Sharepoint 如何向现有选项字段添加更多选项

以下是我的设置：

我有一个包含此字段的列表（从vs2010创建）：

（B）

这两个选项都运行良好，没有错误，之后$uf.Choices显示了刚刚添加的“Fish”选项，但两个更改都没有保存

我做错了什么

致以最良好的祝愿，

---

Armin

从代码隐藏处尝试以下代码：

string newField = string.Concat("<Field Type='Choice' DisplayName='",
                    "FieldName", "' Name='", "FieldName", "' ",
                    "Format='Dropdown' Required='TRUE' Indexed='TRUE'><CHOICES>",
                    "<CHOICE>1</CHOICE>",
                    "<CHOICE>2</CHOICE>",
                    "<CHOICE>3</CHOICE>",
                    "</CHOICES><Default>1</Default>",
                    "<Description> Status.",
                    "</Description></Field>");

    list.Fields.AddFieldAsXml(newField, true,SPAddFieldOptions.AddFieldToDefaultView);
    Web.Update();

string newField=string.Concat（“”，
"1",
"2",
"3",
"1",
“地位。”，
"");
list.Fields.AddFieldAsXml（newField、true、SPAddFieldOptions.AddFieldToDefaultView）；
Web.Update（）；

尝试使用powershell

$suryafield = "<Field Type='Choice' DisplayName='Surya' Required='TRUE' Format='Dropdown' Group='Custom Columns'
      FillInChoice='FALSE' StaticName='Surya' Name='Surya'>
            <CHOICES>
                <CHOICE>YES</CHOICE>
                <CHOICE>NO</CHOICE>
            </CHOICES>
           </Field>"
      $web.Fields.AddFieldAsXml($suryafield)

$suryafield=”
对
不
"
$web.Fields.AddFieldAsXml（$suryafield）

欲了解更多信息，请参阅本文

$w = Get-SPWeb http://intranet/foo
$l = $w.Lists["Dynamics-Nav List"]
$uf = $l.Fields["Fruits"]
$uf.Choices
$uf.Choices.Add("Fish");
$uf.update()
$l.update();

string newField = string.Concat("<Field Type='Choice' DisplayName='",
                    "FieldName", "' Name='", "FieldName", "' ",
                    "Format='Dropdown' Required='TRUE' Indexed='TRUE'><CHOICES>",
                    "<CHOICE>1</CHOICE>",
                    "<CHOICE>2</CHOICE>",
                    "<CHOICE>3</CHOICE>",
                    "</CHOICES><Default>1</Default>",
                    "<Description> Status.",
                    "</Description></Field>");

    list.Fields.AddFieldAsXml(newField, true,SPAddFieldOptions.AddFieldToDefaultView);
    Web.Update();

$suryafield = "<Field Type='Choice' DisplayName='Surya' Required='TRUE' Format='Dropdown' Group='Custom Columns'
      FillInChoice='FALSE' StaticName='Surya' Name='Surya'>
            <CHOICES>
                <CHOICE>YES</CHOICE>
                <CHOICE>NO</CHOICE>
            </CHOICES>
           </Field>"
      $web.Fields.AddFieldAsXml($suryafield)