重定向到新选项卡中的页面时，请避免使用弹出窗口阻止程序

Question

So, I have an a application that needs a report to be exported in PDF. And on button click the generated pdf should open in a new tab for the user to view the contents before downloading.

My problem is opening the page in a new tab gets a pop-up blocker warning, I already tried the following:

string url = "/Page2.aspx?id="+id+;

Response.Write("<script>");
Response.Write("window.open('"+url+"','_newtab')");
Response.Write("</script>");

.......

Page.ClientScript.RegisterStartupScript(this.GetType(),"OpenWindow","window.open('"+url+"','_newtab');",true);

...

ScriptManager.RegisterStartupScript(this, this.GetType(), "NewTab", "window.open('" +url+ "');", true);

and still no progress. The redirecting should be done in the server side since I've got to get some data and passed it together with the link.

Answer 1

Usually a browser will block a popup unless the popup is initiated by the user.

If a window opens directly as a result of an onclick it will generally open okay. If the button click indirectly opens the window, it is more likely to be blocked. So your injecting a script tag etc. is likely to be blocked as a webpage being spammy (no-one wants unsolicited popups to appear when they browse).

Putting the window.open directly into the onclick event is the most likely solution to work.

Ultimately however you cannot control the behaviour of the browser though so it may not be possible to do what you want.

Changing the button into a styled hyperlink would work (with a target of _blank or similar). It is not possible to tell a browser to open in a new tab vs a new window.