Question

我正在尝试检查重复记录，其中一个字段是日期... TxtNum是文本框，DtDate是DateTimePicker，还有一个名为CHECK_DUPLICATE的存储过程

在我的情况下，我不想检查确切的日期..但仅限年份..例如..如果两个条目为txtNum = 1000且两个字段的年份值为{，则记录重复{1}}

SQL：

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;
    }
}

但是它不起作用......它保存了记录，即使它是重复的。

Answer 1

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

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

1 个答案: