How to open new browser window on button click event?

Question

How to open new browser window on button click event in C# ASP.NET?

Please share any example.

I am doing following code. Please let me know where I am going wrong.

btn_Click()
{
    if(condition==true)
    {
        this.Page.ClientScript.RegisterStartupScript(
            this.GetType(),
            "page_index_script2", 
            "openNewWindow();", 
            true
        );
    }
}

And the JavaScript function is

function openNewWindow()
{
    alert('HI');
    window.open('http://www.stackoverflow.com');  
}

When I run the code from javascript function Alert works but new window is not getting opened.

Answer 1

You can use some code like this, you can adjust a height and width as per your need

    protected void button_Click(object sender, EventArgs e)
    {
        // open a pop up window at the center of the page.
        ScriptManager.RegisterStartupScript(this, typeof(string), "OPEN_WINDOW", "var Mleft = (screen.width/2)-(760/2);var Mtop = (screen.height/2)-(700/2);window.open( 'your_page.aspx', null, 'height=700,width=760,status=yes,toolbar=no,scrollbars=yes,menubar=no,location=no,top=\'+Mtop+\', left=\'+Mleft+\'' );", true);
    }

Answer 2

It can be done all on the client-side using the OnClientClick^[MSDN] event handler and window.open^[MDN]:

<asp:Button 
     runat="server" 
     OnClientClick="window.open('http://www.stackoverflow.com'); return false;">
     Open a new window!
</asp:Button>