How to get column names of a table in sql database to combobox in C#

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Hello sir,
Am get stuck in accessing into combobox.How to get single column value into the combobox from MSSQL database after debugging.

Here i have used this code in C#:

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<br mode="hold" />

C#

SqlConnection con;
        SqlCommand com;
        SqlDataReader dr;
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            con.Open();
            con = new SqlConnection("Data Source=CBP\\SQLEXPRESS;Initial Catalog=ECG;Integrated Security=True");
            com = new SqlCommand("Select Device_name from Monitor_devices", con);
            //cmd.CommandType = CommandTypeText;
            dr=com.ExecuteReader();
            //int j = 0;
            //if (dr.HasRows)
            //{
                while (dr.Read())
                {
                    comboBox2.Items.Add(dr[0].ToString());
                    //j++;
                }
                dr.Close();
                con.Close(); 
               

        }

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Any one know about this ,plz do help..

Thanks,
Pradeep CBZ

Edit: Tags added

Posted 28-Mar-12 22:00pm

Pradeep CBZ

Updated 2-Oct-16 20:21pm

Nelek

v2

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OriginalGriff 29-Mar-12 4:13am

What is the problem?
What is it doing that is shouldn't, or not doing that it should?

Pradeep CBZ 29-Mar-12 4:23am

hello sir,
Nothing happening,over here.After executing or debugging the code,then if i click on the combobox then it is not retriving into combobox from SQL database column.How to achieve it.How to make it visible the dropdownlist or how to retrive.

Thanks
Pradeep

3 solutions

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nikki88 · Answer 1 · 2012-03-28T22:34:00

try

C#

comboBox2.Items.Add(dr[0].ToString());

to

C#

comboBox2.Items.Add(dr["Device_name"].ToString());

Also you do not need to have the code in a "comboBox2_SelectedIndexChanged" event, you an remove that event... see below

C#

SqlConnection con;
        SqlCommand com;
        SqlDataReader dr;

                        con = new SqlConnection("Data Source=CBP\\SQLEXPRESS;Initial Catalog=ECG;Integrated Security=True");
            com = new SqlCommand("Select Device_name from Monitor_devices", con);
            //cmd.CommandType = CommandTypeText;
                con.Open();

            dr=com.ExecuteReader();
            //int j = 0;
            //if (dr.HasRows)
            //{
                while (dr.Read())
                {
                    comboBox2.Items.Add(dr["Device_name"].ToString());
                    //j++;
                }
                dr.Close();
                con.Close();

Ali Majed HA · Answer 2 · 2016-10-02T20:21:00

Hello
I have used this code using Entity Framework :

C#

Public Class BankAccount
{
   Public List<ema.shopping.model.bank> GetBank();
   {
      using(ShoppingEntities _ShoppingEntities = new ShoppingEntities())
      {
          return _ShoppingEntities.Bank.ToList(); 
      }
   }
}
</ema.shopping.model.bank>

and for you Form Code Behind:

C#

class.BankAccount _BankAccount = new BankAccount();
BankIDCombobox.DisplayName = "Name";
BankIDCombobox.ValueMember = "BankID";
BankIDCombobox.DataSource = _BankAccount.GetBank();

hope it will solve your problem
best regards

Member 11817231 · Answer 3 · 2016-10-02T09:53:00

C#

SqlConnection con;
string dbConnectionString = @"Data Source=CBP\\SQLEXPRESS;Initial Catalog=ECG;Integrated Security=True";
string sqlTable = null;
con = new SqlConnection(dbConnectionString);
con.Open();

sqlTable = "Select Device_name from Monitor_devices";
SqlDataAdapter dscmd = new SqlDataAdapter(sqlTable, con);
DataSet ds = new DataSet();
dscmd.Fill(ds);
comboBoxColumn.DataSource = ds.Tables[0];
comboBoxColumn.DisplayMember = "Device_name";
con.Close();

How to get column names of a table in sql database to combobox in C#

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