search vb.net form using sqldatasource - search

Question

This is my first time creating a search form. I am trying to create a form currently with two fields to enter last and first name. When the button is clicked I would like to get results from the table. Sounds simple. I browsed the web but am not able to wrap my head around how to do it using sqldatasource. I am not able to connect how to trigger the query with the click of the button. I have this:
<asp:SqlDataSource ID="SearchPDS" runat="server" ConnectionString="<%$ ConnectionStrings:IDBConnectionString %>"
SelectCommand="SELECT * from [tblPatron] WHERE LName = #LName" >
<SelectParameters>
<asp:ControlParameter ControlID="txtLName" Name="LName" ConvertEmptyStringToNull="false" PropertyName="Text"/>
</SelectParameters>
</asp:SqlDataSource>
I am trying to display the results in a grid:
<asp:GridView ID="GridView1" runat="server" DataSourceID="SearchPDS" AutoGenerateColumns="true">
</asp:GridView>
Also I wrote code behind for the onclick event for the button:
Protected Sub BtnSearch_Click(sender As Object, e As EventArgs) Handles BtnSearch.Click
SearchPDS.SelectCommand = "Select * From tblPatron where LName = #LastName"
SearchPDS.SelectParameters.Add("LastName", txtLName.Text)
SearchPDS.DataBind()
GridView1.DataBind()
End Sub

Answer 1

I changed the sqlsource code to
<asp:SqlDataSource ID="SearchPDS" runat="server" ConnectionString="<%$ ConnectionStrings:IDBConnectionString %>"
SelectCommand="SELECT * from [tblPatron]">
</asp:SqlDataSource>
and running the query for the onclick event.
Protected Sub BtnSearch_Click(sender As Object, e As EventArgs) Handles BtnSearch.Click
Dim strSearch As String
strSearch = "SELECT * FROM tblPatron WHERE (LName Like '%" + txtLName.Text.ToString() + "%')"
strSearch = strSearch + "AND (FNAME Like '%" + txtFName.Text.ToString() + "%')"
SearchPDS.SelectCommand = strSearch
GridSearchResults.Visible = True
End Sub
This seems to be working fine. Is there any sleek way of doing the same job?
Thanks
~ Nita