发布网友 发布时间:2022-04-30 19:03
共5个回答
懂视网 时间:2022-04-30 23:24
System; using System.Collections.Generic; using System.Data; using System.Data.SqlClient; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { ConnectDB(); } public void ConnectDB() { //创建一个新连接 SqlConnection conn = new SqlConnection(); //已经存在的数据库master的连接字符串 string connToMaster = "Server=localhost;DataBase=master;UID=sa;PWD=123456"; //新建数据库的连接字符串 string connToDb = "Server=localhost;DataBase=SSPU;UID=sa;PWD=123456"; //创建数据库的Sql语句,将来由已经存在的数据库连接执行此命令 //先判断数据库及数据表是否存在 string createDbStr = "if NOT exists"+ "(" + "select * from master.dbo.sysdatabases where name " + "= ‘" + "SSPU" + "‘)" + "Create database [SSPU]"; string createTableStr = "if not exists(select * from sysobjects where xtype=‘u‘ and name=‘student‘)create table student (s_id int primary key,name Nchar(5))"; string insertStr = "insert into student values(1,N‘小米‘)"; string selectStr = "select * from student"; //创建一个新的SqlCommand对象 SqlCommand cmd = new SqlCommand(createDbStr, conn); //首先连接到已经存在的数据库master, conn.ConnectionString = connToMaster; conn.Open(); //执行了下面的语句,就执行了SQL语句,即创建了数据库 cmd.ExecuteNonQuery(); //conn.ChangeDatabase("SSPU"); conn.Close(); //关闭旧连接,打开新连接 conn.ConnectionString = connToDb; conn.Open(); //int at = (int)cmd.ExecuteScalar(); cmd.CommandText = createTableStr; cmd.ExecuteNonQuery(); cmd.CommandText = insertStr; cmd.ExecuteNonQuery(); conn.Close(); cmd.CommandText = selectStr; SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); da.Fill(dt); GridView gv = new GridView(); form1.Controls.Add(gv); gv.AutoGenerateColumns = true; gv.DataSource = dt; gv.DataBind(); } }
ASP.NET动态创建数据库和表
标签:
热心网友 时间:2022-04-30 20:32
先写好创建表的SQL语句,然后像执行普通SQL语句一样执行热心网友 时间:2022-04-30 21:50
执行创建表的sql语句就行了。热心网友 时间:2022-04-30 23:25
create table name(id int identity(1,1) primary key,字段2,......)热心网友 时间:2022-05-01 01:16
晕……