default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
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;

public partial class _Default : System.Web.UI.Page
{
   
    protected void Page_Load(object sender, EventArgs e)
    {

        if (!Page.IsPostBack)//首次执行页面时
        {
           BindData();//绑定自定义方法BindData
            if (Request.QueryString["BookID"] != null)//判断，如果可以获取到BookID的值，则执行以下操作
            {
                //Label5.Text = Request.QueryString["BookID"];
                SqlConnection con = new SqlConnection("Server=(Local);Uid=sa;pwd=;DataBase=fangdawei");
                con.Open();
                SqlDataAdapter ada = new SqlDataAdapter("select * from tb_Book where BookID=" + Request.QueryString["BookID"] + "", con);
                DataSet ds = new DataSet();
                ada.Fill(ds, "tb_Book");
                DataRowView drv = ds.Tables["tb_Book"].DefaultView[0];
                TextBox1.Text = drv["BookName"].ToString();
                TextBox2.Text = drv["BookIntroduce"].ToString();
                TextBox3.Text = drv["BookPrice"].ToString();
                DropDownList1.SelectedValue = drv["BookIsNew"].ToString();
            }
        }
    }
    public static int iid;
    public void BindData()
    {
        SqlConnection myconn = new SqlConnection("server=(local);Database=fangdawei;Uid=sa;Pwd=");
        myconn.Open();
        SqlDataAdapter da = new SqlDataAdapter("select * from tb_Book", myconn);
        DataSet ds = new DataSet();
        da.Fill(ds, "tb_Book");
        GridView1.DataSource = ds;
        GridView1.DataKeyNames = new string[] { "BookID" };
        GridView1.DataBind();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection myconn = new SqlConnection("server=(local);Database=fangdawei;Uid=sa;Pwd=");
        //打开链接
        myconn.Open();
        //插入命令
        string sqlstr = "update tb_Book set BookName=@BookName,BookIntroduce=@BookIntroduce,BookPrice=@BookPrice,BookIsNew=@BookIsNew where BookID=@BookID";
        SqlCommand mycom = new SqlCommand(sqlstr, myconn);
        //添加参数
        mycom.Parameters.Add(new SqlParameter("@BookID", SqlDbType.Int));
        mycom.Parameters.Add(new SqlParameter("@BookName", SqlDbType.VarChar, 50));
        mycom.Parameters.Add(new SqlParameter("@BookIntroduce", SqlDbType.VarChar, 50));
        mycom.Parameters.Add(new SqlParameter("@BookPrice", SqlDbType.Money, 8));
        mycom.Parameters.Add(new SqlParameter("@BookIsNew", SqlDbType.Char, 10));
        //给参数赋值
        mycom.Parameters["@BookName"].Value = TextBox1.Text;
        mycom.Parameters["@BookIntroduce"].Value = TextBox2.Text;
        mycom.Parameters["@BookPrice"].Value = Convert.ToDecimal(TextBox3.Text);
        mycom.Parameters["@BookIsNew"].Value = DropDownList1.SelectedValue.ToString();
        mycom.Parameters["@BookID"].Value = iid;
        try
        {
            //执行添加语句
            mycom.ExecuteNonQuery();
            Response.Write("<script language=javascript>alert('修改成功!')</script>");
            myconn.Close();
            BindData();
        }
        catch(Exception eeee)
        {
            
            //Response.Write("<script language=javascript>alert('eeee.')</script>");
            Response.Write(eeee.Message.ToString());
        }


    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        BindData();
    }

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
        SqlConnection myconn = new SqlConnection("server=(local);Database=fangdawei;Uid=sa;Pwd=");
        myconn.Open();
        SqlCommand cmd = new SqlCommand("select * from tb_Book where BookID="+id, myconn);
        SqlDataReader sdr = cmd.ExecuteReader();
        sdr.Read();
        TextBox1.Text = sdr["BookName"].ToString();
        TextBox2.Text=sdr["BookIntroduce"].ToString();
        TextBox3.Text=sdr["BookPrice"].ToString();
        DropDownList1.SelectedValue = sdr["BookIsNew"].ToString();
        iid = id;
        myconn.Close();
    }
 
}