问题描述

可能重复:
如何从存储中检索表数据表的过程

我正在尝试填充我的数据表.我创建了一个数据表 tmpABCD，但我需要使用存储过程中的值填充它.我无法继续.

I am trying to populate my datatable. I have created a datatable tmpABCD but i need to populate this with the values from a stored procedure. I am not able to proceed further.

SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["DB"].ConnectionString);
sqlcon.Open();
SqlCommand cmd = new SqlCommand("usp_GetABCD", sqlcon);

DataTable dt = new DataTable("tmpABCD");

dt.Columns.Add(new DataColumn("A"));
dt.Columns.Add(new DataColumn("B"));
dt.Columns.Add(new DataColumn("C"));
dt.Columns.Add(new DataColumn("D"));

推荐答案

您不需要手动添加列.只需使用 DataAdapter ，它很简单:

You don't need to add the columns manually. Just use a DataAdapter and it's simple as:

DataTable table = new DataTable();
using(var con = new SqlConnection(ConfigurationManager.ConnectionStrings["DB"].ConnectionString))
using(var cmd = new SqlCommand("usp_GetABCD", con))
using(var da = new SqlDataAdapter(cmd))
{
   cmd.CommandType = CommandType.StoredProcedure;
   da.Fill(table);
}

请注意，您甚至不需要打开/关闭连接.这将由 DataAdapter 隐式完成.

Note that you even don't need to open/close the connection. That will be done implicitly by the DataAdapter.

与 SELECT 语句关联的连接对象必须是有效，但不需要打开.如果连接关闭在调用 Fill 之前，打开它以检索数据，然后关闭它.如果在调用 Fill 之前连接是打开的，它保持打开状态.

The connection object associated with the SELECT statement must be valid, but it does not need to be open. If the connection is closed before Fill is called, it is opened to retrieve data, then closed. If the connection is open before Fill is called, it remains open.

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