asp.net-2.0 | 易学教程

How do you manually modify a bound object with a FormView?

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问题 I am using a FormView with an ObjectDataSource. When the save button is clicked, I would like to modify the data bound object before it gets set to the ObjectDataSources Update method. I tried the FormView's Updating event as well as the Object Data Source's Updating event but I can't figure out how to access the data bound object. FormView.DataItem is null in those events. Or in other words, I would like to intercept and modify the DataItem before it gets passed to the ObjectDataSource

ASP.Net Button not raising postback

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问题 I've a simple page in one of our web applications, which has the following markup: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="NewUpload.aspx.cs" Inherits="Mass_Upload.NewUpload" MasterPageFile="~/Master" Title="Document Mass Upload" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <link rel="Stylesheet" type="text/css" href="./../CSS/ScrollingTable.css" /> <script type="text/javascript" src="../Help/HelpPopup.js" /> </asp:Content> <asp:Content ID=

ASP .NET: when UserControls loads?

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问题 Is MasterPage -> Page -> UserControl the loading order of an ASP .NET request? Is there a situation where an UserControl loads before the Page loads ? I have private messages for my users and in every page they will see a message like this "You have 3 unread messages." When users view an unread message I want to change the message to this "You have 2 unread messages." This can be easily done with a Request.Redirect, but I want to avoid this. message 1 -> click on it will goes to MarkAsRead

Can an ASP.NET 2.0 Web site reference WCF Web Services?

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Our company currently has a web site which is deployed in Windows 2000 OS, which means that we could only install .NET 2.0 on that machine. Upgrading the Webserver OS is out of the question, since this web server also hosts other web applications in our country. As also part of our IT's policy, for security reasons the web sites are not allowed to directly access data to our database. That 's why to comply with this restrictions, We have another Server where the Web services is deployed. This "app server" currently has .Net 3.5 SP1 installed, hence WCF Services is possible. My question is if

Code to create CAPTCHA code in ASP.NET?

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问题 I want to create a CAPTCHA similar to http://www.gigbooks.com/getcaptcha.php this one. But its in PHP an anyone provide me the code to create the same in ASP.NET ? I am using ASP.NET 2.0 (C#) Thanks, 回答1: For a programmatic API to reCAPTCHA, start at the recapture home page. If you just want to hide contact emails, take a look at Google's reCAPTCHA mailhide. 来源： https://stackoverflow.com/questions/430615/code-to-create-captcha-code-in-asp-net

how to check a particular asp.net validation control is valid?

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In a web form there are different asp.net validation controls. Is it possible to check a particular validation control is valid ? For example on leaving focus of textbox, first I will check requiredFieldValidatorUserName is valid ? If it is valid then I will check on server using ajax that this user name is not booked already. Edit: Explaination: I want to check validity (that input was valid) of a validation control on client side. Please guide. The best way would be to use a CustomValidator with client side code, as this will display all the error messages, block form submission and also

What is the most efficient way to handle en expired session with ASP.NET 2.0

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On the site we are building. We need to be able to redirect the user to a default page when his session has ended. At first sight we used the Session_End with a Response.Redirect to do this job. Sub Session_End(ByVal sender As Object, ByVal e As EventArgs) Response.Redirect("~/global/exit.aspx") End Sub But it generates a crapload of Response is not available in this context errors. Naturally we don't want to spam our servers error logs. What is the most efficient way to handle session ending with ASP.NET 2.0? We added the following code to the global.asax.cs file: private void IsAuthenticated

ASP.NET 2.0: Specifying an instance of an object for an ObjectDataSource

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I'm using an ObjectDataSource to bind data to a GridView; it works fine except that it always creates a new object to use as a data source. I can do all the setup just fine but I cannot use an instance of an existing object to specify as the "data source" for it. Is it possible to do this? If so, how? If it's not possible, why? EDIT: Here's the gist of what's going on (object types changed): On the first page you are editting the attributes for a dog. One of the attributes is "has puppies" and if it's true, the next page you specify the names of those puppies. What's happening in my case is

Relative path not working when website is deployed

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I have a website that has a relative path to a stylesheet that looks like this "/stylesheets/main.css". Now this works fine when I run the site in Visual Studio. But when I deploy the site to our Windows Server 2003 the path stops working. If I go back into code and change the path from "/stylesheets/main.css" to "stylesheets/main.css", the site works fine on the server. I have another website on a different server that uses the same path style ("/stylesheets/main.css") and stylesheet and works with no problems. I really don't want to change all the paths, and am not even sure if this is a

Can I Include different javascript/css files per Content Page using ASP.NET WebForms Master Pages?

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I have several Content Pages using the same Master Page, that don't all need the same javascript and css files included in the <head> tag. Is it possible to change the contents of the <head> tag from the Content Pages? it is, but I recommend doing it a bit different. I place a content place holder right above the close body tag. Then I populate the required JS scripts per content page. This will allow you to place the scripts at the bottom, but you could also do the same with the placeholder in the header. You can also do so programmatically: HtmlGenericControl js = new HtmlGenericControl(