查询的结果插入到数组/列表中,区分为2列。? [英] the result of the query inserted in an array/list with distinction of 2 columns.?
本文介绍了查询的结果插入到数组/列表中,区分为2列。?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
前。
A 01/01/2011
B 01/01/2011
C 01/01/2011
D 01/01/2011
A 01/02/2011
B 01/02/2011
D 01 / 02/2011
A 01/03/2011
D 01/03/2011
该查询计划使用?
SELECT DISTINCT字母,dateReceive FROM
数据库
按字母排序
使用List< string>
我们的预期输出
[{A,B,C,D},{A,B,D},{A,D}
ex.
A 01/01/2011
B 01/01/2011
C 01/01/2011
D 01/01/2011
A 01/02/2011
B 01/02/2011
D 01/02/2011
A 01/03/2011
D 01/03/2011
The query were planning to use ?
SELECT DISTINCT Alphabets, dateReceive FROM
database
ORDER BY Alphabets
using List<string>
Our expected output
[{A,B,C,D},{A,B,D},{A,D}
using (var conn = new SqlConnection("Data Source=SERV-PC\\MSQLSERVER;Initial Catalog=MyDatabase;Integrated Security=True"))
{
using (var cmd = new SqlCommand())
{
cmd.Connection = conn;
cmd.CommandText = "SELECT DISTINCT [ColumnA], [DateReceive] FROM [MyDatabase].[dbo].[dummy] WHERE [ColumnA]=@loca AND [DateReceive] BETWEEN '01/01/2013' and '01/07/2013' ";
cmd.Parameters.AddWithValue("@loca", DropDownList1.SelectedValue.ToString());
conn.Open();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var tmp = reader["ColumnA"];
if (tmp != DBNull.Value)
{
ListBox1.Items.Add(reader["ColumnA"].ToString());
}
}
}
}
}
推荐答案
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You asked this twice. Please ask once and EDIT your question to add detail if asked for it.
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