转载：SharePoint 2010 自定义字段类型--------省市区联动

最近有几个朋友问到了有关自定义字段类型的问题，为了让更多的人了解自定义字段类型的方法，特写一篇博客与大家分享，首先看一下解决方案目录

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

<?xml version="1.0" encoding="utf-8" ?>

<FieldTypes>

  <FieldType>

    <Field Name="TypeName">ProvinceCityArea</Field>

    <Field Name="ParentType">Text</Field>

    <Field Name="TypeDisplayName">Province City Area</Field>

    <Field Name="TypeShortDescription">省市区联动</Field>

    <Field Name="UserCreatable">TRUE</Field>

    <Field Name="FieldTypeClass">

      SharePointProject_Custom_FieldsType_Controls.Controls.ProvinceCityArea,

      $SharePoint.Project.AssemblyFullName$

    </Field>

  </FieldType>

  <FieldType>

    <Field Name="TypeName">ProvinceCity</Field>

    <Field Name="ParentType">Text</Field>

    <Field Name="TypeDisplayName">Province City</Field>

    <Field Name="TypeShortDescription">省市联动</Field>

    <Field Name="UserCreatable">TRUE</Field>

    <Field Name="FieldTypeClass">

      SharePointProject_Custom_FieldsType_Controls.Controls.ProvinceCity,

      $SharePoint.Project.AssemblyFullName$

    </Field>

  </FieldType>

</FieldTypes>

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

就这么简单，完成了，快来试吧。

分类: SharePoint

巴特西

转载：SharePoint 2010 自定义字段类型--------省市区联动

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巴特西

转载：SharePoint 2010 自定义 字段 类型--------省市区联动

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转载：SharePoint 2010 自定义字段类型--------省市区联动