ASP.NET 网页 - 帮手
Web Helpers 极大地简化了 Web 开发和常见编程任务。
ASP.NET 助手
ASP.NET 帮助程序是可以通过单行 Razor 代码访问的组件。
您可以使用存储为 .cshtml 文件的 Razor 语法构建自己的帮助程序，或使用内置的 ASP.NET 帮助程序。
您将在本教程的后续章节中学习如何使用 Razor 助手。
下面是一些有用的 Razor 助手的简短描述：
WebGrid 助手
WebGrid 帮助程序简化了显示数据的方式：
- 自动设置 HTML 表格来显示数据
- 支持不同的格式化选项
- 支持通过数据分页（第一、下、上、最后）
- 支持通过点击列标题进行排序
图表助手
"Chart Helper" 可以显示具有多种格式选项和标签的不同类型的图表图片。
图表助手可以显示数组、数据库或文件中的数据。
网络邮件助手
WebMail 帮助程序提供使用 SMTP（简单邮件传输协议）发送电子邮件的功能。
网页图片助手
WebImage 帮助程序提供了管理网页中图片的功能。
关键字：翻转、旋转、调整大小、水印。
第三方助手
借助 Razor，您可以利用内置或第三方帮助程序来简化电子邮件、数据库、多媒体和社交网络的使用以及导航和 Web 安全等许多其他问题。
分析（谷歌）
| Helper | Description |
|---|---|
| Analytics.GetGoogleHtml(webPropertyId) | Renders the Google Analytics JavaScript code for the specified ID. |
| Analytics.GetStatCounterHtml(project, security) | Renders the StatCounter Analytics JavaScript code for the specified project. |
| Analytics.GetYahooHtml(account) | Renders the Yahoo Analytics JavaScript code for the specified account. |
必应
| Helper | Description |
|---|---|
| Bing.SearchBox([boxWidth]) | Passes a search to Bing. To specify the site to search and a title for the search box, you can set the Bing.SiteUrl and Bing.SiteTitle properties. Normally you set these properties in the _AppStart page. |
| Bing.AdvancedSearchBox([, boxWidth] [, resultWidth] [, resultHeight] [, themeColor] [, locale]) |
Displays Bing search results in the page with optional formatting. To specify the site to search and a title for the search box, you can set the Bing.SiteUrl and Bing.SiteTitle properties. Normally you set these properties in the _AppStart page. |
加密货币
| Helper | Description |
|---|---|
| Crypto.Hash(string [, algorithm]) Crypto.Hash(bytes [, algorithm]) |
Returns a hash for the specified data. The default algorithm is sha256. |
| Helper | Description |
|---|---|
| Facebook.LikeButton(href [, buttonLayout] [, showFaces] [, width] [, height] [, action] [, font] [, colorScheme] [, refLabel]) |
Lets Facebook users make a connection to pages. |
上传文件
| Helper | Description |
|---|---|
| FileUpload.GetHtml([initialNumberOfFiles] [, allowMoreFilesToBeAdded] [, includeFormTag] [, addText] [, uploadText]) |
Renders UI for uploading files. |
玩家卡
| Helper | Description |
|---|---|
| GamerCard.GetHtml(gamerTag) | Renders the specified Xbox gamer tag. |
Gravatar 对象参考
| Helper | Description |
|---|---|
| Gravatar.GetHtml(email [, imageSize] [, defaultImage] [, rating] [, imageExtension] [, attributes]) |
Renders the Gravatar image for the specified email address. |
杰森
| Helper | Description |
|---|---|
| Json.Encode(object) | Converts a data object to a string in the JavaScript Object Notation (JSON) format. |
| Json.Decode(string) | Converts a JSON-encoded input string to a data object that you can iterate over or insert into a database. |
联享
| Helper | Description |
|---|---|
| LinkShare.GetHtml(pageTitle [, pageLinkBack] [, twitterUserName] [, additionalTweetText] [, linkSites]) |
Renders social networking links using the specified title and optional URL. |
模型状态
| Helper | Description |
|---|---|
| ModelStateDictionary.AddError(key, errorMessage) | Associates an error message with a form field. Use the ModelState helper to access this member. |
| ModelStateDictionary.AddFormError(errorMessage) | Associates an error message with a form. Use the ModelState helper to access this member. |
| ModelStateDictionary.IsValid | Returns true if there are no validation errors. Use the ModelState helper to access this member. |
对象信息
| Helper | Description |
|---|---|
| ObjectInfo.Print(value [, depth] [, enumerationLength]) | Renders the properties and values of an object and any child objects. |
验证码
| Helper | Description |
|---|---|
| Recaptcha.GetHtml([, publicKey] [, theme] [, language] [, tabIndex]) | Renders the reCAPTCHA verification test. |
| ReCaptcha.PublicKey ReCaptcha.PrivateKey |
Sets public and private keys for the reCAPTCHA service. Normally you set these properties in the _AppStart page. |
| ReCaptcha.Validate([, privateKey]) | Returns the result of the reCAPTCHA test. |
服务器信息
| Helper | Description |
|---|---|
| ServerInfo.GetHtml() | Renders status information about ASP.NET Web Pages. |
推特
| Helper | Description |
|---|---|
| Twitter.Profile(twitterUserName) | Renders a Twitter stream for the specified user. |
| Twitter.Search(searchQuery) | Renders a Twitter stream for the specified search text. |
视频
| Helper | Description |
|---|---|
| Video.Flash(filename [, width, height]) | Renders a Flash video player for the specified file with optional width and height. |
| Video.MediaPlayer(filename [, width, height]) | Renders a Windows Media player for the specified file with optional width and height. |
| Video.Silverlight(filename, width, height) | Renders a Silverlight player for the specified .xap file with required width and height. |
网络缓存
| Helper | Description |
|---|---|
| WebCache.Get(key) | Returns the object specified by key, or null if the object is not found. |
| WebCache.Remove(key) | Removes the object specified by key from the cache. |
| WebCache.Set(key, value [, minutesToCache] [, slidingExpiration]) | Puts value into the cache under the name specified by key. |
网页图片
| Helper | Description |
|---|---|
| WebImage(path) | Loads an image from the specified path. |
| WebImage.AddImagesWatermark(image) | Adds the specified image as a watermark. |
| WebImage.AddTextWatermark(text) | Adds the specified text to the image. |
| WebImage.FlipHorizontal() WebImage.FlipVertical() |
Flips the image horizontally or vertically. |
| WebImage.GetImageFromRequest() | Loads an image when an image is posted to a page during a file upload. |
| WebImage.Resize(width, height) | Resizes the image. |
| WebImage.RotateLeft() WebImage.RotateRight() |
Rotates the image to the left or the right. |
| WebImage.Save(path [, imageFormat]) | Saves the image to the specified path. |