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  • 在Gridview如何进行每行单元格比较

    有在论坛上看到一个问题,就是在Gridview控件中,需要对几个列的数值进行比较,原问题如下:

    先在数据库中准备数据:

    CREATE TABLE [dbo].[RecordTime]
    (
        Id INT IDENTITY(1,1) PRIMARY KEY,
        Time1 DATETIME,
        Time2 DATETIME,
        Time3 DATETIME,
        Time4 DATETIME
    )
    GO
    INSERT INTO [dbo].[RecordTime] VALUES ('2015-05-11 09:48','2015-05-20 10:08','2015-05-13 14:48','2015-05-19 08:48'),
                                          ('2015-05-10 14:48','2015-05-01 10:02','2015-05-20 12:48','2015-05-20 10:20'),
                                          ('2015-05-20 10:31','2015-05-03 10:40','2015-05-14 10:40','2015-05-25 09:48')
      GO
    
     CREATE PROCEDURE [dbo].[usp_RecordTime_GetAll]
     AS
        SELECT [Id],[Time1],[Time2],[Time3],[Time4] FROM [dbo].[RecordTime]
    GO
    View Code


    在aspx网页上写好GridView控件:

    然后可以在.aspx.cs代码页中实现OnRowDataBound="GridView1_RowDataBound"事件:


    .aspx.cs代码:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using Insus.NET;
    using System.Data;
    using System.Drawing;
    
    public partial class _Default : System.Web.UI.Page
    {
        RecordTime rt = new RecordTime();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                Data_Binding();
        }
    
        private void Data_Binding()
        {
            this.GridView1.DataSource = rt.GetRecordTime();
            this.GridView1.DataBind();
        }
    
        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType != DataControlRowType.DataRow) return;
    
            DataRowView drv = (DataRowView)e.Row.DataItem;
            List<DateTime> lDT = new List<DateTime>();
            lDT.Add(Convert.ToDateTime(drv["Time1"]));
            lDT.Add(Convert.ToDateTime(drv["Time2"]));
            lDT.Add(Convert.ToDateTime(drv["Time3"]));
            lDT.Add(Convert.ToDateTime(drv["Time4"]));
            DateTime dt = lDT.Max<DateTime>();
            int i = lDT.IndexOf(dt);
    
            int actualIdx = i + 1;
    
            e.Row.Cells[actualIdx].ForeColor = Color.FromName("red");
        }
    }
    View Code


    运行得到的效果:

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  • 原文地址:https://www.cnblogs.com/insus/p/4571432.html
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