IF I'm having two textbox...
And I'm Having One DropdownListbox....
When I'm Selected From the DropdownlistBox ...
Then Corresponding details showed in that Textbox... Coding....
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd1 = new SqlCommand("select username,password from tbl_Login where username='"+DropDownList1.SelectedValue.ToString()+"'", con);
cmd1.CommandType = CommandType.Text;
SqlDataReader read;
read = cmd1.ExecuteReader();
read.Read();
TextBox1.Text = read.GetValue(0).ToString();
TextBox2.Text = read.GetValue(1).ToString();
read.Close();
con.Close();
}