我想确定 VB 中 2 个 "HH:mm:ss.fff" 值之间的差异

Question

我正在努力获取数据网格视图中两个单元格之间的准确值。这两个值都是 HH:mm:ss.fff 格式，但是当我尝试计算差异时，我无法在文本框中显示 .fff。我知道我需要以某种方式格式化，但我尝试的每一种方式都会出错。我的代码如下。我不想以任何方式显示日期或年份，单元格中的数据将始终带有 HH:mm:ss.fff.

提前致谢。使用 Visual Studio 2013

    Dim value2 As DateTime = DateTime.Parse(dgvConvert(3, 1).Value)
    'value is in "HH:mm:ss.fff" format i.e 08:01:05.900
    Dim value1 As DateTime = DateTime.Parse(dgvConvert(3, 2).Value)
    'value is in "HH:mm:ss.fff" format i.e 08:01:50.000

    Dim timespan2 As DateTime = DateTime.Parse(value2)
    Dim timespan1 As DateTime = DateTime.Parse(value1)

    Dim duration As TimeSpan = timespan1 - timespan2

    Dim duration1 As String = duration.ToString

    txtResult.Text = duration1.ToString
    'result is "00:00:05" but i am trying to get "00:00:05.900"
    'txtResult.Text = duration(format("HH:mm:ss.fff")) does not work.

这是我用来将 CSV 写入 DataGridView 的代码

    Private Sub btnLoadFileToConvert_Click(sender As Object, e As EventArgs) Handles btnLoadFileToConvert.Click
    ' MessageBox.Show("Make sure your file only contains numbers in the first coumn", "Check File")
    dgvConvert.Rows.Clear()
    Dim TextLine As String = ""
    Dim SplitLine() As String
    Dim fname As String = txtFileToConvert.Text
    If System.IO.File.Exists(fname) = True Then
        Dim objReader1 As New System.IO.StreamReader(fname)
        Do While objReader1.Peek() <> -1
            TextLine = objReader1.ReadLine()
            SplitLine = Split(TextLine, ",")
            Me.dgvConvert.Rows.Add(SplitLine)
        Loop
        objReader1.Close()
        objReader1.Dispose()
    Else
        MsgBox("File Does Not Exist")

    End If
    dgvConvert.RowCount = 6001

Answer 1

如果您的单元格始终包含时间值，您可以将它们解析为 TimeSpan structure。然后你可以从另一个中减去一个。

如果您想显示显示毫秒的值，您可以使用接受格式的 overload of .ToString（请注意，这与 DateTime 格式略有不同，因为某些字符需要转义。

    'values for debug
    Dim cell2Value = "08:01:05.900" 'dgvConvert(3, 1).Value.ToString
    Dim cell1Value = "08:01:50.000" 'dgvConvert(3, 2).Value.ToString

    Dim value2 = TimeSpan.Parse(cell2Value)
    Dim value1 = TimeSpan.Parse(cell1Value)

    TextBox1.Text = (value1 - value2).ToString("hh\:mm\:ss\.fff")

我想确定 VB 中 2 个 "HH:mm:ss.fff" 值之间的差异

I am looking to determine the difference between 2 "HH:mm:ss.fff" values in VB

.net

vb.net

datetime

parsing

timespan