自定义FieldRenderingControl Sharepoint 2010

我已在sharepoint项目中创建了一个自定义字段，并且该字段为空，我已覆盖FieldRendering控件，以便在显示列表中的项时创建自己的表布局

我遇到的问题是呈现控件类中的ItemFieldValue始终为null

如何获取要显示的字段的字段值

这是我的自定义字段类

namespace CustomFieldDefinitions.Fields
{
    public class AttributeField : SPField
    {
        #region Constructors

        /// <summary>
        /// This is a constuctor with two parameters.
        /// </summary>
        /// <param name="fields"></param>
        /// <param name="fieldName"></param>
        public AttributeField(SPFieldCollection fields, string fieldName)
            : base(fields, fieldName)
        {
        }

        /// <summary>
        /// This is a contructor with three parameters.
        /// </summary>
        /// <param name="fields"></param>
        /// <param name="typeName"></param>
        /// <param name="displayName"></param>
        public AttributeField(SPFieldCollection fields, string typeName, string displayName)
            : base(fields, typeName, displayName)
        {
        }

        #endregion

        #region Overridden Properties

        /// <summary>
        /// This ties the control used to support this field with the current implementation of it.
        /// </summary>
        public override BaseFieldControl FieldRenderingControl
        {
            [SharePointPermission(SecurityAction.LinkDemand, ObjectModel = true)]
            get
            {
                BaseFieldControl fieldControl = new AttributeFieldControl();
                fieldControl.FieldName = this.InternalName;
                return fieldControl;
            }
        }


        public override object GetFieldValue(string value)
        {
            return base.GetFieldValue(value);
        }

        #endregion

    }
}

最后是标记

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %> 
<%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" %>
<SharePoint:RenderingTemplate ID="AttributeFieldDisplayControl" runat="server">
    <Template>
        <asp:Label ID="lblAttValue" runat="server" BorderColor="Red"></asp:Label>
    </Template>
</SharePoint:RenderingTemplate>
<SharePoint:RenderingTemplate ID="AttributeFieldControl" runat="server">
    <Template>
        <asp:TextBox ID="txtAttValue" runat="server" BorderColor="Red"></asp:TextBox>
    </Template>
</SharePoint:RenderingTemplate>

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随函附上此问题的答案。我是一个巨大的白痴。调用BdcModel的ReadItem方法时，我没有设置传递到显示页面的对象的“AttributeValue”属性

---

所以有一次我补充说，一切都很好。感谢所有看过这篇文章的人。很抱歉，我浪费了你的时间。

我们可以看看你用来做这件事的标记/代码吗？谢谢你看一看，我已经发布了代码和标记。在FieldRenderingControl类中，它当前正在读取ListItemFieldValue，因为我一直在尝试每个属性，但我最初是从ItemFieldValue开始的。发布此消息后，我做了一些事情来尝试使其正常工作。我已经对该字段中显示的数据进行了硬编码，以确保有一个值要传递给显示、编辑和新视图。我还下载了几个正在运行的示例，并将它们与我自己的进行了比较，所有内容都按顺序显示。我只是不明白为什么列表视图中的值没有被传递到显示模式框。我还知道它正在使用我的自定义字段渲染控件，因为当我打开编辑表单时，我得到了一个红色边框的文本框。

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %> 
<%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" %>
<SharePoint:RenderingTemplate ID="AttributeFieldDisplayControl" runat="server">
    <Template>
        <asp:Label ID="lblAttValue" runat="server" BorderColor="Red"></asp:Label>
    </Template>
</SharePoint:RenderingTemplate>
<SharePoint:RenderingTemplate ID="AttributeFieldControl" runat="server">
    <Template>
        <asp:TextBox ID="txtAttValue" runat="server" BorderColor="Red"></asp:TextBox>
    </Template>
</SharePoint:RenderingTemplate>