C＃ - >從SQL Server 2008中檢索數據集

Question

我的SQL Server數據庫中有一個名為NAMES的表。 我正在嘗試檢索整個表並將其放入數據集中：

//get the connection string from web.config
string connString = ConfigurationManager.ConnectionStrings["Platform"].ConnectionString;
DataSet dataset = new DataSet();

using (SqlConnection conn = new SqlConnection(connString))
{
    SqlDataAdapter adapter = new SqlDataAdapter();                
    adapter.SelectCommand = new SqlCommand("NAMES", conn);
    adapter.Fill(dataset);
}  

這會拋出一個sql異常，

“無效的對象名稱”...

我究竟做錯了什么？

Answer 1

您沒有將實際的SQL select命令傳遞給SqlCommand構造函數。

Answer 2

打開連接!!!!!!

 //get the connection string from web.config
 string connString = ConfigurationManager .ConnectionStrings["Platform"].ConnectionString;
 DataSet dataset = new DataSet();

 using (SqlConnection conn = new SqlConnection(connString))
 {
     SqlDataAdapter adapter = new SqlDataAdapter();                
     adapter.SelectCommand = new SqlCommand("select * from [NAMES]", conn);
     conn.Open(); 
     adapter.Fill(dataset);
 }  

Answer 3

首先檢查是否從dbo中選擇*。[名稱]是否在你的sql中徘徊？

     string connString = ConfigurationManager .ConnectionStrings["Platform"].ConnectionString;
        Dataset ds=new Dataset();
        SqlConnection con = new Sqlconnection(connString);
        SqlDataAdapter adapter = new SqlDataAdapter("Select * from dbo.[Names]",con);
        adapter.Fill(ds);