usermanager.aspx.cs

图书管理的相关流程,借书还书流程,比较详细

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;

public partial class UserManager : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindData();
        }
    }
    private void BindData()
    {
        string strSql = "SELECT [userID],[userLoginID],[userPwd],[userName] FROM [userInfo]WHERE [userStatus]!=0";
        userGV.DataSource = DBhelper.sqlLoad(strSql);
        userGV.DataBind();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        Session["userID"] = null;
        Response.Redirect("UserInfos.aspx");
    }
    protected void userGV_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "edit")
        {

            //将所选取的行号实体化
            int index = int.Parse(e.CommandArgument.ToString());

            //利用Session传递用户编号至编辑页
            Session["userID"] = userGV.Rows[index].Cells[0].Text;
            Response.Redirect("UserInfos.aspx");

        }
    }
    protected void userGV_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string userID = userGV.Rows[e.RowIndex].Cells[0].Text;
        string strSql = "SELECT [borrowID] FROM [borrowInfo] WHERE [borrowStatus]=0 AND [userID]='" + userID + "'";
        if (DBhelper.sqlLoad(strSql).Rows.Count == 0)
        {
            strSql = "DELETE FROM [userInfo] WHERE [userID]='" + userID + "'";
            int i = DBhelper.sqlinit(strSql);
            if (i > 0)
            {
                txtMsg.Text = "删除成功！";
                BindData();
            }
        }
        else
        {
            txtMsg.Text = "此用户仍有书籍尚未归还，无法删除！";
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Redirect("BorrowManager.aspx");
    }
}