c# - 添加可选参数

Question

我想在下面的代码中为objTest.TestNumber提供可选的参数值。我的代码如下：

 public class TestInfo
{
    public int Id { get; set; }
    public string TestNumber { get; set; }
}       



public string TestUpdate(TestInfo objTest)
    {
        int retVal = 0;
        try
        {
            dataContext = new AccretiveAPIContext(GetConnection(locationId));
            retVal = dataContext.Database.ExecuteSqlCommand(
                     "EXEC usp_TestUpdate @ID, @TestNumber",
                     new SqlParameter("@ID", objTest.Id),
                     new SqlParameter("@TestNumber", objTest.TestNumber),

                 );
        }
        catch (Exception)
        {
            throw;
        }
        return retVal.ToString();
    }

请告诉我为使“ @TestNumber”，objTest.TestNumber作为可选参数而需要进行的更改。我想将其默认值设置为零（“ 0”）。

请帮忙。

Answer 1

甚至更容易-

            retVal = dataContext.Database.ExecuteSqlCommand(
                 "EXEC usp_TestUpdate @ID, @TestNumber",
                 new SqlParameter("@ID", objTest.Id),
                 new SqlParameter("@TestNumber", string.IsNullOrEmpty(objTest.TestNumber) ? "0" : objTest.TestNumber),