Changing a column in a datagridview to a different color

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I have a C# application that displays a data grid view. The data grid view
has a Debit column and a Credit column. I want to change the background colors of the Debit and Credit columns. Here is the code:

What I have tried:

dgvCheckRegister.Columns["Debit"].DefaultCellStyle.BackColor = Color.LightPink;
dgvCheckRegister.Columns["Credit"].DefaultCellStyle.BackColor = Color.LightGreen;

It works except every other column does not get change. What is wrong
with my code? Thank in advance.

Posted 10-Feb-24 12:43pm

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PIEBALDconsult 10-Feb-24 20:57pm

Every other column? Or every other row?

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OriginalGriff · Answer 1 · 2024-02-10T19:30:00

If I try your code in my test app:

C#

DataTable dt = new DataTable();
string strConnect = SMDBSupport.SMInstanceStorage.GetInstanceConnectionString("VideoMaster");
using (SqlConnection con = new SqlConnection(strConnect))
    {
    try
        {
        con.Open();
        SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Videos", con);
        da.Fill(dt);
        MyDataGridView.DataSource = dt;
        }
    catch (Exception ex)
        {
        Debug.WriteLine(ex.ToString());
        }
    }
MyDataGridView.Columns[1].DefaultCellStyle.BackColor = Color.LightPink;
MyDataGridView.Columns[2].DefaultCellStyle.BackColor = Color.LightGreen;

I get what I expected: the second column has a pink background and the third has a green.

So you need to look at exactly what you see on your screen - which we can't look at - and also at the rest of your code to see what it is doing to your DGV.