两个日期的差异出错了

Question

我将根据今天任务的天数更改gridview的行颜色。但它没有用 date1是今天的日期 和date2是任务的截止日期。

当我点击列标题进行排序时，行会改变颜色

Protected Sub GridView6_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)
    Dim date1 As Date
    date1 = Date.Now

    Dim date2 As Date

    For Each row As GridViewRow In GridView6.Rows
        Dim ddate As Label = CType(row.FindControl("label1"), Label)
        date2 = Date.Parse(ddate.Text)

        Dim ts As TimeSpan = date2.Subtract(date1)
        Dim days As Integer = ts.TotalDays



        If days <= 14 Then
            e.Row.ForeColor = System.Drawing.Color.Red
        ElseIf days > 14 And ts.Days < 30 Then
            e.Row.ForeColor = System.Drawing.Color.Blue
        ElseIf days >= 30 Then
            e.Row.ForeColor = System.Drawing.Color.LightGreen
        End If



    Next
End Sub

Answer 1

花了一段时间，但最终我发现了它。

你循环遍历每一行，然后只更新一个数据绑定！

摆脱grid.Rows中的foreach行，只需处理e.Row中的行。

您的代码应为：

Protected Sub GridView6_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)     
  Dim date1 As Date     
  date1 = Date.Now      
  Dim date2 As Date      

  Dim ddate As Label = CType(e.Row.FindControl("label1"), Label)         
  date2 = Date.Parse(ddate.Text)          
  Dim ts As TimeSpan = date2.Subtract(date1)         
  Dim days As Integer = ts.TotalDays            
  If days <= 14 Then             
    e.Row.ForeColor = System.Drawing.Color.Red         
  ElseIf days > 14 And ts.Days < 30 Then 
    e.Row.ForeColor = System.Drawing.Color.Blue         
  ElseIf days >= 30 Then 
    e.Row.ForeColor = System.Drawing.Color.LightGreen         
End If         
End Sub

Answer 2

您可能需要TotalDays中的TimeSpan。

Answer 3

替换

date1 = Date.Now

与

date1 = Date.Now.Date

Date.Now也包含时间部分。从上下文来看，您只对日期差异感兴趣，而不考虑时间。