这是一个关于SQLLITE的问题

public partial class Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

    }

    protected void BtnLogin_Click(object sender, EventArgs e)
    {
        if (Session["User"] == null)
        {
            string connectionstr ="Data Source=F：\\网络编程.s3db";
            SQLiteConnection connection = new SQLiteConnection(connectionstr);
            connection.Open();

            SQLiteCommand command = new SQLiteCommand();
            command.Connection = connection;
            command.CommandText = String.Format(
                    "select count(*) from login where user='{0}' and  password='{1}'",
                    this.TxtUsername.Text, this.TxtPassword.Text);

            int count = (int)command.ExecuteScalar();

            if (count > 0)     //数据库查询用户
            {
                Session["User"] = this.TxtUsername.Text.ToString();
                Response.Redirect("bug.aspx");
                Response.Write("<script language=javascript>登录成功</script>");
            }
            else
                Response.Write("<script language=javascript>账号或者密码错误</script>");

            connection.Close();

        }
        else
        {
            Application["count"] = Convert.ToInt32(Application["count"]) + 1;
            Response.Redirect("BuyCellphone.aspx");
        }
    }
}






















    ![图片说明](https://img-ask.****.net/upload/201906/09/1560079594_828565.png)

这个问题怎么解决，F：\网络编程.s3db是sqllite数据库路径