尝试将日期和时间数据从 DataGridView 播种到 DateTimePicker 时，字符串未被识别为有效的 DateTime 错误

Question

我想显示日期和时间 （格式：dd/MM/yyyy h:mm tt） 从“DateTime 到 DateTimePicker”列。但它显示错误 字符串未被识别为有效的日期时间。

Private Sub dgvSchedule_RowEnter(sender As Object, e As DataGridViewCellEventArgs) Handles dgvSchedule.RowEnter
        'DISPLAYS COLUMN VALUE IN TEXTBOXES
        If e.RowIndex >= 0 Then
            Dim row As DataGridViewRow
            row = Me.dgvSchedule.Rows(e.RowIndex)
            txtID.Text = row.Cells("Patient_ID_Number").Value.ToString

            dtpDate.Text = row.Cells("Date_Time").Value 'THIS IS WHERE THE ERROR OCCUR

            txtFirstname.Text = row.Cells("Firstname").Value.ToString
            txtLastname.Text = row.Cells("Lastname").Value.ToString
            txtPhoneNumber.Text = row.Cells("Phone_Number").Value.ToString
        End If
    End Sub

Answer 1

您的 'Date_Time' 列的格式是什么？

如果它是这样的 MySQL 日期时间：2016-01-23 23:30:55 那么您可以使用 VB.NET

的 DateTime.Parse

Dim new_date As DateTime = DateTime.Parse("2016-01-23 23:30:55")
DateTimePicker1.Value = new_date

注意格式是'Custom'，自定义格式是dd/MM/yyyy h:mm tt

DateTimePicker1.Format = DateTimePickerFormat.Custom
DateTimePicker1.CustomFormat = "dd/MM/yyyy h:mm tt"

所以最终代码可能是：

 DateTimePicker1.Format = DateTimePickerFormat.Custom
 DateTimePicker1.CustomFormat = "dd/MM/yyyy h:mm tt"

 Dim new_date As DateTime = DateTime.Parse(row.Cells("Date_Time").Value.ToString())
 DateTimePicker1.Value = new_date

我还注意到您正在使用：

dtpDate.Text = row.Cells("Date_Time").Value

而不是

dtpDate.Value = row.Cells("Date_Time").Value

请注意，它们是不同的：Text 和 Value。

尝试将日期和时间数据从 DataGridView 播种到 DateTimePicker 时，字符串未被识别为有效的 DateTime 错误

String was not recognized as a valid DateTime Error when try to sow date and time data into DateTimePicker from DataGridView

vb.net

datetime

datetimepicker

sqlyog