Using JavaScript if/then/else into ClientScript function

Question

I am not so familiar with JavaScript, for that reason I need your help and advice! I have the following code in my asp button when is clicked. When the confirm box is displayed the user has two choices either to select OK or Cancel. The following code works in both of cases either OK or Cancel.

 protected void cancel_Click(object sender, EventArgs e)
    {
        string url = "../../Default.aspx";
        
        ClientScript.RegisterStartupScript(this.GetType(), "callfunction", "confirm('Data is not saved'); window.location.href = '" + url + "';", true);
    }

However, what I am trying to do is to perform an if/then/else statement using JavaScript inside ClientScript function, and I don't know the correct syntax of that. e.g what I am trying to do

ClientScript.RegisterStartupScript(this.GetType(), "callfunction", "javascript:if(confirm('Data is not saved')== true) return {document.location.href = '../../Default.aspx'}; else {document.location.href = '../../Current.aspx'};", true);

Any advice would be appreciated!

Stefan · Accepted Answer · 2012-11-16 09:51:01Z

1

Try the script before you add it server side, it easier to debug that way.

Here´s two ways to write the if statement;

if (confirm('Data is not saved')) {
 window.location.href = '../../Default.aspx';
} else {
 window.location.href = '../../Current.aspx';
}

or even;

window.location.href = confirm('Data is not saved') ?
    '../../Default.aspx' : '../../Current.aspx';

UPDATE

<asp:Button ID="cancel" runat="server" Text="Cancel" CausesValidation="false"
  onClientClick="window.location.href = confirm('Data is not saved') ? '../../Default.aspx' : '../../Current.aspx';"
/>

Also note that you should rather use window.location than document.location.

edited Nov 16, 2012 at 9:51

answered Nov 16, 2012 at 7:57

Stefan

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5 Comments

mike Over a year ago

I tried to do that but it did not work...whereas the confirm box was displayed properly, when I pressed OK or Cancel nothing was happened(remain at the same page instead of redirection)

mike Over a year ago

<asp:Button ID="cancel" runat="server" Text="Cancel" CausesValidation="false" onClientClick="return checkValidation();"/>

mike Over a year ago

mike Over a year ago

I posted you my button and the script..No redirections with this approach, either external or internal redirection, for that reason I am trying with my post, do you have any advice why is not working? thank you

Stefan Over a year ago

You have tagged your question with javascript-library. What library are you referring to? I updated my answer with the ASP.NET button control.

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