C#中簡單操做SQLserver數據庫（ADO.NET的簡單應用）

 1 using System.Data.SqlClient;
 2 using System.Configuration;
 3 
 4 /// <summary>
 5 /// sql幫助類
 6 /// </summary>
 7 public class SqlHelp
 8 {
 9     //建立鏈接對象字符串
10     //public string Sqlconn = ConfigurationManager.ConnectionStrings["SqlConnString"].ConnectionString;//這裏須要到Web.config添加ConnectionStrings
11     public string Sqlconn = "server=****;uid=**;pwd=**;database=****";
12     /// <summary>
13     /// SQL查詢
14     /// </summary>
15     public DataSet Qyery() 
16     {
17         //數據庫鏈接器,建立數據庫鏈接.參數：鏈接對象字符串
18         SqlConnection conn = new SqlConnection(Sqlconn);
19         //數據適配器，填充DataSet.參數1：SQL查詢語句，參數2：數據庫鏈接.
20         SqlDataAdapter sda = new SqlDataAdapter("select * from 表名", conn);
21         //實例化數據集.
22         DataSet ds = new DataSet();
23         //將數據適配器中的數據填充到數據集.
24         sda.Fill(ds);
25         return ds;
26     }
27     /// <summary>
28     /// SQL操做
29     /// </summary>
30     public int Operation()
31     {
32         //數據庫鏈接器,建立數據庫鏈接.
33         SqlConnection conn = new SqlConnection(Sqlconn);
34         //數據庫命名對象,指定要執行sql語句與鏈接對象conn.參數1：SQL操做語句，參數2：數據庫鏈接.
35         SqlCommand cmd = new SqlCommand("insert  INTO 表名 VALUES (值1，值2，....)", conn);
36         //打開數據庫
37         conn.Open();
38         //執行,返回影響行數
39         int rows = cmd.ExecuteNonQuery();
40         //關閉數據庫
41         conn.Close();
42         return rows;
43     }
44 }

1 <connectionStrings>
2     <add name="SqlConnString" connectionString="server=****;uid=**;pwd=**;database=****"/>
3 </connectionStrings>