Calculation mistake in datagridview in C#

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i Have Two DataGridView in WinForm, in WinForm My Data Transfer From DataGridView1 To DataGridView2 By Check Box.
i Have Problem in Calculation "RemaningDays"

This Data Show in DataGridView2, Calculation Not Work Properly,in DataGridView2 only First Row Calculate Correctly and Remain Row Only Repeat First Row Calculation

Result Show

LastDay	     --------            Today----	          RemaningDays
16/5/2020	-----        4/5/2020  ----       	12
16/6/2020	     -----   4/5/2020	----            12
16/7/2020	      -----  4/5/2020	----            12

if i Remove First Row Then Result Show

LastDay	    --------     Today	  ----  RemaningDays
16/6/2020	-----4/5/2020	----  43
16/7/2020	-----4/5/2020	----  43

Please Help me Solve This Problem

What I have tried:

My Code

C#

foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                DateTime dt3 = Convert.ToDateTime(dataGridView2.CurrentRow.Cells["Today"].Value);
                DateTime dt1 = Convert.ToDateTime(dataGridView2.CurrentRow.Cells["LastDate"].Value);
                int s12 = (dt1 - dt3).Days;
                
                
                row.Cells["RemaningDays"].Value = s12;

                dataGridView2.Columns["LastDate"].ReadOnly = true;
                dataGridView2.Columns["Today"].ReadOnly = true;
		dataGridView2.Columns["RemaningDays"].ReadOnly = true;
                
            }

Posted 3-May-20 20:58pm

Amar chand123

Updated 3-May-20 21:09pm

Patrice T

v4

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phil.o · Accepted Answer · 2020-05-03T21:10:00

Solution 1

You are not using the row variable:

C#

foreach (DataGridViewRow row in dataGridView2.Rows)
{            
   DateTime dt3 = DateTime.Parse(row.Cells["Today"].Value);
   DateTime dt1 = DateTime.Parse(row.Cells["LastDate"].Value);
   int s12 = (dt1 - dt3).Days;
                
   row.Cells["RemaningDays"].Value = s12;

   // ...
}

Posted 3-May-20 21:10pm

phil.o

Comments

Amar chand123 4-May-20 3:12am

Thank You Sir

phil.o 4-May-20 3:28am

You're welcome.

RickZeeland · Accepted Answer · 2020-05-03T21:10:00

Solution 2

Instead of dataGridView2.CurrentRow.Cells use: row.Cells

Posted 3-May-20 21:10pm

RickZeeland

Comments

Amar chand123 4-May-20 3:13am

Thank You Sir