如何使用C＃改变基于条件的gridview单元格颜色 [英] How to change gridview cell color based on condition using C#

问题描述

我想根据条件改变grdiview单元格的颜色，条件是如果Passport即将在一个月内过期，或者它已经过期，所以我想检查两种情况是否会过期或如果它已经过期，那么我想把颜色改成红色。谢谢

  protected void OnRowDataBound_gvPass（object sender，GridViewRowEventArgs e）
 {
 DateTime todaysDate = DateTime.Now 。日期; 
 if（e.RowType == DataControlRowType.DataRow）
 {
 
 
 Label lblPassportExpDate =（Label）e.Row.FindControl（PassportExpDate） ; 
 DateTime PassportExpDateDate = DateTime.Parse（lblPassportExpDate.Text）; （PassportExpDateDate< DateTime.Today || PassportExpDateDate< todaysDate.AddDays（30））
 {
 //e.Row.BackColor = System.Drawing.Color.Red; 
 gvDriverStatus.Columns [3] .ItemStyle.ForeColor = System.Drawing.Color.Red; 
} 
 
} 
} 
  

解决方案

以下是一段简单的代码，可以帮助您适应您的情况：

  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; 
 
 
 
 
 
 $ p这是我得到的结果：
 
 
 
  
 
 
 
注意我使用了1996年7月15日硬编码的 refDate ，所以它对我本地数据库中的数据有意义。
 
 
 
编辑：我做了一个区间，就这样更有趣一些： 
 
 
  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）; （minDate< curDate&& curDate< maxDate）
 {
 e.Row.Cells [3] .BackColor = Color.Red; 
 e.Row.Cells [3] .ForeColor = Color.White; 
 
 
 
 code $ 
 $ p  
 
I want to change the color of the grdiview cell based on condition and the condition is that if Passport is about to expire with in one month or if it already expired so i want to check both condition if it is going to expire or if it already expired then i want to change the color into red.  thanks
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;
        }

      }
    }

解决方案
Here's a simplified piece of code that worked for me and you could easily adapt for your case:
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;
        }
    }
}
This is the result i get:



Note I'm using a hard coded refDate of 07/15/1996, so it makes sense with data in my local database.

EDIT: I made it an interval, just so is a little more interesting:
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;
        }
    }
}


                        
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