Load data Oracle Table to C# combobox using Oledb

问题

hello i have create a table buy_unit in oracle database

CREATE TABLE buy_unit( unit_id NUMBER(10) not null PRIMARY KEY, unit_name VARCHAR2(10) not null );

and insert Values

INSERT INTO BUY_UNIT values(001,'Liter'); desc SELL_BUY_UNIT;

then create a combo box combobox1 in C# now can load buy_unit table data in combobox ? i have use the connection:

OleDbConnection con = new OleDbConnection("Provider=MSDAORA;Data Source=XE;User ID=user1;password=pssword");

回答1:

Well, you can see below code which is refering SQLConnection. You can change as per your DB may be OracleConnection or so. While using SQL, we have pass connection string with UID and PWD.

For Oracle have connection string as

string con = "Data Source=(DESCRIPTION =(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST = 000.00.0.00)(PORT = 0000)))(CONNECT_DATA =(SERVICE_NAME = database)));User ID=User/Schema;Password=password;Unicode=True";

public void BindComboBox()
{
    SqlConnection con = new SqlConnection(@"server=ServerName; database = DBName ;  User Id=sa; Password=PeaTeaCee5#");
    con.Open();
    string strCmd = "select desire column from table";
    SqlCommand cmd = new SqlCommand(strCmd, con);
    SqlDataAdapter da = new SqlDataAdapter(strCmd, con);
    DataSet ds = new DataSet();
    da.Fill(ds);
    cmd.ExecuteNonQuery();
    con.Close();

    cbSupportID.DisplayMember = "name to display";
    cbSupportID.ValueMember = "id";       
    cbSupportID.DataSource = ds;

    cbSupportID.Enabled = true;

}

and try to use using block when you open DB connection as below

using (OracleConnection objConn = new OracleConnection(con))
 {
   \\ you code
   \\ do your stuff
 }

Code for Oracle. Excuse for syntax.

public  void  Fillcombo()
        {
            string oradb = " Data Source=xe;User Id=dbname;Password=pws; ";
            string query = "select id , name from table";
            OracleConnection condatabase = new OracleConnection(oradb);
            OracleCommand cmddatabase = new OracleCommand(query, condatabase);

            try
            {
                condatabase.Open();
                OracleDataReader myReader = cmddatabase.ExecuteReader(); ;
                myReader = cmddatabase.ExecuteReader();
                while (myReader.Read())
                {
                    string sname = myReader.GetInt32(0).ToString();
                    comboBox1.Items.Add(sname.ToString());
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

来源：https://stackoverflow.com/questions/45028694/load-data-oracle-table-to-c-sharp-combobox-using-oledb

标签

sql

oracle11g

combobox

oledbconnection