如何使用ASP.NET2.0的“內嵌資源”)

作者 volnet（可以叫我大V）

關於內嵌資源在MSDN已經有一些基本的介紹：“內嵌資源”()

這裡我們要介紹的內容將讓這些資源變得更加簡潔。

通常我們在ASP.NET2.0中使用內嵌資源的時候只需完成以下幾步：

1.添加資源檔，如：

2.將資源檔的編譯方式變為“內嵌資源”，如：

3.添加Assembly資訊（AssemblyInfo.CS或者在具體類的namespace之上），如：

[assembly: System.Web.UI.WebResource("IntelligenceTextBox.JScript.IntelligenceTextBox.js", "application/x-javascript")][assembly: System.Web.UI.WebResource("IntelligenceTextBox.CSS.IntelligenceTextBoxStylesheet.css", "text/css")]

4.將資源檔註冊到分頁檔中（在protected override void OnPreRender(System.EventArgs e)裡），如：

Page.ClientScript.RegisterClientScriptResource(this.GetType(), "IntelligenceTextBox.JScript.IntelligenceTextBox.js");

完成這一步後的指令檔就會在PreRender的時候輸出到前台Html中。如：

<script src="/WebResource.axd?d=XBIPl09lmgYKinSg7vem6zAjPh9zda0B5YvbMz9cdk-Dtoq3pnz_VUoa1-xOFpiq0&amp;t=633419848307656250" type="text/javascript"></script>這樣就可以在分頁檔中引用相關的資源檔中的內容了。但是我們注意到RegisterClientScriptResource在產生的時候都會當作application/x-javascript來輸出，因此最終都只能得到type="text/javascript"，而這樣的設定則不符合其他類型資源的輸入規則。為此我構建了下面這個類，僅完成了MetaType類型為text/css的資源的輸出，但它很容易擴充成支援各種格式的類型，而擴充需要您做的事很少。引入資源的方式卻十分簡單。思路：添加資源到頁面，無非就是做到如上所示的1到4點，而唯一要解決的就是不同的metaType所特定的格式不同，如：CSS:<link href="{0}" rel="stylesheet" type="text/css"/>JavaScript：<script src="{0}" type="text/javascript"></script>而我們的期待的表現形式則形如上文第4點所示的方式，另外需要解決的一個問題是一個頁面多個資源不用重複註冊的問題。是否添加重複資源的問題應該留給使用者自行解決，因此通過提供IsResourceRegistered方法給使用者進行自行判斷。[下面的代碼需要經過改造後才能通過.NET2.0編譯器的編譯，否則預設使用.NET3.0以上編譯器可以編譯，請見諒！]調用代碼（樣本）：protected override void OnPreRender(System.EventArgs e) { base.OnPreRender(e); if (Page != null) { ClientScriptHelper cs = new ClientScriptHelper(this.Page); string cssName = "IntelligenceTextBox.CSS.IntelligenceTextBoxStylesheet.css"; if (!cs.IsResourceRegistered(cssName)) cs.RegisterResource<IntelligenceTextBox>(this, ClientScriptHelper.MetaType.TextCSS, cssName); //Page.ClientScript.RegisterClientScriptResource(this.GetType(), "IntelligenceTextBox.JScript.IntelligenceTextBox.js"); string jsName = "IntelligenceTextBox.JScript.IntelligenceTextBox.js"; if (!cs.IsResourceRegistered(jsName)) cs.RegisterResource<IntelligenceTextBox>(this, ClientScriptHelper.MetaType.TextJavaScript, jsName); } }原始碼：using System.Web.UI;using System.Web.UI.WebControls;using System.Collections;namespace IntelligenceTextBox{ internal class ClientScriptHelper { private IDictionary resourceActuals; /// <summary> /// Get the parent container (page) reference. /// </summary> /// <param name="container"></param> public ClientScriptHelper(Page container) { resourceActuals = container.Items; } /// <summary> /// Reigister the resource to the page. /// </summary> /// <typeparam name="T">The type of resource.</typeparam> /// <param name="sender">The resource.</param> /// <param name="metaType">The metaType of the resource.</param> /// <param name="resourceName">The name of the resource.</param> public void RegisterResource<T>(T sender, MetaType metaType, string resourceName) where T : Control { ResourceInfo resourceInfo = ResourceHtmlTemplateFactory(metaType, sender.Page); if (sender != null) { Literal resourceLiteral = new Literal(); resourceLiteral.Text = string.Format(resourceInfo.HtmlTemplate, sender.Page.ClientScript.GetWebResourceUrl(typeof(T), resourceName) ); resourceInfo.Where.Controls.Add(resourceLiteral); if (!resourceActuals.Contains(resourceName)) resourceActuals.Add(resourceName, resourceLiteral); } } /// <summary> /// Make sure is the resource has been registered in the current Page. /// </summary> /// <param name="resourceName">The name of the resource.</param> /// <returns></returns> public bool IsResourceRegistered(string resourceName) { return resourceActuals.Contains(resourceName); } /// <summary> /// The factory to create the right ResourceInfo for render. /// </summary> /// <param name="metaType">MetaType of the resource.</param> /// <param name="container">The page will contain the resource</param> /// <returns></returns> private static ResourceInfo ResourceHtmlTemplateFactory(MetaType metaType, Page container) { ResourceInfo resource = new ResourceInfo() { HtmlTemplate = string.Empty, Where = container.Header }; if (metaType == MetaType.TextCSS) { resource.HtmlTemplate = "\n<link href="{0}" rel="stylesheet" type="text/css"/>"; resource.Where = container.Header; } else if (metaType == MetaType.TextJavaScript) { resource.HtmlTemplate = "\n<script src="{0}" type="text/javascript"></script>"; resource.Where = container.Header; } //Todo: Add the other metatype ResourceInfo instance. return resource; } /// <summary> /// The infomation of resource depend on the metatype. /// </summary> internal class ResourceInfo { /// <summary> /// The html syntax of the resource. /// e.g. /// text/css: \n<link href="{0}" rel="stylesheet" type="text/css"/> /// </summary> public string HtmlTemplate { get; set; } /// <summary> /// The place to render the html syntax. /// </summary> public System.Web.UI.HtmlControls.HtmlControl Where { get; set; } } /// <summary> /// MetaType /// </summary> public enum MetaType { TextCSS, TextJavaScript } }}#c#專欄