更新多个表

时间:2013-05-16 07:11:14

标签: c# asp.net

我有2个表,即个人资料和信息。

我的桌子看起来像这样:

PROFILE

| p_Id | FirstName | LastName |

| 1    | Jack      | Cole     | 
| 2    | Cynthia   | Cole     | 
| 3    | Robert    | Cole     |  

INFO

| I_Id | childsID | fathersID | mothersID | Country |

| 1    | 1        | 3         | 2         | USA     |

我通过在文本框中显示这些表来检索这些值,我的选择查询是:

SELECT p.p_Id, p.FirstName, p.LastName, i.*, 
(SELECT pp.FirstName+' '+pp.LastName FROM Profile pp WHERE pp.p_Id=i.childsID) AS child,
(SELECT pp.FirstName+' '+pp.LastName FROM Profile pp WHERE pp.p_Id=i.fathersID) AS father,
(SELECT pp.FirstName+' '+pp.LastName FROM Profile pp WHERE pp.p_Id=i.mothersID) AS mother
    FROM Info i
        INNER JOIN Profile p
            ON p.p_Id=i.childsID

选择没问题,我能够在文本框上显示值,但问题是,我无法更新它们,到目前为止我已尝试过:

using (SqlCommand cmd = con.CreateCommand())
    {
        con.Open();
        cmd.CommandText = @"UPDATE Profile SET FirstName=@fname, LastName=@lname WHERE p_Id = @pid;
                            UPDATE Info SET childsID=@child, fathersID=@father, mothersID=@mother, Country=@country WHERE I_Id = @iid;";

        cmd.Parameters.Add(new SqlParameter("@fname", txtfname.Text));
        cmd.Parameters.Add(new SqlParameter("@lname", txtlname.Text));
        cmd.Parameters.Add(new SqlParameter("@child", txtchild.Text));
        cmd.Parameters.Add(new SqlParameter("@father", txtfather.Text));
        cmd.Parameters.Add(new SqlParameter("@mother", txtmother.Text));
        cmd.Parameters.Add(new SqlParameter("@country", txtcountry.Text));
        cmd.Parameters.Add(new SqlParameter("@pid", txtpid.Text));
        cmd.Parameters.Add(new SqlParameter("@iid", txtiid.Text));
        cmd.ExecuteNonQuery();
        Response.Write("alert('DATA UPDATED')");
    }

我正在使用c#和Asp.net 在此先感谢:)上帝保佑

1 个答案:

答案 0 :(得分:0)

检查MSDN:SqlParameter Constructor (String, Object)

  

在value参数中指定Object时,将从Object .NET的Microsoft .NET Framework类型推断出SqlDbType。

因此,当您传递int类型参数时,需要将文本值转换为整数:

cmd.Parameters.Add(new SqlParameter("@pid", int.Parse(txtpid.Text)));

或更好:

int tempIntValue;
cmd.Parameters.Add(new SqlParameter("@pid", int.TryParse(txtpid.Text, out tempIntValue)?
  (object)intTempValue: (object)DbNull.Value ));