SqlBulkCopy时间数据类型问题

Question

如何将时间批量复制到SQL Server数据库表中？

例如，我正在将Excel工作表导入我的应用程序，其中一个字段为Start Time，映射到它的数据为10:30:00但是当它将其导入表格时会显示30/12/1899 10:30:00。我怎样才能摆脱日期部分？

我尝试将数据库中的格式更改为Time，varchar，DateTime，但所有格式都相同。

string conString = string.Empty;
string extension = Path.GetExtension(FileUpload1.PostedFile.FileName);

switch (extension)
{
    case ".xls": //Excel 97-03
        conString = ConfigurationManager.ConnectionStrings["Excel03ConString"].ConnectionString;
        break;

    case ".xlsx": //Excel 07 or higher
        conString = ConfigurationManager.ConnectionStrings["Excel07+ConString"].ConnectionString;
        break;
}

conString = string.Format(conString, excelPath);

using (OleDbConnection excel_con = new OleDbConnection(conString))
{
    excel_con.Open();
    string sheet1 = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null).Rows[0]["TABLE_NAME"].ToString();

    DataTable dtExcelData = new DataTable();

    //It is recommended as otherwise the data will be considered as String by default.
    dtExcelData.Columns.AddRange(new DataColumn[18] { 
         new DataColumn("Name of Staff", typeof(string)),
         new DataColumn("Host Key of Staff", typeof(int)),
         new DataColumn("Name of Department", typeof(string)),
         new DataColumn("Description of Preferred Zone of Staff", typeof(string)),
         new DataColumn("User Text 2 of Staff", typeof(string)),
         new DataColumn("Name of Programmes of Study of Module", typeof(string)),
         new DataColumn("Description of Programmes of Study of Module", typeof(string)),
         new DataColumn("Host Key of Locations", typeof(string)),
         new DataColumn("Host Key of Module", typeof(string)),
         new DataColumn("Description of Module", typeof(string)),
         new DataColumn("Name", typeof(string)),
         new DataColumn("Scheduled Start Date", typeof(string)),
         new DataColumn("Teaching week pattern of Scheduled Activities as end date", typeof(string)),
         new DataColumn("Section ID", typeof(string)),
         new DataColumn("Description of Type", typeof(string)),
         new DataColumn("Scheduled Start as day name", typeof(string)),
         new DataColumn("Scheduled Start as start time", typeof(string)),
         new DataColumn("Scheduled Finish as end time", typeof(string)),
     });

     using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [" + sheet1 + "]", excel_con))
     {
         oda.Fill(dtExcelData);
     }

     excel_con.Close();

     string consString = ConfigurationManager.ConnectionStrings["PayrollPlusConnectionString"].ConnectionString;

     using (SqlConnection con = new SqlConnection(consString))
     {
         using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con))
         {
             //Set the database table name
             sqlBulkCopy.DestinationTableName = "dbo.Data";

             // Map the Excel columns with that of the database table
             sqlBulkCopy.ColumnMappings.Add("Name of Staff", "NameOfStaff");
             sqlBulkCopy.ColumnMappings.Add("Host Key of Staff", "HostKey");
             sqlBulkCopy.ColumnMappings.Add("Name of Department", "Department");
             sqlBulkCopy.ColumnMappings.Add("Description of Preferred Zone of Staff", "Campus");
             sqlBulkCopy.ColumnMappings.Add("User Text 2 of Staff", "Grade");
             sqlBulkCopy.ColumnMappings.Add("Name of Programmes of Study of Module", "AOS");
             sqlBulkCopy.ColumnMappings.Add("Description of Programmes of Study of Module", "AOSDescription");
             sqlBulkCopy.ColumnMappings.Add("Host Key of Locations", "Room");
             sqlBulkCopy.ColumnMappings.Add("Host Key of Module", "ModuleAOS");
             sqlBulkCopy.ColumnMappings.Add("Description of Module", "ModuleDescription");
             sqlBulkCopy.ColumnMappings.Add("Name", "Activity");
             sqlBulkCopy.ColumnMappings.Add("Scheduled Start Date", "StartDate");
             sqlBulkCopy.ColumnMappings.Add("Teaching week pattern of Scheduled Activities as end date", "EndDate");
             sqlBulkCopy.ColumnMappings.Add("Section ID", "SectionID");
             sqlBulkCopy.ColumnMappings.Add("Description of Type", "Type");
             sqlBulkCopy.ColumnMappings.Add("Scheduled Start as day name", "Day");
             sqlBulkCopy.ColumnMappings.Add("Scheduled Start as start time", "StartTime");
             sqlBulkCopy.ColumnMappings.Add("Scheduled Finish as end time", "EndTime");

             con.Open();
             sqlBulkCopy.WriteToServer(dtExcelData);
             con.Close();

             lblStatus.Text = "Upload Successful";
        }
    }
}