页面重新加载后从 JS 的按钮单击仅有效并不一致

Question

I have an ASP.Net web app and a part I'm working on is made up three pages:

Main Page, Search User Page and Edit User Page.

The workflow is as follows:

• Login and go to the Main Page. (Works Fine!)
• Go to Search User Page and search for users based on some criteria. (Works Fine!)
• Click on a user on the search result table and go to the Edit User Page with the user info populated. (Works Fine!)
• Press a "Save and Go Back" button and go back to the search results. The expected behavior is for the search page to reload the search results (and hence if the user attributes are changed in a way that they do not meet the search criteria they are not displayed. (This works Funky!)

This is how the logic works:

In EditUserInfo.aspx.cs I have:

 public partial class EditUserInfo: basePage{

    protected void Page_Load(object sender, EventArgs e) {

    }

    protected void btnSaveAndGoBack_Click(object sender, EventArgs e) {
        //Save/Update User Data
        Session["SearchAfterLoad"] = true;
        ClientScript.RegisterStartupScript("string".GetType(), "goBack", "<script type=\"\"text/javascript\"\" language=\"\"javascript\"\">window.history.go(-2);</script>");
    }

In SearchUsersPage.aspx.cs I have:

 public partial class SearchUsersPage: basePage{

    public string SearchAfterLoad{
        get {
            if (Session["SearchAfterLoad"] != null) { return Session["SearchAfterLoad"].ToString();}
            else { return String.Empty; }
            }
        }
    }

    protected void Page_Load(object sender, EventArgs e) {

    }
    protected void btnSearch_Click(object sender, EventArgs e) {
         /*all the logic to use the UI elements to 
           search and populate the users in a table*/
         Session["SearchAfterLoad"] = false;
    }

in SearchUsersPage.aspx I have:

<script type="text/javascript">
$(document).ready(function () {

    var clickButton = document.getElementById("<%= btnSearch.ClientID %>");
    if ("<%=SearchAfterLoad%>" == "True") {
        clickButton.click();
    }
});
</script>

My issue is: When debugging through Visual Studio (2019, 16.4.0), the logic works perfectly. However! When I open the browser and navigate to my localhost (running on local iis) to test this, it will NOT click that search button and the search results do not get updated.

Other observations: This works fine on my colleague's PC with the same windows and the same VS fine no matter if we are debugging or just visiting the localhost. However it does not run when deployed to our test server.

It seems the first time we navigate to the search page, the if statement in the document.ready() function translates to:

if ("" == "True")

and never gets updated/re-rendered to if("True" == "True") when we go back to that page from the edit user page.

PS Session["SearchAfterLoad"] is preserved and not lost when I move back and forth between the pages (but to be honest I have only verified it when in debug mode)

Things That I have tried:

• In the btnSaveAndGoBack_Click() function called the URL directly by putting it into Response.Redirect() or by assigning it to window.location.href but then the search page is loaded fresh with no search criteria populated in its UI (just like visiting it the first time ever)

• Play with SessionStateServer and ASP.Net Session Manager, These dont have any effect.

---

Looking forward:

• Any good hint as to what the problem could be. Or,

• Or get the iis/ or whoever in charge to rebuild that page when we go back to it so I get my if("True" == "True") .

• For all other fool-proof ways to trigger that button click. Or,

• Any alternate way of going back and forth between the pages that saves me all the headache!

Answer 1

我的代码中的问题是在分配导致会话变量重置的会话变量后立即调用返回。