GridView loaded from Sqlserver Store Procedure with filter parameters

I'm evaluating the ASPxGridView. What I need to do is the following:
I have a Sqlserver store procedure which I'll use to populate the GridView. This SP take some 3 parameters which will be used in the WHERE clause (eg. field like '%' + @sParam + '%').
This SP will be used to create a DataTable Here is the function:
        protected DataTable GetData()
        {
            //CONNECTION STRING
            string sConnStr = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;
            //STORE PROCEDURE
            string sStrSP = "dbo.GetTable";
            //FILTER READING
            // THESE SHOULD BE FUNCTION PARAMETERS READ FROM THE FILTER TEXT FIELDS
            string sId = "";
            string sName = "";
            string sDescr = "";
            //SQLSERVER PARAMETER CONFIGURATION
            System.Data.SqlClient.SqlParameter[] sqlparams =
            {
            new System.Data.SqlClient.SqlParameter("@sId", sId),
            new System.Data.SqlClient.SqlParameter("@sName", sName),
            new System.Data.SqlClient.SqlParameter("@sDescr", sDescr),
            };
            //EXECUTION
            // DAL is a project I use to access the database
            System.Data.SqlClient.SqlDataReader rs = DAL.SqlHelper.ExecuteReader(sConnStr, System.Data.CommandType.StoredProcedure, sStrSP, sqlparams);
            //LOAD
            DataTable dt = new DataTable();
            dt.Columns.Add(new DataColumn("Id", typeof(string)));
            dt.Columns.Add(new DataColumn("Name", typeof(string)));
            dt.Columns.Add(new DataColumn("Descr", typeof(string)));
            if (rs.HasRows)
            {
                while (rs.Read())
                {
                    DataRow dr = dt.NewRow();
                    dr["Id"] = rs.GetString(0);
                    dr["Name"] = rs.GetString(1);
                    dr["Descr"] = rs.GetString(2);
                    dt.Rows.Add(dr);
                }
                rs.Close();
            }
            return dt;
        }
My ASPxGridView lool like this
        <dxwgv:ASPxGridView ID="gridView" ClientInstanceName="ClientGridView" runat="server"
            AutoGenerateColumns="False"
            Settings-ShowFilterRow="True"
            Settings-ShowFilterRowMenu="true"
            Width="100%"
            DataSource="<%# GetInfoList() %>"
            OnHtmlRowCreated="gridView_HtmlRowCreated"
            OnHtmlRowPrepared="gridView_HtmlRowPrepared">
            <Columns>
                <dxwgv:GridViewDataColumn FieldName="Id" Width="50px"></dxwgv:GridViewDataColumn>
                <dxwgv:GridViewDataColumn FieldName="Name" Width="150px"></dxwgv:GridViewDataColumn>
                <dxwgv:GridViewDataColumn FieldName="Descr"></dxwgv:GridViewDataColumn>
            </Columns>
            <Settings ShowVerticalScrollBar="true" UseFixedTableLayout="true" />
            <SettingsPager Mode="ShowAllRecords"></SettingsPager>
            <ClientSideEvents EndCallback="function (s, e) { ResizeGridHeight(); }" Init="function (s, e) { ResizeGridHeight(); }" />
        </dxwgv:ASPxGridView>
What I need is the following:
If all of the filter textboxes are empty I would like to load data with only the first 100 records (select top 100 …)
If some filter textbox has data, then I would like to requery the database (through my SP) using each non empty filter textbox as a parameter to the WHERE clause.
Is it possible to be done? If so, how?
Thanks for your time.
Mário Nunes