private void Button1_Click(object sender, System.EventArgs e) 
        { 
            if(this.IsValid){ 
            OleDbConnection conn=dbconn.createconn(); 
                conn.Open(); 
                OleDbCommand cmd=new OleDbCommand(); 
                cmd.CommandText="insert into a(title,content)values('"+this.title.Text.Trim().Replace("'","")+"','"+this.content.Text.Trim().Replace("'","")+"')"; 
                cmd.Connection=conn; 
                try 
                { 
                    cmd.ExecuteNonQuery(); 
                    this.title.Text=""; 
                    this.content.Text=""; 
                    this.add_info.Text="提交成功"; 
                } 
                catch 
                { 
                    this.add_info.Text="出现错误"; 
                                    } 
                finally{ 
                conn.Close(); 
                } 
            } 
        }
