c# - 如何使用 C# 根据条件更改 gridview 单元格颜色

Question

我想根据条件更改 grdiview 单元格的颜色，条件是如果 Passport 将在一个月内过期或已经过期，所以我想检查这两个条件是否即将过期或如果它已经过期，那么我想将颜色更改为红色。谢谢

protected void OnRowDataBound_gvPass(object sender, GridViewRowEventArgs e)
    {
      DateTime todaysDate = DateTime.Now.Date;
      if (e.Row.RowType == DataControlRowType.DataRow)
      {


        Label lblPassportExpDate = (Label)e.Row.FindControl("PassportExpDate");
        DateTime PassportExpDateDate = DateTime.Parse(lblPassportExpDate.Text);
        if (PassportExpDateDate < DateTime.Today || PassportExpDateDate < todaysDate.AddDays(30))
        {
          //e.Row.BackColor = System.Drawing.Color.Red;
          gvDriverStatus.Columns[3].ItemStyle.ForeColor = System.Drawing.Color.Red;
        }

      }
    }

Answer 1

这是一段对我有用的简化代码，您可以轻松地适应您的情况:

protected void Page_Load(object sender, EventArgs e)
{
    refDate = new DateTime(1996, 7, 15);
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowIndex >= 0)
    {
        if (DateTime.Parse(e.Row.Cells[3].Text) < refDate)
        {
            e.Row.Cells[3].BackColor = Color.Red;
        }
    }
}

这是我得到的结果:

请注意，我使用的是 07/15/1996 的硬编码 refDate，因此它对我本地数据库中的数据有意义。

编辑:我把它设为一个间隔，这样更有趣一点:

protected void Page_Load(object sender, EventArgs e)
{
    minDate = new DateTime(1996, 7, 7);
    maxDate = new DateTime(1996, 7, 15);
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowIndex >= 0)
    {
        var curDate = DateTime.Parse(e.Row.Cells[3].Text);

        if (minDate < curDate && curDate < maxDate)
        {
            e.Row.Cells[3].BackColor = Color.Red;
            e.Row.Cells[3].ForeColor = Color.White;
        }
    }
}