postback

Postback issue in ASP.NET

由 与世无争的帅哥 提交于 2019-12-08 00:12:24
问题 I have an asp.net label control with its Visible property set to false. In the code-behind I'm setting its visibility to true/false based on whether the user has logged in or not. A weird behavior is that on postbacks, the code-behind executes and sets the value of the label's visibility to whatever, and then the markup executes and sets the label's visibility to false. On non-postback requests, the status set by the code-behind is not overwritten. Pardon my ignorance, but am I missing

Not allow resubmit of page

由 前提是你 提交于 2019-12-07 22:53:45
问题 I have an ASP.NET 4.0 web form. There is a textbox I want users to submit and check. If it's correct, I blank out the textbox and don't want users to be able to resubmit that data. In IE8, users can hit back (get a resubmit warning) and if they refresh, it will resubmit the data from that text box. I've tried setting the value to null and disabling viewstate for the textbox. How do I stop resubmit? 回答1: You can implement the Post Redirect Get pattern as detailed here on Wikipedia to remove

Twice postback in ASP.NET

由 試著忘記壹切 提交于 2019-12-07 22:43:29
My page is fully postback twice. I am using master page with AJAX. The structure of master page is as follows. +---------------------------------------------+ | Web User Control with AJAX Tab Control | +---------------------------------------------+ | | | | | Col1 | ContentPlaceHolder | Col3 | | | | | | | | | +---------------------------------------------+ The web user control contains the AJAX Tab Container with AutoPostback on. I have created several ASPX pages using this masterpage. The content place holder also gets a web user control depending upon page. Whenever I jump on a page by

ASP.NET Click() event doesn't fire on second postback

由 点点圈 提交于 2019-12-07 17:04:32
问题 I have a ASP.NET web form. The first time I submit the form, the SubmitButton_Click event is raised. The form is returned to the browser either with validation errors or with the option to submit the form again with new values. When the form is sumbitted again, the SubmitButton_Click event never fires. Page_Load fires, but not the button. Does anyone know why I would be seeing this behavior on the server side? (I am using jQuery and the validation control client-side but I don't think it is

Postback problem when using URL Rewrite and 404.aspx

由 被刻印的时光 ゝ 提交于 2019-12-07 16:36:27
问题 I'm using URL rewrite on my site to get URLs like: http://mysite.com/users/john instead of http://mysite.com/index.aspx?user=john To achive this extensionless rewrite with IIS6 and no access to the hosting-server I use the "404-approach". When a request that the server can't find, the mapped 404-page is executed, since this is a aspx-page the rewrite can be performed (I can setup the 404-mapping using the controlpanel on the hosting-service). This is the code in Global.asax: protected void

Prevent postback on Enter in a asp.net inputfield

由 自作多情 提交于 2019-12-07 15:44:33
问题 I have a problem with the key Enter in javascript and asp.net I have a control like this with a textchanged event which does a find but I want to control it when the user does enter <asp:TextBox ID="TextBox1" runat="server" onkeyup="EnterEvent(event)" AutoPostBack="true" OnTextChanged="TextBox1_TextChanged" /> That's why I created this javascript function which works very well. Because it avoids the Enter postback at any character input function EnterEvent(e) { var keycode = (e.keyCode ? e

Update Javascript after Async Post Back in ASP.NET

由 ε祈祈猫儿з 提交于 2019-12-07 10:20:23
问题 I have the following code on my website: <asp:ScriptManager ID="ScriptManager1" runat="server" /> <asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Conditional"> <Triggers> <asp:AsyncPostBackTrigger controlid="myButton_btn" eventname="Click" /> </Triggers> <ContentTemplate> <script> function pageLoad(){ window.alert("<%=Session("myVariable")%>"); } } </script> </ContentTemplate> </asp:UpdatePanel> <asp:Button ID="myButton_btn" Text="Prev Month" runat="server"></asp:Button> The

AjaxFileUpload postback false

由 蓝咒 提交于 2019-12-07 08:27:14
问题 i am using AjaxFileUpload in ASP.NET 4.0 website. The problem is that when i upload a file its UploadComplete fires which causes a postback to page. on every postback caused by AjaxFileUpload the Ispostback property is False which should be True . What is the reason. I checked it in the updatePanel and without it. It has no affect at it. Here is the <ajax:AjaxFileUpload ID="AjaxFileUpload1" ContextKeys="fred" AllowedFileTypes="jpg,jpeg,png,gif" MaximumNumberOfFiles="3" runat="server"

Reloading page through javascript: avoid the “Postback” warning

由 故事扮演 提交于 2019-12-07 07:13:19
问题 I'm triggering a page reload through javascript, using the following: window.location.reload(true); However, in some cases (of previous postback), the browser is giving me the following warning "To Display the webpage again, the web browser needs to resend the information you've previously submitted...". Is there any way of avoing this message and just doing the postback anyway, because this might be confusing for the users? If I need to reload the page by another means, so be it. 回答1: I don

A secure implementation of Page.IsPostBack?

由 自古美人都是妖i 提交于 2019-12-07 06:30:45
问题 Following my previous question as to whether ASP.net's default Page.IsPostBack implementation is secure (it's not; it can be faked... the HTTP verb doesn't even have to be POST!), I was thinking; surely there must be a better way to implement it? Can we come up with a Page.IsPostBack implementation which, when it is true, is almost guaranteed to indicate that the page is an actual ASP.net postback? This is important if one wants to do security checking only once (like whether some content is
订阅 postback