T-SQL语句实现GRIDVIEW的增删改查的实例练习

来源：互联网发布：匡恩网络圈钱公司编辑：程序博客网时间：2024/05/16 00:42

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace CommandExercise
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bind();
            }
        }

        protected void btnAddStu_Click(object sender, EventArgs e) //增
        {
            string stuId = txtStuId.Text;
            string stuname = txtStuName.Text;
            string stuclass = txtStuClass.Text;
            string strSql ="insert stuform values("+stuId+",'"+stuname+"','"+stuclass+"')";
            string connectString = ConfigurationManager.ConnectionStrings["数据库连接"].ConnectionString;
            SqlConnection con = new SqlConnection();
            con.ConnectionString = connectString;
            con.Open();
            SqlCommand com = new SqlCommand(strSql, con);
            int sum = com.ExecuteNonQuery();
            if (sum > 0)
            {
                bind();
                txtStuClass.Text = txtStuId.Text = txtStuName.Text = "";
            }
            else
            {
                Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "", "<script>alert('添加失败!')</script>");
            }
            con.Close();
        }
        protected void bind()
        {
            string connectString = @"Data Source=GANG;Initial Catalog=stu;Persist Security Info=True;User ID=aspuser;password=000000";
            string strSql = "select * from stuform";
            SqlConnection con = new SqlConnection();
            con.ConnectionString = connectString;
            con.Open();
            SqlCommand com = new SqlCommand(strSql, con);
            SqlDataAdapter sda = new SqlDataAdapter();
            sda.SelectCommand = com;
            DataSet ds = new DataSet();
            sda.Fill(ds);
            con.Close();
            gvShowStu.DataSource = ds;
            gvShowStu.DataBind();
        }

        protected void btnDeleStu_Click(object sender, EventArgs e) //删
        {
            string stuid = txtDeleStuId.Text;
            string strSql = "delete from stuform where StuID=" + stuid;
            string connectString = ConfigurationManager.ConnectionStrings["数据库连接"].ConnectionString;
            SqlConnection con = new SqlConnection();
            con.ConnectionString = connectString;
            con.Open();
            SqlCommand com = new SqlCommand(strSql, con);
            int sum = com.ExecuteNonQuery();
            if (sum > 0)
            {
                bind();
                txtDeleStuId.Text = "";
            }
            else
            {
                Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "", "<script>alert('删除失败!')</script>");
            }
            con.Close();
        }

        protected void btnSearchStu_Click(object sender, EventArgs e) //查
        {
            string stuid = txtSearchStuID.Text;
            string strSql = "select * from stuform where StuID=" + stuid;
            string connectString = ConfigurationManager.ConnectionStrings["数据库连接"].ConnectionString;
            SqlConnection con = new SqlConnection();
            con.ConnectionString = connectString;
            con.Open();
            SqlCommand com = new SqlCommand(strSql,con);
            SqlDataReader sdr = com.ExecuteReader();
            sdr.Read();
            lblName.Text = sdr["StuName"].ToString();
            lblClass.Text = sdr["StuClass"].ToString();
            con.Close();
            sdr.Close();
        }

        protected void btnUpdateStu_Click(object sender, EventArgs e)//改
        {
            string strid = txtUpdateID.Text;
            string strName = txtUpdateName.Text;
            string strClass = txtUpdateClass.Text;
            string strSql="update stuform set StuName='"+strName+"',StuClass='"+strClass+"'where StuID="+strid;
            string connectString = ConfigurationManager.ConnectionStrings["数据库连接"].ConnectionString;
            SqlConnection con = new SqlConnection();
            con.ConnectionString = connectString;
            con.Open();
            SqlCommand com = new SqlCommand(strSql,con);
            int sum = com.ExecuteNonQuery();
            if (sum > 0)
            {
                bind();
                txtUpdateClass.Text = txtUpdateID.Text = txtUpdateName.Text = "";

            }
            else
            {
                Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "", "<script>alert('修改失败!')</script>");
            }
            con.Close();

}
}
}