onclientclick | 易学教程

OnClick vs OnClientClick for an asp:CheckBox?

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问题 Does anyone know why a client-side javascript handler for asp:CheckBox needs to be an OnClick="" attribute rather than an OnClientClick="" attribute, as for asp:Button? For example, this works: <asp:CheckBox runat="server" OnClick="alert(this.checked);" /> and this doesn't (no error): <asp:CheckBox runat="server" OnClientClick="alert(this.checked);" /> but this works: <asp:Button runat="server" OnClientClick="alert('Hi');" /> and this doesn't (compile time error): <asp:Button runat="server"

Why doesn't returning false from OnClientClick cancel the postback

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问题 I have a LinkButton where I use the OnClientClick property to ask the user whether he really wants to perform an action, e.g: <script> function confirmDelete() { return confirm('Do you really want to delete?'); } </script> <asp:LinkButton runat="server" OnClientClick="return confirmDelete()" ... /> This pattern usually works, but on this specific page, it doesn't. No matter whether I click OK or Cancel in the confirm dialog, the postback is executed. Just for completeness (to answer pst's

ASP.NET confirm before executing codebehind

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问题 I have a form where a user can delete a record, and I want a pop-up message where the user has to click okay to confirm the delete. Delete button: <asp:Button ID="btnDelete" runat="server" Text="Delete" UseSubmitBehavior="false" OnClick="btnDelete_Click" OnClientClick="confirmation();" /> Confirmation function: function confirmation() { var answer = confirm("Are you sure you want to delete? This action cannot be undone.") } So right now, clicking the delete button executes the btnDelete_Click

Stopping onclick from firing when onclientclick is false?

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Is it possible to use the onclientclick property of a button to do a clientside check. If the check returns true , then fire the onclick event. If the clientside check returns false , don't fire the onclick event. Is that possible? UPDATE: These 2 work: Stops the form from submitting: OnClientClick="return false;" Allows the form to submit: OnClientClick="return true;" The next 2 do not work: // in js script tag function mycheck() { return false; } // in asp:button tag OnClientClick="return mycheck();" // in js script tag function mycheck() { return true; } // in asp:button tag OnClientClick=

Stopping onclick from firing when onclientclick is false?

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问题 Is it possible to use the onclientclick property of a button to do a clientside check. If the check returns true , then fire the onclick event. If the clientside check returns false , don\'t fire the onclick event. Is that possible? UPDATE: These 2 work: Stops the form from submitting: OnClientClick=\"return false;\" Allows the form to submit: OnClientClick=\"return true;\" The next 2 do not work: // in js script tag function mycheck() { return false; } // in asp:button tag OnClientClick=\

OnclientClick and OnClick is not working at the same time?

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I have a button like the following, <asp:Button ID="pagerLeftButton" runat="server" OnClientClick="disable(this)" onclick="pager_Left_Click" Text="<" /> When I use my button like that, onclick is not firing. When I remove OnClientClick, then onclick is firing. What I need to do is, disable the button during the postback and enable it after the postback ends. Edit: Additional information: I added break point to my firing functions is c# part and I am debugging, they are not firing for sure. Those functions are like protected void pager_Left_Click(object sender, EventArgs e) { //Do smthing. }

OnclientClick and OnClick is not working at the same time?

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问题 I have a button like the following, <asp:Button ID=\"pagerLeftButton\" runat=\"server\" OnClientClick=\"disable(this)\" onclick=\"pager_Left_Click\" Text=\"<\" /> When I use my button like that, onclick is not firing. When I remove OnClientClick, then onclick is firing. What I need to do is, disable the button during the postback and enable it after the postback ends. Edit: Additional information: I added break point to my firing functions is c# part and I am debugging, they are not firing