/// <summary>
/// 更新一条数据
/// </summary>
public bool Update(cn.itcast.bookshop.Model.BookComment model)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("update BookComment set ");
strSql.Append("Msg=@Msg,");
strSql.Append("CreateDateTime=@CreateDateTime,");
strSql.Append("BookId=@BookId");
strSql.Append(" where Id=@Id");
SqlParameter[] parameters =
{
new SqlParameter("@Msg", SqlDbType.NVarChar, -1),
new SqlParameter("@CreateDateTime", SqlDbType.DateTime),
new SqlParameter("@BookId", SqlDbType.Int, 4),
new SqlParameter("@Id", SqlDbType.Int, 4)
};
parameters[0].Value = model.Msg;
parameters[1].Value = model.CreateDateTime;
parameters[2].Value = model.BookId;
parameters[3].Value = model.Id;
int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
if (rows > 0)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 增加一条数据
/// </summary>
public int Add(cn.itcast.bookshop.Model.BookComment model)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("insert into BookComment(");
strSql.Append("Msg,CreateDateTime,BookId)");
strSql.Append(" values (");
strSql.Append("@Msg,@CreateDateTime,@BookId)");
strSql.Append(";select @@IDENTITY");
SqlParameter[] parameters =
{
new SqlParameter("@Msg", SqlDbType.NVarChar, -1),
new SqlParameter("@CreateDateTime", SqlDbType.DateTime),
new SqlParameter("@BookId", SqlDbType.Int, 4)
};
parameters[0].Value = model.Msg;
parameters[1].Value = model.CreateDateTime;
parameters[2].Value = model.BookId;
object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters);
if (obj == null)
{
return(0);
}
else
{
return(Convert.ToInt32(obj));
}
}
/// <summary>
/// 得到一个对象实体
/// </summary>
public cn.itcast.bookshop.Model.BookComment DataRowToModel(DataRow row)
{
cn.itcast.bookshop.Model.BookComment model = new cn.itcast.bookshop.Model.BookComment();
if (row != null)
{
if (row["Id"] != null && row["Id"].ToString() != "")
{
model.Id = int.Parse(row["Id"].ToString());
}
if (row["Msg"] != null)
{
model.Msg = row["Msg"].ToString();
}
if (row["CreateDateTime"] != null && row["CreateDateTime"].ToString() != "")
{
model.CreateDateTime = DateTime.Parse(row["CreateDateTime"].ToString());
}
if (row["BookId"] != null && row["BookId"].ToString() != "")
{
model.BookId = int.Parse(row["BookId"].ToString());
}
}
return(model);
}
/// <summary>
/// 得到一个对象实体
/// </summary>
public cn.itcast.bookshop.Model.BookComment GetModel(int Id)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("select top 1 Id,Msg,CreateDateTime,BookId from BookComment ");
strSql.Append(" where Id=@Id");
SqlParameter[] parameters =
{
new SqlParameter("@Id", SqlDbType.Int, 4)
};
parameters[0].Value = Id;
cn.itcast.bookshop.Model.BookComment model = new cn.itcast.bookshop.Model.BookComment();
DataSet ds = DbHelperSQL.Query(strSql.ToString(), parameters);
if (ds.Tables[0].Rows.Count > 0)
{
return(DataRowToModel(ds.Tables[0].Rows[0]));
}
else
{
return(null);
}
}