如何根据登录成功在新窗口/选项卡或同一窗口/选项卡中打开页面？

Question

I have Login page wich is IFrame. If user successfuly logs in i want to open new page with his personal content, and if not I want error message displayed inside same iFrame.

This is my code:

<form class="register-form" runat="server" id='form1' target="_blank">
      <div class="input username">
        <asp:TextBox ID="tbUsername" runat="server" type="text" value="Username"></asp:TextBox>
      </div>
        <div class="input password">
          <asp:TextBox ID="tbPassword" runat="server" value="Password" type="text"></asp:TextBox>
        </div>
      <div class="submit">
        <asp:Button runat="server" ID="btnSignIn" type="button" OnClick="btnSignIn_Click">
        </asp:Button>
      </div>
</form>

As you can see i initially set forms target attribute to "_blank", and plan to change it dynamically.

This is my onclick event in code behind:

protected void btnSignIn_Click(object sender, EventArgs e)
    {
        if (Membership.Providers["CmsMembershipProvider"].ValidateUser(tbUsername.Text, tbPassword.Text))
        {
            Session["Username"] = tbUsername.Text.ToString();
            FormsAuthentication.SetAuthCookie(tbUsername.Text, true);         
            Response.Redirect("../Pages/MyProjects.aspx");
        }
        else {
            btnSignIn.OnClientClick = "openInSameWindow()";
            Msg.Text = "Login failed. Please check your user name and password and try again.";
        }
    }

and this is simple js function:

    <script type="text/javascript">

        function openInSameWindow() {
            var myForm = document.getElementById('form1');
            myForm.target = '_self';
        }
</script>

Page always opens in new tab/window. I figured out that form already opens in new page before i set target to "_self" from code behind.

What is the best solution for this problem?

Answer 1

Page always opens in new tab/window. I figured out that form already opens in new page before i set target to "_self" from code behind.

You are right. The ASP.net code gets executed AFTER target="_blank" is used for form. So your setting of target="_self" is wrong.

One solution for the problem you have is to use POPUP window to show the "../Pages/MyProjects.aspx" page.

Otherwise, I would prefer it if you can show "../Pages/MyProjects.aspx" in same window outside IFRAME. Otherwise keep the user in iframe showing appropriate message.

For first approach you will have to open the popup when user submits the form ie form.onsubmit handler. And on successful login set the location of POPUP to "Pages/MyProjects.aspx" otherwise close the POPUP. Ofcourse don't set target="_blank"

For second approach also don't set target (ie it should be _self) and on successful login set location like following.

window.top.location = "Pages/MyProjects.aspx"

such that your earlier function becomes

function openInSameWindow() {
  window.top.location = 'Pages/MyProjects.aspx';
}

when there are errors, they will be displayed in iframe only.