SQLDataReader中的列和行或任何替代方法中的引用数据

时间:2012-01-25 21:18:25

标签: c# asp.net sqldatasource sqldatareader

我正在运行存储过程,结果是这种格式

+------+--------+-----+-------+
|  ID  | Resign | Sum | Count |
+------+--------+-----+-------+
| 1234 |      0 | 400 |     3 |
| 1234 |      1 | 800 |     4 |
+------+--------+-----+-------+

我尝试使用此代码来引用查询返回的值,但它看起来不像我想要的那样工作

if (conn.State != ConnectionState.Open)
    conn.Open();
    SqlCommand sc = new SqlCommand();
    sc.CommandText = "usp_GetResignPool";
    sc.CommandType = CommandType.StoredProcedure;
    sc.Connection = conn;
    sc.Parameters.Add(AddParam(EndDate, "@EndDate"));
    sc.Parameters.Add(AddParam(am_id, "@id"));

    SqlDataReader reader;
    reader = sc.ExecuteReader();

 while (reader.Read())
            {
                if reader. // lost here
            }

我该怎么办呢? ↓

int resigned = 0, resign_count = 0, not_resigned = 0, notresign_count =0;

if (read["Resigned"] == 1)
{
    resigned = read["sum"];
    resign_count = read["count"];
}
else
{
    not_resigned = read["sum"];
    notresign_count = read["count"]; 
}           

使用SQLDataReader并不重要。

编辑:实名列

ID        Resigned    sum                    count
--------- ----------- ---------------------- -----------

3 个答案:

答案 0 :(得分:3)

它不起作用,因为您的表中没有名为"Resigned"的列,就像您使用SqlDataReader时一样。

编辑:我认为问题的根源在于您添加参数的方式。 AddParam()不是您要使用的方法。因此,您的结果集可能是空的。

....

SqlCommand sc = new SqlCommand(); 
sc.CommandText = "usp_GetResignPool"; 
sc.CommandType = CommandType.StoredProcedure; 
sc.Connection = conn; 
sc.Parameters.AddWithValue("@EndDate", EndDate);
sc.Parameters.AddWithValue("id", am_id);

SqlDataReader reader; 
reader = sc.ExecuteReader(); 

using (reader = sc.ExecuteReader())
{
    while (reader.Read())
    {
        if (Convert.ToInt32(read["Resign"]) == 1)   
        {   
            resigned = Convert.ToInt32(read["Sum"]);   
            resign_count = Convert.ToInt32(read["Count"]);   
        }   
        else   
        {   
            not_resigned = Convert.ToInt32(read["Sum"]);   
            notresign_count = Convert.ToInt32(read["Count"]);    
        } 
    }
}

注意我如何将元素指示器更改为"Resign"。这需要匹配数据集中返回的列。或者,您可以使用列号来实现此目的,如下所示:

        if (Convert.ToInt32(read[1]) == 1)   
        {   
            resigned = Convert.ToInt32(read[2]);   
            resign_count = read[3];   
        }   
        else   
        {   
            not_resigned = Convert.ToInt32(read[2]);   
            notresign_count = Convert.ToInt32(read[3]);    
        } 

另外,在每次迭代或while循环中保留我的内容,您将覆盖变量resignedresign_count或{{1} }和not_resigned

答案 1 :(得分:1)

这会有用吗?

int resign = 0;
int not_resign = 0;
int resign_count = 0;
int not_resign_count = 0;

while (reader.Read())
{   
    if (Convert.ToInt32(reader["Resigned"]) == 1)
    {
        resign = Convert.ToInt32(reader["Sum"]);        
        resign_count = Convert.ToInt32(reader["Count"]);        
    }
    else
    {
        not_resign = Convert.ToInt32(reader["Sum"]);        
        not_resign_count = Convert.ToInt32(reader["Count"]);        
    } 
}

答案 2 :(得分:0)

您可以从程序中发布查询吗? 列名是否真的是“Sum”和“Count”? 有保留字,也许您应该尝试使用“AS”并在投影中为这些列指定其他名称。