How can I populate combobox of datagridview with data from database in c#

Question

1.00/5 (1 vote)

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C#

con = new SqlConnection(cs);
              con.Open();

              string ct = "select distinct RTRIM(faheads) from FA_Details ";

              cmd = new SqlCommand(ct);
              cmd.Connection = con;

              rdr = cmd.ExecuteReader();

              while (rdr.Read())
              {
                  // dataGridView1.Rows[0].Cells[2].Value.Add(rdr[0]);
                  DataGridViewComboBoxCell c =new DataGridViewComboBoxCell();
                  c.Items.Add(rdr[0]);
                  dataGridView1.Rows[0].Cells[2] = c;

              }
              con.Close();

but it showing only one value from database.

Posted 30-Jun-15 5:47am

Member 10899600

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Comments

[no name] 30-Jun-15 11:56am

Seeing that we do not have access to your database or your data, what is it exactly that you would expect us to be able to tell you based on this? Fix your query so that it returns the data you want.

2 solutions

Solution 2

Hello ,

suppose you have one datagridview and there one comboboxcolumn named as
cmbproduct and if you want to bind the combobox value from dataset then

<br />
<br />
 cmbproduct.DataSource = dsproduct.Tables[0].Columns[0].Table.DefaultView;<br />
 cmbproduct.ValueMember = "PId"; <br />
 cmbproduct.DisplayMember = "Pname";<br />

put this code where you want to load the combobox .

thanks
Animesh

Posted 30-Jun-15 6:30am

Animesh Datta

Comments

Richard Deeming 1-Jul-15 7:14am

You can simplify that data source to:
dsproduct.Tables[0].DefaultView

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Richard Deeming · Accepted Answer · 2015-06-30T06:23:00

For each record returned from the database, you're creating a new DataGridViewComboBoxCell, adding one item to it, and replacing the third cell of the first row with the new single-record combobox.

You need to move the cell creation and assignment outside of the while loop.

C#

const string query = "select distinct RTRIM(faheads) from FA_Details";

var c = new DataGridViewComboBoxCell();
dataGridView1.Rows[0].Cells[2] = c;

using (var con = new SqlConnection(cs))
using (var cmd = new SqlCommand(query, con))
{
    con.Open();
    
    using (var rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))
    {
        while (rdr.Read())
        {
            c.Items.Add(rdr[0]);
        }
    }
}