如何删除自定义列表中从现有站点列添加的列?

“页面图像”是一种特殊的SharePoint字段,定义为 密封的

SPList list = web.Lists["CustomTest"];
SPField f = list.Fields["Page Image"];
f.Sealed = false;
f.Update();
list.Fields["Page Image"].Delete();

作为参考,该字段在中定义 C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES\PublishingResources\PublishingColumns.xml .

除了密封外,字段还可以是只读的、隐藏的等。所有这些因素都可能阻止删除该字段。删除列表字段的更合适方法如下:

public static bool RemoveField(SPField spField)
{
    if (spField == null)
    {
        WriteErrorToLog("spField is null! Please, provide a valid one");
        return false;
    }
 
    bool res = false;
    try
    {
        // check if it's a ReadOnly field.
        // if so, reset it
        if (spField.ReadOnlyField)
        {
            spField.ReadOnlyField = false;
            spField.Update();
        }
 
        // check if it's a Hidden field.
        // if so, reset it
        if (spField.Hidden)
        {
            spField.Hidden = false;
            spField.Update();
        }
 
        // check if the AllowDeletion property is set to false.
        // if so, reset it to true
        if (spField.AllowDeletion == null || !spField.AllowDeletion.Value)
        {
            spField.AllowDeletion = true;
            spField.Update();
        }
 
        // If the AllowDeletion property is set,
        // the Sealed property seems not to be examined at all.
        // So the following piece of code is commented.
        /*if(spField.Sealed)
        {
            spField.Sealed = false;
            spField.Update();
        }*/
 
        // If the AllowDeletion property is set,
        // the FromBaseType property seems not to be examined at all.
        // So the following piece of code is commented.
        /*if(spField.FromBaseType)
        {
            spField.FromBaseType = false;
            spField.Update();
        }*/
 
        // finally, remove the field
        spField.Delete();
        spField.ParentList.Update();
 
        res = true;
    }
    catch (Exception ex)
    {
        WriteErrorToLog(ex.Message);
    }
 
    return res;
}
 
public static bool RemoveField(SPList spList, string displayNameOrInternalNameOrStaticName)
{
    SPField spField = GetFieldByName(spList, displayNameOrInternalNameOrStaticName);
    if(spField == null)
    {
        WriteErrorToLog(string.Format("Couldn't find field {0}!", displayNameOrInternalNameOrStaticName));
        return false;
    }
 
    return RemoveField(spField);
}
 
public static void WriteErrorToLog(string errorMsg)
{
    // write error into log
}

通读 article on my blog ,以了解更多。

2. 在单选字段“允许管理内容类型”中,单击“是”,然后返回文档库设置

3. 在名为“内容类型”的新部分下,单击“文档”