ASP. NET encountered a problem, "the object cannot be converted from dbnull to another type", record ~ The problem has been solved. Thank you ~

It's really strange that ASP. net in the project can query the processing cost function for a period of time. The local debugging is good, and there is no problem at all, but the transfer to the server has a problem ~ The problem is normal, but the

ASP is used as the Paypal payment Interface

In fact, PayPal can be divided into two parts: International Payment is only for US dollars! China supports RMB collection and payment! This is clear first! Process logic: In fact, you can get a payment interface directly on the PayPal account: As

Various database connection codes in ASP

MS Access Database Connection Use DSN to connect without the user name and password: Set conn = server. Createobject ("ADODB. Connection ")Conn. Open "yourdsnname"%> Connect with DSN and have the user name and password: Set conn = server.

ASP. NET pseudo-static urlrewrite (URL rewriting) Implementation and Configuration

Core tips:On the Internet, you will often see that the address suffixes of many websites use xx. HTML or xx. aspx and other operations are similar to static file identifiers. have you ever wondered whether it is actually a static file generated one

ASP. net xml read, add, modify, and delete operations

C #-XML read, add, modify, and delete operations1. the XML file format is as follows: 1. ReadDataset DS = new dataset ();DS. readxml (server. mappath (@ "projects. xml "));Datatable dt = Ds. Tables [0];Return DT;// The resulting datable is output

Asp.net (C #) to generate a verification code click to refresh

First, create a webpage checkcode. aspx that generates the verification code: The checkcode. aspx. CS code is as follows: Add reference: Using system. IO; Using system. drawing; Using system. Drawing. imaging; Using system. Drawing.

ASP. NET recursively searches for controls with a specified ID

Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->/** // /// Recursively search for the control with the specified ID /// /// parent control (control container) /// ID of the control to be

ASP. NET

The latest project needs to run in the domain, and the information such as the login personnel and account name of the client must be read. If there is no error in local operation, the information that can be obtained on IIS is blank, which is very

ASP. NET concurrent processing

When it comes to concurrency processing, we generally have two aspects: a) server-level concurrency control; B) Program-level concurrency control. Server-level concurrency control: Adjust the maximum number of connections in the server application

Asp.net Web Services

Nowadays, the Internet is constantly evolving. At the beginning of Internet applications, the web pages we browse are static and cannot interact with each other. With the increasing development of technology, it will provide a programmable web site

Asp.net newbie 1

1. Document. getelementbyid BS friends will know document. getelementbyid, but new users will encounter inexplicable errors in some details. For example, 'document. getelementbyid... 'is empty or not an object. In some cases, the ID we need to

Asp.net learning transcript

The ashx text box is auto-incrementing, and the hidden field determines whether it is PostBack. Ashx Div auto-Increment Ashx get, host Because only the input textarea text with the specified name can be submitted to the server. Viewstatedecoder The

Asp.net executes the Stored Procedure

Create procedure is_login (@ ID char (10), @ password char (10) asdeclare @ count int Select count (1) from Admin where a_id = @ ID and a_password = @ PasswordIf (@ count> 0) Select @ count go ==== exec is_login @ ID = 'admin', @ Password = 'admin' =

I have modified/added to my favorite csdn knowledge. (Asp.net JavaScript)

1. How to upload an array in Javascript from the client to the server! 2005-09-13Learn another skill from skytear. --------------------------------------------------Private void button7_click (Object sender, system. eventargs E){String strvalue =

Asp.net learning journey 1

Today, I started to officially learn the key points of Asp.net... every day. I will record them here... 1. built-in objects 1. Request The request object is an instance of the httprequest class. common attributes are as follows: Appactionpath:

Advantages of Asp.net over ASP

· The separation of the user interface and the back-end logic code is used to protect the source code. This is different from ASP. Although the COM component can be used in ASP to achieve the same functions. the original intention of the net

ASP. NET data binding expression

1. Data Binding expression '/> '> '> String variable bound to the background code (must be of the Public type)1) Background codePublic string name = "Lonely sandcontinent ";2) Front-end HTML code name: Bind to method:Public String getuserphoto

Use ASP. NET to generate Web Images dynamically

Generally, the handler extension is ashx, which implements the ihttphandler interface and can respond to HTTP requests. We can use a general processing program to dynamically generate Web images. Using system;Using system. Web;Using system. drawing;

Ckeditor3.0 uploads file configuration in the Asp.net environment and integrates ckfinder

FCKeditor is a WYSIWYG text editor dedicated to the use of open source code on the web page. It is lightweight and can be used without complicated installation steps. It can be used on multiple platforms, such as ASP, Asp.net, PHP, and JSP, and

Configure database connection in Web. config under Asp.net

1. Web. config can use Write connection conditions or add *. MDF files Providername = "system. Data. sqlclient"Connectionstring = "Server = myserver; database = products; uid = ; Pwd = "/> Providername = "system. Data. sqlclient"Connectionstring = "

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