Access中更新一条数据，提示我标准表达式中，数据类型不匹配

这是我的一个函数，运行了一下，就提示数据类型不匹配，该如何解决啊 public int Update(Model.Question model) { StringBuilder strSql = new StringBuilder(); strSql.Append("UPDATE [Question] SET "); strSql.Append("Qid="+model.Qid+","); strSql.App

这是我的一个函数，运行了一下，就提示  数据类型不匹配，该如何解决啊

public int Update(Model.Question model)
  {
   StringBuilder strSql = new StringBuilder();
   strSql.Append("UPDATE [Question] SET ");
   strSql.Append("Qid="+model.Qid+",");
   strSql.Append("Qtitle=@in_Qtitle,");
   strSql.Append("Qcon=@in_Qcon,");
   strSql.Append("Qreply=@in_Qreply,");
            strSql.Append("Qtime=@in_Qtime,");
   strSql.Append("Qrtime=@in_Qrtime,");
   strSql.Append("Qname=@in_Qname,");
   strSql.Append("Qphone=@in_Qphone,");
   strSql.Append("lg="+model.lg+",");
            strSql.Append("Qview=@in_Qview");
   strSql.Append(" WHERE ID=" +model.ID);
   DbParameter[] cmdParms = {    
    ZDHelper.CreateInDbParameter("@in_Qtitle", DbType.String, model.Qtitle),
    ZDHelper.CreateInDbParameter("@in_Qcon", DbType.String, model.Qcon),
    ZDHelper.CreateInDbParameter("@in_Qreply", DbType.String, model.Qreply), 
       ZDHelper.CreateInDbParameter("@in_Qtime", DbType.DateTime, model.Qtime),
    ZDHelper.CreateInDbParameter("@in_Qrtime", DbType.DateTime, model.Qrtime),
    ZDHelper.CreateInDbParameter("@in_Qname", DbType.String, model.Qname),
    ZDHelper.CreateInDbParameter("@in_Qphone", DbType.String, model.Qphone),      
    ZDHelper.CreateInDbParameter("@in_Qview", DbType.Boolean, model.Qview)
                };

   return ZDHelper.ExecuteNonQuery(CommandType.Text, strSql.ToString(), cmdParms);
  }