Question

  protected void ButtonSave_Click(object sender, EventArgs e) {
         using (IntranETEntities context = new IntranETEntities())
         {
                CUSTOMER customer = context.CUSTOMERs.FirstOrDefault<CUSTOMER>(p => p.CODE == TxtName.Text);
                CUSTOMER_EXTENSION customerextension = null;
                IE_CUSTOMER_INFO customerInfo = null;
                ACADEMY academy = new ACADEMY();
                JOB job = new JOB();

                if (customer == null)
                {
                    customer = new CUSTOMER();
                    context.AddToCUSTOMERs(customer);

                    customerextension = new CUSTOMER_EXTENSION();
                    customer.CUSTOMER_EXTENSION.Add(customerextension);


                    customerInfo = new IE_CUSTOMER_INFO();
                    customer.IE_CUSTOMER_INFO.Add(customerInfo);
                }
                else
                {
                    customer.CUSTOMER_EXTENSION.Load();
                    customer.IE_CUSTOMER_INFO.Load();

                    customerextension = customer.CUSTOMER_EXTENSION.FirstOrDefault<CUSTOMER_EXTENSION>();
                    customerInfo = customer.IE_CUSTOMERINFO.First<IE_CUSTOMER_INFO>();

                    if (customerextension == null)
                    {
                        customerextension = new CUSTOMER_EXTENSION();
                        customer.CUSTOMER_EXTENSION.Add(customerextension);
                    }
                    else
                        customerextension.UPDATESEQ++;

                    if (customerInfo == null)
                    {
                        customer;Info = new IE_CUSTOMER_INFO();
                        customer.IE_CUSTOMER_INFO.Add(customerInfo);
                    }

                    ....
                    customerextension.CREATE_DATE = DateTime.Now;  
                    ....
                    context.SaveChanges();//Error is occuring here.
                } }

我正在使用我更新的EntityFramework。当我调试此代码时，我收到一条错误，指出“将datetime2数据类型转换为smalldatetime数据类型会导致超出范围的值。\ r \ n语句已终止。” 我无权更改数据库中列的类型。该列不为空。我该如何解决？

感谢您的回复!!!

Answer 1

smalldatetime介于1900-01-10和2079-06-06之间。如果您的日期超出此范围（.Net中的日期时间的默认值为0001-01-01），则会出现此错误。

Answer 2

您将异常标记为在分配时发生：

 ....
 customerextension.CREATE_DATE = DateTime.Now; //Error is occuring here.
 ....

但我希望在SaveChanges()通话期间实际发生此异常？

我怀疑在保存对象图中的某个地方还有另一个DateTime属性（除了你指出的CREATE_DATE之外），而其他属性没有被初始化。 DateTime属性的默认值超出了smalldatetime所需的范围，因此如果使用默认的DateTime属性创建新的EF对象，它将抛出此异常。

EF中的Datetime2到smalldatetime转换

2 个答案: