I'm working on a simple contact database style program I am using button click event to start an event that pulls an adjacent text box text and queries it however i can't seem to figure out how to update the DGV. here is what i have.

private void searchButton_Click_1(object sender, EventArgs e)
        {

            string connString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\clients.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
           SqlConnection conn = new SqlConnection(connString);
           string searchQuery;
            searchQuery = "select * from clients where [lastname] like'" + searchTB.Text + "%'";
            try
            {

                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = new SqlCommand(searchQuery, conn);

Want to update it here!

        }
        catch
        {
            MessageBox.Show("error" + e);
        }
    }

i have tried various snippets of code and i Am sure its a simple solution however i can't seem to find it

From all the examples i have seen this is the best i could come up with

[INDENT]try[/INDENT]
            {
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = new SqlCommand(searchQuery, conn);
                DataSet ds = new DataSet();
                conn.Open();
                //da.Fill(ds);
                //dataGridView1.DataSource = ds;
            }
            catch
            {
                MessageBox.Show("error" + e);
            }

the two commented lines throw the exception but I'm not sure why.

From all the examples i have seen this is the best i could come up with

[INDENT]try[/INDENT]
            {
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = new SqlCommand(searchQuery, conn);
                DataSet ds = new DataSet();
                conn.Open();
                //da.Fill(ds);
                //dataGridView1.DataSource = ds;
            }
            catch
            {
                MessageBox.Show("error" + e);
            }

the two commented lines throw the exception but I'm not sure why.

Well I don't know why they throw errors (look fine to me) but I always added one more line of code.

[INDENT]try[/INDENT]
            {
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = new SqlCommand(searchQuery, conn);
                DataSet ds = new DataSet();
                conn.Open();
                //da.Fill(ds);
                //dataGridView1.DataSource = ds;
[INDENT]dataGridView1.DataBind();[/INDENT]

            }
            catch
            {
                MessageBox.Show("error" + e);
            }

i guess it could be that I'm missing a reference

i am currently using

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.Sql;

Well you references look good. Have you personally tried the code alostdruid posted? If so did you get errors on the two lines that he commented?