Example 1: The first instance is a simple example. Datetime.Compare method compares two dates that are created as objects.
DateTime.Compare(date1,date2) : It is used to compare two dates. Method can return only 1, 0 or -1
If d1 is greater than d2 it returns 1
If d2 is greater than d1 it returns -1
if dates are equel to each other it returns 0
Here are the codes
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DateTime d1 = new DateTime(1990,01,01); DateTime d2 = new DateTime(2000, 01, 01); int result = DateTime.Compare(d1, d2); // (d2 > d2) it returns -1 Console.WriteLine(result); Console.ReadLine(); |
Example 2: Comparing two dates in the C# DataGridView
In this example shows us, how to compare two date in dataGridView using C# Windows Form Application.
Source Code:
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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace datagrid_1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { dataGridView1.ColumnCount = 3; dataGridView1.Columns[0].Name = "Date 1"; dataGridView1.Columns[1].Name = "Date 2"; dataGridView1.Columns[2].Name = "Comparison"; //dataGridView1.Columns[3].Name = "Time Span"; dataGridView1.Rows.Add("13.01.2018", "20.01.2018"); dataGridView1.Rows.Add("05.03.2018", "13.03.2018"); dataGridView1.Rows.Add("20.04.2018", "15.05.2018"); dataGridView1.Rows.Add("18.04.2018", "18.04.2018"); dataGridView1.Rows.Add("01.06.2018", "22.08.2018"); dataGridView1.Rows.Add("30.05.2018", "02.06.2017"); dataGridView1.Rows.Add("04.04.2018", "12.05.2018"); dataGridView1.Rows.Add("12.03.2018", "10.04.2018"); } private void button1_Click(object sender, EventArgs e) { DateTime d1; DateTime d2; for(int i=0;i<dataGridView1.RowCount-1;i++) { d1 = Convert.ToDateTime(dataGridView1.Rows[i].Cells[0].Value); d2 = Convert.ToDateTime(dataGridView1.Rows[i].Cells[1].Value); if(d1>d2) { dataGridView1.Rows[i].Cells[2].Value = "Date1 is greater than Date2."; } else if(d1==d2) { dataGridView1.Rows[i].Cells[2].Value = "Two dates are equal."; } else { dataGridView1.Rows[i].Cells[2].Value = "Date2 is greater than Date1."; } } } } } |
Output:
