Filter data from dropdown list ,Asp.net ,C#

Hai Techie

When i selects the date from dropdown list it will display in two text boxes.Based on two textboxes values grid view should display the filtered data .But the gridview does not visible

Here is the code

SqlConnection objcon = new SqlConnection("Data Source=.;Initial Catalog=Iwens_Database;User ID=sa;Password=123;Integrated Security=SSPI;");
objcon.Open();
try
{


selectionquery = "SELECT E_id, E_Name, E_Address, E_Contact_No, E_Email, DOEn, E_noi, E_coursename, E_year, E_companyname, E_others, E_design, E_Selected, E_Followup FROM dbo.Enquiry_table where DOEn between'" + FromTextBx.Text + "' AND '" +ToTextBx.Text + "'";


SqlDataAdapter objsda = new SqlDataAdapter(selectionquery,objcon );
DataSet objds = new DataSet();
objsda.Fill(objds, "Enquiry_table");

BetweenGridView.DataBind();
objcon.Close();
}
catch (Exception ex)
{
Response.Write(ex.Message);

}