我有一个数据集，我试图将默认值设置为当前日期和时间.我认为 value 需要是文字.有什么方法可以做到这一点吗?因为我似乎无法使用 System.DateTime 来做到这一点.任何建议都会有很大帮助.

I have a dataset that i am trying to set the default value as the current date and time. I believe that value needs to be a literal. Is there a certain way to do this? Because I am not able to do this using System.DateTime it seems.Any advice would be a great deal of help.

推荐答案

可以将相关列的默认值设置为

You can set the default value of relevant column as

dataTable1.Columns["dateTimeColumn"].DefaultValue = System.DateTime.Now;

如果您从 SQL Server 数据库中获取数据，则可以使用 GETDATE 函数设置默认值:

If you fetch data from a SQL Server database, then you can set the default value using the GETDATE function:

ALTER TABLE MyTable
ADD CONSTRAINT DF_MyTable_MyColumn
DEFAULT GETDATE() FOR MyColumn

使用此代码:

UploadHistory.Columns["FileUploadDate"].DefaultValue = System.DateTime.Now;

当表格写成XML时:

<xs:element name="FileUploadDate" 
            type="xs:dateTime" 
            default="2017-03-13T11:39:26.7980069-05:00" 
            minOccurs="0" />