Question

使用以下代码，我可以在MySql表中插入日期范围，但是我需要根据工作日限制日期。例如，我想限制所有日期进入星期三。

protected void Submit_click(object sender, EventArgs e)
{
DateTime startdate = Convert.ToDateTime(txtstartdate.Text);
DateTime enddate = Convert.ToDateTime(txtenddate.Text);
for (DateTime date = startdate; date <= enddate; date = date.AddDays(1))
{
    try
    {
        var shtdate = date.ToShortDateString();
        string MyConString = "SERVER=localhost;DATABASE=mydb;UID=myid;PASSWORD=abc123;";
        MySqlConnection connection = new MySqlConnection(MyConString);
        string cmdText = "INSERT INTO approved(agentlogin ,leavetype ,date ,time, reason)VALUES ( @login, @type, @date, 'Full day', @reason)";
        MySqlCommand cmd = new MySqlCommand(cmdText, connection);
        cmd.Parameters.AddWithValue("@login", Label1.Text);
        cmd.Parameters.AddWithValue("@type", ddlleavetype.Text);
        cmd.Parameters.AddWithValue("@date", shtdate);
        cmd.Parameters.AddWithValue("@reason", txtreason.Text);

        connection.Open();

        int result = cmd.ExecuteNonQuery();
        connection.Close();

        //lblError.Text = "Data Saved";

    }
    catch (Exception)
    {
        Console.Write("not entered");
        //lblError.Text = ex.Message;
    }
}
}

那我该怎么办呢？感谢您的帮助

Answer 1

您可以尝试DateTime.DayOfWeek跳过所有具有DayOfWeek.Wednesday或DayOfWeek.Thursday的日期，如下所示：

for (DateTime date = startdate; date <= enddate; date = date.AddDays(1))
{
    if (date.DayOfWeek == DayOfWeek.Wednesday || date.DayOfWeek == DayOfWeek.Thursday)
    {
        // skip to next day
        continue;
    }

    try 
    {
        // write to database
    }
    catch (Exception)
    {
        Console.Write("not entered");
        //lblError.Text = ex.Message;
    }
}

Answer 2

DateTime具有DayOfWeek属性。（请检查here）。

您只需在if语句中使用它，就可以了。

Answer 3

我不是根据星期三和星期四的两个工作日来制定条件，而是根据其他所有5天来编写条件，如下所示。

protected void Submit_click(object sender, EventArgs e)
{
    DateTime startdate = Convert.ToDateTime(txtstartdate.Text);
    DateTime enddate = Convert.ToDateTime(txtenddate.Text);
    for (DateTime date = startdate; date <= enddate; date = date.AddDays(1))
    {
         if (date.DayOfWeek == DayOfWeek.Monday || date.DayOfWeek == DayOfWeek.Tuesday || date.DayOfWeek == DayOfWeek.Friday || date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek == DayOfWeek.Sunday)
         {
              var shtdate = date.ToShortDateString();
              string MyConString = "SERVER=localhost;DATABASE=mydb;UID=myid;PASSWORD=abc123;";
              MySqlConnection connection = new MySqlConnection(MyConString);
              string cmdText = "INSERT INTO approved(agentlogin ,leavetype ,date ,time, reason)VALUES ( @login, @type, @date, 'Full day', @reason)";
              MySqlCommand cmd = new MySqlCommand(cmdText, connection);
              cmd.Parameters.AddWithValue("@login", Label1.Text);
              cmd.Parameters.AddWithValue("@type", ddlleavetype.Text);
              cmd.Parameters.AddWithValue("@date", shtdate);
              cmd.Parameters.AddWithValue("@reason", txtreason.Text);
              connection.Open();
              int result = cmd.ExecuteNonQuery();
         }
         else{ 
         }
    }

}

将日期插入MySql表时，阻止所有星期三和星期四

3 个答案: