我有一个带有 2 个 datetimepicker 控件的 Windows 窗体：一个用于日期，一个单独的 datetimepicker 控件用于时间。这两个控件都绑定到数据库中的同一列，并且控件具有不同的属性名称（即 dateEdit 和 timeEdit）和不同的格式（即 Long 和 Time）。
这是我的问题/问题：
- timeEdit 选择器忽略数据库条目中的任何秒数，并将时间秒数设置为“00”，如“2:34:00”，即使数据库条目（为该插图修剪为时间）是“14:34： 31.891123 -04:00”。如何让秒数正确显示？
- 每当我将 timeEdit 选择器中的秒数从“00”编辑为（例如）“15”时，如“2:34:15”，选择器会将秒数重置为“00” ，然后再将值传递给下一个函数。如何传递正确的秒值？
- 我想编辑时间的毫秒数。将修剪后的毫秒（使用 DATEPART）绑定到文本框对我来说最好吗？我是否需要将毫秒转换或转换为字符或字符串才能在文本框中正确显示它们？
谢谢你的帮助！
触发编辑表单的代码：
private void timeDataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
try
{
if (e.ColumnIndex == 5)
{
EditTime editForm = new EditTime((Guid)timeDataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex].Value);
editForm.StartPosition = FormStartPosition.CenterScreen;
editForm.ShowDialog();
editForm.Close();
}
}
catch (Exception ex)
{
string msg = "Error: ";
msg += ex.Message;
throw new Exception(msg);
}
}
表格代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace StatusManager
{
public partial class EditTime : Form
{
private Guid calendarId;
public EditTime()
{
InitializeComponent();
}
public EditTime(Guid Id)
{
InitializeComponent();
calendarId = Id;
}
public string GetConnectionString()
{
var connString = ConfigurationManager.ConnectionStrings["StatusManager.Properties.Settings.StatusConnectionString"].ConnectionString;
return connString;
}
private void UpdateCalendarItem(string dateEdit, string timeEdit, string note)
{
var conn = new SqlConnection(GetConnectionString());
const string UpdateStatusSql = @"UPDATE dbo.statuses SET
calendarTime = @timeOffset
notes = @note
WHERE PK_calendarUID = @PK_calendarUID";
try
{
SqlCommand cmd = new SqlCommand(UpdateSql, conn);
var param = new SqlParameter[3];
param[0] = new SqlParameter("@PK_calendarUID", calendarId);
//Convert date(s) to correct format
string dateTimeCombined = dateEdit + " " timeEdit;
DateTime timeConverted = Convert.ToDateTime(dateTimeCombined);
DateTimeOffset timeOffset = new DateTimeOffset(timeConverted);
param[1] = new SqlParameter("@timeOffset", timeOffset);
param[2] = new SqlParameter("@note", note);
foreach (SqlParameter t in param)
{
cmd.Parameters.Add(t);
}
conn.Open();
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
}
catch (SqlException ex)
{
string msg = "Error updating 'calendarItems': ";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
conn.Close();
}
}
private void editTimeButton_Click(object sender, EventArgs e)
{
UpdateCalendarItem(dateEdit.Text, timeEdit.Text, notes.Text);
this.Close();
}
private void EditTime_Load(object sender, EventArgs e)
{
this.locationsTableAdapter.Fill(this.locationsDataSet.locations);
this.calendarTableAdapter.FillById(this.calendarDataSet.calendarItems, calendarId);
}
}
}
实例化 datetimepicker 的代码：
this.timeEdit.CustomFormat = "";
this.timeEdit.DataBindings.Add(new System.Windows.Forms.Binding("Text", this.calendarBindingSource, "calendarTime", true));
this.timeEdit.Format = System.Windows.Forms.DateTimePickerFormat.Time;
this.timeEdit.Location = new System.Drawing.Point(385, 30);
this.timeEdit.Name = "timeEdit";
this.timeEdit.ShowUpDown = true;
this.timeEdit.Size = new System.Drawing.Size(89, 20);
this.timeEdit.TabIndex = 2;