data is not entering in database

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;

/// <summary>
/// Summary description for DAL
/// </summary>
public class DAL
{
    public static SqlConnection con;
    public static SqlCommand com;
    public static SqlDataAdapter ad;
    public static DataSet ds;
    public static int affectedRows;
    public static string strConnectionString;
	
    static DAL()
	{
        strConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["dbsFALancing"].ConnectionString;
        con = new SqlConnection(strConnectionString);
        com = new SqlCommand();
        com.Connection = con;
        ad = new SqlDataAdapter(com);
        affectedRows = -1;
	}

    public static void InsertUpdateDelete(string strQuery)
    {
        com.CommandText = strQuery;
        try
        {
            con.Open();
            affectedRows = com.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
        }
        finally
        {
            con.Close();
        }
    }

    public static DataSet SelectData(string strQuery)
    {
        ds = new DataSet();
        com.CommandText = strQuery;
        try
        {
            con.Open();
            ad.Fill(ds);
        }
        catch (Exception ex)
        {
        }
        finally
        {
            con.Close();
        }
        return ds;
    }
}

DAL.InsertUpdateDelete(@"insert into tblFrProject(PostedBy, CategoryID, Title, Detail, MaxBidAmount, OpeningDate, ClosingDate, PostedDate,  Requirements, Status)
        values(" + 2 + ", " + CategDropDownList.SelectedValue + ", '" + txtProjectName.Text + "','" + txtDes.Text + "','" + txtOpeningDate.Text + "','" + txtOpenDays.Text + "','" + DateTime.Now + "','" + RequirmentsTextBox.Text + "'," + receiveNotification.Checked.ToString() + "");