Question

请有人可以提供帮助:(，我首先要结合日期和时间（例如：（DatetaskStart，TimetaskStart），（DatetaskEnd，TimetaskEnd））。

在我的dategridview中，我希望在获得的组合（任务开始的（日期，时间））和（结束任务的（日期，时间））之间进行减法，最后得到所有小时的总时间获得的任务。

 Dim sql As String = "select id_task, DatetaskStart ,TimetaskStart , DatetaskEnd ,TimetaskEnd from task where id_task = " & Textbox1.Text & " and  Datetask  Between '" & DateTimePicker1.Text & "' And '" & DateTimePicker2.Text & "';"
    command.CommandText = sql
    Dim Time_task as Double
    Dim total as Double
     Dim DateValue As Date
    Dim DateValue2 As Date
    connection.Open()
    Dim ds As New DataSet
    Dim SQLAdapter As New MySqlDataAdapter(sql, connStr)
    SQLAdapter.Fill(ds, "connectString")
    DataGridView1.DataSource = ds
    DataGridView1.DataMember = "connectString"
    DataGridView1.AutoResizeColumns()
    connection.Close()


 For Each row As DataGridViewRow In DataGridView1.Rows
            Time_task += (Date.TryParse(row.Cells(3).Value + " " + row.Cells(4).Value, DateValue)) - (Date.TryParse(row.Cells(1).Value + " " + row.Cells(2).Value, DateValue2))
        Next
        total = Time_task
        TextBox7.Text = total

Answer 1

你需要这样的东西;

    Dim TaskEnd As DateTime
    Dim TaskStart As DateTime
    Dim result As TimeSpan = TaskEnd - TaskStart
    MsgBox(result.TotalHours)

VB有一个TimeSpan，当你需要跟踪持续时间时，请使用它！

请下次，尽量不要拖入任何不相关的项目。这个问题与datagridview无关......它与日期和时间有关......

操纵DataGridView

1 个答案: