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I have datagridview(dgv) in windows form application I need to set its back color to white in one method and i did it ,I cheked in debugging the expected row color changed but not showing in dgv ,what could be the reason behind this?

here is the code,

What I have tried:

//////Row color changing here///////

        public void _timer_Tick(object sender, EventArgs e)
        {
            try
            {
                if (flagwithoutprocess == true)
                {
                    Appendlblmflash("Indent Discarded , send another indent");
                 
                    foreach (DataGridViewRow row in dataGridView1.Rows)
                    {
                        if (row.Index == indexxbox)
                        {
                            for (int i = 0; i <= row.Cells.Count - 1; i++)
                            {
                                row.Cells[i].Style.BackColor = Color.White;
                            }
                        }
                    }
                    flagwithoutprocess = false;
                }
             }
    }

////event where traced colors and change as expected///


private void dataGridView1_CellContentClick(object sender,DataGridViewCellEventArgs e)
        {
            try
            {
                var senderGrid = (DataGridView)sender;

                ///summary///
                ///for checkbox column///
                
                if (senderGrid.Columns[e.ColumnIndex] is DataGridViewCheckBoxColumn && e.RowIndex >= 0)
                {

                  indexxbox = e.RowIndex;

                  foreach (DataGridViewRow row in dataGridView1.Rows)
                  {
                     
                      if (row.DefaultCellStyle.BackColor == Color.Aqua)
                      {
                          row.DefaultCellStyle.BackColor = Color.Aqua;
                      }
                      
                      row.Cells[SerialNo.Name].Value = false;
                  }

                       if (dataGridView1.CurrentCell is DataGridViewCheckBoxCell)
                       {
                           
                           //Below code for getting checked value of checkbox
                           bool isChecked = (bool)dataGridView1[e.ColumnIndex, e.RowIndex].EditedFormattedValue;

                           // Checking value of checkbox
                           if (isChecked == true)
                           {
                               data = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
                               fm = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
                               to = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();
                              
                               //changing color of selected row
                               var r = this.dataGridView1.Rows[e.RowIndex];

                              r.DefaultCellStyle.BackColor = Color.Aqua;
                           }
                        
                           ifile.IniWriteValue("Config Section", "INDENT_NO", data);
                           txtindentcode.Text = data;
                       }
                }
            }
       }



EDITED SOLUTION :

by changing code as follows timer event is same as above changes is in only dgv event,

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
try
{
var senderGrid = (DataGridView)sender;

///summary///
///for checkbox column///

if (senderGrid.Columns[e.ColumnIndex] is DataGridViewCheckBoxColumn && e.RowIndex >= 0)
{
indexxbox = e.RowIndex;

foreach (DataGridViewRow row in dataGridView1.Rows)
{
for (int k = 0; k <= row.Cells.Count - 1; k++)
{
if (row.Cells[k].Style.BackColor == Color.Aqua)
{
for (int n = 0; n <= row.Cells.Count - 1; n++)
{
row.Cells[n].Style.BackColor = Color.White;
}
}
}
row.Cells[SerialNo.Name].Value = false;
}

if (dataGridView1.CurrentCell is DataGridViewCheckBoxCell)
{
bool isChecked = (bool)dataGridView1[e.ColumnIndex, e.RowIndex].EditedFormattedValue;

// Checking value of checkbox

if (isChecked == true)
{
data = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
fm = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
to = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();

//changing color of selected row
var r = this.dataGridView1.Rows[e.RowIndex];

for (int n = 0; n <= r.Cells.Count - 1; n++)
{
r.Cells[n].Style.BackColor = Color.Aqua;
}

}
//Below code for getting checked value of checkbox

ifile.IniWriteValue("Config Section", "INDENT_NO", data);
txtindentcode.Text = data;
}

}

///summary///
///for button column///

if (senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn && e.RowIndex >= 0)
{
string msg = "Alert";
string cap = "Do you want to send indent to device?";
DialogResult dlgg = MessageBox.Show(cap, msg, MessageBoxButtons.YesNo, MessageBoxIcon.Question);

if (dlgg == DialogResult.Yes)
{
if (mode == 0)
{
if (lblmflash.Text != "Device processing... please don't send indent")
{
indexxbutton = e.RowIndex;

if (indexxbutton == indexxbox)
{
if (flagwithoutprocess == false)
{
if (networkStream != null)
{
isButtonClicked = true;

indata = ifile.IniReadValue("Config Section", "INDENT_NO");

if (isButtonClicked == true)
{
string query = " SELECT item_code ,required_quantity " +
" FROM vw_DSInfo_indent_details " +
" WHERE indent_no = @ind " +
" AND indent_status like 'Approved' " +
" AND pending_qty not like '0%' ;";

cmd = new MySqlCommand();
cmd.CommandText = query;
cmd.CommandType = CommandType.Text;
cmd.Parameters.Add(new MySqlParameter("ind", indata));
cmd.Connection = con;
table = new DataTable();
adapter = new MySqlDataAdapter(cmd);
adapter.Fill(table);

if (table.Rows.Count > 0)
{
List<string> code = new List<string>();
int h = 1;

foreach (DataRow row in table.Rows)
{
string itemcode = row["item_code"].ToString();
string[] reqqty = row["required_quantity"].ToString().Split('.');

code.Add(itemcode + "," + reqqty[0] + ",&*");

if (h == 200 || h == 400 || h == 600 || h == 800 || h == 1000 || h == 1200 || h == 1400)
{
code.Add("`");
}
h++;
}

string onestr = string.Join("", code);
byte[] garbage = Encoding.ASCII.GetBytes("aaaaa");
networkStream.Write(garbage, 0, garbage.Length);

Thread.Sleep(500);

byte[] request = Encoding.ASCII.GetBytes("INDENT_REQ");
networkStream.Write(request, 0, request.Length);

byte[] fulldata = Encoding.ASCII.GetBytes(onestr);
networkStream.Write(fulldata, 0, fulldata.Length);

hash = Encoding.ASCII.GetBytes("#");
networkStream.Write(hash, 0, hash.Length);

ifile.IniWriteValue("Config Section", "INDENT_NO", "");

Appendlblmflash("");

foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (Convert.ToBoolean(row.Cells[SerialNo.Name].Value) == true)
{
for (int i = 0; i <= row.Cells.Count - 1; i++)
{
row.Cells[i].Style.BackColor = Color.LightSalmon;
}
}
row.Cells[SerialNo.Name].Value = false;
}

}

else
{
unscr = Encoding.ASCII.GetBytes("%");
networkStream.Write(unscr, 0, unscr.Length);
hash = Encoding.ASCII.GetBytes("#");
networkStream.Write(hash, 0, hash.Length);
string mmsg = "Alert";
string caption = "No items present for this Indent";
MessageBox.Show(caption, mmsg, MessageBoxButtons.OK, MessageBoxIcon.Warning);

foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (Convert.ToBoolean(row.Cells[SerialNo.Name].Value) == true)
{
for (int i = 0; i <= row.Cells.Count - 1; i++)
{
row.Cells[i].Style.BackColor = Color.LightSalmon;
}
}

row.Cells[SerialNo.Name].Value = false;
}

ifile.IniWriteValue("Config Section", "INDENT_NO", "");
}
}
else // isbuttonclick else
{ }
}

else // network stream else
{
string mess = "Connection Status";
string caption = "Device not connected! Connect Device properly.";
MessageBox.Show(caption, mess, MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
}
}
else { } // flag withoutprocess
}
else // indexx not match else
{
//clicked cha ahe jithe sangach ahe wrong button clicked ahe mnun
string mess = "Process Alert";
string caption = "Wrong Button Pressed! Please Press selected row Button";
MessageBox.Show(caption, mess, MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);

}
// indexxbox = indexxbutton = 0;
}
else
{
string mess = "Process Alert";
string caption = "Device is processing, send indent after some time.";
MessageBox.Show(caption, mess, MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
}
}
else /// else part of indent mode and direct mode
{
string mess = "Process Alert";
string caption = "Device in Direct Transfer mode, Send indent when in Indent Transfer Mode";
MessageBox.Show(caption, mess, MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
}
}
}
}
catch
{}
}
Posted
Updated 24-Feb-16 20:32pm
v4
Comments
CHill60 24-Feb-16 10:03am
   
You've shown us some badly formatted code that apparently works. Are you expecting the rows to be White or Aqua? Have you tried putting breakpoints on the code to check the flow matches your expectations?
Member 11543226 25-Feb-16 0:43am
   
I have tried by putting breaks it founds aqua color of expected row but not showing . and one thing i noticed that "row.DefaultCellStyle.BackColor" this line couldnt works in another method other than dgv events hence i change color in timer cell by cell . but if i do coloring row cell by cell in dgv event gives wrong result.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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