将当前日期设置为数据集中的默认值?

问题描述:

我有一个数据集,我试图将默认值设置为当前日期和时间。我认为价值需要是一个字面意思。有没有办法做到这一点?因为我不能使用System.DateTime这样做它似乎。任何建议将是一个很大的帮助。

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.

您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;

如果从SQL Server数据库中获取数据,则可以使用 GETDATE 函数:

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

使用以下代码:

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

当表格写成 XML

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