普通的ADO.NET获取DataSet的写法如下：
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using System.Configuration;using System.Data;using System.Data.SqlClient;public class SQLHelper{ private static readonly string ConnectionString = ConfigurationManager.ConnectionStrings["Default"].ConnectionString; public static DataSet GetDataSet(string sql) { using (SqlConnection conn =new SqlConnection(ConnectionString)) { SqlCommand cmd = new SqlCommand(sql, conn); SqlDataAdapter adapter = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); conn.Open(); adapter.Fill(ds); return ds; } }} |
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<?xml version="1.0" encoding="utf-8" ?><configuration> <connectionStrings> <add name="Default" connectionString="Data Source=.;Initial Catalog=EFDb;Integrated Security=true"/> </connectionStrings></configuration> |
这里需要获取DataTable的主键信息，调试时发现没有主键信息，而实际数据库中是有主键（Id）
此时需要给SqlDataAdapter设置属性MissingSchemaAction为System.Data.MissingSchemaAction.AddWithKey
修改后的SQLHelper为
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using System.Configuration;using System.Data;using System.Data.SqlClient;public class SQLHelper{ private static readonly string ConnectionString = ConfigurationManager.ConnectionStrings["Default"].ConnectionString; public static DataSet GetDataSet(string sql) { using (SqlConnection conn =new SqlConnection(ConnectionString)) { SqlCommand cmd = new SqlCommand(sql, conn); SqlDataAdapter adapter = new SqlDataAdapter(cmd); adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey; DataSet ds = new DataSet(); conn.Open(); adapter.Fill(ds); return ds; } }} |
以上这篇ADO.NET获取数据(DataSet)同时获取表的架构实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/godbell/archive/2017/12/17/8051418.html
