Moss2007默认有许多常见类型,如:文本,日期,数字,选项… ,有时我们需要根据需求自定义一个类型!在WSS3.0中可以通过C#或者VB来编写扩展字段,所有的自动需要继承内置的Sharepoint类型(如:SPFieldText 和 SPFieldNumber)
字段类型构成
Demo:
打开VS2008, 新建Sharepoint类型的“Empty"工程 "CustomFieldsDemo",添加-->新项,选择 Field Control 类型,命名为: "ddlTree " , 字段描述的XML文件也自动生成了!
打开: ddlTree.Field.cs ,把继承修改为 "SPFieldChoice";
打开: ddlTree.FieldControl.cs , 把继承修改为 "BaseFieldControl"; 按你字段的需求写逻辑代码!
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 { //下面的用户控件名,<SharePoint:RenderingTemplate> 控件的ID 需要等于这个值 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 :ddlTree ddlTree = (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("设置为一级分类", "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 + "┗"; } } }
新建一个字段类型的呈现控件(这里新建一个用户控件)
<%@ 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>文件保存为:ddlTreeFieldRendering.ascx , 这个文件名和 RenderingTemplate 控件的ID 名 和 DefaultTemplateName属性值一致!
fldtypes_ddlTree.xml 里面的内容
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">这是一个下拉列表</Field> <Field Name="TypeShortDescription">直接多级的下拉列表</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>
打开你的站点,新建一个List 名为 "Tree " 效果如下, 因为上面代码需要获取Tree里面的数据,字段也要一样哦
部署,使用:
最后效果图:
参考书籍: SharePoint Server 2007 案例开发实战 杨永刚 著