I am trying to access a method in my code behind called "Button1_Click" using Javascript, I think there is something wrong in my code below because currently I have to click twice in order for the method to trigger, one click doesn't trigger the method.
My Test Code:
// Javascript
<script type="text/javascript">
function CallMe() { document.getElementById('<%= ButtonHidden.ClientID %>').click(); }
</script>
// Markup
<asp:Button ID="ButtonVisible" runat="server" Text="Test Button"
OnClientClick="CallMe();"/>
<asp:Button ID="Button1" runat="server" style="display:none;" Text="Click"
OnClick="Button1_Click"/>
// Code Behind Method
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("http://google.com");
}
Am I missing something?
You could use the OnClientClick property of the Button:
<asp:button id="Button1"
text="Test Button"
onclientclick="CallMe()"
runat="server" onclick="Button1_Click" />
Then you don't need another (hidden) button.
Your CallMe() method should then return either true (if everything is OK) or false (to cancel the postback).
Instead of using javascript why not simply assign the same server click handler for both buttons:
<asp:Button
ID="ButtonVisible"
runat="server"
Text="Test Button"
OnClick="Button1_Click" />
<asp:Button
ID="Button1"
runat="server"
style="display:none;"
Text="Click"
OnClick="Button1_Click" />
UPDATE:
A better solution would be to have your javascript function return a boolean value depending on whether some conditions are met which will execute the server handler:
<script type="text/javascript">
function CallMe() {
if (some condition) {
return true; // allow the server to be called
}
return false;
}
</script>
and then use both OnClick and OnClientClick on the button:
<asp:Button
ID="ButtonVisible"
runat="server"
Text="Test Button"
OnClientClick="return CallMe();"
OnClick="Button1_Click" />
Related
How do I execute javascript from code behind where the button inside an updatepanel
I want to open a div inside a fancybox and I am opening it from code behind
and It is working
but I want to put the button inside an updatepanel
but after that the javascript is not triggering
maybe because I am putting it inside document.ready
what else we can put the trigger in to work
html
<a id="various" runat="server" href="#inline" style="visibility: hidden"></a>
<asp:Literal ID="fancyLtr" runat="server"></asp:Literal>
<asp:UpdatePanel ID="UpdatePanel6" runat="server">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</ContentTemplate>
</asp:UpdatePanel>
javascript
$(document).ready(function () {
$("#ContentPlaceHolder1_various").fancybox();
});
code behind
protected void Button1_Click(object sender, EventArgs e)
{
various.Attributes["href"] = "#inline";
fancyLtr.Text = "<script>jQuery(document).ready(function() {$(\"#ContentPlaceHolder1_various\").trigger('click');});</script>";
}
Thanks in advanced
I have a button that opens a modal popup, but before I open the modal popup, I want my "OnClick" event for the "btnSaveAndScheduleTask" button to fire. I am using ASP.NET 4.5 / Visual Studio 2012 / HTML5 / CSS3
My aspx (snipet):
How do I get the codebehind OnClick event for my "btnSaveAndScheduleTask" button to fire? If the entire code would help figure it out, let me know, but I'm probably missing something simple (bear in mind that I want to be able to view all my asp controls from the C# codebehind):
<asp:Button ID="btnSaveAndScheduleTask" runat="server" CausesValidation="true"
OnClientClick="javascript:return validatePage();" OnClick="btnSaveAndScheduleTask_Click"
Font-Bold="true" Text="Schedule Task" />
<ajaxToolkit:ModalPopupExtender ID="mpeScheduleTask" runat="server" ValidateRequestMode="Enabled"
BackgroundCssClass="modalBackground" CancelControlID="btnCancSchedule"
PopupControlID="pnlScheduleTask" TargetControlID="btnSaveAndScheduleTask" DropShadow="true" >
</ajaxToolkit:ModalPopupExtender>
<div id="divScheduleTask" runat="server">
<asp:Panel ID="pnlScheduleTask" Height="310" Width="690" BackColor="#ece4e1" ForeColor="Black" runat="server" >
<asp:UpdatePanel runat="server" ID="udpScheduleTask" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblTaskSch" Visible="false" Font-Bold="true" Text="Task Scheduling: " runat="server" />
<asp:Button ID="btnSaveSchedule" runat="server" OnClick="btnSaveSchedule_Click" Text="Save Schedule" />
</div><asp:Button ID="btnCancSchedule" runat="server" Text="Canc" />
</ContentTemplate></asp:UpdatePanel></asp:Panel></div>
I've left out most of the panel as it's huge... here is my validatePage() Javascript:
<script type="text/javascript">
function validatePage() {
//Executes all the validation controls associated with group1 validaiton Group1.
var flag = window.Page_ClientValidate('vTask');
if (flag)
//Executes all the validation controls which are not associated with any validation group.
flag = window.Page_ClientValidate();
if (!Page_IsValid) {
$find('mpeScheduleTask').hide();
}
return flag;
}
</script>
My aspx.cs code behind:
protected void btnSaveAndScheduleTask_Click(object sender, EventArgs e)
{
//do stuff
}
Remove TargetControlID="btnSaveAndScheduleTask" , give other dummy control's ID
So when button clicks, click will take user to server , in code behind you need to manually open popup.
This is given here...!!!!
http://www.codeproject.com/Tips/215040/ModalPopupExtender-from-Server-Side-Code
I would put the javascript to be called in the behind code in your button click..
protected void btnSaveAndScheduleTask_Click(object sender, EventArgs e)
{
// do stuff.
Page.ClientScript.RegisterStartupScript(this.GetType(), "Call my function", "validatePage();", true);
}
this is how I do most of mine. Hope this helps.
And your ASP should look like..
<asp:Button ID="btnSaveAndScheduleTask" runat="server" CausesValidation="true" OnClick="btnSaveAndScheduleTask_Click" Font-Bold="true" Text="Schedule Task" />
I have an AspxCallback control that is supposed to update textbox text when i click the Button. But nothing happens when I click the button.
Here is my sample code for the test:
C#:
protected void callback_Callback(object source, DevExpress.Web.ASPxCallback.CallbackEventArgs e)
{
txtTest.Text = "Text for Textbox";
}
ASP.NET:
<asp:Button ID="btnTest" runat="server" Text="CLICK" OnClientClick="callback.PerformCallback(); return false;" />
<br />
<asp:TextBox ID="txtTest" runat="server" Width="200" Height="25"></asp:TextBox>
<dx:ASPxCallback ID="callback" runat="server" ClientInstanceName="callback"
oncallback="callback_Callback">
</dx:ASPxCallback>
"Your problem resides on the fact that the TextBox is not inside a CallBack Panel.
The way a callback works is like an ajax call that can update only the Ajax enabled so to say controls. Those controls can be put inside a callback panel for this exact reason.
<dxcp:ASPxCallbackPanel ID="ASPxCallbackPanel1" runat="server" Width="223px" BackColor="#FFFFC0" ClientInstanceName="callbackPanel1" Height="78px" oncallback="callback_Callback">
<PanelCollection>
<dxp:panelcontent runat="server">
<asp:Button ID="btnTest" runat="server" Text="CLICK"
OnClientClick="callbackPanel1.PerformCallback(); return false;" />
<br />
<asp:TextBox ID="txtTest" runat="server" Width="200" Height="25"></asp:TextBox>
</dxp:panelcontent>
</PanelCollection>
</dxcp:ASPxCallbackPanel>
I think this will solve your problem. Now your code will update the TextBox properly.
<div>
<asp:Label ID="lblClientId" runat="server" CssClass="label" meta:resourcekey="lblClientIdResource" />
<asp:TextBox ID="tbClientId" runat="server" style="width:150px; "/>
<asp:Button ID="btnClientId" runat="server" style="width:50px;" meta:resourcekey="btnClientIdResource" />
<asp:CustomValidator ID="rfvClientId" runat="server" ValidationGroup="ClientId" meta:resourcekey="rfvClientIdResource" ControlToValidate="tbClientId" ClientValidationFunction="BtnClickClientId" style="position:absolute;" ValidateEmptyText="True" ><asp:Image ID="Image2" ImageUrl="caution_20.png" runat="server" /></asp:CustomValidator>
</div>
<script type="text/javascript">
function BtnClickClientId(session, args) {
ButtonClick(session, args, "<%= tbClientId.ClientID %>", "<%= lblClientId.ClientID %>");
}
window.onload = function () {
document.getElementById('<%= tbClientId.ClientID%>').focus();
};
</script>
<asp:ValidationSummary ID="ClientIdValidationSummary" runat="server" BackColor="LightGray" DisplayMode="BulletList" CssClass="validationSummary" EnableClientScript="true" HeaderText='<%$ Resources:GlobalResource, ValidationSummaryResource %>'/>
So this ButtonClick() method is working and has been tested independently. The problem is that when i enter nothing into the text box and click the button, the validator works as expected and appears on the screen. Then it disappears. It is also never shown in the page validation summary. How do I get this to work?
I have tried to also set a required field validator on this text box and it seems to work with that but I do not want to use two validators.
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="tbClientId" ErrorMessage="RequiredFieldValidator" style="position:absolute;"><asp:Image ID="Image2" ImageUrl="caution_20.png" runat="server" /></asp:RequiredFieldValidator>
<asp:CustomValidator ID="rfvClientId" runat="server" ValidationGroup="ClientId" meta:resourcekey="rfvClientIdResource" ControlToValidate="tbClientId" ClientValidationFunction="BtnClickClientId" style="position:absolute;" ValidateEmptyText="True" ></asp:CustomValidator>
This code works but I should not have to use 2 validators.
You need to set the "arg.IsValid" to "true" or "false" in the javascript function based on your requirement (i.e. to "true" when you think the validation is successful and false otherwise). Also, in the code behind file, it is always advisable to check for "Page.IsValid" property inside the click event handler of the button. So, in the javascript add this.
arg.IsValid = false;
and in code behind
protected void button_click(..)
{
if (Page.IsValid)
{
// Your code, if any exists
}
}
Hope this helps!!
I'm using jqueryui dialog function to display my registration form. I have no problem with opening the dialog and displaying register.aspx file in the div. However I have a register button which I would like to use to save the form data into the database. But when I click to that button, it closes the dialog box and redirects the page to the register.aspx. I tried to disable usesubmitbehavior but that didn't help it completely blocks the function of the button.
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" UseSubmitBehavior="False" />
protected void Button1_Click(object sender, EventArgs e)
{
firstName.Disabled = true; // this will be replaced for db data entry. It was just to see if the function is working or not.
}
Use OnClientClick to prevent the default behaviour of form submission upon click. If you do this you will need perform an ajax request to your server yourself.
<asp:Button ID="Button1" OnClientClick="handleRegistrationClientSide(); return false;" runat="server" Text="Button" UseSubmitBehavior="False" />
Otherwise wrap your dialog's inner content in an update panel, and trigger it on the button to cause an async postback.
<div id="myDialog">
<asp:UpdatePanel runat="server">
<ContentTemplate>
...
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
</div>