Database Values in Textbox based on combobox

Question

I'm trying to display some information in a textbox that relates to the data of the field selected in the combo box currently I have no errors except when I select a different name from the combo box the data in my textbox does not change and stays on a
random name/address selected from the database. Hope that makes sense, here is my code as I guess it will explain things better
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
// Create SQL String
string queryString = "SELECT * FROM tblDrs where fldSName= '" + comboBox1.Text + "'; ";
// Create the instances
OleDbDataReader dbReader;
OleDbConnection dbConnect;
OleDbCommand dbCommand;
// Call the instances
try
dbConnect = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source =New DrsReqForms_2k_2013-03-15.mdb");
dbCommand = new OleDbCommand("SELECT * FROM tblDrs", dbConnect);
dbConnect.Open();
dbReader = dbCommand.ExecuteReader();
while (dbReader.Read())
string sName = dbReader["fldGiven Names"].ToString();
string sAddress = dbReader["fldAdd1"].ToString();
txtInitials.Text = sName;
txtAddress.Text = sAddress;
catch (Exception ex)
MessageBox.Show(ex.Message);

Answer 1

I notice.
string queryString = "SELECT * FROM tblDrs where fldSName= '" + comboBox1.Text + "'; ";
and
dbCommand = new OleDbCommand("SELECT * FROM tblDrs", dbConnect);
Maybe that second one is there just because the first wasn't working or something.
I would think though that you will get a whole bunch of records and your reader will loop through every one.  Whichever is last is what you get to see and that could well be random.
That first line looks rather more like it'd work, but you're not using that at all.
Nothing really just jumps out at me other than that.
You should be doing the
Using( create connection)
 // use the connection
But that's a different sort of issue.
The thing I would do here is insert a break point and see what is happening.
This is a key skill for any developer - get used to working that way ASAP.
http://social.technet.microsoft.com/wiki/contents/articles/29181.msdn-forums-asking-questions.aspx#Debugging
Hope that helps.
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Thanks so much, this made total sense when I had another look at the code, it was indeed looping right to the end field until I removed the string and updated the command query.