我想讀從SqlDatabase的數據,但我得到了IndexOutOfRangeException,這裏是我的表的截圖: 指數超出範圍的異常 - C#
所以在這裏我有一個獲取數據的功能從數據庫,並將其存儲到課程班的名單,我在lessons.Add()獲取異常:
public List<Lesson> GetLessonsFromDay(string Day)
{
command.CommandText = "SELECT * FROM [Scadule] WHERE [day]='" + Day + "'";
con.Open();
SqlDataReader sdr = command.ExecuteReader();
List<Lesson> lessons = new List<Lesson>();
while (sdr.Read())
{
lessons.Add(new Lesson(Day, (int)sdr["[num]"], (string)sdr["[time]"],(string)sdr["[class]"],(string)sdr["[where]"]));
}
con.Close();
return lessons;
}
在這裏,我lessonClass:
public class Lesson
{
public Lesson(string Day, int Num, string Time, string Class, string Where)
{
this.Day = Day;
this.Num = Num;
this.Time = Time;
this.Class = Class;
this.Where = Where;
}
public string Day { get; set; }
public int Num { get; set; }
public string Time { get; set; }
public string Class { get; set; }
public string Where { get; set; }
}
很可能,您的某個sdr []訪問是錯誤的。將每一個分配給一個字符串變量,並查看哪一個在調試器中失敗。 – OldProgrammer
我想知道你爲什麼在試圖獲取索引值時使用'[]'INSIDE indexer-string? 而不是嘗試'(int)sdr [「num」],' –