从 DateTimePicker 检查重复的年份值

Question

我正在尝试检查其中一个字段是日期的重复记录……TxtNum 是文本框，DtDate 是 DateTimePicker 和一个名为 CHECK_DUPLICATE[=17 的存储过程=]

在我的情况下，我不想检查确切的日期..但只检查年份..例如..如果两个条目是 txtNum = 1000 并且两个字段的年份值，则记录重复是 2017

public DataTable CHECK_DUPLICATE(string txtNum, string dtDateYear)
{
    DataTable dt = new DataTable();
    SqlParameter[] param = new SqlParameter[2];

    param[0] = new SqlParameter("@txtNum", SqlDbType.NVarChar, 50);
    param[0].Value = txtNum;

    param[1] = new SqlParameter("@dtDateYear ", SqlDbType.NVarChar, 5);
    param[1].Value = dtDateYear;

    dt = DAL.SelectData("CHECK_PROCURATION_DUPLICATE", param);
    DAL.close();
    return dt;
} 

private void btnAddProcuration_Click(object sender, EventArgs e)
{
    string year = DtDate.Value.ToString("yyyy");

    DataTable dt = new DataTable();
    dt = CHECK_DUPLICATE (txtNum.Text, year);
    if (dt.Rows.Count > 1)
        MessageBox.Show("Duplicated records", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }
}

SQL :

CREATE PROCEDURE [dbo].[CHECK_DUPLICATE]

    @Num nvarchar (50),
    @Year nvarchar (5),

AS
    BEGIN
        SELECT Num, DATEPART(YEAR, MyDate) AS 'Year'
        FROM tblMyList   
        WHERE     Num = @Num AND MyDate = @Year 
    END

但它没有用……即使记录是重复的，它也会保存记录。

Answer 1

MyDate = @Year 应该 DATEPART(YEAR, MyDate) = @Year 像：

CREATE PROCEDURE [dbo].[CHECK_DUPLICATE]

@Num nvarchar (50),
@Year nvarchar (5),

AS
BEGIN
    SELECT Num, DATEPART(YEAR, MyDate) AS 'Year'
    FROM   tblMyList   
    WHERE  Num = @Num AND DATEPART(YEAR, MyDate) = @Year 
END

从 DateTimePicker 检查重复的年份值

Check for duplicated year value from DateTimePicker

c#

datetimepicker

winforms