Moss2007默認有許多常見類型，如:文本,日期，數字，選項… ,有時我們需要根據需求自定義一個類型!在WSS3.0中可以通過C#或者VB來編寫擴展字段，所有的自動需要繼承內置的Sharepoint類型(如：SPFieldText 和 SPFieldNumber)

字段類型構成

• • 字段類型
  • 字段值類(不必需)
  • 字段展現部分(用戶控件或者直接輸出)
  • 字段描述文件(必須以fldtypes_開頭的文件)

Demo:

打開VS2008, 新建Sharepoint類型的“Empty＂工程 ＂CustomFieldsDemo＂，添加－－＞新項，選擇　Field Control 類型，命名為: ＂ddlTree ＂ , 字段描述的XML文件也自動生成了!

打開: ddlTree.Field.cs? ，把繼承修改為　＂SPFieldChoice＂;

打開: ddlTree.FieldControl.cs , 把繼承修改為 ＂BaseFieldControl＂; 按你字段的需求寫邏輯代碼!

ddlTree.FieldControl.csusing System; using System.Data; using System.Runtime.InteropServices; using System.Web.UI.WebControls; using Microsoft.SharePoint; using Microsoft.SharePoint.WebControls;namespace CustomFieldsDemo {[CLSCompliant(false)][Guid("74e4f4fc-ccb6-4c75-aafd-5fb04153820e")]public class ddlTreeFieldControl : BaseFieldControl //TextField{protected DropDownList ddlTree;protected override string DefaultTemplateName{get{//下面的用戶控件名,<SharePoint:RenderingTemplate> 控件的ID 需要等于這個值 return "ddlTreeFieldRendering";}}public override object Value{get{EnsureChildControls();return ddlTree.SelectedValue;}set{EnsureChildControls();ddlTree.SelectedValue = this.ItemFieldValue + "";}}public override void Focus(){EnsureChildControls();ddlTree.Focus();}protected override void CreateChildControls(){if (Field == null) return;base.CreateChildControls();if (ControlMode == SPControlMode.Display) return;//控件ID :ddlTreeddlTree = (DropDownList) TemplateContainer.FindControl("ddlTree");if (ddlTree == null)throw new ArgumentException("未找到ddlTree控件");ddlTree.ToolTip = Field.Title + "";ddlTree.TabIndex = TabIndex;ddlTree.CssClass = CssClass;if (!Page.IsPostBack)BindData();}//List Name : Tree private string sourceTreeList = "Tree";private void BindData(){SPWeb web = SPControl.GetContextWeb(Context);SPList treeList = web.Lists[sourceTreeList];SPListItemCollection items = treeList.Items;ddlTree.Items.Add(new ListItem("設置為一級分類", "0"));DataTable dt = items.GetDataTable();if(dt.Rows.Count>0){foreach (DataRow row in dt.Rows){if(row["ParentID"].ToString().Trim()=="0"){ddlTree.Items.Add(new ListItem(row["ClassName"] + "", row["ClassID"] + ""));BindChildData(dt, row["ClassID"] + "", 1);}}}}private void BindChildData(DataTable dt, string classID, int spaceLength){DataRow[] rows = dt.Select("ParentID=" + classID, "ClassID");foreach (DataRow row in rows){ddlTree.Items.Add(new ListItem(SpaceLength(spaceLength) + row["ClassName"] + "", row["ClassID"] + ""));}}private string SpaceLength(int spaceLength){string space = "";for (int i = 0; i < spaceLength; i++){space += " ";}return space + "┗";}} }

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新建一個字段類型的呈現控件(這里新建一個用戶控件)

<%@ Control Language="C#" Debug="true" %><%@ Assembly Name="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %><%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <SharePoint:RenderingTemplate ID="ddlTreeFieldRendering" runat="server"><Template><asp:DropDownList ID="ddlTree" runat="server"></asp:DropDownList></Template> </SharePoint:RenderingTemplate>?文件保存為:ddlTreeFieldRendering.ascx , 這個文件名和 RenderingTemplate 控件的ID 名 和 DefaultTemplateName屬性值一致!

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fldtypes_ddlTree.xml 里面的內容

fldtypes_ddlTree.xml<?xml version="1.0" encoding="utf-8" ?> <FieldTypes><FieldType><Field Name="TypeName">下拉列表</Field><Field Name="ParentType">Choice</Field><Field Name="TypeDisplayName">這是一個下拉列表</Field><Field Name="TypeShortDescription">直接多級的下拉列表</Field><Field Name="UserCreatable">TRUE</Field><Field Name="UserCreatable">TRUE</Field><Field Name="ShowOnListAuthoringPages">TRUE</Field><Field Name="ShowOnSurveyAuthoringPages">TRUE</Field><Field Name="ShowOnDocumentLibraryAuthoringPages">TRUE</Field><Field Name="ShowOnColumnTemplateAuthoringPages">TRUE</Field><Field Name="FieldTypeClass">CustomFieldsDemo.ddlTreeField,CustomFieldsDemo,Version=1.0.0.0,Culture=neutral,PublicKeyToken=9f4da00116c38ec5</Field><RenderPattern Name="DisplayPattern"><Switch><Expr><Column/></Expr><Case Value=""></Case><Default><Column SobColumnNumber="0" HTMLEncode="TRUE"/><HTML><![CDATA[<BR>]]></HTML><Column SobColumnNumber="1" HTMLEncode="TRUE"/><HTML><![CDATA[&NBSP;-&NBSP;]]></HTML><Column SobColumnNumber="2" HTMLEncode="TRUE"/><HTML><![CDATA[<BR>]]></HTML></Default></Switch></RenderPattern></FieldType></FieldTypes>

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打開你的站點，新建一個List 名為 ＂Tree ＂ 效果如下， 因為上面代碼需要獲取Tree里面的數據,字段也要一樣哦

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部署，使用:

把 ＂ddlTreeFieldRendering.ascx＂文件復制到? ＂C:\Program Files\Common Files\microsoft shared\Web Server Extensions\12\TEMPLATE\CONTROLTEMPLATES＂　;

把 fldtypes_ddlTree.xml? 文件復制到 C:\Program Files\Common Files\microsoft shared\Web Server Extensions\12\TEMPLATE\XML

把 工程的程序集 注冊到 GAC 并重啟IIS! 可使用vs Tools里面的? gacutil -if d:dll.dll? 注冊到GAC ， iisreset 重啟IIS

最后效果圖:

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參考書籍: SharePoint Server 2007 案例開發實戰 楊永剛 著

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Technorati 標簽: sharepoint,自定義字段類型

轉載于:https://www.cnblogs.com/jinho/archive/2010/12/03/1895298.html

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