删除由ClientScript.RegisterStartupScript添加的脚本 [英] Removing scripts added by ClientScript.RegisterStartupScript

问题描述

在应用程序的登录控件中，如果登录失败，我将显示一个对话框窗口.通过这种方式:

In my application's login control, I am showing a dialog window if the login failed. In this way:

protected void EMSLogin_Authenticate(object sender, AuthenticateEventArgs e) {
    log.Info("=============INSIDE EMSLogin_Authenticate======");
    RadTextBox UserName = EMSLogin.FindControl("UserName") as RadTextBox;
    RadTextBox Password = EMSLogin.FindControl("Password") as RadTextBox;

    if (Membership.ValidateUser(UserName.Text, Password.Text)) {
        FormsAuthentication.RedirectFromLoginPage(UserName.Text, false);
    } else {
        ClientScript.RegisterStartupScript(typeof(ScriptManager), "CallShowDialog", "showDialog();", true);         
    }
}

JavaScript是:

The JavaScript is:

function showDialog() {
    $(document).ready(function () {
        $(".jym").dialog("open");
    });
}

现在，如果登录失败，则显示对话框.但是问题是如果刷新浏览器窗口，一次登录失败后，由于在页面中写入了 $(.jym").dialog("open")，对话框再次打开.然后我尝试了

Now if the login failed the dialog is showing. But The problem is if I refresh the browser window, after one login failed, the dialog again opened, since the $(".jym").dialog("open") is written in the page. Then I have tried

protected void Page_Unload(object sender, EventArgs e) {        
    log.Info("=============INSIDE Page_Unload======");
    ClientScript.RegisterStartupScript(typeof(ScriptManager), "CallShowDialog", "", true);
}

但是没有运气.

有什么办法可以解决这个问题?

Is there any way to solve this problem?

如果我使用 ClientScript.RegisterClientScriptBlock()无效，则表示对话框未在错误时打开.

If I use ClientScript.RegisterClientScriptBlock() this not working, I mean the dialog is not opening on error.

推荐答案

尝试调用该函数:

ClientScript.RegisterStartupScript(typeof(ScriptManager), "CallShowDialog", "", true);

...在Page_Load事件处理程序中.

...in the Page_Load event handler.

Page_Load在按钮单击事件处理程序之前发生.您可以通过添加以下代码并在调试/输出"窗口中查找来验证这一点:

Page_Load occurs before the button click event handler. You can verify this by adding the following code and looking in the debug/output window:

protected void Page_Load(object sender, EventArgs e)
{
    System.Diagnostics.Debug.WriteLine("Page_Load");   
}

protected void Button1_Click(object sender, EventArgs e)
{
    System.Diagnostics.Debug.WriteLine("Button1_Click");      
}

因此，擦除Page_Load事件处理程序中的脚本应清除以前加载的所有脚本.

So erasing the script in the Page_Load event handler should clear any previous script that was loaded.

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