Implementation of dynamic query conditions for asp.net Web pages-practical skills

Scene Recently, there is a need to insert various types of data into the MongoDB, which is the database that records the business log. Because the business object types are different, the data format of the insert is completely different. In

Asp. NET Design network hard disk upload file Implementation code _ Practical skills

1. Interface arrangementThis part of the functionality involved in the main control two: one is (ID) WebFile file field control, to browse the upload files path, the other is (ID) for the Btnupload upload button, click it to complete the file upload.

Proficient in asp.net pop-up window technology _ practical skills

The paper also discusses the various filtering behaviors of the pop-up windows and the corresponding countermeasures of using pop-up windows in common use of nonstandard IE browsers, in order to give a general scheme of using pop-up windows. As

asp.net Generate verification code (pure Chinese) _ Practical Tips

Copy Code code as follows: Using System; Using System.Data; Using System.Configuration; Using System.Web; Using System.Web.Security; Using System.Web.UI; Using System.Web.UI.WebControls; Using System.Web.UI.WebControls.WebParts; Using

Htmlhelper_ practical skills of ASP.net picture verification code

A picture verification code HtmlHelper, the original calling code is as follows: Copy Code code as follows: After encapsulation into HtmlHelper: @Html. Validatecode () Use the following steps: 1. Build a Verification Code

asp.net backgroundworker download files in the background _ practical tips

Example: The following code example demonstrates how to use the BackgroundWorker component to load an XML file from a URL. When the user clicks the Download button, the Click event handler invokes the RunWorkerAsync method of the BackgroundWorker

asp.net null in a little bit of a trick to read from the database _ Practical Tips

Its function is very simple, that is, first look in the database as the name of the field, and then to judge, if its value is empty, then the value of number plus 1. For example, the addition of black is what we need to pay attention to.

Implementation example of Web instant application with variable length connection under ASP.net and Reverseajax demonstration Introduction _ Practical Skills

Reverseajax Reverse Ajax is a Web implementation pattern designed to transfer logical control to the server What is the transfer of control rights Traditional Ajax calls are typically triggered by client behavior, such as obtaining zone data,

asp.net MVC3 's pseudo-Static implementation code _ practical skills

Now begin to study the first step, how to define your own routing rules to achieve pseudo static functional requirements. The basic principle of realization of the following diagram: First, about namespaces. The function of routing is to make

asp.net Verification Control Analysis _ practical skills

①, data Format validation control (RegularExpressionValidator) Copy Code code as follows: A pattern match is made to the control you want to validate by customizing the regular expression. Take the previous piece of code for

Asp. NET performance optimization Local cache analysis _ Practical skills

In the Web site development process, often encountered a kind of demand scenario is: 1: The page contains hot news, hot news parts need to update 10 minutes, and the other parts of the entire page will not change within 1 days; 2: The first page

asp.net dynamically loads user-defined controls and translates them into HTML code _ practical Tips

If the page simply use JS to create, to write a large number of code, and not intuitive. In asp.net, we can actually create user-defined controls that return user-defined HTML code through AJAX requests. Copy Code code as follows: public

How to break through file-dependent caching in asp.net development--practical skills

You can use Session,application to cache data in a Web project, or you can cache it by using cache. Today we are particularly concerned with cache caching. The cache is located under the namespace System.Web.Caching namespace, and what we see here

asp.net to generate static pages and pagination code _ Practical Tips

1, static template page template.html, mainly defines a number of special characters, used to be replaced. Copy Code code as follows: title Title Browse time Content Pager View more

asp.net under the aspose.words for. NET dynamically generate pictures or watermarks in Word documents-practical tips

1. Overview Generating Word documents in your project is a common feature that is typically generated in plain text or more lists, makes it easier for customers to print, and needs to be built into Word documents, such as product pictures. This

asp.net file Download Function code collation _ Practical Skills

Copy Code code as follows: public void Filedownloaddel (string fullfilename) { System.IO.Stream iStream = null; Buffer to read 10K bytes in chunk: byte[] buffer = new byte[10000]; Length of the file: int length; Total bytes to read:

ASP.net 2.0 can also use the JSON method _ practical Tips

All the code is as follows. Copy Code code as follows: JSON parsing class public static Class JsonConvert { #region Global Variables private static Jsonobject _json = new Jsonobject ();//Registers private static readonly

Asp. NET caching method Analysis and practice example _ practical skills

Add caching support to the data tier, business logic tier, UI, or output layer. Memory is now very cheap-therefore, a great performance improvement can be achieved by implementing caching in the entire application in an intelligent manner. Caching

asp.net DataList and Repeater usage Difference _ practical skill

Performance aspectsRepeater is better than DataList, if not very large amount of data, this difference is not reflected.Ease of UseRepeater and DataList background data binding is very simple, datasource= ... DataBind () It's OK.But the DataList in

asp.net page call JavaScript variable value _ Practical Tips

In the HTML page, the TextBox control is defined, Copy Code code as follows: Latitude: Longitude: Assign values directly to these two controls in JavaScript: Copy Code code as follows:

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