SharePoint 集成Ajax 的应用

在SharePoint中集成Ajax的功能并不复杂，只需要8个步骤即可。第一个是安装Ajax的支持，剩下七个则是修改需要提供Ajax支持的网站的web.config文件即可。

1．安装ASP.NET AJAX Extensions 1.0。也可以用3.5的dll.不过<add assembly="System.Web.Extensions, Version=1.0.61025.0,Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>要根据assembly里的最新的System.Web.Extensions。我用

<SafeControl Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TypeName="*" Safe="True" />。可行。

2．打开SharePoint网站集所在的WebApplication的目录。例如：C:"inetpub"wwwroot"wss"virtualdirectories"80。并打开目录中的web.config文件。这里我推荐使用VS来编辑这个文件，理由是不容易出错，如果设置有错误则会有红色下划线的职能提示，而且有自动缩进，保证格式。在记事本里面却不能保证这些。

3．在<configSections>标记中添加如下的<sectionGroup>元素。

4．在<system.web>/<pages>标记中添加<controls>部分。

5．在<compilation>标记的<assemblies>元素中添加如下标记。

6．在<httpHandlers>部分的最后注册HTTP Handlers。

7．在<httpModules>部分中所有module之后添加注册下面的HTTP Module。

8．在<SharePoint>/<SafeControls>中为System.Web.Extensions组件添加SafeControl。

9．最后，在<configuration>标记内的最低部（仅在</configuration>之前），添加如下内容。

<system.web.extensions>
   <scripting>
     <webServices>
     
     
     
     
     </webServices>
     
   </scripting>
   </system.web.extensions>
   <system.webServer>
   <validation validateIntegratedModeConfiguration="false"/>
   <modules>
     <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>d
   </modules>
   <handlers>
     <remove name="WebServiceHandlerFactory-Integrated" />
     <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode"
          type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
     <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
     <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
   </handlers>
</system.webServer>

完成。

using System;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;

namespace WebPartForAjax
{
    [Guid("167a7058-cd16-4229-84ea-4da3bcb67858")]
    public class AjaxUpdatePanelPart : System.Web.UI.WebControls.WebParts.WebPart
    {

        private Label label;
        private TextBox textBox;
        private UpdatePanel up;
        private Button button;
        private ScriptManager _AjaxManager;

        //自定义一个ScriptManager用来存储获取的ScriptManager
        [WebPartStorage(Storage.None)]
        public ScriptManager AjaxManager
        {
            get { return _AjaxManager; }
            set { _AjaxManager = value; }
        }

        //页面初始化事件
        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            //获取页面上的ScriptManager
            _AjaxManager = ScriptManager.GetCurrent(this.Page);
            //如果页面上没有ScriptManager时追加一个
            if (_AjaxManager == null)
            {
                _AjaxManager = new ScriptManager();
                _AjaxManager.EnablePartialRendering = true;

Page.ClientScript.RegisterStartupScript(typeof(AjaxUpdatePanelPart),this.ID,"_spOriginalFormAction = document.forms[0].action;",true);

                if (this.Page.Form != null)
                {
                    string formOnSubmitAtt = this.Page.Form.Attributes["onsubmit"];
                    if (!string.IsNullOrEmpty(formOnSubmitAtt) && formOnSubmitAtt == "return _spFormOnSubmitWrapper();")
                    {
                        this.Page.Form.Attributes["onsubmit"] = "_spFormOnSubmitWrapper();";
                    }
                    this.Page.Form.Controls.AddAt(0, _AjaxManager);
                }
            }
        }

        //创建各个控件,并填充UpdatePanel
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            this.EnsureUpdatePanelFixups();

            up = new UpdatePanel();
            up.ID = "UpdatePanel1";
            up.ChildrenAsTriggers = true;
            up.RenderMode = UpdatePanelRenderMode.Inline;
            up.UpdateMode = UpdatePanelUpdateMode.Always;

            this.textBox = new TextBox();
            this.textBox.ID = "TextBox";
            up.ContentTemplateContainer.Controls.Add(this.textBox);

            this.label = new Label();
            this.label.Text = "Enter your name.";
            up.ContentTemplateContainer.Controls.Add(this.label);

            this.button = new Button();
            button.CausesValidation = false;
            button.ID = "Button1";
            button.Text = "Say Hello";
            button.Click += new EventHandler(HandleButtonClick);
            up.ContentTemplateContainer.Controls.Add(this.button);
            _AjaxManager.RegisterAsyncPostBackControl(this.button);

this.Controls.Add(up);
}

        private void HandleButtonClick(object sender, EventArgs eventArgs)
        {
            this.label.Text = "Hello " + this.textBox.Text;
        }

/*在MOSS中，为了正确解析某些特殊的URLs，例如包含汉字等两比特字符的URL，

* Windows SharePoint Services JavaScript使用form onSubmit wrapper重载默认的form action，

* 下面这个方法用来恢复默认的form action，如果你的URL里不包含汉字等双字节的字符，

* 那么，恭喜，你可以使用ASP.NET AJAX UpdatePanels

* （具体请参考上文中提到的「moss开发团队blog」） */

        private void EnsureUpdatePanelFixups()
        {
            if (this.Page.Form != null)
            {
                string formOnSubmitAtt = this.Page.Form.Attributes["onsubmit"];
                if (formOnSubmitAtt == "return _spFormOnSubmitWrapper();")
                {
                    this.Page.Form.Attributes["onsubmit"] = "_spFormOnSubmitWrapper();";
                }
            }

            ScriptManager.RegisterStartupScript(this,typeof(AjaxUpdatePanelPart),"UpdatePanelFixup","_spOriginalFormAction = document.forms[0].action; _spSuppressFormOnSubmitWrapper=true;",true);
        }
    }
}