问题描述
更改Field（非自定义）数据类型的步骤是什么？
我转到自定义->自定义系统->实体->活动->字段->主题。我需要将类型从单行文本更改为选项集。我怎么做？
我有Visual Studio 2012和Microsoft Dynamics CRM SDK，但我没有经验。
What are the steps for changing Field's (not custom) data type?I go to Customizations -> Customize the System -> Entities -> Activity -> Fields -> Subject. I need to change Type from "Single Line of Text" to "Option set". How do I do that?I have Visual Studio 2012 and Microsoft Dynamics CRM SDK but I'm not experienced at it.
编辑：
是否需要检索FormXml是来自SystemForm实体？
Do I need to retrieve FormXml from SystemForm entity?
推荐答案
创建字段后，您不能更改其类型（只能更改属性，例如，数字类型或选项集条目的最小值和最大值。）
You can't change the type of the field after its creation (you can only change the properties, for example the minimum and maximum value for numeric types or the optionset entries).
如果是自定义字段，则可以删除并再次添加正确的类型，如果是标准字段建议的方法是将其从表单和视图中隐藏，然后创建一个新的自定义字段。
If is a custom field you can delete and add again with the right type, if is a standard field the suggested way is to hide it from forms and views and create a new custom field instead.
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