如何将数据表格日期转换为特定字符串格式

Question

string actionDate = ((DateTime) objActionDescr.GetDataTable().Rows[0]["ActionDate"]).ToString("MM"); 

错误如我无效投射出来。请帮助

Answer 1

首先，检查值是否为空，然后将其转换为您需要的任何格式。 类似这样的：

//first, check if that column contains value 
if (!objActionDescr.GetDataTable().Rows[0].IsNull("ActionDate")) 
{ 
    //if value is there, do with it what you need... 

    //this will return month name, -> like August 
    string actionDateMonth = (Convert.ToDateTime(objActionDescr.GetDataTable().Rows[0]["ActionDate"])).ToString("MM"); 
    //this will return month number -> like 08 
    string actionDateMonthNumber = (Convert.ToDateTime(objActionDescr.GetDataTable().Rows[0]["ActionDate"])).ToString("mm"); 
    //same as above 
    actionDateMonthNumber = (Convert.ToDateTime(objActionDescr.GetDataTable().Rows[0]["ActionDate"])).Month.ToString(); 
}