3-2 SharePoint 开发自定义字段

1.新建CustomField类  主要进行关联

 

新建customfieldctrol 和用户控件 主要用与显示

 

 

新建xml进行关联

 

 

xml以特殊名称开头

 

查看解决方案assembly进行绑定

 

 

 

运行

 

 

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ljzCustomField
{
    class CustomField:SPFieldText
    {
        public CustomField(SPFieldCollection fields, string fieldName):base(fields, fieldName)
        {
        }

        public CustomField(SPFieldCollection fields, string typeName, string displayName):base(fields, typeName, displayName)
        {

        }
        public override string DefaultValue //设置字段的默认值
        {
            get
            {
                return "http://";
            }
        }

        public override BaseFieldControl FieldRenderingControl //关联字段展示控件
        {
            get
            {
                BaseFieldControl fc = new CustomFieldControl();
                fc.FieldName = this.InternalName;
                return fc;
            }
        }
        public override string GetValidatedString(object value)//验证字段是否符合要求
        {
            string StartStr = this.GetCustomProperty("CustomFieldProperty").ToString().ToLower();//获得字段属性
            string StartValue = string.Empty;
            if (value.ToString().Length > StartStr.Length)
            {
                StartValue = value.ToString().ToUpper().Substring(0, StartStr.Length).ToLower();
            }
            // this.Required是否必填项的值
            if (this.Required == true || value == null || StartStr != StartValue)
            {
                throw new SPFieldValidationException("该字段必须以" + StartStr + "开头");//将不符合要求的错误抛出来，以小红字显示在栏的下面
            }
            return base.GetValidatedString(value);
        }

    }
}

using Microsoft.SharePoint.Mobile.Controls;
using Microsoft.SharePoint.WebControls;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ljzCustomField
{
    class CustomFieldControl : BaseFieldControl
    {
        public TextBox tbStart;
        public Image myImage;
        //重写默认模板
        protected override string DefaultTemplateName
        {
            get
            {
                if (this.ControlMode == SPControlMode.Display)
                {
                    return this.DisplayTemplateName;
                }
                else
                {
                    return "DefaultCustomFieldControl";
                }
            }
        }

        //获取控件的值
        public override object Value
        {
            get
            {
                EnsureChildControls();
                if (tbStart != null)
                { return tbStart.Text; }
                else
                { return null; }
            }
            set
            {
                EnsureChildControls();
                if (tbStart != null)
                { tbStart.Text = (String)value; }
            }
        }
        public override string DisplayTemplateName
        {
            get
            {
                return "DisplayCustomFieldControl";
            }
            set
            {
                base.DisplayTemplateName = value;
            }
        }

        //重写控件生成方法
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            if (this.Field != null)
            {
                this.myImage = (Image)TemplateContainer.FindControl("myImage");
                this.tbStart = (TextBox)TemplateContainer.FindControl("tbStart");
            }
            if (this.ControlMode == SPControlMode.Display)
            {
                string strHeight = base.Field.GetCustomProperty("Height").ToString();
                string strWidth = base.Field.GetCustomProperty("Width").ToString();
                if (myImage != null)
                {
                    myImage.ImageUrl = this.ItemFieldValue.ToString();
                    myImage.Width = Convert.ToInt32(strWidth);
                    myImage.Height = Convert.ToInt32(strHeight);
                }
            }
        }





    }
}

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" %>
<%@ Assembly Name="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register TagPrefix="SharePoint" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" Namespace="Microsoft.SharePoint.WebControls" %>
<SharePoint:RenderingTemplate ID="DefaultCustomFieldControl" runat="server">
    <Template>
        <asp:TextBox ID="tbStart" runat="server" />
    </Template>
</SharePoint:RenderingTemplate>
<SharePoint:RenderingTemplate ID="DisplayCustomFieldControl" runat="server">
    <Template>
        <asp:Image ID="myImage" runat="server" />
    </Template>
</SharePoint:RenderingTemplate>

<?xml version="1.0" encoding="utf-8" ?>
<FieldTypes>
    <FieldType>
        <Field Name="TypeName">自定义单行文本</Field>
        <Field Name="ParentType">Text</Field>
        <Field Name="TypeDisplayName">必须有特定标识开头的单行文本</Field>
        <Field Name="TypeShortDescription">自定义单行文本</Field>
        <Field Name="UserCreatable">TRUE</Field>
        <Field Name="ShowOnListCreate">TRUE</Field>
        <Field Name="ShowOnSurveyCreate">TRUE</Field>
        <Field Name="ShowOnDocumentLibraryCreate">TRUE</Field>
        <Field Name="ShowOnColumnTemplateCreate">TRUE</Field>
        <Field Name="FieldTypeClass">ljzCustomField, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c1eee1c344380342</Field>
        <PropertySchema>
            <Fields>
                <Field Name="CustomFieldProperty" DisplayName="设置起始标识" MaxLength="255" Type="Text"></Field>
                <Field Name="Height" DisplayName="图片高度" MaxLength="255" Type="Text"></Field>
                <Field Name="Width" DisplayName="图片宽度" MaxLength="255" Type="Text"></Field>
            </Fields>
        </PropertySchema>
    </FieldType>
</FieldTypes>