SharePoint 2010 自定义 字段 类型--------三级互联（省县市）

• 
  

  

  创建自定义类型分以下几个步骤：

  第一步：添加SharePoint映射文件夹Xml，在Xml的文件名必须以fldtypes_开头，否则不能识别，为了更好的了解Xml里面的结构我们可以在服务器上打开，看一看系统是如何定义的。

  

  第二步：开始省市定义联动，XML定义

  View Code

  第三步：创建ProvinceCityControl 类文件，并继承 BaseFieldControl，省市的数据来源是另一张表

  

  代码主要重载 protected override void CreateChildControls()

  

  using System.Web.UI;using System.Web.UI.WebControls;using Microsoft.SharePoint;using Microsoft.SharePoint.WebControls;namespace SharePointProject_Custom_FieldsType_Controls.Controls{    public class ProvinceCityControl : BaseFieldControl    {        private DropDownList _ddlProvince;        private DropDownList _ddlCity;        private SPWeb _web;        private SPListCollection _listCollection;        private SPList _list;        private SPQuery _query;        private SPListItemCollection _listItemCollection;        protected override void CreateChildControls()        {            if (this.ControlMode == SPControlMode.Display)            {                this.Controls.Add(new LiteralControl("" + this.Value));            }            else            {                _ddlProvince = new DropDownList();                _ddlCity = new DropDownList();                using (_web = SPContext.Current.Web)                {                    _listCollection = _web.Lists;                    _list = _listCollection.TryGetList(Consts.LIST_DICTIONARY);                    if (_list != null)                    {                        #region Province                        _query = new SPQuery();                        _query.Query = string.Concat(                            "<Where>",                            "<Eq><FieldRef Name='Group_x003a_Title'/><Value Type='Lookup'>" + Consts.GROUP_PROVINCE + "</Value></Eq>",                            "</Where>"                            );                        _query.ViewFields = string.Concat(                            "<FieldRef Name='DictionaryName'/>",                            "<FieldRef Name='Title'/>"                            );                        _listItemCollection = _list.GetItems(_query);                        _ddlProvince.AutoPostBack = true;                        _ddlProvince.SelectedIndexChanged += new EventHandler(Province_SelectedIndexChanged);                        foreach (SPListItem item in _listItemCollection)                        {                            _ddlProvince.Items.Add(new ListItem(item["DictionaryName"].ToString(), item["Title"].ToString()));                        }                        #endregion                        #region City                        LoadCity();                        #endregion                    }                }                this.Controls.Add(_ddlProvince);                this.Controls.Add(new LiteralControl("-"));                this.Controls.Add(_ddlCity);            }        }        #region Province of autoPostBack        void Province_SelectedIndexChanged(object sender,EventArgs e)        {            LoadCity();        }        #endregion        #region Load City        void LoadCity()        {            _ddlCity.Items.Clear();            _query = new SPQuery();            _query.Query = string.Concat(                "<Where><And>",                "<Eq><FieldRef Name='Group_x003a_Title'/><Value Type='Lookup'>" + Consts.GROUP_CITY + "</Value></Eq>",                "<BeginsWith><FieldRef Name='Title'/><Value Type='Text'>" + _ddlProvince.SelectedValue.ToString() + "</Value></BeginsWith>",                "</And></Where>"                );            _listItemCollection = _list.GetItems(_query);            foreach (SPListItem item in _listItemCollection)            {                _ddlCity.Items.Add(new ListItem(item["DictionaryName"].ToString(), item["Title"].ToString()));            }        }        #endregion        public override object Value        {            get            {                return base.Value;            }            set            {                base.Value = value;            }        }    }}

  

  第四步：再创建一个类ProvinceCity ，并继承SPFieldText

  

  using Microsoft.SharePoint;using Microsoft.SharePoint.WebControls;namespace SharePointProject_Custom_FieldsType_Controls.Controls{    public class ProvinceCity:SPFieldText    {        public ProvinceCity(SPFieldCollection fields, string fieldName) : base(fields, fieldName) { }        public ProvinceCity(SPFieldCollection fields, string fieldType, string displayName) : base(fields, fieldType, displayName) { }        public override BaseFieldControl FieldRenderingControl        {            get            {                BaseFieldControl fc = new ProvinceCityControl();                fc.FieldName = this.InternalName;                return fc;            }        }     }}

  

  如果要设置默认值请Override DefaultValue，如果要验证格式是否正确 请Override GetValidatedString
  第五步：部署查看效果

  

  第六步：创建栏查看效果

  

  群：212099235