClientList" runat="server"></asp:DropDownList>
<asp:Label ID="spacer1" runat="server" Text=" "></asp:Label>
<asp:Button ID="btnGenerateHWReport" runat="server" Text="Generate Hardware Inventory Report" />
<asp:Label ID="spacer2" runat="server" Text=" "></asp:Label>
<asp:Button ID="btnGenerateSWReport" runat="server" Text="Generate Software Inventory Report" />
<br />
<br />
<asp:Panel ID="MissingCompPanel" runat="server"></asp:Panel>
<asp:HiddenField ID="HiddenHW" runat="server" Value="0" />
<asp:HiddenField ID="hdnHidden" runat="server" />
</div>
</form>
I can tell the postback never fires, because I have breakpoints in the Page_Load C# codebehind that never get tripped. I have break points on almost every single line of this:
if (!Page.IsPostBack)
{
// Page is not a postback, this is the first visit here
string foo = HiddenHW.Value;
}
else
{
// Page is a postback and not initial load
string foo = HiddenHW.Value;
}
Why is my __doPostBak after the alert not firing, and is there a better way to do this? The end result I want is if my hidden field is '1', then I want my 2nd trip to the server to 1) actually happen and 2) know that the hidden field is '1' and not its default '0'.
Thanks!
how about just clicking the submit button programatically and have it call __doPostBack the way it normally does?
Try invoking the __doPostBack method on the page instead of the hidden control
__doPostBack('__Page', '');
When you get the value of HiddenHW, you're not using the right ID. If you look at the rendered source, the ID of the control is something like ctl00_HiddenHW. To get that ID, you should use HiddenHW.ClientID. I believe __doPostBack also needs the ClientID, not UniqueID.
function atload() {
var HWInfo = document.getElementById('<%= HiddenHW.ClientID %>').value;
if (HWInfo == '1') {
alert("flag has been set");
__doPostBack('<%= hdnHidden.ClientID %>', '');
}
}