我不斷收到錯誤 System.Data.SqlClient.SqlException: '#' 附近的語法不正確。

Question

嗨，請幫助我不斷收到錯誤 System.Data.SqlClient.SqlException: '#' 附近的語法不正確。 下面是代碼謝謝

private void AddBirthDayToCal(int startDayAtFlNumber)
        {
            var startDate = new DateTime(currentDate.Year, currentDate.Month, 1);
            var endDate = startDate.AddMonths(1).AddDays(-1);
            SqlConnection FamilyMembersConnection;
            FamilyMembersConnection = new SqlConnection("Data Source =.\\SQLEXPRESS; AttachDbFilename = " + Application.StartupPath + "\\MyFamily.mdf; Integrated Security = True; Connect                         Timeout = 30; User Instance = True");
            FamilyMembersConnection.Open();
            FamilyMembersCommand = new SqlCommand($"select * from FamilyMembers where Birthday between #{startDate.ToShortDateString()}# and #{endDate.ToShortDateString()}#", FamilyMembersConnection);
            FamilyMembersAdapter = new SqlDataAdapter();
            FamilyMembersAdapter.SelectCommand = FamilyMembersCommand;
            FamilyMembersTable = new DataTable();
            FamilyMembersAdapter.Fill(FamilyMembersTable);
            foreach (DataRow row in FamilyMembersTable.Rows)
            {
                var BirthDay = DateTime.Parse(Conversions.ToString(row["BirthDay"]));
                var link = new LinkLabel();
                link.Tag = row["FamilyMembersID"];
                link.Name = $"link{row["FamilyMembersID"]}";
                link.Text = Conversions.ToString(row["First_Name"]);
                listFlDay[BirthDay.Day - 1 + (startDayAtFlNumber - 1)].Controls.Add(link);
            }
        }

Answer 1

這是因為您在查詢中放入了“#”

FamilyMembersCommand = new SqlCommand($"select * from FamilyMembers where Birthday between #{startDate.ToShortDateString()}# and #{endDate.ToShortDateString()}#", FamilyMembersConnection);

改成這樣

FamilyMembersCommand = new SqlCommand($"select * from FamilyMembers where Birthday between '{startDate.ToShortDateString()}' and '{endDate.ToShortDateString()}'", FamilyMembersConnection);

Answer 2

sql 中的# 允許您在當前會話中引用臨時對象或過程。 話雖如此，您不應該在查詢中需要任何 #。 我假設你想用單引號替換那些，因為你正在做的字符串插值應該解析你傳入的屬性。