textbox value changed according to combobox value changed from sql. in winform

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textbox value changed according to combobox value changed from sql.

Sql vales are :

mid    descr	       PSupervisor
      1	   Abhijeet           Anant Gaikar
      2	   Abhimanyu     	Anant

i have used below code but not working ,

in textbox its show me a full query.

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
txtPsupervisor.Text = "select psupervisor from Master.OringOperator where descr ='" + comboBox1.SelectedValue.ToString() + "'";

}

pls chnges in code

thnks in advance.

Posted 7-Aug-13 0:19am

Master Vinu

Updated 7-Aug-13 0:21am

v2

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[no name] 7-Aug-13 6:29am

"but not working", on the contrary. The code is working and doing exactly what you told it to do. If you actually want to get data from a database, you need to connect to whatever database you are using, execute the query and then do whatever it is you want to do with the data.

Master Vinu 7-Aug-13 6:36am

i hv create the coonection on top of the page ...plese chnged in code to know ...yhx in advance sir

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Master Vinu · Answer 1 · 2013-08-07T01:16:00

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (objConn1.State != ConnectionState.Open)
{
objConn1.Open();
}

SqlCommand cm = new SqlCommand ( "select psupervisor from Master.OringOperator where descr ='" + comboBox1.SelectedValue.ToString() + "'",objConn1);

SqlDataReader dr = cm.ExecuteReader();
if (dr.Read())
{
txtPsupervisor.Text = Convert.ToString(dr["psupervisor"]); ;
}
objConn1.Close();

}