I have the following command button:
<asp:Button Text="Insert Value" UseSubmitBehavior="false" runat="server" OnClientClick="return Confirmation.value('insert');" CommandName="Insert" />
I am using UseSubmitBehavior="false" to prevent ASP.Net page enter key causing post back
I do not want to listen to the enter keyCode via javascript because enter is used to submit non-webform elements not related to the form
Apparently, when using a Command and UseSubmitBehavior="false" then OnClientClick doesnt work. If I turn on submit behavior it works as expected but then hitting enter on the page automatically tries to click the button.
I prefer not to listen for the click event in Jquery or in javascript, and prefer a webform solution. Possible a better way of prevent enter from submitting the form or a way for OnClientClick to work properly with no submit behavior
You may need to use Panel and keep all your form inside Panel Tag and set the DefaultButton value of Panel to Button. Like Below:
<asp:Panel ID="Panel1" runat="server" DefaultButton="Button1">
// other form elements
<asp:Button Text="Insert Value" ID="Button1" runat="server" OnClientClick="return Confirmation.value('insert');" />
</asp:Panel>
Related
I have a form with only a file upload control and 2 gridviews, for each grid view we have an add button and a save button for the whole page:
So the first button for gridview1 works fine but the other 2 buttons are not even displaying the msgbox inside the function, I tried adding CausesValidation=false but that didn't changed anything.
What could be wrong?
<asp:FileUpload ID="fileup" runat="server" />
<asp:Button runat="server" Text=" + Add" ID="btnGrid2"/>
<asp:Button runat="server" Text="Save" ID="btnSave"/>
Change your code from
<asp:Button runat="server" Text="Save" ID="btnSave"/>
To
<asp:Button runat="server" Text="Save" ID="btnSave" onclick="btnSave_Click"/>
That is happening because you've copied whole event from another page and because of that actual event in aspx page is not generated.
Visual Studio gives facility of generating events automatically.
Just Place a control in your page -> Go to Control's Properties -> Navigate to events. -> Find OnClick and duble click there. It will generate your buttonclick event automatically in aspx.vb code behind file.
Or you can simply put a button in your design page and then by clicking on it will also generate buttonclick event automatically.
Hope it helps.
I have a webform with an asp button that when clicked, needs to perform a function in c#. The function does not affect anything on the page so I do not need a refresh of the page.Is there any way to prevent an asp button from doing a postback? I am not familiar at all with JavaScript so I need to perform this function in c#. Surely there is a way. I have researched but nothing works. CausesValidation="false"' does not work. UseSubmitBehavior=false does not work. And neither does setting the OnClientClick to return false. Keep in mind I am not using JavaScript. Anyone know how?
Add a ScriptManager in your Page first,
Then add an update panel which will have all the controls. This will prevent the entire page being posted back.
here goes an example
<asp:ScriptManager ID="MainScriptManager" runat="server" />
<asp:UpdatePanel ID="pnlHelloWorld" runat="server">
<ContentTemplate>
<asp:Label runat="server" ID="lblHelloWorld" Text="Click the button!" />
<asp:Button runat="server" ID="btnHelloWorld" OnClick="btnHelloWorld_Click" Text="Update label!" />
</ContentTemplate>
</asp:UpdatePanel>
If you do not want to monkey with the ScriptManager or the server side stuff, you can always use an HTML control as in:
<input type="button" id="myButton" value="Do Something" onclick="doSomeFunction(); return false;" />
OR
<button id="myButton" onclick="doSomeFunction(); return false;">Do Something</button>
I did discover that attaching the click event to a button element via jQuery will result in a postback (at least that's what happened to me), so I switched to the tried and true input element.
I have put server side validations for each text box using <asp:RequiredFieldValidator/>. I have called ClearFields() method on page load that will clear all fields on the form when the button is clicked. The problem is that when the form gets posted and the fields are cleared, the validation message appears again. How to hide the validation messages on form post back. I am sorry, but its been years I have not coded in aspx and I can't find any solution online.
This is the textbox code:
<asp:TextBox runat="server" CssClass="form-control" placeholder="Your Name *" ID="name"/>
<asp:RequiredFieldValidator runat="server" ControlToValidate="name" ErrorMessage="Name seems empty" CssClass="help-block text-danger"></asp:RequiredFieldValidator>
This is the button code:
<asp:Button runat="server" class="btn btn-xl" Text="Send Message" ID="submit" OnClick="submit_Click" CausesValidation="false"/>
I guess you are getting the validation message due to button used for clearing the fields. Set CausesValidation property of button to false:-
<asp:Button ID="ClearButton" runat="server" CausesValidation="false" Text="Clear" />
Also, please note asp:RequiredFieldValidator works on client side i.e on the browser it is not a server side validation.
Update:
Since you are clearing your fields on click of button, you can clear in submit_Click method itself after sending the email instead of page load. Ideally you should have a separate button to clear the form though.
I have a simple proof of concept web page. It uses one master page and one content page, the default one, default.aspx. I'm doing some client side debugging with alert boxes. I dragged an asp.net button onto the page and set CausesValidation = false and UseSubmitBehavior = false and yet when I click it the page submits.
What am I doing wrong?
Here is a design time code....
<asp:Button ID="Button1" runat="server" Text="Button" UseSubmitBehavior="False" CausesValidation="False" />
Here is Runtime render, wth is it putting in a PostBack?
<input type="button" name="ctl00$ContentPlaceHolder1$Button1" value="Button" onclick="javascript:__doPostBack('ctl00$ContentPlaceHolder1$Button1','')" id="ContentPlaceHolder1_Button1" />
--Update--
Thanks Volkan Paksoy, that worked. For those who suggested HTML buttons, that worked too and that is what I used, but I was just curious why the ASP.NET button wouldn't work. It's something I should know and probably something I knew and forgot. Thanks for the help
If you need to use asp:Button and disable submit you can add OnclientClick function such as:
<asp:Button ID="Button1" runat="server"
CausesValidation="False"
OnClick="Button1_Click"
Text="Button"
UseSubmitBehavior="False"
OnClientClick="return false;" />
This should stop the postback. But you can simply use an input too of course. This is just one way of doing it.
If you want to create a button that does not submit the page/postback to the server, you could create one using raw HTML like so:
<input type="button" />
Is there a good reason why I can't do this
<asp:Button runat="server" ID="Btn1" OnClick='<%# Response.Redirect("wibble.aspx?ID=" + Eval("ID")) %>'/>
I get a compilation error:
The best overloaded method match for 'System.Convert.ToString(object, System.IFormatProvider)' has some invalid arguments
I appreciate I can create a code behind routine to handle the redirect but I would like to be able to create these type of buttons on the fly.
I can use a <asp:HyperLink> and it works fine using the NavigateUrl property, but why can't I do this with a button?
You can use the OnClientClick attribute instead. This will allow you to add Javascript code for the onclick HTML attribute.
<asp:Button runat="server" ID="Btn1" OnClientClick="window.location ='wibble.aspx?ID=<%# Eval("ID")).ToString() %>"/>
You can not do this as this will be rendered as input[type=submit] as html in browser, and for html its not functionality to redirect when you click on button.
If you have such request of having hyperlink in button , ASP.net gives linkbutton control , which will solve your need.
<asp:linkbutton PostBackUrl="~/something.aspx?id=1" runat="server">LinkButton</asp:linkbutton>