guihuan.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class guihuan : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            DataBind();
        }
        if (RadioButtonList1.SelectedValue == "读者所借书")
        {
            if (txtReader.Text != "")
            {
                gvguihuan.Enabled = true;
            }
            
                
            
        }
        else
        {
            gvguihuan.Enabled = false;
        }

        
        
    }
    public void DataBind()
    {
        if (RadioButtonList1.SelectedValue == "读者所借书")
        {
            if (txtReader.Text != "")
            {
                DataSet ds = new DataSet();
                using (SqlConnection sqlconn = DB.con())
                {
                    SqlDataAdapter sqld = new SqlDataAdapter("select * from book where zhuangtai='是' and jieshuzhe='" + txtReaderID.Text + "' order by beijie desc", sqlconn);
                    sqld.Fill(ds);
                }

                string[] key = { "no" };
                gvguihuan.DataKeyNames = key;
                //GridView绑定数据源
                gvguihuan.DataSource = ds.Tables[0].DefaultView;//指定GridView的数据源
                gvguihuan.DataBind();
            }
        }
        else
        {
            DataSet ds = new DataSet();
            using (SqlConnection sqlconn = DB.con())
            {