searching in populated GridView using Select statements - asp.net

Question

I have a gridview on my webpage that binds from an excel sheet using OleDb
Now I'm trying to set it up so that people can search just by typing a word in the textbox, and then after button click, it'd filter all the results that have the same word in any column
I was advised to use this code:
protected void Button1_Click(object sender, EventArgs e)
{
string search = TextBox1.Text;
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
OleDbCommand cmd = new OleDbCommand("SELECT * FROM [Sheet1$]", conn);
OleDbDataAdapter da = new OleDbDataAdapter();
da.SelectCommand = cmd;
DataTable dt = new DataTable();
da.Fill(dt);
grvCarProof.DataSource = dt.Select("CP number = ");
grvCarProof.DataBind();
}
what I can't figure out is what kind of writing should go in my SelectCommand(). Am i on the right track

Answer 1

Use DataView and its RowFilter property.
DataView dv=dt.DefaultView;
dv.RowFilter="[Cp Number]='value']";
grvCarProof.DataSource = dv;
grvCarProof.DataBind();
Or add WHERE clause,
OleDbCommand cmd = new OleDbCommand("SELECT * FROM [Sheet1$] where [column1]=#col1", conn);
cmd.Parameters.AddWithValue("#col1",inputValueFromUser);
OleDbDataAdapter da = new OleDbDataAdapter();
da.SelectCommand = cmd;
DataTable dt = new DataTable();
da.Fill(dt);
grvCarProof.DataSource = dt;
grvCarProof.DataBind();